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Add Supervisor::node_status notification event

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The Supervisor generates this event every time it receives a status update from
the stem, meaning a node got created or re-created. A corresponding
SupervisorControl::node_status event relays the same information for users
interacting with the Supervisor over Broker.
This commit is contained in:
Christian Kreibich 2022-05-30 12:41:39 -07:00
parent bdfa7e70f5
commit 14188fc7a7
9 changed files with 98 additions and 0 deletions
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47
testing/btest/supervisor/node_status.zeek Normal file
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# This test verifies that the Supervisor triggers Supervisor::node_status
# events when the stem (re)creates nodes.
#
# @TEST-EXEC: btest-bg-run zeek zeek -j -b %INPUT
# @TEST-EXEC: btest-bg-wait 30
# @TEST-EXEC: btest-diff zeek/.stdout
# So the supervised node doesn't terminate right away.
redef exit_only_after_terminate=T;
global status_count = 0;
global check_interval = 0.1sec;
event Supervisor::node_status(node: string, pid: count)
{
# We handle this once for the initial node creation, once for the
# restart, then quit.
if ( ++status_count == 2)
terminate();
print "got node_status event", node;
# The status update has a PID for the new node, so checking node status
# now should report a matching PID. This will output only in case the
# PIDs do not match, failing the test.
local s = Supervisor::status(node);
local ns = s$nodes["grault"];
if ( ! ns$pid )
print "pid unavailable via Supervisor::status()", pid;
else if ( ns$pid != pid )
print "pid mismatch", ns$pid, pid;
Supervisor::restart("grault");
}
event zeek_init()
{
if ( Supervisor::is_supervisor() )
{
local sn = Supervisor::NodeConfig($name="grault");
local res = Supervisor::create(sn);
if ( res != "" )
print "failed to create node", res;
}
}