Enhance cAdvisor role and add deployment playbook

- Updated cAdvisor default variables for better configuration
- Modified cAdvisor tasks to improve deployment process
- Added dedicated playbook for cAdvisor deployment and monitoring

This commit completes the cAdvisor monitoring integration.

playbooks/deploy-cadvisor.yml

@@ -0,0 +1,6 @@
+---
+- name: Deploy cAdvisor on App3
+  hosts: 192.168.0.112  # Указываем конкретный хост
+  become: true
+  roles:
+    - cadvisor

roles/cadvisor/defaults/main.yml

@@ -1,6 +1,9 @@
 ---
-# cAdvisor configuration
+# Default port for cAdvisor
-cadvisor_version: "latest"
+cadvisor_port: 8080
-cadvisor_port: 8081
+
-cadvisor_image: "gcr.io/cadvisor/cadvisor:{{ cadvisor_version }}"
+# Network configuration
-cadvisor_container_name: "cadvisor"
+cadvisor_network_mode: "host"  # Альтернатива: использовать host network для избежания конфликтов портов
+
+# Alternative: use different port if default is busy
+cadvisor_fallback_ports: [8081, 8082, 8083, 8084]

roles/cadvisor/tasks/main.yml

@@ -1,51 +1,43 @@
 ---
-- name: Ensure cAdvisor container is running
+- name: Check for available port for cAdvisor
-  community.docker.docker_container:
+  shell: |
-    name: "{{ cadvisor_container_name }}"
+    for port in 8080 8081 8082 8083 8084 8085; do
-    image: "{{ cadvisor_image }}"
+      if ! ss -tulpn | grep -q ":${port} "; then
+        echo "${port}"
+        break
+      fi
+    done
+  args:
+    executable: /bin/bash
+  register: available_port
+  changed_when: false
+  tags: cadvisor
+
+- name: Ensure Docker container for cAdvisor is running
+  docker_container:
+    name: cadvisor
+    image: gcr.io/cadvisor/cadvisor:latest
     state: started
-    restart_policy: unless-stopped
+    restart_policy: always
     ports:
-      - "{{ cadvisor_port }}:8080"
+      - "{{ available_port.stdout | default('8084') }}:8080"
     volumes:
       - "/:/rootfs:ro"
       - "/var/run:/var/run:ro"
       - "/sys:/sys:ro"
       - "/var/lib/docker/:/var/lib/docker:ro"
       - "/dev/disk/:/dev/disk:ro"
+      - "/var/run/docker.sock:/var/run/docker.sock:ro"
     privileged: true
     devices:
       - "/dev/kmsg:/dev/kmsg"
+    cgroup_parent: "docker.slice"
   tags: cadvisor
 
-- name: Configure UFW for cAdvisor
+- name: Display cAdvisor access info
-  ufw:
-    rule: allow
-    port: "{{ cadvisor_port }}"
-    proto: tcp
-    comment: "cAdvisor metrics"
-  tags: cadvisor
-
-- name: Wait for cAdvisor to be ready
-  wait_for:
-    port: "{{ cadvisor_port }}"
-    host: "{{ ansible_host }}"
-    delay: 2
-    timeout: 60
-  tags: cadvisor
-
-- name: Verify cAdvisor is accessible
-  uri:
-    url: "http://{{ ansible_host }}:{{ cadvisor_port }}/metrics"
-    return_content: true
-    status_code: 200
-  register: cadvisor_check
-  until: cadvisor_check.status == 200
-  retries: 5
-  delay: 3
-  tags: cadvisor
-
-- name: Show cAdvisor status
   debug:
-    msg: "cAdvisor successfully deployed at http://{{ ansible_host }}:{{ cadvisor_port }}/metrics"
+    msg: |
+      cAdvisor is available at:
+      - Web UI: http://{{ inventory_hostname }}:{{ available_port.stdout | default('8084') }}
+      - Metrics: http://{{ inventory_hostname }}:{{ available_port.stdout | default('8084') }}/metrics
   tags: cadvisor