19740 Ship process discovery rule for the OTel Collector

Add a default process discovery rule for the otelcol process so it is
automatically monitored on Checkmk servers, and register it as a new
default rule for existing sites during update.
CMK-33090

Change-Id: I76f08832550f920e62d16dfa3354778cc5e9326d

Author: m3hransh

.werks/19740.md

@@ -0,0 +1,19 @@
+[//]: # (werk v3)
+# Ship process discovery rule for the OTel Collector
+
+key        | value
+---------- | ---
+date       | 2026-04-09T16:25:44.760655+00:00
+version    | 2.5.0b5
+class      | feature
+edition    | ultimate
+component  | wato
+level      | 1
+compatible | yes
+
+Checkmk now ships a default process discovery rule for the OpenTelemetry Collector
+process (`otelcol`). This means the OTel Collector is automatically monitored on
+Checkmk servers, just like other site processes such as RabbitMQ or the automation
+helpers.
+
+Existing sites will receive this rule automatically during the next update.

cmk/gui/watolib/sample_config/_constants.py

@@ -192,6 +192,11 @@
             "rrdcached",
             "~/omd/sites/[^/]+/bin/rrdcached",
         ),
+        (
+            "a0a69c72-d9ba-412a-a8cb-7a9a6abb4c6b",
+            "otel-collector",
+            "~/omd/sites/[^/]+/bin/otelcol",
+        ),
     ]
 ]
 

cmk/update_config/plugins/actions/rulesets_add_ps_discovery.py

@@ -17,6 +17,7 @@
 RABBITMQ_RULE_ID = "65a3dca4-8d71-45d8-8887-53ef0c63d06f"
 AUTOMATION_HELPER_RULE_ID = "94190e27-2836-488a-b6b4-f23f694a455e"
 UI_JOB_SCHEDULER_RULE_ID = "8b5616fb-a457-404e-a136-24065da7f170"
+OTEL_COLLECTOR_RULE_ID = "a0a69c72-d9ba-412a-a8cb-7a9a6abb4c6b"
 PROXMOX_RULE_IDS = frozenset(
     {
         "c7850d9b-847b-4ae6-b1a7-dc7b1d82a04e",
@@ -25,7 +26,9 @@
         "23bd2fc2-a834-421c-8b7f-c790377f9d59",
     }
 )
-_NEW_DEFAULT_RULE_IDS = frozenset({UI_JOB_SCHEDULER_RULE_ID}) | PROXMOX_RULE_IDS
+_NEW_DEFAULT_RULE_IDS = (
+    frozenset({UI_JOB_SCHEDULER_RULE_ID, OTEL_COLLECTOR_RULE_ID}) | PROXMOX_RULE_IDS
+)
 
 
 class UpdatePSDiscovery(UpdateAction):

tests/unit/cmk/update_config/plugins/actions/test_rulesets_add_ps_discovery.py

@@ -15,6 +15,7 @@
     _NEW_DEFAULT_RULE_IDS,
     add_ps_discovery_rules,
     AUTOMATION_HELPER_RULE_ID,
+    OTEL_COLLECTOR_RULE_ID,
     overwrite_ps_discovery_rules,
     PROXMOX_RULE_IDS,
     PS_DISCOVERY_RULE_NAME,
@@ -70,8 +71,9 @@ def test_update_with_preexisting_ui_job_scheduler() -> None:
     add_ps_discovery_rules(logging.getLogger(), rulesets)
 
     ruleset = rulesets.get_rulesets()[PS_DISCOVERY_RULE_NAME]
-    assert ruleset.num_rules() == 1 + len(PROXMOX_RULE_IDS)
+    assert ruleset.num_rules() == 1 + len(PROXMOX_RULE_IDS) + 1  # +1 for otel-collector
     assert rule_present(ruleset, UI_JOB_SCHEDULER_RULE_ID)
+    assert rule_present(ruleset, OTEL_COLLECTOR_RULE_ID)
 
 
 @pytest.mark.usefixtures("request_context")