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- This gives the cluster controller and agent the common name "Management framework" and changes the start directory of the sources from "policy/frameworks/cluster" to "policy/frameworks/management". This avoids ambiguity with the existing cluster framework. - It renames the "ClusterController" and "ClusterAgent" script modules to "Management::Controller" and "Management::Agent", respectively. This allows us to anchor tooling common to both controller and agent at the "Management" module. - It moves common configuration settings, logging, requests, types, and utilities to the common "Management" module. - It removes the explicit "::Types" submodule (so a request/response result is now a Management::Result, not a Management::Types::Result), which makes typenames more readable. - It updates tests that depend on module naming and full set of scripts.
119 lines
4.3 KiB
Text
119 lines
4.3 KiB
Text
##! The event API of cluster controllers. Most endpoints consist of event pairs,
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##! where the controller answers a zeek-client request event with a
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##! corresponding response event. Such event pairs share the same name prefix
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##! and end in "_request" and "_response", respectively.
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@load policy/frameworks/management/types
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module Management::Controller::API;
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export {
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## A simple versioning scheme, used to track basic compatibility of
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## controller, agents, and zeek-client.
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const version = 1;
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## zeek-client sends this event to request a list of the currently
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## peered agents/instances.
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##
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## reqid: a request identifier string, echoed in the response event.
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##
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global get_instances_request: event(reqid: string);
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## Response to a get_instances_request event. The controller sends
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## this back to the client.
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##
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## reqid: the request identifier used in the request event.
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##
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## result: the result record. Its data member is a
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## :zeek:see:`Management::Instance` record.
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##
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global get_instances_response: event(reqid: string,
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result: Management::Result);
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## zeek-client sends this event to establish a new cluster configuration,
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## including the full cluster topology. The controller processes the update
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## and relays it to the agents. Once each has responded (or a timeout occurs)
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## the controller sends a corresponding response event back to the client.
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##
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## reqid: a request identifier string, echoed in the response event.
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##
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## config: a :zeek:see:`Management::Configuration` record
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## specifying the cluster configuration.
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##
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global set_configuration_request: event(reqid: string,
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config: Management::Configuration);
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## Response to a set_configuration_request event. The controller sends
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## this back to the client.
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##
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## reqid: the request identifier used in the request event.
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##
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## result: a vector of :zeek:see:`Management::Result` records.
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## Each member captures one agent's response.
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##
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global set_configuration_response: event(reqid: string,
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result: Management::ResultVec);
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## zeek-client sends this event to request a list of
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## :zeek:see:`Management::NodeStatus` records that capture
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## the status of Supervisor-managed nodes running on the cluster's
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## instances.
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##
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## reqid: a request identifier string, echoed in the response event.
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##
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global get_nodes_request: event(reqid: string);
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## Response to a get_nodes_request event. The controller sends this
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## back to the client.
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##
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## reqid: the request identifier used in the request event.
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##
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## result: a :zeek:type`vector` of :zeek:see:`Management::Result`
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## records. Each record covers one cluster instance. Each record's data
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## member is a vector of :zeek:see:`Management::NodeStatus`
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## records, covering the nodes at that instance. Results may also indicate
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## failure, with error messages indicating what went wrong.
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global get_nodes_response: event(reqid: string,
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result: Management::ResultVec);
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# Testing events. These don't provide operational value but expose
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# internal functionality, triggered by test cases.
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## This event causes no further action (other than getting logged) if
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## with_state is F. When T, the controller establishes request state, and
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## the controller only ever sends the response event when this state times
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## out.
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##
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## reqid: a request identifier string, echoed in the response event when
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## with_state is T.
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##
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## with_state: flag indicating whether the controller should keep (and
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## time out) request state for this request.
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##
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global test_timeout_request: event(reqid: string, with_state: bool);
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## Response to a test_timeout_request event. The controller sends this
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## back to the client if the original request had the with_state flag.
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##
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## reqid: the request identifier used in the request event.
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##
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global test_timeout_response: event(reqid: string,
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result: Management::Result);
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# Notification events, agent -> controller
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## The controller triggers this event when the operational cluster
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## instances align with the ones desired by the cluster
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## configuration. It's essentially a cluster management readiness
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## event. This event is currently only used by the controller and not
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## published to other topics.
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##
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## instances: the set of instance names now ready.
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##
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global notify_agents_ready: event(instances: set[string]);
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}
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