Enable podman exporter

This PR enables podman_exporter back and add support for TLS certificates.

roles/edpm_telemetry/defaults/main.yml

@@ -53,3 +53,4 @@ edpm_telemetry_healthcheck: true
 edpm_telemetry_enabled_exporters:
   - ceilometer_agent_compute
   - node_exporter
+  - podman_exporter

roles/edpm_telemetry/tasks/configure.yml

@@ -112,11 +112,14 @@
   when:
     - tls_crt_stat.stat.exists and tls_key_stat.stat.exists
   block:
-    - name: Create config file for node_exporter
-      ansible.builtin.template:
-        dest: "{{ edpm_telemetry_config_dest }}/node_exporter.yaml"
-        mode: "0644"
-        src: node_exporter.yaml.j2
+    - name: Create config file for exporters
+      ansible.builtin.include_tasks:
+        file: exporter_tls.yml
+      loop:
+        - node_exporter
+        - podman_exporter
+      loop_control:
+        loop_var: exporter
 
     - name: Change the owner of the crt
       become: true

roles/edpm_telemetry/tasks/exporter_tls.yml

@@ -0,0 +1,7 @@
+---
+
+- name: Create config file for exporter
+  ansible.builtin.template:
+    dest: "{{ edpm_telemetry_config_dest }}/{{ exporter }}.yaml"
+    mode: "0644"
+    src: "{{ exporter }}.yaml.j2"

roles/edpm_telemetry/templates/podman_exporter.json.j2

@@ -6,6 +6,11 @@
     "privileged": true,
     "ports": ["9882:9882"],
     "net": "host",
+{% if tls_cert_exists|bool %}
+    "command": [
+        "--web.config.file=/etc/podman_exporter/podman_exporter.yaml"
+    ],
+{% endif %}
     "environment": {
         "OS_ENDPOINT_TYPE": "internal",
         "CONTAINER_HOST": "unix:///run/podman/podman.sock"
@@ -17,6 +22,10 @@
     },
 {% endif %}
     "volumes": [
+{% if tls_cert_exists|bool %}
+        "{{ edpm_telemetry_config_dest }}/podman_exporter.yaml:/etc/podman_exporter/podman_exporter.yaml:z",
+        "{{ edpm_telemetry_certs }}:/etc/podman_exporter/tls:z",
+{% endif %}
        "/run/podman/podman.sock:/run/podman/podman.sock:rw,z"
     ]
 }

roles/edpm_telemetry/templates/podman_exporter.yaml.j2

@@ -0,0 +1,3 @@
+tls_server_config:
+    cert_file: /etc/podman_exporter/tls/tls.crt
+    key_file: /etc/podman_exporter/tls/tls.key