157 lines
4.3 KiB
YAML
157 lines
4.3 KiB
YAML
---
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- name: Install Docker dependencies
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apt:
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name:
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- apt-transport-https
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- ca-certificates
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- curl
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- gnupg
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- lsb-release
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state: present
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update_cache: yes
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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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state: present
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- name: Add Docker repository
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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: Install Docker
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apt:
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name:
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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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update_cache: yes
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- name: Install Docker Compose
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apt:
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name: docker-compose-plugin
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state: present
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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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- name: Wait for Docker to start
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pause:
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seconds: 5
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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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- name: Show Docker version
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debug:
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msg: "Docker version: {{ docker_version.stdout }}"
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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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- 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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- 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{metric_type="total"} $TOTAL_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{metric_type="running"} $RUNNING_CONTAINERS
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# HELP docker_containers_exited Number of exited Docker containers
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# TYPE docker_containers_exited gauge
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docker_containers_exited{metric_type="exited"} $EXITED_CONTAINERS
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EOF
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dest: /opt/scripts/docker_metrics.sh
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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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state: directory
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owner: node_exporter
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group: node_exporter
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mode: '0755'
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become: yes
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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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- 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 |