Update file main.yml
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@ -1,44 +1,4 @@
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---
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# =============================================================================
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# DOCKER ROLE - roles/docker/tasks/main.yml
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# =============================================================================
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# ========== 1. Cleanup conflicting Docker configs ==========
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- name: Remove conflicting Docker repository files
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file:
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path: "{{ item }}"
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state: absent
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loop:
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- /etc/apt/sources.list.d/download_docker_com_linux_ubuntu.list
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- /etc/apt/sources.list.d/docker-ce.list
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- /etc/apt/sources.list.d/docker.list
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become: yes
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tags: [docker, deploy_docker]
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- name: Remove old Docker GPG keys
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file:
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path: "{{ item }}"
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state: absent
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loop:
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- /etc/apt/keyrings/docker.gpg
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- /etc/apt/keyrings/docker.asc
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- /usr/share/keyrings/docker-archive-keyring.gpg
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become: yes
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tags: [docker, deploy_docker]
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- name: Clean apt cache
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apt:
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clean: yes
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become: yes
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tags: [docker, deploy_docker]
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- name: Clear apt lists cache (contents only, not directory)
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shell: rm -rf /var/lib/apt/lists/*
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become: yes
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tags: [docker, deploy_docker]
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ignore_errors: yes
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# ========== 2. Install Docker dependencies ==========
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- name: Install Docker dependencies
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apt:
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name:
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@ -49,154 +9,87 @@
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- lsb-release
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state: present
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update_cache: yes
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become: yes
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tags: [docker, deploy_docker]
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# ========== 3. Setup GPG key ==========
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- name: Create keyrings directory
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file:
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path: /etc/apt/keyrings
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state: directory
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mode: '0755'
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become: yes
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tags: [docker, deploy_docker]
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- name: Download Docker GPG key
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get_url:
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- name: Add Docker GPG key
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apt_key:
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url: https://download.docker.com/linux/ubuntu/gpg
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dest: /etc/apt/keyrings/docker.asc
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mode: '0644'
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force: yes
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become: yes
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tags: [docker, deploy_docker]
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state: present
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- name: Dearmor Docker GPG key
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shell: gpg --dearmor -o /etc/apt/keyrings/docker.gpg /etc/apt/keyrings/docker.asc
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args:
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creates: /etc/apt/keyrings/docker.gpg
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become: yes
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tags: [docker, deploy_docker]
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- name: Set permissions on Docker GPG key
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file:
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path: /etc/apt/keyrings/docker.gpg
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mode: 'a+r'
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become: yes
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tags: [docker, deploy_docker]
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# ========== 4. Add Docker repository ==========
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- name: Add Docker repository
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copy:
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content: |
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deb [arch={{ ansible_architecture }} signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable
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dest: /etc/apt/sources.list.d/docker.list
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mode: '0644'
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become: yes
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tags: [docker, deploy_docker]
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apt_repository:
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repo: "deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
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state: present
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- name: Update apt cache after adding Docker repo
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apt:
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update_cache: yes
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cache_valid_time: 0
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become: yes
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tags: [docker, deploy_docker]
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# ========== 5. Install Docker packages ==========
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- name: Install docker-ce and docker-ce-cli first
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- name: Install Docker
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apt:
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name:
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- "docker-ce={{ docker_ce_version }}"
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- "docker-ce-cli={{ docker_ce_cli_version }}"
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- docker-ce
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- docker-ce-cli
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- containerd.io
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state: present
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allow_downgrade: yes
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allow_change_held_packages: yes
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become: yes
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tags: [docker, deploy_docker]
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update_cache: yes
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- name: Install containerd.io (after docker-ce to preserve runc)
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- name: Install Docker Compose
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apt:
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name: "containerd.io={{ containerd_io_version }}"
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name: docker-compose-plugin
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state: present
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allow_downgrade: yes
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allow_change_held_packages: yes
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become: yes
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notify: restart docker
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tags: [docker, deploy_docker]
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# ========== 6. Start Docker and configure user ==========
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- name: Start and enable Docker service
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systemd:
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name: docker
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state: started
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enabled: yes
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daemon_reload: yes
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become: yes
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tags: [docker, deploy_docker]
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- name: Wait for Docker socket to be available
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wait_for:
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path: /var/run/docker.sock
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timeout: 30
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tags: [docker, deploy_docker]
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- name: Wait for Docker to start
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pause:
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seconds: 5
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- name: Add admin user to docker group
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user:
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name: "{{ admin_user | default('zailon') }}"
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groups: docker
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append: yes
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become: yes
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tags: [docker, deploy_docker]
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# ========== 7. Verify installation ==========
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- name: Verify Docker installation
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command: docker --version
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register: docker_version
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changed_when: false
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tags: [docker, deploy_docker]
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- name: Show Docker version
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debug:
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msg: "Docker version: {{ docker_version.stdout }}"
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tags: [docker, deploy_docker]
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- name: Verify Docker Compose installation
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command: docker compose version
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register: docker_compose_version
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changed_when: false
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tags: [docker, deploy_docker]
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- name: Show Docker Compose version
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debug:
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msg: "Docker Compose version: {{ docker_compose_version.stdout }}"
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tags: [docker, deploy_docker]
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- name: Test Docker with docker ps
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command: docker ps
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register: docker_ps_test
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changed_when: false
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tags: [docker, deploy_docker]
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- name: Show Docker containers
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debug:
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msg: "Docker is working! Containers: {{ docker_ps_test.stdout_lines | default(['none']) }}"
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tags: [docker, deploy_docker]
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# ========== 8. Docker monitoring (optional) ==========
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- name: Setup Docker monitoring for Node Exporter
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- name: Setup Docker monitoring
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block:
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- name: Create scripts directory
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file:
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path: /opt/scripts
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state: directory
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mode: '0755'
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become: yes
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- name: Deploy Docker metrics script
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copy:
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content: |
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#!/bin/bash
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# Docker metrics script for Node Exporter textfile collector
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OUTFILE="/var/lib/node_exporter/textfile_collector/docker_metrics.prom"
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# Get container counts
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TOTAL_CONTAINERS=$(docker ps -a -q 2>/dev/null | wc -l)
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RUNNING_CONTAINERS=$(docker ps -q 2>/dev/null | wc -l)
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EXITED_CONTAINERS=$((TOTAL_CONTAINERS - RUNNING_CONTAINERS))
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# Write metrics in Prometheus format
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cat << EOF > $OUTFILE
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# HELP docker_containers_total Total number of Docker containers
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# TYPE docker_containers_total gauge
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docker_containers_total $TOTAL_CONTAINERS
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# HELP docker_containers_running Number of running Docker containers
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# HELP docker_containers_running Number of running Docker containers
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# TYPE docker_containers_running gauge
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docker_containers_running $RUNNING_CONTAINERS
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# HELP docker_containers_exited Number of exited Docker containers
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@ -207,6 +100,36 @@
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mode: '0755'
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become: yes
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- name: Create systemd service for Docker metrics
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copy:
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content: |
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[Unit]
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Description=Docker metrics script
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After=docker.service
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[Service]
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User=root
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ExecStart=/opt/scripts/docker_metrics.sh
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dest: /etc/systemd/system/docker-metrics.service
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mode: '0644'
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become: yes
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- name: Create systemd timer for Docker metrics
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copy:
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content: |
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[Unit]
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Description=Run Docker metrics every 30 seconds
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[Timer]
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OnBootSec=1min
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OnUnitActiveSec=30s
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[Install]
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WantedBy=timers.target
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dest: /etc/systemd/system/docker-metrics.timer
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mode: '0644'
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become: yes
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- name: Ensure Node Exporter textfile directory exists
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file:
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path: /var/lib/node_exporter/textfile_collector
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mode: '0755'
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become: yes
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- name: Enable Docker metrics timer
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- name: Enable and start Docker metrics timer
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systemd:
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name: docker-metrics.timer
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enabled: yes
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state: started
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daemon_reload: yes
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become: yes
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when: enable_docker_monitoring | default(true)
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tags: [docker, monitoring]
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- name: Test Docker metrics script
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command: /opt/scripts/docker_metrics.sh
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register: metrics_test
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changed_when: false
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- name: Show Docker metrics test result
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debug:
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var: metrics_test.stdout
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# ========== Fix Docker runc version ==========
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- name: Check current runc version
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command: runc --version
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register: runc_version_check
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ignore_errors: yes
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changed_when: false
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become: yes
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- name: Download and update runc to v1.2.4 if needed
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block:
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- name: Download runc v1.2.4
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get_url:
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url: https://github.com/opencontainers/runc/releases/download/v1.2.4/runc.amd64
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dest: /tmp/runc.amd64
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mode: '0755'
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become: yes
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- name: Stop docker service
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systemd:
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name: docker
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state: stopped
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become: yes
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- name: Backup existing runc
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command: mv /usr/bin/runc /usr/bin/runc.bak
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args:
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creates: /usr/bin/runc.bak
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become: yes
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- name: Install new runc
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copy:
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src: /tmp/runc.amd64
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dest: /usr/bin/runc
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remote_src: yes
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mode: '0755'
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become: yes
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- name: Start docker service
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systemd:
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name: docker
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state: started
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become: yes
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- name: Clean up temporary runc file
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file:
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path: /tmp/runc.amd64
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state: absent
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become: yes
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- name: Verify new runc version
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command: runc --version
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register: new_runc_version
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become: yes
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- name: Show runc update result
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debug:
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msg: "runc updated to version: {{ new_runc_version.stdout }}"
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become: yes
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when:
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- runc_version_check is failed or
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"'1.2.4' not in runc_version_check.stdout"
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- ansible_architecture == "x86_64"
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become: yes
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