diff --git a/scripts/base/frameworks/cluster/__load__.zeek b/scripts/base/frameworks/cluster/__load__.zeek
index 2072b457a7..c1656ef734 100644
--- a/scripts/base/frameworks/cluster/__load__.zeek
+++ b/scripts/base/frameworks/cluster/__load__.zeek
@@ -1,7 +1,9 @@
 # Load the core cluster support.
 @load ./main
 @load ./pools
+@load ./pubsub
 @load ./telemetry
+@load ./types
 
 @if ( Cluster::is_enabled() )
 
@@ -15,12 +17,6 @@ redef Broker::log_topic = Cluster::rr_log_topic;
 # Add a cluster prefix.
 @prefixes += cluster
 
-# Broker-specific additions:
-@if ( Cluster::backend == Cluster::CLUSTER_BACKEND_BROKER )
-@load ./broker-backpressure
-@load ./broker-telemetry
-@endif
-
 @if ( Supervisor::is_supervised() )
 # When running a supervised cluster, populate Cluster::nodes from the node table
 # the Supervisor provides to new Zeek nodes. The management framework configures
@@ -41,7 +37,7 @@ redef Cluster::manager_is_logger = F;
 
 @if ( Cluster::node in Cluster::nodes )
 
-@load ./setup-connections
+@load ./setup-subscriptions
 
 @if ( Cluster::local_node_type() == Cluster::MANAGER )
 @load ./nodes/manager
diff --git a/scripts/base/frameworks/cluster/main.zeek b/scripts/base/frameworks/cluster/main.zeek
index 7124cf23d8..f4e2a17808 100644
--- a/scripts/base/frameworks/cluster/main.zeek
+++ b/scripts/base/frameworks/cluster/main.zeek
@@ -18,6 +18,8 @@
 @load base/frameworks/control
 @load base/frameworks/broker
 
+@load ./types
+
 module Cluster;
 
 export {
@@ -75,19 +77,6 @@ export {
 	## :zeek:see:`Cluster::create_store` with the *persistent* argument set true.
 	const default_persistent_backend = Broker::SQLITE &redef;
 
-	## The default maximum queue size for WebSocket event dispatcher instances.
-	##
-	## If the maximum queue size is reached, events from external WebSocket
-	## clients will be stalled and processed once the queue has been drained.
-	##
-	## An internal metric named ``cluster_onloop_queue_stalls`` and
-	## labeled with a ``WebSocketEventDispatcher:<host>:<port>`` tag
-	## is incremented when the maximum queue size is reached.
-	const default_websocket_max_event_queue_size = 32 &redef;
-
-	## The default ping interval for WebSocket clients.
-	const default_websocket_ping_interval = 5 sec &redef;
-
 	## Setting a default dir will, for persistent backends that have not
 	## been given an explicit file path via :zeek:see:`Cluster::stores`,
 	## automatically create a path within this dir that is based on the name of
@@ -157,55 +146,6 @@ export {
 		message:  string;
 	} &log;
 
-	## Types of nodes that are allowed to participate in the cluster
-	## configuration.
-	type NodeType: enum {
-		## A dummy node type indicating the local node is not operating
-		## within a cluster.
-		NONE,
-		## A node type which is allowed to view/manipulate the configuration
-		## of other nodes in the cluster.
-		CONTROL,
-		## A node type responsible for log management.
-		LOGGER,
-		## A node type responsible for policy management.
-		MANAGER,
-		## A node type for relaying worker node communication and synchronizing
-		## worker node state.
-		PROXY,
-		## The node type doing all the actual traffic analysis.
-		WORKER,
-	};
-
-	## Record type to indicate a node in a cluster.
-	type Node: record {
-		## Identifies the type of cluster node in this node's configuration.
-		node_type:    NodeType;
-		## The IP address of the cluster node.
-		ip:           addr;
-		## If the *ip* field is a non-global IPv6 address, this field
-		## can specify a particular :rfc:`4007` ``zone_id``.
-		zone_id:      string      &default="";
-		## The port that this node will listen on for peer connections.
-		## A value of ``0/unknown`` means the node is not pre-configured to listen.
-		p:            port        &default=0/unknown;
-		## Name of the manager node this node uses.  For workers and proxies.
-		manager:      string      &optional;
-		## A unique identifier assigned to the node by the broker framework.
-		## This field is only set while a node is connected.
-		id: string                &optional;
-		## The port used to expose metrics to Prometheus. Setting this in a cluster
-		## configuration will override the setting for Telemetry::metrics_port for
-		## the node.
-		metrics_port: port        &optional;
-	};
-
-	## Record to represent a cluster node including its name.
-	type NamedNode: record {
-		name: string;
-		node: Node;
-	};
-
 	## This function can be called at any time to determine if the cluster
 	## framework is being enabled for this run.
 	##
@@ -317,66 +257,6 @@ export {
 	## Returns: T on success, else F.
 	global init: function(): bool;
 
-	## Subscribe to the given topic.
-	##
-	## topic: The topic to subscribe to.
-	##
-	## Returns: T on success, else F.
-	global subscribe: function(topic: string): bool;
-
-	## Unsubscribe from the given topic.
-	##
-	## topic: The topic to unsubscribe from.
-	##
-	## Returns: T on success, else F.
-	global unsubscribe: function(topic: string): bool;
-
-	## An event instance for cluster pub/sub.
-	##
-	## See :zeek:see:`Cluster::publish` and :zeek:see:`Cluster::make_event`.
-	type Event: record {
-		## The event handler to be invoked on the remote node.
-		ev: any;
-		## The arguments for the event.
-		args: vector of any;
-	};
-
-	## The TLS options for a WebSocket server.
-	##
-	## If cert_file and key_file are set, TLS is enabled. If both
-	## are unset, TLS is disabled. Any other combination is an error.
-	type WebSocketTLSOptions: record {
-		## The cert file to use.
-		cert_file: string &optional;
-		## The key file to use.
-		key_file: string &optional;
-		## Expect peers to send client certificates.
-		enable_peer_verification: bool &default=F;
-		## The CA certificate or CA bundle used for peer verification.
-		## Empty will use the implementations's default when
-		## ``enable_peer_verification`` is T.
-		ca_file: string &default="";
-		## The ciphers to use. Empty will use the implementation's defaults.
-		ciphers: string &default="";
-	};
-
-	## WebSocket server options to pass to :zeek:see:`Cluster::listen_websocket`.
-	type WebSocketServerOptions: record {
-		## The address to listen on, cannot be used together with ``listen_host``.
-		listen_addr: addr &optional;
-		## The port the WebSocket server is supposed to listen on.
-		listen_port: port;
-		## The maximum event queue size for this server.
-		max_event_queue_size: count &default=default_websocket_max_event_queue_size;
-		## Ping interval to use. A WebSocket client not responding to
-		## the pings will be disconnected. Set to a negative value to
-		## disable pings. Subsecond intervals are currently not supported.
-		ping_interval: interval &default=default_websocket_ping_interval;
-		## The TLS options used for this WebSocket server. By default,
-		## TLS is disabled. See also :zeek:see:`Cluster::WebSocketTLSOptions`.
-		tls_options: WebSocketTLSOptions &default=WebSocketTLSOptions();
-	};
-
 	## Start listening on a WebSocket address.
 	##
 	## options: The server :zeek:see:`Cluster::WebSocketServerOptions` to use.
@@ -384,38 +264,16 @@ export {
 	## Returns: T on success, else F.
 	global listen_websocket: function(options: WebSocketServerOptions): bool;
 
-	## Network information of an endpoint.
-	type NetworkInfo: record {
-		## The IP address or hostname where the endpoint listens.
-		address: string;
-		## The port where the endpoint is bound to.
-		bound_port: port;
-	};
-
-	## Information about a WebSocket endpoint.
-	type EndpointInfo: record {
-		id: string;
-		network: NetworkInfo;
-		## The value of the X-Application-Name HTTP header, if any.
-		application_name: string &optional;
-	};
-
-	## A hook invoked for every :zeek:see:`Cluster::subscribe` call.
+	## This hook is called when the local node connects to other nodes based on
+	## the given cluster layout. Breaking from the hook will prevent connection
+	## establishment.
 	##
-	## Breaking from this hook has no effect.
+	## This hook only applies to the Broker cluster backend.
 	##
-	## topic: The topic string as given to :zeek:see:`Cluster::subscribe`.
-	global on_subscribe: hook(topic: string);
-
-	## A hook invoked for every :zeek:see:`Cluster::subscribe` call.
-	##
-	## Breaking from this hook has no effect.
-	##
-	## topic: The topic string as given to :zeek:see:`Cluster::subscribe`.
-	global on_unsubscribe: hook(topic: string);
+	## connectee: The node to connect to.
+	global connect_node_hook: hook(connectee: NamedNode);
 }
 
-# Needs declaration of Cluster::Event type.
 @load base/bif/cluster.bif
 @load base/bif/plugins/Zeek_Cluster_WebSocket.events.bif.zeek
 
@@ -534,27 +392,6 @@ event Cluster::hello(name: string, id: string) &priority=10
 	add active_node_ids[n$node_type][id];
 	}
 
-event Broker::peer_added(endpoint: Broker::EndpointInfo, msg: string) &priority=10
-	{
-	if ( ! Cluster::is_enabled() )
-		return;
-
-	local e = Broker::make_event(Cluster::hello, node, Cluster::node_id());
-	Broker::publish(nodeid_topic(endpoint$id), e);
-	}
-
-event Broker::peer_lost(endpoint: Broker::EndpointInfo, msg: string) &priority=10
-	{
-	for ( node_name, n in nodes )
-		{
-		if ( n?$id && n$id == endpoint$id )
-			{
-			event Cluster::node_down(node_name, endpoint$id);
-			break;
-			}
-		}
-	}
-
 event node_down(name: string, id: string) &priority=10
 	{
 	local found = F;
@@ -674,16 +511,6 @@ function init(): bool
 	return Cluster::Backend::__init(Cluster::node_id());
 	}
 
-function subscribe(topic: string): bool
-	{
-	return Cluster::__subscribe(topic);
-	}
-
-function unsubscribe(topic: string): bool
-	{
-	return Cluster::__unsubscribe(topic);
-	}
-
 function listen_websocket(options: WebSocketServerOptions): bool
 	{
 	return Cluster::__listen_websocket(options);
diff --git a/scripts/base/frameworks/cluster/pools.zeek b/scripts/base/frameworks/cluster/pools.zeek
index 418706b554..effb491d10 100644
--- a/scripts/base/frameworks/cluster/pools.zeek
+++ b/scripts/base/frameworks/cluster/pools.zeek
@@ -346,7 +346,7 @@ function pool_sorter(a: Pool, b: Pool): int
 	return strcmp(a$spec$topic, b$spec$topic);
 	}
 
-# Needs to execute before the zeek_init in setup-connections
+# Needs to execute before the zeek_init in setup-subscriptions
 event zeek_init() &priority=-5
 	{
 	if ( ! Cluster::is_enabled() )
diff --git a/scripts/base/frameworks/cluster/pubsub.zeek b/scripts/base/frameworks/cluster/pubsub.zeek
new file mode 100644
index 0000000000..591a80f986
--- /dev/null
+++ b/scripts/base/frameworks/cluster/pubsub.zeek
@@ -0,0 +1,49 @@
+# A script that can be loaded by other scripts to access the publish subscribe API.
+
+@load ./types
+
+module Cluster;
+
+export {
+	## Subscribe to the given topic.
+	##
+	## topic: The topic to subscribe to.
+	##
+	## Returns: T on success, else F.
+	global subscribe: function(topic: string): bool;
+
+	## Unsubscribe from the given topic.
+	##
+	## topic: The topic to unsubscribe from.
+	##
+	## Returns: T on success, else F.
+	global unsubscribe: function(topic: string): bool;
+
+	## A hook invoked for every :zeek:see:`Cluster::subscribe` call.
+	##
+	## Breaking from this hook has no effect.
+	##
+	## topic: The topic string as given to :zeek:see:`Cluster::subscribe`.
+	global on_subscribe: hook(topic: string);
+
+	## A hook invoked for every :zeek:see:`Cluster::subscribe` call.
+	##
+	## Breaking from this hook has no effect.
+	##
+	## topic: The topic string as given to :zeek:see:`Cluster::subscribe`.
+	global on_unsubscribe: hook(topic: string);
+}
+
+# base/bif/cluster.bif.zeek generated from from src/cluster/cluster.bif contains the
+# Cluster::publish(), Cluster::publish_hrw() and Cluster::publish_rr() APIs
+@load base/bif/cluster.bif
+
+function subscribe(topic: string): bool
+	{
+	return Cluster::__subscribe(topic);
+	}
+
+function unsubscribe(topic: string): bool
+	{
+	return Cluster::__unsubscribe(topic);
+	}
diff --git a/scripts/base/frameworks/cluster/setup-connections.zeek b/scripts/base/frameworks/cluster/setup-connections.zeek
index 84c2a7d2fe..ef373ecf47 100644
--- a/scripts/base/frameworks/cluster/setup-connections.zeek
+++ b/scripts/base/frameworks/cluster/setup-connections.zeek
@@ -1,156 +1,3 @@
-##! This script establishes communication among all nodes in a cluster
-##! as defined by :zeek:id:`Cluster::nodes`.
+@deprecated "Remove in v9.1: Load base/frameworks/cluster/setup-subscriptions instead"
 
-@load ./main
-@load ./pools
-@load base/frameworks/broker
-
-module Cluster;
-
-export {
-	## This hook is called when the local node connects to other nodes based on
-	## the given cluster layout. Breaking from the hook will prevent connection
-	## establishment.
-	##
-	## connectee: The node to connect to.
-	global connect_node_hook: hook(connectee: NamedNode);
-}
-
-function connect_peer(node_type: NodeType, node_name: string)
-	{
-	local nn = nodes_with_type(node_type);
-
-	for ( i in nn )
-		{
-		local n = nn[i];
-
-		if ( n$name != node_name )
-			next;
-		if ( ! hook connect_node_hook(n) )
-			return;
-
-		local status = Broker::peer(cat(n$node$ip), n$node$p,
-		                            Cluster::retry_interval);
-		Cluster::log(fmt("initiate peering with %s:%s, retry=%s, status=%s",
-		                 n$node$ip, n$node$p, Cluster::retry_interval,
-		                 status));
-		return;
-		}
-
-	Reporter::warning(fmt("connect_peer: node '%s' (%s) not found", node_name, node_type));
-	}
-
-function connect_peers_with_type(node_type: NodeType)
-	{
-	local nn = nodes_with_type(node_type);
-
-	for ( i in nn )
-		{
-		local n = nn[i];
-
-		if ( ! hook connect_node_hook(n) )
-			next;
-
-		local status = Broker::peer(cat(n$node$ip), n$node$p,
-		                            Cluster::retry_interval);
-		Cluster::log(fmt("initiate peering with %s:%s, retry=%s, status=%s",
-		                 n$node$ip, n$node$p, Cluster::retry_interval,
-		                 status));
-		}
-	}
-
-event zeek_init() &priority=-10
-	{
-	if ( getenv("ZEEKCTL_CHECK_CONFIG") != "" )
-		return;
-
-	local self = nodes[node];
-
-	for ( i in registered_pools )
-		{
-		local pool = registered_pools[i];
-
-		if ( node in pool$nodes )
-			Cluster::subscribe(pool$spec$topic);
-		}
-
-	switch ( self$node_type ) {
-	case NONE:
-		return;
-	case CONTROL:
-		break;
-	case LOGGER:
-		Cluster::subscribe(Cluster::logger_topic);
-		break;
-	case MANAGER:
-		Cluster::subscribe(Cluster::manager_topic);
-		break;
-	case PROXY:
-		Cluster::subscribe(Cluster::proxy_topic);
-		break;
-	case WORKER:
-		Cluster::subscribe(Cluster::worker_topic);
-		break;
-	default:
-		Reporter::error(fmt("Unhandled cluster node type: %s", self$node_type));
-		return;
-	}
-
-	Cluster::subscribe(nodeid_topic(Cluster::node_id()));
-	Cluster::subscribe(node_topic(node));
-
-
-	# Listening and connecting to other peers is broker specific,
-	# short circuit if Zeek is configured with a different
-	# cluster backend.
-	#
-	# In the future, this could move into a policy script, but
-	# for the time being it's easier for backwards compatibility
-	# to keep this here.
-	if ( Cluster::backend != Cluster::CLUSTER_BACKEND_BROKER )
-		return;
-
-	# Logging setup: Anything handling logging additionally subscribes
-	# to Broker::default_log_topic_prefix.
-	switch ( self$node_type ) {
-	case LOGGER:
-		Cluster::subscribe(Broker::default_log_topic_prefix);
-		break;
-	case MANAGER:
-		if ( Cluster::manager_is_logger )
-			Cluster::subscribe(Broker::default_log_topic_prefix);
-		break;
-	}
-
-	if ( self$p != 0/unknown )
-		{
-		Broker::listen(Broker::default_listen_address,
-		               self$p,
-		               Broker::default_listen_retry);
-
-		Cluster::log(fmt("listening on %s:%s", Broker::default_listen_address, self$p));
-		}
-
-
-	switch ( self$node_type ) {
-	case MANAGER:
-		connect_peers_with_type(LOGGER);
-
-		break;
-	case PROXY:
-		connect_peers_with_type(LOGGER);
-
-		if ( self?$manager )
-			connect_peer(MANAGER, self$manager);
-
-		break;
-	case WORKER:
-		connect_peers_with_type(LOGGER);
-		connect_peers_with_type(PROXY);
-
-		if ( self?$manager )
-			connect_peer(MANAGER, self$manager);
-
-		break;
-	}
-	}
+@load ./setup-subscriptions
diff --git a/scripts/base/frameworks/cluster/setup-subscriptions.zeek b/scripts/base/frameworks/cluster/setup-subscriptions.zeek
new file mode 100644
index 0000000000..9aef5f302b
--- /dev/null
+++ b/scripts/base/frameworks/cluster/setup-subscriptions.zeek
@@ -0,0 +1,46 @@
+##! This script contains the common subscription setup logic.
+@load ./main
+@load ./pools
+
+module Cluster;
+
+event zeek_init() &priority=-5
+	{
+	if ( getenv("ZEEKCTL_CHECK_CONFIG") != "" )
+		return;
+
+	local self = nodes[node];
+
+	for ( i in registered_pools )
+		{
+		local pool = registered_pools[i];
+
+		if ( node in pool$nodes )
+			Cluster::subscribe(pool$spec$topic);
+		}
+
+	switch ( self$node_type ) {
+	case NONE:
+		return;
+	case CONTROL:
+		break;
+	case LOGGER:
+		Cluster::subscribe(Cluster::logger_topic);
+		break;
+	case MANAGER:
+		Cluster::subscribe(Cluster::manager_topic);
+		break;
+	case PROXY:
+		Cluster::subscribe(Cluster::proxy_topic);
+		break;
+	case WORKER:
+		Cluster::subscribe(Cluster::worker_topic);
+		break;
+	default:
+		Reporter::error(fmt("Unhandled cluster node type: %s", self$node_type));
+		return;
+	}
+
+	Cluster::subscribe(nodeid_topic(Cluster::node_id()));
+	Cluster::subscribe(node_topic(node));
+	}
diff --git a/scripts/base/frameworks/cluster/types.zeek b/scripts/base/frameworks/cluster/types.zeek
new file mode 100644
index 0000000000..f3243a93c6
--- /dev/null
+++ b/scripts/base/frameworks/cluster/types.zeek
@@ -0,0 +1,128 @@
+# Types used by the Cluster framework.
+module Cluster;
+
+export {
+	## Types of nodes that are allowed to participate in the cluster
+	## configuration.
+	type NodeType: enum {
+		## A dummy node type indicating the local node is not operating
+		## within a cluster.
+		NONE,
+		## A node type which is allowed to view/manipulate the configuration
+		## of other nodes in the cluster.
+		CONTROL,
+		## A node type responsible for log management.
+		LOGGER,
+		## A node type responsible for policy management.
+		MANAGER,
+		## A node type for relaying worker node communication and synchronizing
+		## worker node state.
+		PROXY,
+		## The node type doing all the actual traffic analysis.
+		WORKER,
+	};
+
+	## Record type to indicate a node in a cluster.
+	type Node: record {
+		## Identifies the type of cluster node in this node's configuration.
+		node_type:    NodeType;
+		## The IP address of the cluster node.
+		ip:           addr;
+		## If the *ip* field is a non-global IPv6 address, this field
+		## can specify a particular :rfc:`4007` ``zone_id``.
+		zone_id:      string      &default="";
+		## The port that this node will listen on for peer connections.
+		## A value of ``0/unknown`` means the node is not pre-configured to listen.
+		p:            port        &default=0/unknown;
+		## Name of the manager node this node uses.  For workers and proxies.
+		manager:      string      &optional;
+		## A unique identifier assigned to the node by the broker framework.
+		## This field is only set while a node is connected.
+		id: string                &optional;
+		## The port used to expose metrics to Prometheus. Setting this in a cluster
+		## configuration will override the setting for Telemetry::metrics_port for
+		## the node.
+		metrics_port: port        &optional;
+	};
+
+	## Record to represent a cluster node including its name.
+	type NamedNode: record {
+		name: string;
+		node: Node;
+	};
+
+	## An event instance for cluster pub/sub.
+	##
+	## See :zeek:see:`Cluster::publish` and :zeek:see:`Cluster::make_event`.
+	type Event: record {
+		## The event handler to be invoked on the remote node.
+		ev: any;
+		## The arguments for the event.
+		args: vector of any;
+	};
+
+	## The default maximum queue size for WebSocket event dispatcher instances.
+	##
+	## If the maximum queue size is reached, events from external WebSocket
+	## clients will be stalled and processed once the queue has been drained.
+	##
+	## An internal metric named ``cluster_onloop_queue_stalls`` and
+	## labeled with a ``WebSocketEventDispatcher:<host>:<port>`` tag
+	## is incremented when the maximum queue size is reached.
+	const default_websocket_max_event_queue_size = 32 &redef;
+
+	## The default ping interval for WebSocket clients.
+	const default_websocket_ping_interval = 5 sec &redef;
+
+	## The TLS options for a WebSocket server.
+	##
+	## If cert_file and key_file are set, TLS is enabled. If both
+	## are unset, TLS is disabled. Any other combination is an error.
+	type WebSocketTLSOptions: record {
+		## The cert file to use.
+		cert_file: string &optional;
+		## The key file to use.
+		key_file: string &optional;
+		## Expect peers to send client certificates.
+		enable_peer_verification: bool &default=F;
+		## The CA certificate or CA bundle used for peer verification.
+		## Empty will use the implementations's default when
+		## ``enable_peer_verification`` is T.
+		ca_file: string &default="";
+		## The ciphers to use. Empty will use the implementation's defaults.
+		ciphers: string &default="";
+	};
+
+	## WebSocket server options to pass to :zeek:see:`Cluster::listen_websocket`.
+	type WebSocketServerOptions: record {
+		## The address to listen on, cannot be used together with ``listen_host``.
+		listen_addr: addr &optional;
+		## The port the WebSocket server is supposed to listen on.
+		listen_port: port;
+		## The maximum event queue size for this server.
+		max_event_queue_size: count &default=default_websocket_max_event_queue_size;
+		## Ping interval to use. A WebSocket client not responding to
+		## the pings will be disconnected. Set to a negative value to
+		## disable pings. Subsecond intervals are currently not supported.
+		ping_interval: interval &default=default_websocket_ping_interval;
+		## The TLS options used for this WebSocket server. By default,
+		## TLS is disabled. See also :zeek:see:`Cluster::WebSocketTLSOptions`.
+		tls_options: WebSocketTLSOptions &default=WebSocketTLSOptions();
+	};
+
+	## Network information of an endpoint.
+	type NetworkInfo: record {
+		## The IP address or hostname where the endpoint listens.
+		address: string;
+		## The port where the endpoint is bound to.
+		bound_port: port;
+	};
+
+	## Information about a WebSocket endpoint.
+	type EndpointInfo: record {
+		id: string;
+		network: NetworkInfo;
+		## The value of the X-Application-Name HTTP header, if any.
+		application_name: string &optional;
+	};
+}
diff --git a/scripts/base/frameworks/supervisor/main.zeek b/scripts/base/frameworks/supervisor/main.zeek
index fbc7cf1009..2b6f0ed86a 100644
--- a/scripts/base/frameworks/supervisor/main.zeek
+++ b/scripts/base/frameworks/supervisor/main.zeek
@@ -1,6 +1,8 @@
 ##! Implements Zeek process supervision API and default behavior for its
 ##! associated (remote) control events.
 
+@load base/frameworks/cluster/pubsub
+
 @load ./api
 @load ./control
 
@@ -49,7 +51,7 @@ event zeek_init() &priority=10
 		Broker::listen();
 		}
 
-	Broker::subscribe(SupervisorControl::topic_prefix);
+	Cluster::subscribe(SupervisorControl::topic_prefix);
 	}
 
 event SupervisorControl::stop_request()
@@ -67,7 +69,7 @@ event SupervisorControl::status_request(reqid: string, node: string)
 
 	local res = Supervisor::status(node);
 	local topic = SupervisorControl::topic_prefix + fmt("/status_response/%s", reqid);
-	Broker::publish(topic, SupervisorControl::status_response, reqid, res);
+	Cluster::publish(topic, SupervisorControl::status_response, reqid, res);
 	}
 
 event SupervisorControl::create_request(reqid: string, node: Supervisor::NodeConfig)
@@ -77,7 +79,7 @@ event SupervisorControl::create_request(reqid: string, node: Supervisor::NodeCon
 
 	local res = Supervisor::create(node);
 	local topic = SupervisorControl::topic_prefix + fmt("/create_response/%s", reqid);
-	Broker::publish(topic, SupervisorControl::create_response, reqid, res);
+	Cluster::publish(topic, SupervisorControl::create_response, reqid, res);
 	}
 
 event SupervisorControl::destroy_request(reqid: string, node: string)
@@ -87,7 +89,7 @@ event SupervisorControl::destroy_request(reqid: string, node: string)
 
 	local res = Supervisor::destroy(node);
 	local topic = SupervisorControl::topic_prefix + fmt("/destroy_response/%s", reqid);
-	Broker::publish(topic, SupervisorControl::destroy_response, reqid, res);
+	Cluster::publish(topic, SupervisorControl::destroy_response, reqid, res);
 	}
 
 event SupervisorControl::restart_request(reqid: string, node: string)
@@ -97,7 +99,7 @@ event SupervisorControl::restart_request(reqid: string, node: string)
 
 	local res = Supervisor::restart(node);
 	local topic = SupervisorControl::topic_prefix + fmt("/restart_response/%s", reqid);
-	Broker::publish(topic, SupervisorControl::restart_response, reqid, res);
+	Cluster::publish(topic, SupervisorControl::restart_response, reqid, res);
 	}
 
 event Supervisor::node_status(node: string, pid: count)
@@ -106,5 +108,5 @@ event Supervisor::node_status(node: string, pid: count)
 		return;
 
 	local topic = SupervisorControl::topic_prefix + "/node_status";
-	Broker::publish(topic, SupervisorControl::node_status, node, pid);
+	Cluster::publish(topic, SupervisorControl::node_status, node, pid);
 	}
diff --git a/scripts/base/init-bare.zeek b/scripts/base/init-bare.zeek
index 07aeece67d..01f899777e 100644
--- a/scripts/base/init-bare.zeek
+++ b/scripts/base/init-bare.zeek
@@ -6011,8 +6011,8 @@ module Cluster;
 export {
 	type Cluster::Pool: record {};
 
-	## Cluster backend to use. Default is the broker backend.
-	const backend = Cluster::CLUSTER_BACKEND_BROKER &redef;
+	## Cluster backend to use. Default is the None backend.
+	const backend = Cluster::CLUSTER_BACKEND_NONE &redef;
 
 	## The event serializer to use by the cluster backend.
 	##
diff --git a/scripts/policy/frameworks/cluster/backend/broker/__load__.zeek b/scripts/policy/frameworks/cluster/backend/broker/__load__.zeek
new file mode 100644
index 0000000000..afbc86f258
--- /dev/null
+++ b/scripts/policy/frameworks/cluster/backend/broker/__load__.zeek
@@ -0,0 +1,4 @@
+@load ./main
+
+@load ./backpressure
+@load ./telemetry
diff --git a/scripts/base/frameworks/cluster/broker-backpressure.zeek b/scripts/policy/frameworks/cluster/backend/broker/backpressure.zeek
similarity index 100%
rename from scripts/base/frameworks/cluster/broker-backpressure.zeek
rename to scripts/policy/frameworks/cluster/backend/broker/backpressure.zeek
diff --git a/scripts/policy/frameworks/cluster/backend/broker/main.zeek b/scripts/policy/frameworks/cluster/backend/broker/main.zeek
new file mode 100644
index 0000000000..91da149856
--- /dev/null
+++ b/scripts/policy/frameworks/cluster/backend/broker/main.zeek
@@ -0,0 +1,152 @@
+##! Broker cluster backend support.
+##!
+##! The Broker cluster backend is a peer-to-peer backend that has been
+##! in use since Bro 2.6 until Zeek 8.1. Individual Zeek cluster nodes
+##! peer with each other using a fixed connection strategy using the information
+##! stored in :zeek:see:`Cluster::nodes` populated by the cluster-layout.zeek
+##! file or via supervisor internal functionality.
+##!
+##! Conceptually:
+##!
+##!   * All nodes peer with all logger nodes
+##!   * All worker nodes peer with all proxy nodes and the manager node
+##!   * All proxy nodes peer with the manager
+##!
+##! This implies that logger, manager and proxy nodes are all listening
+##! on the ports defined in the cluster layout.
+##!
+##! Note that publish-subscribe visibility with Broker is limited to nodes
+##! that are directly peered. A worker publishing a message to a topic another
+##! worker node is subscribed to will not be visible by the other worker.
+
+module Cluster;
+
+redef Cluster::backend = Cluster::CLUSTER_BACKEND_BROKER;
+
+function connect_peer(node_type: NodeType, node_name: string)
+	{
+	local nn = nodes_with_type(node_type);
+
+	for ( i in nn )
+		{
+		local n = nn[i];
+
+		if ( n$name != node_name )
+			next;
+		if ( ! hook connect_node_hook(n) )
+			return;
+
+		local status = Broker::peer(cat(n$node$ip), n$node$p,
+		                            Cluster::retry_interval);
+		Cluster::log(fmt("initiate peering with %s:%s, retry=%s, status=%s",
+		                 n$node$ip, n$node$p, Cluster::retry_interval,
+		                 status));
+		return;
+		}
+
+	Reporter::warning(fmt("connect_peer: node '%s' (%s) not found", node_name, node_type));
+	}
+
+function connect_peers_with_type(node_type: NodeType)
+	{
+	local nn = nodes_with_type(node_type);
+
+	for ( i in nn )
+		{
+		local n = nn[i];
+
+		if ( ! hook connect_node_hook(n) )
+			next;
+
+		local status = Broker::peer(cat(n$node$ip), n$node$p,
+		                            Cluster::retry_interval);
+		Cluster::log(fmt("initiate peering with %s:%s, retry=%s, status=%s",
+		                 n$node$ip, n$node$p, Cluster::retry_interval,
+		                 status));
+		}
+	}
+
+# Whenever a node adds a Broker peer, it sends Cluster::hello() identifying
+# itself to the peer. The other peer then raises Cluster::node_up(), upon
+# seeing the Cluster::hello()
+event Broker::peer_added(endpoint: Broker::EndpointInfo, msg: string) &priority=10
+	{
+	if ( ! Cluster::is_enabled() )
+		return;
+
+	local e = Broker::make_event(Cluster::hello, node, Cluster::node_id());
+	Broker::publish(nodeid_topic(endpoint$id), e);
+	}
+
+event Broker::peer_lost(endpoint: Broker::EndpointInfo, msg: string) &priority=10
+	{
+	for ( node_name, n in nodes )
+		{
+		if ( n?$id && n$id == endpoint$id )
+			{
+			event Cluster::node_down(node_name, endpoint$id);
+			break;
+			}
+		}
+	}
+
+# The event handler setting up subscriptions has priority -5. It runs
+# before this handler. Priority -10 also means that a user can fiddle
+# with the cluster-layout in zeek_init() for testing.
+event zeek_init() &priority=-10
+	{
+	if ( getenv("ZEEKCTL_CHECK_CONFIG") != "" )
+		return;
+
+	if ( ! Cluster::is_enabled() )
+		return;
+
+	if ( Cluster::backend != Cluster::CLUSTER_BACKEND_BROKER )
+		return;
+
+	local self = Cluster::nodes[Cluster::node];
+
+	# Logging setup: Anything handling logging additionally subscribes
+	# to Broker::default_log_topic_prefix.
+	switch ( self$node_type ) {
+	case LOGGER:
+		Cluster::subscribe(Broker::default_log_topic_prefix);
+		break;
+	case MANAGER:
+		if ( Cluster::manager_is_logger )
+			Cluster::subscribe(Broker::default_log_topic_prefix);
+		break;
+	}
+
+	if ( self$p != 0/unknown )
+		{
+		Broker::listen(Broker::default_listen_address,
+		               self$p,
+		               Broker::default_listen_retry);
+
+		Cluster::log(fmt("listening on %s:%s", Broker::default_listen_address, self$p));
+		}
+
+
+	switch ( self$node_type ) {
+	case MANAGER:
+		connect_peers_with_type(LOGGER);
+
+		break;
+	case PROXY:
+		connect_peers_with_type(LOGGER);
+
+		if ( self?$manager )
+			connect_peer(MANAGER, self$manager);
+
+		break;
+	case WORKER:
+		connect_peers_with_type(LOGGER);
+		connect_peers_with_type(PROXY);
+
+		if ( self?$manager )
+			connect_peer(MANAGER, self$manager);
+
+		break;
+	}
+	}
diff --git a/scripts/base/frameworks/cluster/broker-telemetry.zeek b/scripts/policy/frameworks/cluster/backend/broker/telemetry.zeek
similarity index 100%
rename from scripts/base/frameworks/cluster/broker-telemetry.zeek
rename to scripts/policy/frameworks/cluster/backend/broker/telemetry.zeek
diff --git a/scripts/test-all-policy.zeek b/scripts/test-all-policy.zeek
index 3292921e86..ba016a0de4 100644
--- a/scripts/test-all-policy.zeek
+++ b/scripts/test-all-policy.zeek
@@ -14,6 +14,10 @@
 @load frameworks/analyzer/packet-segment-logging.zeek
 # @load frameworks/control/controllee.zeek
 # @load frameworks/control/controller.zeek
+@load frameworks/cluster/backend/broker/__load__.zeek
+@load frameworks/cluster/backend/broker/backpressure.zeek
+@load frameworks/cluster/backend/broker/main.zeek
+@load frameworks/cluster/backend/broker/telemetry.zeek
 @ifdef ( Cluster::CLUSTER_BACKEND_ZEROMQ )
 @load frameworks/cluster/backend/zeromq/__load__.zeek
 # @load frameworks/cluster/backend/zeromq/connect.zeek
diff --git a/src/cluster/backend/CMakeLists.txt b/src/cluster/backend/CMakeLists.txt
index c5a6d1b4a2..c312395c16 100644
--- a/src/cluster/backend/CMakeLists.txt
+++ b/src/cluster/backend/CMakeLists.txt
@@ -17,3 +17,5 @@ if (ENABLE_CLUSTER_BACKEND_ZEROMQ)
 
     add_subdirectory(zeromq)
 endif ()
+
+add_subdirectory(none)
diff --git a/src/cluster/backend/none/CMakeLists.txt b/src/cluster/backend/none/CMakeLists.txt
new file mode 100644
index 0000000000..60b3dff0cb
--- /dev/null
+++ b/src/cluster/backend/none/CMakeLists.txt
@@ -0,0 +1,3 @@
+zeek_add_plugin(
+    Zeek Cluster_Backend_None
+    SOURCES Plugin.cc)
diff --git a/src/cluster/backend/none/Plugin.cc b/src/cluster/backend/none/Plugin.cc
new file mode 100644
index 0000000000..2ee9d1d051
--- /dev/null
+++ b/src/cluster/backend/none/Plugin.cc
@@ -0,0 +1,57 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+
+#include "zeek/plugin/Plugin.h"
+
+#include "zeek/cluster/Backend.h"
+#include "zeek/cluster/Component.h"
+#include "zeek/cluster/Serializer.h"
+
+namespace {
+
+using namespace zeek::cluster;
+
+/**
+ * A backend that does nothing.
+ */
+class NoneBackend : public Backend {
+private:
+    bool DoInit() override { return true; };
+    void DoTerminate() override {};
+    void DoInitPostScript() override {};
+    bool DoPublishLogWrites(const zeek::logging::detail::LogWriteHeader& header, const std::string& format,
+                            zeek::byte_buffer& buf) override {
+        return true;
+    }
+    bool DoPublishEvent(const std::string& topic, const std::string& format, const zeek::byte_buffer& buf) override {
+        return true;
+    };
+    bool DoSubscribe(const std::string& topic_prefix, SubscribeCallback cb) override { return true; };
+    bool DoUnsubscribe(const std::string& topic_prefix) override { return true; };
+
+public:
+    NoneBackend(std::unique_ptr<EventSerializer> es, std::unique_ptr<LogSerializer> ls,
+                std::unique_ptr<detail::EventHandlingStrategy> ehs)
+        : Backend("None", std::move(es), std::move(ls), std::move(ehs)) {}
+
+    static std::unique_ptr<Backend> Instantiate(std::unique_ptr<EventSerializer> es, std::unique_ptr<LogSerializer> ls,
+                                                std::unique_ptr<detail::EventHandlingStrategy> ehs) {
+        return std::make_unique<NoneBackend>(std::move(es), std::move(ls), std::move(ehs));
+    }
+};
+} // namespace
+
+
+namespace zeek::plugin::Zeek_Cluster_None {
+
+class Plugin : public zeek::plugin::Plugin {
+    zeek::plugin::Configuration Configure() override {
+        AddComponent(new cluster::BackendComponent("None", NoneBackend::Instantiate));
+
+        zeek::plugin::Configuration config;
+        config.name = "Zeek::Cluster_Backend_None";
+        config.description = "Cluster backend none";
+        return config;
+    }
+} plugin;
+
+} // namespace zeek::plugin::Zeek_Cluster_None
diff --git a/testing/btest/Baseline/broker.remote_event/recv.recv.out b/testing/btest/Baseline/broker.remote_event/recv.recv.out
index c13ab4ea41..fcd1b41ad2 100644
--- a/testing/btest/Baseline/broker.remote_event/recv.recv.out
+++ b/testing/btest/Baseline/broker.remote_event/recv.recv.out
@@ -10,4 +10,3 @@ is_remote should be T, and is, T
 receiver got ping: my-message, 4
 is_remote should be T, and is, T
 receiver got ping: my-message, 5
-[num_peers=1, num_stores=0, num_pending_queries=0, num_events_incoming=5, num_events_outgoing=4, num_logs_incoming=0, num_logs_outgoing=1, num_ids_incoming=0, num_ids_outgoing=0]
diff --git a/testing/btest/Baseline/broker.remote_event_any/recv.recv.out b/testing/btest/Baseline/broker.remote_event_any/recv.recv.out
index c13ab4ea41..fcd1b41ad2 100644
--- a/testing/btest/Baseline/broker.remote_event_any/recv.recv.out
+++ b/testing/btest/Baseline/broker.remote_event_any/recv.recv.out
@@ -10,4 +10,3 @@ is_remote should be T, and is, T
 receiver got ping: my-message, 4
 is_remote should be T, and is, T
 receiver got ping: my-message, 5
-[num_peers=1, num_stores=0, num_pending_queries=0, num_events_incoming=5, num_events_outgoing=4, num_logs_incoming=0, num_logs_outgoing=1, num_ids_incoming=0, num_ids_outgoing=0]
diff --git a/testing/btest/Baseline/broker.remote_event_ssl_auth/recv.recv.out b/testing/btest/Baseline/broker.remote_event_ssl_auth/recv.recv.out
index 7a0dc495f2..24ee373fe9 100644
--- a/testing/btest/Baseline/broker.remote_event_ssl_auth/recv.recv.out
+++ b/testing/btest/Baseline/broker.remote_event_ssl_auth/recv.recv.out
@@ -5,4 +5,3 @@ receiver got ping: my-message, 2
 receiver got ping: my-message, 3
 receiver got ping: my-message, 4
 receiver got ping: my-message, 5
-[num_peers=1, num_stores=0, num_pending_queries=0, num_events_incoming=5, num_events_outgoing=4, num_logs_incoming=0, num_logs_outgoing=1, num_ids_incoming=0, num_ids_outgoing=0]
diff --git a/testing/btest/Baseline/coverage.bare-load-baseline/canonified_loaded_scripts.log b/testing/btest/Baseline/coverage.bare-load-baseline/canonified_loaded_scripts.log
index 92ae304ef1..bb8a7653d4 100644
--- a/testing/btest/Baseline/coverage.bare-load-baseline/canonified_loaded_scripts.log
+++ b/testing/btest/Baseline/coverage.bare-load-baseline/canonified_loaded_scripts.log
@@ -123,6 +123,9 @@ scripts/base/init-frameworks-and-bifs.zeek
   scripts/base/frameworks/supervisor/__load__.zeek
     scripts/base/frameworks/supervisor/control.zeek
     scripts/base/frameworks/supervisor/main.zeek
+      scripts/base/frameworks/cluster/pubsub.zeek
+        scripts/base/frameworks/cluster/types.zeek
+        build/scripts/base/bif/cluster.bif.zeek
   scripts/base/frameworks/input/__load__.zeek
     scripts/base/frameworks/input/main.zeek
       build/scripts/base/bif/input.bif.zeek
@@ -136,7 +139,6 @@ scripts/base/init-frameworks-and-bifs.zeek
     scripts/base/frameworks/cluster/main.zeek
       scripts/base/frameworks/control/__load__.zeek
         scripts/base/frameworks/control/main.zeek
-      build/scripts/base/bif/cluster.bif.zeek
       build/scripts/base/bif/plugins/Zeek_Cluster_WebSocket.events.bif.zeek
     scripts/base/frameworks/cluster/pools.zeek
       scripts/base/utils/hash_hrw.zeek
diff --git a/testing/btest/Baseline/coverage.bare-mode-errors/errors b/testing/btest/Baseline/coverage.bare-mode-errors/errors
index b1bb951e92..5ed62ac0af 100644
--- a/testing/btest/Baseline/coverage.bare-mode-errors/errors
+++ b/testing/btest/Baseline/coverage.bare-mode-errors/errors
@@ -1,2 +1,3 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
 ### NOTE: This file has been sorted with diff-sort.
+warning in <...>/setup-connections.zeek, line 1: deprecated script loaded from command line arguments "Remove in v9.1: Load base<...>/setup-subscriptions instead"
diff --git a/testing/btest/Baseline/coverage.default-load-baseline/canonified_loaded_scripts.log b/testing/btest/Baseline/coverage.default-load-baseline/canonified_loaded_scripts.log
index 8d2b58f0e1..bdc4807cdf 100644
--- a/testing/btest/Baseline/coverage.default-load-baseline/canonified_loaded_scripts.log
+++ b/testing/btest/Baseline/coverage.default-load-baseline/canonified_loaded_scripts.log
@@ -123,6 +123,9 @@ scripts/base/init-frameworks-and-bifs.zeek
   scripts/base/frameworks/supervisor/__load__.zeek
     scripts/base/frameworks/supervisor/control.zeek
     scripts/base/frameworks/supervisor/main.zeek
+      scripts/base/frameworks/cluster/pubsub.zeek
+        scripts/base/frameworks/cluster/types.zeek
+        build/scripts/base/bif/cluster.bif.zeek
   scripts/base/frameworks/input/__load__.zeek
     scripts/base/frameworks/input/main.zeek
       build/scripts/base/bif/input.bif.zeek
@@ -136,7 +139,6 @@ scripts/base/init-frameworks-and-bifs.zeek
     scripts/base/frameworks/cluster/main.zeek
       scripts/base/frameworks/control/__load__.zeek
         scripts/base/frameworks/control/main.zeek
-      build/scripts/base/bif/cluster.bif.zeek
       build/scripts/base/bif/plugins/Zeek_Cluster_WebSocket.events.bif.zeek
     scripts/base/frameworks/cluster/pools.zeek
       scripts/base/utils/hash_hrw.zeek
diff --git a/testing/btest/Baseline/coverage.init-default/missing_loads b/testing/btest/Baseline/coverage.init-default/missing_loads
index 93af34614e..711e65bea1 100644
--- a/testing/btest/Baseline/coverage.init-default/missing_loads
+++ b/testing/btest/Baseline/coverage.init-default/missing_loads
@@ -1,12 +1,11 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
--./frameworks/cluster/broker-backpressure.zeek
 -./frameworks/cluster/broker-stores.zeek
--./frameworks/cluster/broker-telemetry.zeek
 -./frameworks/cluster/nodes/logger.zeek
 -./frameworks/cluster/nodes/manager.zeek
 -./frameworks/cluster/nodes/proxy.zeek
 -./frameworks/cluster/nodes/worker.zeek
 -./frameworks/cluster/setup-connections.zeek
+-./frameworks/cluster/setup-subscriptions.zeek
 -./frameworks/cluster/supervisor.zeek
 -./frameworks/intel/cluster.zeek
 -./frameworks/netcontrol/cluster.zeek
diff --git a/testing/btest/Baseline/plugins.hooks/output b/testing/btest/Baseline/plugins.hooks/output
index 8697db08b7..560b182567 100644
--- a/testing/btest/Baseline/plugins.hooks/output
+++ b/testing/btest/Baseline/plugins.hooks/output
@@ -18,13 +18,13 @@
 0.000000   MetaHookPost  CallFunction(Analyzer::register_for_port, <frame>, (Analyzer::ANALYZER_HTTP, 81/tcp)) -> <no result>
 0.000000   MetaHookPost  CallFunction(Analyzer::register_for_port, <frame>, (Analyzer::ANALYZER_HTTP, 8888/tcp)) -> <no result>
 0.000000   MetaHookPost  CallFunction(Analyzer::register_for_ports, <frame>, (Analyzer::ANALYZER_HTTP, {80<...>/tcp})) -> <no result>
-0.000000   MetaHookPost  CallFunction(Broker::__subscribe, <frame>, (zeek/supervisor)) -> <no result>
-0.000000   MetaHookPost  CallFunction(Broker::subscribe, <frame>, (zeek/supervisor)) -> <no result>
+0.000000   MetaHookPost  CallFunction(Cluster::__subscribe, <frame>, (zeek/supervisor)) -> <no result>
 0.000000   MetaHookPost  CallFunction(Cluster::is_enabled, <frame>, ()) -> <no result>
 0.000000   MetaHookPost  CallFunction(Cluster::is_enabled, <null>, ()) -> <no result>
 0.000000   MetaHookPost  CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/logger, node_type=Cluster::LOGGER, max_nodes=<uninitialized>, exclusive=F])) -> <no result>
 0.000000   MetaHookPost  CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/proxy, node_type=Cluster::PROXY, max_nodes=<uninitialized>, exclusive=F])) -> <no result>
 0.000000   MetaHookPost  CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/worker, node_type=Cluster::WORKER, max_nodes=<uninitialized>, exclusive=F])) -> <no result>
+0.000000   MetaHookPost  CallFunction(Cluster::subscribe, <frame>, (zeek/supervisor)) -> <no result>
 0.000000   MetaHookPost  CallFunction(Config::config_option_changed, <null>, (Site::local_nets, {64:ff9b:1::<...>/15,fc00::<...>/10,::/128,2002:ffff:ffff::/48,::1/128,fec0::/10,2002:cb00:7100::/40,2002:c633:6400::<...>/4,2002:a00::/24,100::<...>/8,2001:2::<...>/12,2002:c000:200::/40,2002:f000::/20,2002:7f00::/24,2001::/23,2002:6440::/26,2002:c000::<...>/16,2002:ac10::/28,2002:a9fe::<...>/16,2002:c612::/31,2002::/24,fe80::/10,2001:db8::/32,2002:ef00::<...>/24,2002:e000::/40,2002:c0a8::<...>/24}, <skip-config-log>)) -> <no result>
 0.000000   MetaHookPost  CallFunction(Files::register_protocol, <frame>, (Analyzer::ANALYZER_HTTP, [get_file_handle=HTTP::get_file_handle: function(c:connection, is_orig:bool) : string{ if (!HTTP::c?$http) return ()if (HTTP::c$http$range_request && !HTTP::is_orig) { return (cat(Analyzer::ANALYZER_HTTP, HTTP::is_orig, HTTP::c$id$orig_h, HTTP::build_url(HTTP::c$http)))}else{ HTTP::mime_depth = HTTP::is_orig ? HTTP::c$http$orig_mime_depth : HTTP::c$http$resp_mime_depthreturn (cat(Analyzer::ANALYZER_HTTP, HTTP::c$start_time, HTTP::is_orig, HTTP::c$http$trans_depth, HTTP::mime_depth, id_string(HTTP::c$id)))}}, describe=HTTP::describe_file: function(f:fa_file) : string{ if (HTTP::f$source != HTTP) return ()for ([HTTP::_], HTTP::c in HTTP::f$conns) { if (HTTP::c?$http) return (HTTP::build_url_http(HTTP::c$http))}return ()}])) -> <no result>
 0.000000   MetaHookPost  CallFunction(Log::__add_filter, <frame>, (Analyzer::Logging::LOG, [name=default, writer=Log::WRITER_ASCII, path=analyzer, path_func=<uninitialized>, include=<uninitialized>, exclude=<uninitialized>, log_local=T, log_remote=T, field_name_map={}, scope_sep=., ext_prefix=_, ext_func=lambda_<4692973652431675528>: function(path:string) : void, interv=0 secs, postprocessor=<uninitialized>, config={}, policy=<uninitialized>])) -> <no result>
@@ -477,6 +477,7 @@
 0.000000   MetaHookPost  LoadFile(0, ./polling, <...>/polling.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, ./pools, <...>/pools.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, ./postprocessors, <...>/postprocessors) -> -1
+0.000000   MetaHookPost  LoadFile(0, ./pubsub, <...>/pubsub.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, ./removal-hooks, <...>/removal-hooks.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, ./reporter.bif.zeek, <...>/reporter.bif.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, ./scp, <...>/scp.zeek) -> -1
@@ -582,6 +583,7 @@
 0.000000   MetaHookPost  LoadFile(0, base<...>/ppp, <...>/ppp) -> -1
 0.000000   MetaHookPost  LoadFile(0, base<...>/ppp_serial, <...>/ppp_serial) -> -1
 0.000000   MetaHookPost  LoadFile(0, base<...>/pppoe, <...>/pppoe) -> -1
+0.000000   MetaHookPost  LoadFile(0, base<...>/pubsub, <...>/pubsub.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, base<...>/removal-hooks, <...>/removal-hooks.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, base<...>/reporter.bif, <...>/reporter.bif.zeek) -> -1
 0.000000   MetaHookPost  LoadFile(0, base<...>/root, <...>/root) -> -1
@@ -793,6 +795,7 @@
 0.000000   MetaHookPost  LoadFileExtended(0, ./polling, <...>/polling.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, ./pools, <...>/pools.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, ./postprocessors, <...>/postprocessors) -> (-1, <no content>)
+0.000000   MetaHookPost  LoadFileExtended(0, ./pubsub, <...>/pubsub.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, ./removal-hooks, <...>/removal-hooks.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, ./reporter.bif.zeek, <...>/reporter.bif.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, ./scp, <...>/scp.zeek) -> (-1, <no content>)
@@ -898,6 +901,7 @@
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/ppp, <...>/ppp) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/ppp_serial, <...>/ppp_serial) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/pppoe, <...>/pppoe) -> (-1, <no content>)
+0.000000   MetaHookPost  LoadFileExtended(0, base<...>/pubsub, <...>/pubsub.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/removal-hooks, <...>/removal-hooks.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/reporter.bif, <...>/reporter.bif.zeek) -> (-1, <no content>)
 0.000000   MetaHookPost  LoadFileExtended(0, base<...>/root, <...>/root) -> (-1, <no content>)
@@ -960,13 +964,13 @@
 0.000000   MetaHookPre   CallFunction(Analyzer::register_for_port, <frame>, (Analyzer::ANALYZER_HTTP, 81/tcp))
 0.000000   MetaHookPre   CallFunction(Analyzer::register_for_port, <frame>, (Analyzer::ANALYZER_HTTP, 8888/tcp))
 0.000000   MetaHookPre   CallFunction(Analyzer::register_for_ports, <frame>, (Analyzer::ANALYZER_HTTP, {80<...>/tcp}))
-0.000000   MetaHookPre   CallFunction(Broker::__subscribe, <frame>, (zeek/supervisor))
-0.000000   MetaHookPre   CallFunction(Broker::subscribe, <frame>, (zeek/supervisor))
+0.000000   MetaHookPre   CallFunction(Cluster::__subscribe, <frame>, (zeek/supervisor))
 0.000000   MetaHookPre   CallFunction(Cluster::is_enabled, <frame>, ())
 0.000000   MetaHookPre   CallFunction(Cluster::is_enabled, <null>, ())
 0.000000   MetaHookPre   CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/logger, node_type=Cluster::LOGGER, max_nodes=<uninitialized>, exclusive=F]))
 0.000000   MetaHookPre   CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/proxy, node_type=Cluster::PROXY, max_nodes=<uninitialized>, exclusive=F]))
 0.000000   MetaHookPre   CallFunction(Cluster::register_pool, <frame>, ([topic=zeek<...>/worker, node_type=Cluster::WORKER, max_nodes=<uninitialized>, exclusive=F]))
+0.000000   MetaHookPre   CallFunction(Cluster::subscribe, <frame>, (zeek/supervisor))
 0.000000   MetaHookPre   CallFunction(Config::config_option_changed, <null>, (Site::local_nets, {64:ff9b:1::<...>/15,fc00::<...>/10,::/128,2002:ffff:ffff::/48,::1/128,fec0::/10,2002:cb00:7100::/40,2002:c633:6400::<...>/4,2002:a00::/24,100::<...>/8,2001:2::<...>/12,2002:c000:200::/40,2002:f000::/20,2002:7f00::/24,2001::/23,2002:6440::/26,2002:c000::<...>/16,2002:ac10::/28,2002:a9fe::<...>/16,2002:c612::/31,2002::/24,fe80::/10,2001:db8::/32,2002:ef00::<...>/24,2002:e000::/40,2002:c0a8::<...>/24}, <skip-config-log>))
 0.000000   MetaHookPre   CallFunction(Files::register_protocol, <frame>, (Analyzer::ANALYZER_HTTP, [get_file_handle=HTTP::get_file_handle: function(c:connection, is_orig:bool) : string{ if (!HTTP::c?$http) return ()if (HTTP::c$http$range_request && !HTTP::is_orig) { return (cat(Analyzer::ANALYZER_HTTP, HTTP::is_orig, HTTP::c$id$orig_h, HTTP::build_url(HTTP::c$http)))}else{ HTTP::mime_depth = HTTP::is_orig ? HTTP::c$http$orig_mime_depth : HTTP::c$http$resp_mime_depthreturn (cat(Analyzer::ANALYZER_HTTP, HTTP::c$start_time, HTTP::is_orig, HTTP::c$http$trans_depth, HTTP::mime_depth, id_string(HTTP::c$id)))}}, describe=HTTP::describe_file: function(f:fa_file) : string{ if (HTTP::f$source != HTTP) return ()for ([HTTP::_], HTTP::c in HTTP::f$conns) { if (HTTP::c?$http) return (HTTP::build_url_http(HTTP::c$http))}return ()}]))
 0.000000   MetaHookPre   CallFunction(Log::__add_filter, <frame>, (Analyzer::Logging::LOG, [name=default, writer=Log::WRITER_ASCII, path=analyzer, path_func=<uninitialized>, include=<uninitialized>, exclude=<uninitialized>, log_local=T, log_remote=T, field_name_map={}, scope_sep=., ext_prefix=_, ext_func=lambda_<4692973652431675528>: function(path:string) : void, interv=0 secs, postprocessor=<uninitialized>, config={}, policy=<uninitialized>]))
@@ -1419,6 +1423,7 @@
 0.000000   MetaHookPre   LoadFile(0, ./polling, <...>/polling.zeek)
 0.000000   MetaHookPre   LoadFile(0, ./pools, <...>/pools.zeek)
 0.000000   MetaHookPre   LoadFile(0, ./postprocessors, <...>/postprocessors)
+0.000000   MetaHookPre   LoadFile(0, ./pubsub, <...>/pubsub.zeek)
 0.000000   MetaHookPre   LoadFile(0, ./removal-hooks, <...>/removal-hooks.zeek)
 0.000000   MetaHookPre   LoadFile(0, ./reporter.bif.zeek, <...>/reporter.bif.zeek)
 0.000000   MetaHookPre   LoadFile(0, ./scp, <...>/scp.zeek)
@@ -1524,6 +1529,7 @@
 0.000000   MetaHookPre   LoadFile(0, base<...>/ppp, <...>/ppp)
 0.000000   MetaHookPre   LoadFile(0, base<...>/ppp_serial, <...>/ppp_serial)
 0.000000   MetaHookPre   LoadFile(0, base<...>/pppoe, <...>/pppoe)
+0.000000   MetaHookPre   LoadFile(0, base<...>/pubsub, <...>/pubsub.zeek)
 0.000000   MetaHookPre   LoadFile(0, base<...>/removal-hooks, <...>/removal-hooks.zeek)
 0.000000   MetaHookPre   LoadFile(0, base<...>/reporter.bif, <...>/reporter.bif.zeek)
 0.000000   MetaHookPre   LoadFile(0, base<...>/root, <...>/root)
@@ -1735,6 +1741,7 @@
 0.000000   MetaHookPre   LoadFileExtended(0, ./polling, <...>/polling.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, ./pools, <...>/pools.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, ./postprocessors, <...>/postprocessors)
+0.000000   MetaHookPre   LoadFileExtended(0, ./pubsub, <...>/pubsub.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, ./removal-hooks, <...>/removal-hooks.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, ./reporter.bif.zeek, <...>/reporter.bif.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, ./scp, <...>/scp.zeek)
@@ -1840,6 +1847,7 @@
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/ppp, <...>/ppp)
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/ppp_serial, <...>/ppp_serial)
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/pppoe, <...>/pppoe)
+0.000000   MetaHookPre   LoadFileExtended(0, base<...>/pubsub, <...>/pubsub.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/removal-hooks, <...>/removal-hooks.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/reporter.bif, <...>/reporter.bif.zeek)
 0.000000   MetaHookPre   LoadFileExtended(0, base<...>/root, <...>/root)
@@ -1902,12 +1910,12 @@
 0.000000 | HookCallFunction Analyzer::register_for_port(Analyzer::ANALYZER_HTTP, 81/tcp)
 0.000000 | HookCallFunction Analyzer::register_for_port(Analyzer::ANALYZER_HTTP, 8888/tcp)
 0.000000 | HookCallFunction Analyzer::register_for_ports(Analyzer::ANALYZER_HTTP, {80<...>/tcp})
-0.000000 | HookCallFunction Broker::__subscribe(zeek/supervisor)
-0.000000 | HookCallFunction Broker::subscribe(zeek/supervisor)
+0.000000 | HookCallFunction Cluster::__subscribe(zeek/supervisor)
 0.000000 | HookCallFunction Cluster::is_enabled()
 0.000000 | HookCallFunction Cluster::register_pool([topic=zeek<...>/logger, node_type=Cluster::LOGGER, max_nodes=<uninitialized>, exclusive=F])
 0.000000 | HookCallFunction Cluster::register_pool([topic=zeek<...>/proxy, node_type=Cluster::PROXY, max_nodes=<uninitialized>, exclusive=F])
 0.000000 | HookCallFunction Cluster::register_pool([topic=zeek<...>/worker, node_type=Cluster::WORKER, max_nodes=<uninitialized>, exclusive=F])
+0.000000 | HookCallFunction Cluster::subscribe(zeek/supervisor)
 0.000000 | HookCallFunction Config::config_option_changed(Site::local_nets, {64:ff9b:1::<...>/15,fc00::<...>/10,::/128,2002:ffff:ffff::/48,::1/128,fec0::/10,2002:cb00:7100::/40,2002:c633:6400::<...>/4,2002:a00::/24,100::<...>/8,2001:2::<...>/12,2002:c000:200::/40,2002:f000::/20,2002:7f00::/24,2001::/23,2002:6440::/26,2002:c000::<...>/16,2002:ac10::/28,2002:a9fe::<...>/16,2002:c612::/31,2002::/24,fe80::/10,2001:db8::/32,2002:ef00::<...>/24,2002:e000::/40,2002:c0a8::<...>/24}, <skip-config-log>)
 0.000000 | HookCallFunction Files::register_protocol(Analyzer::ANALYZER_HTTP, [get_file_handle=HTTP::get_file_handle: function(c:connection, is_orig:bool) : string{ if (!HTTP::c?$http) return ()if (HTTP::c$http$range_request && !HTTP::is_orig) { return (cat(Analyzer::ANALYZER_HTTP, HTTP::is_orig, HTTP::c$id$orig_h, HTTP::build_url(HTTP::c$http)))}else{ HTTP::mime_depth = HTTP::is_orig ? HTTP::c$http$orig_mime_depth : HTTP::c$http$resp_mime_depthreturn (cat(Analyzer::ANALYZER_HTTP, HTTP::c$start_time, HTTP::is_orig, HTTP::c$http$trans_depth, HTTP::mime_depth, id_string(HTTP::c$id)))}}, describe=HTTP::describe_file: function(f:fa_file) : string{ if (HTTP::f$source != HTTP) return ()for ([HTTP::_], HTTP::c in HTTP::f$conns) { if (HTTP::c?$http) return (HTTP::build_url_http(HTTP::c$http))}return ()}])
 0.000000 | HookCallFunction Log::__add_filter(Analyzer::Logging::LOG, [name=default, writer=Log::WRITER_ASCII, path=analyzer, path_func=<uninitialized>, include=<uninitialized>, exclude=<uninitialized>, log_local=T, log_remote=T, field_name_map={}, scope_sep=., ext_prefix=_, ext_func=lambda_<4692973652431675528>: function(path:string) : void, interv=0 secs, postprocessor=<uninitialized>, config={}, policy=<uninitialized>])
@@ -2371,6 +2379,7 @@
 0.000000 | HookLoadFile  ./pools <...>/pools.zeek
 0.000000 | HookLoadFile  ./postprocessors <...>/postprocessors
 0.000000 | HookLoadFile  ./programming <...>/programming.sig
+0.000000 | HookLoadFile  ./pubsub <...>/pubsub.zeek
 0.000000 | HookLoadFile  ./python <...>/python.sig
 0.000000 | HookLoadFile  ./removal-hooks <...>/removal-hooks.zeek
 0.000000 | HookLoadFile  ./reporter.bif.zeek <...>/reporter.bif.zeek
@@ -2478,6 +2487,7 @@
 0.000000 | HookLoadFile  base<...>/ppp <...>/ppp
 0.000000 | HookLoadFile  base<...>/ppp_serial <...>/ppp_serial
 0.000000 | HookLoadFile  base<...>/pppoe <...>/pppoe
+0.000000 | HookLoadFile  base<...>/pubsub <...>/pubsub.zeek
 0.000000 | HookLoadFile  base<...>/removal-hooks <...>/removal-hooks.zeek
 0.000000 | HookLoadFile  base<...>/reporter.bif <...>/reporter.bif.zeek
 0.000000 | HookLoadFile  base<...>/root <...>/root
@@ -2687,6 +2697,7 @@
 0.000000 | HookLoadFileExtended ./pools <...>/pools.zeek
 0.000000 | HookLoadFileExtended ./postprocessors <...>/postprocessors
 0.000000 | HookLoadFileExtended ./programming <...>/programming.sig
+0.000000 | HookLoadFileExtended ./pubsub <...>/pubsub.zeek
 0.000000 | HookLoadFileExtended ./python <...>/python.sig
 0.000000 | HookLoadFileExtended ./removal-hooks <...>/removal-hooks.zeek
 0.000000 | HookLoadFileExtended ./reporter.bif.zeek <...>/reporter.bif.zeek
@@ -2794,6 +2805,7 @@
 0.000000 | HookLoadFileExtended base<...>/ppp <...>/ppp
 0.000000 | HookLoadFileExtended base<...>/ppp_serial <...>/ppp_serial
 0.000000 | HookLoadFileExtended base<...>/pppoe <...>/pppoe
+0.000000 | HookLoadFileExtended base<...>/pubsub <...>/pubsub.zeek
 0.000000 | HookLoadFileExtended base<...>/removal-hooks <...>/removal-hooks.zeek
 0.000000 | HookLoadFileExtended base<...>/reporter.bif <...>/reporter.bif.zeek
 0.000000 | HookLoadFileExtended base<...>/root <...>/root
diff --git a/testing/btest/Files/broker/cluster-layout.zeek b/testing/btest/Files/broker/cluster-layout.zeek
index f495e8da29..d8cc306386 100644
--- a/testing/btest/Files/broker/cluster-layout.zeek
+++ b/testing/btest/Files/broker/cluster-layout.zeek
@@ -19,6 +19,12 @@
 # to Cluster::nodes.
 
 
+# Using this testing cluster-layout.zeek switches Zeek to use Broker.
+#
+# This is side-loaded here to keep all existing tests that rely on
+# this Broker testing cluster setup to continue working.
+@load frameworks/cluster/backend/broker
+
 # Redef'ed to F if logger-1 or logger-2 are active.
 redef Cluster::manager_is_logger = T;
 
diff --git a/testing/btest/Files/zeromq/metrics.zeek b/testing/btest/Files/zeromq/metrics.zeek
index 0812e4659e..40c26d69f1 100644
--- a/testing/btest/Files/zeromq/metrics.zeek
+++ b/testing/btest/Files/zeromq/metrics.zeek
@@ -1,3 +1,5 @@
+@load base/frameworks/telemetry
+
 module Cluster::Backend::ZeroMQ;
 
 export {
diff --git a/testing/btest/broker/remote_event.zeek b/testing/btest/broker/remote_event.zeek
index de44ae87cd..823c9b06dc 100644
--- a/testing/btest/broker/remote_event.zeek
+++ b/testing/btest/broker/remote_event.zeek
@@ -1,7 +1,5 @@
 # @TEST-GROUP: broker
 #
-# @TEST-REQUIRES: $SCRIPTS/have-spicy  # The logging of Broker's `num_logs_outgoing` depends on whether the Spicy plugin is loaded or not.
-#
 # @TEST-PORT: BROKER_PORT
 #
 # @TEST-EXEC: btest-bg-run recv "zeek -b ../recv.zeek >recv.out"
@@ -98,10 +96,4 @@ event ping(msg: string, n: count)
         local e = Broker::make_event(pong, msg, n);
         Broker::publish("zeek/event/my_topic", e);
         }
-
-event zeek_done()
-	{
-	print get_broker_stats();
-	}
-
 # @TEST-END-FILE
diff --git a/testing/btest/broker/remote_event_any.zeek b/testing/btest/broker/remote_event_any.zeek
index 8bd37a36a5..c578cb7073 100644
--- a/testing/btest/broker/remote_event_any.zeek
+++ b/testing/btest/broker/remote_event_any.zeek
@@ -1,7 +1,5 @@
 # @TEST-GROUP: broker
 #
-# @TEST-REQUIRES: $SCRIPTS/have-spicy  # The logging of Broker's `num_logs_outgoing` depends on whether the Spicy plugin is loaded or not.
-#
 # @TEST-PORT: BROKER_PORT
 #
 # @TEST-EXEC: btest-bg-run recv "zeek -b ../recv.zeek >recv.out"
@@ -106,10 +104,4 @@ event ping(msg: string, n: any)
 			# internals should not wrap n into another Broker::Data record
 			Broker::publish("zeek/event/my_topic", pong, msg, n);
         }
-
-event zeek_done()
-	{
-	print get_broker_stats();
-	}
-
 # @TEST-END-FILE
diff --git a/testing/btest/broker/remote_event_ssl_auth.zeek b/testing/btest/broker/remote_event_ssl_auth.zeek
index cc4b052607..b8cd97a806 100644
--- a/testing/btest/broker/remote_event_ssl_auth.zeek
+++ b/testing/btest/broker/remote_event_ssl_auth.zeek
@@ -1,7 +1,5 @@
 # @TEST-GROUP: broker
 #
-# @TEST-REQUIRES: $SCRIPTS/have-spicy  # The logging of Broker's `num_logs_outgoing` depends on whether the Spicy plugin is loaded or not.
-#
 # @TEST-PORT: BROKER_PORT
 #
 # @TEST-EXEC: btest-bg-run recv "zeek -b ../recv.zeek >recv.out"
@@ -235,10 +233,4 @@ event ping(msg: string, n: count)
         local e = Broker::make_event(pong, msg, n);
         Broker::publish("zeek/event/my_topic", e);
         }
-
-event zeek_done()
-	{
-	print get_broker_stats();
-	}
-
 # @TEST-END-FILE
diff --git a/testing/btest/broker/remote_event_ts_compat.zeek b/testing/btest/broker/remote_event_ts_compat.zeek
index 36a00a74c9..ec71d07272 100644
--- a/testing/btest/broker/remote_event_ts_compat.zeek
+++ b/testing/btest/broker/remote_event_ts_compat.zeek
@@ -7,8 +7,7 @@
 # @TEST-REQUIRES: TOPIC=/zeek/my_topic python3 client.py check
 #
 # @TEST-EXEC: TOPIC=/zeek/my_topic btest-bg-run server "zeek %INPUT >output"
-# Leave room for Zeek to start up, which can be slow when using -O ZAM
-# @TEST-EXEC: sleep 15
+# @TEST-EXEC: wait-for-file server/ready 20
 # @TEST-EXEC: TOPIC=/zeek/my_topic btest-bg-run client "python3 ../client.py >output"
 #
 # @TEST-EXEC: btest-bg-wait 45
@@ -29,6 +28,8 @@ event zeek_init()
 	Broker::subscribe(getenv("TOPIC"));
 	Broker::listen("127.0.0.1", to_port(getenv("BROKER_PORT")));
 	set_network_time(double_to_time(42.0));
+
+	system("touch ready");
 	}
 
 event Broker::peer_added(endpoint: Broker::EndpointInfo, msg: string)
diff --git a/testing/btest/broker/remote_log.zeek b/testing/btest/broker/remote_log.zeek
index 9a030b2d9e..c3f0cc9303 100644
--- a/testing/btest/broker/remote_log.zeek
+++ b/testing/btest/broker/remote_log.zeek
@@ -13,6 +13,9 @@
 
 # @TEST-START-FILE common.zeek
 
+# Relies on Cluster::backend being properly set for logging.
+@load frameworks/cluster/backend/broker
+
 redef exit_only_after_terminate = T;
 
 module Test;
diff --git a/testing/btest/broker/remote_log_batch.zeek b/testing/btest/broker/remote_log_batch.zeek
index d0f3b44ce8..f8b2694bb2 100644
--- a/testing/btest/broker/remote_log_batch.zeek
+++ b/testing/btest/broker/remote_log_batch.zeek
@@ -13,6 +13,9 @@
 
 # @TEST-START-FILE common.zeek
 
+# Relies on Cluster::backend being properly set for logging.
+@load frameworks/cluster/backend/broker
+
 redef exit_only_after_terminate = T;
 
 module Test;
diff --git a/testing/btest/broker/remote_log_late_join.zeek b/testing/btest/broker/remote_log_late_join.zeek
index bc5660f424..294605385e 100644
--- a/testing/btest/broker/remote_log_late_join.zeek
+++ b/testing/btest/broker/remote_log_late_join.zeek
@@ -13,6 +13,9 @@
 
 # @TEST-START-FILE common.zeek
 
+# Relies on Cluster::backend being properly set for logging.
+@load frameworks/cluster/backend/broker
+
 redef exit_only_after_terminate = T;
 
 module Test;
diff --git a/testing/btest/broker/remote_log_types.zeek b/testing/btest/broker/remote_log_types.zeek
index cb4e74251c..1817fe4cf6 100644
--- a/testing/btest/broker/remote_log_types.zeek
+++ b/testing/btest/broker/remote_log_types.zeek
@@ -16,6 +16,9 @@
 
 # @TEST-START-FILE common.zeek
 
+# Relies on Cluster::backend being properly set for logging.
+@load frameworks/cluster/backend/broker
+
 redef exit_only_after_terminate = T;
 
 global quit_receiver: event();
diff --git a/testing/btest/cluster/generic/cluster-publish-errors.zeek b/testing/btest/cluster/generic/cluster-publish-errors.zeek
index 5e106012a0..25cc5cd733 100644
--- a/testing/btest/cluster/generic/cluster-publish-errors.zeek
+++ b/testing/btest/cluster/generic/cluster-publish-errors.zeek
@@ -1,7 +1,7 @@
 # @TEST-DOC: Test errors of cluster bifs
 #
 # @TEST-EXEC: zeek --parse-only -b %INPUT
-# @TEST-EXEC: zeek -b %INPUT
+# @TEST-EXEC: zeek -b %INPUT frameworks/cluster/backend/broker
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff .stderr
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff .stdout
 
diff --git a/testing/btest/cluster/websocket/terminate-while-queuing.zeek b/testing/btest/cluster/websocket/terminate-while-queuing.zeek
index 787f02671a..1a057ec983 100644
--- a/testing/btest/cluster/websocket/terminate-while-queuing.zeek
+++ b/testing/btest/cluster/websocket/terminate-while-queuing.zeek
@@ -19,6 +19,9 @@
 # @TEST-EXEC: btest-diff ./client/.stderr
 
 # @TEST-START-FILE manager.zeek
+
+@load frameworks/cluster/backend/broker
+
 redef exit_only_after_terminate = T;
 
 # Force dispatcher queue being full quickly!
diff --git a/testing/btest/core/suspend_processing/websocket.zeek b/testing/btest/core/suspend_processing/websocket.zeek
index 631d57dd95..4201014673 100644
--- a/testing/btest/core/suspend_processing/websocket.zeek
+++ b/testing/btest/core/suspend_processing/websocket.zeek
@@ -15,6 +15,8 @@
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff worker/.stdout
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff client/.stdout
 
+@load frameworks/cluster/backend/broker
+
 global my_new_connection: event(uid: string, c: count);
 
 event zeek_init()
diff --git a/testing/btest/plugins/publish-event-hook.zeek b/testing/btest/plugins/publish-event-hook.zeek
index 704a1ccc59..c5efda7caa 100644
--- a/testing/btest/plugins/publish-event-hook.zeek
+++ b/testing/btest/plugins/publish-event-hook.zeek
@@ -4,8 +4,9 @@
 # @TEST-EXEC: ZEEK_PLUGIN_PATH=`pwd` zeek -b Demo::PublishEvent %INPUT > output
 # @TEST-EXEC: btest-diff output
 
-redef allow_network_time_forward = F;
+@load frameworks/cluster/backend/broker
 
+redef allow_network_time_forward = F;
 
 module App;
 
diff --git a/testing/btest/scripts/base/frameworks/control/configuration_update.zeek b/testing/btest/scripts/base/frameworks/control/configuration_update.zeek
index d2507f7ee3..2afe60c0a8 100644
--- a/testing/btest/scripts/base/frameworks/control/configuration_update.zeek
+++ b/testing/btest/scripts/base/frameworks/control/configuration_update.zeek
@@ -5,6 +5,8 @@
 # @TEST-EXEC: btest-bg-wait 30
 # @TEST-EXEC: btest-diff controllee/.stdout
 
+@load frameworks/cluster/backend/broker
+
 @load base/frameworks/control
 
 const test_var = "ORIGINAL VALUE (this should be printed out first)" &redef;
diff --git a/testing/btest/scripts/base/frameworks/control/id_value.zeek b/testing/btest/scripts/base/frameworks/control/id_value.zeek
index c12d137c6a..33e8b525cf 100644
--- a/testing/btest/scripts/base/frameworks/control/id_value.zeek
+++ b/testing/btest/scripts/base/frameworks/control/id_value.zeek
@@ -9,6 +9,8 @@
 # @TEST-EXEC: btest-bg-wait 30
 # @TEST-EXEC: btest-diff controller/.stdout
 
+@load frameworks/cluster/backend/broker
+
 @load base/frameworks/control
 
 # This value shouldn't ever be printed to the controllers stdout.
diff --git a/testing/btest/scripts/base/frameworks/control/shutdown.zeek b/testing/btest/scripts/base/frameworks/control/shutdown.zeek
index 832ca8a591..3741cf98df 100644
--- a/testing/btest/scripts/base/frameworks/control/shutdown.zeek
+++ b/testing/btest/scripts/base/frameworks/control/shutdown.zeek
@@ -4,3 +4,5 @@
 # @TEST-EXEC: btest-bg-run controller ZEEKPATH=$ZEEKPATH:.. zeek -b %INPUT frameworks/control/controller Control::host=127.0.0.1 Control::host_port=$BROKER_PORT Control::cmd=shutdown
 # @TEST-EXEC: btest-bg-wait 20
 
+@load frameworks/cluster/backend/broker
+
diff --git a/testing/btest/scripts/base/frameworks/logging/length-checking.zeek b/testing/btest/scripts/base/frameworks/logging/length-checking.zeek
index 95e966c3d6..cee6e8cc25 100644
--- a/testing/btest/scripts/base/frameworks/logging/length-checking.zeek
+++ b/testing/btest/scripts/base/frameworks/logging/length-checking.zeek
@@ -17,6 +17,9 @@
 # @TEST-START-FILE common.zeek
 @load base/frameworks/notice/weird
 
+# Ensure logging is done via Broker
+@load frameworks/cluster/backend/broker
+
 module Test;
 
 # Disable the string and container length filtering.
diff --git a/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_manager.zeek b/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_manager.zeek
index fcc9f7e3e9..a762121483 100644
--- a/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_manager.zeek
+++ b/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_manager.zeek
@@ -12,6 +12,7 @@
 # @TEST-EXEC: btest-diff zeek/worker-1/stdout
 # @TEST-EXEC: btest-diff zeek/proxy-1/stdout
 
+@load frameworks/cluster/backend/broker
 @load policy/frameworks/cluster/experimental
 
 # So the supervised node doesn't terminate right away.
diff --git a/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_worker.zeek b/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_worker.zeek
index 457d34db11..112559c10c 100644
--- a/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_worker.zeek
+++ b/testing/btest/scripts/policy/frameworks/cluster/cluster_started_restart_worker.zeek
@@ -13,6 +13,7 @@
 # @TEST-EXEC: btest-diff zeek/worker-2/stdout
 # @TEST-EXEC: btest-diff zeek/proxy-1/stdout
 
+@load frameworks/cluster/backend/broker
 @load policy/frameworks/cluster/experimental
 
 # So the supervised node doesn't terminate right away.
diff --git a/testing/btest/scripts/policy/frameworks/management/controller/agent-checkin.zeek b/testing/btest/scripts/policy/frameworks/management/controller/agent-checkin.zeek
index 26f049a6e6..c441f0a9e5 100644
--- a/testing/btest/scripts/policy/frameworks/management/controller/agent-checkin.zeek
+++ b/testing/btest/scripts/policy/frameworks/management/controller/agent-checkin.zeek
@@ -11,6 +11,7 @@
 # @TEST-EXEC: btest-bg-wait 10
 # @TEST-EXEC: btest-diff zeek/nodes/controller/stdout
 
+@load policy/frameworks/cluster/backend/broker
 @load policy/frameworks/management/agent
 @load policy/frameworks/management/controller
 
diff --git a/testing/btest/scripts/policy/frameworks/telemetry/prometheus.zeek b/testing/btest/scripts/policy/frameworks/telemetry/prometheus.zeek
index 9b09784e1f..aeef3df959 100644
--- a/testing/btest/scripts/policy/frameworks/telemetry/prometheus.zeek
+++ b/testing/btest/scripts/policy/frameworks/telemetry/prometheus.zeek
@@ -55,6 +55,7 @@ for host in $(echo ${services_data} | jq -r '.[0].targets[]' | sort); do
 done
 # @TEST-END-FILE
 
+@load policy/frameworks/cluster/backend/broker
 @load policy/frameworks/cluster/experimental
 @load base/frameworks/telemetry
 
diff --git a/testing/btest/supervisor/config-cluster.zeek b/testing/btest/supervisor/config-cluster.zeek
index f551ec5044..ebdaaf7019 100644
--- a/testing/btest/supervisor/config-cluster.zeek
+++ b/testing/btest/supervisor/config-cluster.zeek
@@ -11,6 +11,7 @@
 # @TEST-EXEC: btest-diff zeek/worker-1/stdout
 # @TEST-EXEC: btest-diff zeek/proxy-1/stdout
 
+@load policy/frameworks/cluster/backend/broker
 @load policy/frameworks/cluster/experimental
 
 # So the supervised node doesn't terminate right away.