fix: add missing pmie webhook action configuration functionality

Resolves Red Hat issue RHEL-13760

README.md

@@ -49,6 +49,12 @@ Example:
 metrics_monitored_hosts: ["webserver.example.com", "database.example.com"]
 ```
 
+### metrics_webhook_endpoint: ''
+
+Webhook endpoint (URL) where notification about any automatically detected
+performance issues are to be sent.  By default, these events are logged to
+the local system log only.
+
 ### metrics_retention_days: 14
 
 Retain historical performance data for the specified number of days; after

defaults/main.yml

@@ -46,3 +46,8 @@ metrics_manage_firewall: false
 # If true, manage the pmcd port, pmproxy ports using the selinux role
 # depending upon the configuration parameters.
 metrics_manage_selinux: false
+
+# Webhook endpoint (URL) where notification about any automatically detected
+# performance issues are to be sent.  By default, these events are logged to the
+# local system log only.
+metrics_webhook_endpoint: ''

tasks/main.yml

@@ -84,6 +84,7 @@
 
 - name: Setup metric collection service.
   vars:
+    pcp_pmie_endpoint: "{{ metrics_webhook_endpoint }}"
     pcp_pmlogger_discard: "{{ metrics_retention_days }}"
     pcp_target_hosts: "{{ metrics_monitored_hosts }}"
     pcp_optional_agents: "{{ __metrics_domains }}"

tests/check_notification.yml

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+- name: Check if webhook notification is set
+  command: grep -E 'webhook_endpoint .* "?{{ __test_webhook }}"?' /var/lib/pcp/config/pmie/config.default
+  changed_when: false
+# yamllint enable rule:line-length

tests/tests_verify_notification.yml

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: MIT
+---
+- name: Test configuration of webhook notification
+  hosts: all
+  vars:
+    __test_webhook: https://example.com:4242/endpoint
+
+  roles:
+    - role: linux-system-roles.metrics
+      vars:
+        metrics_webhook_endpoint: "{{ __test_webhook }}"
+
+  pre_tasks:
+    - name: Save state of services
+      import_tasks: get_services_state.yml
+
+  tasks:
+    - name: Check basic services and the webhook endpoint
+      include_tasks: "{{ item }}"
+      loop:
+        - check_pcp.yml
+        - check_pmie.yml
+        - check_notification.yml
+
+  post_tasks:
+    - name: Restore state of services
+      import_tasks: restore_services_state.yml