zeek/testing/btest/scripts/base/frameworks/telemetry/sync.zeek
2025-04-17 16:30:23 +02:00

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# @TEST-DOC: Verify Telemetry::sync() is invoked for metric scraping via the Prometheus HTTP endpoint.
# Not compilable to C++ due to globals being initialized to a record that
# has an opaque type as a field.
# @TEST-REQUIRES: test "${ZEEK_USE_CPP}" != "1"
# @TEST-REQUIRES: which jq
# @TEST-REQUIRES: which curl
#
# @TEST-PORT: METRICS_PORT
#
# @TEST-EXEC: chmod +x fetch-metrics.sh
# @TEST-EXEC: zeek --parse-only %INPUT
# @TEST-EXEC: btest-bg-run zeek ZEEKPATH=$ZEEKPATH:.. zeek -b %INPUT
# @TEST-EXEC: $SCRIPTS/wait-for-file zeek/up 5 || (btest-bg-wait -k 1 && false)
# @TEST-EXEC: ./fetch-metrics.sh 1.trace metrics1.txt
# @TEST-EXEC: ./fetch-metrics.sh 2.trace metrics2.txt
# @TEST-EXEC: ./fetch-metrics.sh 3.trace metrics3.txt
# @TEST-EXEC: btest-bg-wait 10
#
# @TEST-EXEC: btest-diff zeek/.stdout
# @TEST-EXEC: btest-diff metrics1.txt
# @TEST-EXEC: btest-diff metrics2.txt
# @TEST-EXEC: btest-diff metrics3.txt
# @TEST-START-FILE fetch-metrics.sh
#! /usr/bin/env bash
set -ux
trace_file=$1
output_file=$2
PORT=$(echo ${METRICS_PORT} | cut -d '/' -f 1)
URL=http://localhost:${PORT}/metrics
curl -m 5 --trace $trace_file $URL | grep ^btest > $output_file
exit 0
# @TEST-END-FILE
@load base/frameworks/telemetry
redef exit_only_after_terminate = T;
redef Telemetry::metrics_port = to_port(getenv("METRICS_PORT"));
event zeek_init()
{
print "node up";
system("touch up");
}
global connections_by_proto_cf = Telemetry::register_counter_family([
$prefix="btest",
$name="connections",
$unit="",
$help_text="Total number of monitored connections",
$label_names=vector("proto")
]);
global sync_calls = 0;
hook Telemetry::sync()
{
++sync_calls;
local proto = sync_calls == 1 ? "tcp" : "udp";
print "sync", sync_calls, proto;
Telemetry::counter_family_inc(connections_by_proto_cf, vector(proto));
if ( sync_calls == 3 )
terminate();
}