ansible-playbook.yml

### docker-swarm-playbook.yml
---
  - name: Setup Common Elements
    hosts: all
    become: true
    gather_facts: true
    remote_user: ${remote_user}
    tasks:
      - name: Create Node Exporter user
        user:
          name: node_exporter
          create_home: no
          shell: /bin/false
          state: present

      - name: Get Node Exporter
        get_url:
          url: https://github.com/prometheus/node_exporter/releases/download/v0.17.0-rc.0/node_exporter-0.17.0-rc.0.linux-amd64.tar.gz
          dest: /tmp/node_exporter-0.17.0-rc.0.linux-amd64.tar.gz

      - name: Unarchive Node Exporter
        unarchive:
          src: /tmp/node_exporter-0.17.0-rc.0.linux-amd64.tar.gz
          dest: /tmp/
          remote_src: yes

      - name: Copy files
        copy:
          src: /tmp/node_exporter-0.17.0-rc.0.linux-amd64/node_exporter
          dest: /usr/local/bin
          remote_src: yes
          owner: node_exporter
          mode: u+x,g+x,o+x

      - name: Remove temp downloaded file
        file:
          path: /tmp/node_exporter-0.17.0-rc.0.linux-amd64.tar.gz
          state: absent

      - name: Remove temp Prometheus files
        file:
          path: /tmp/node_exporter-0.17.0-rc.0.linux-amd64
          state: absent

  - name: Init Node Exporter on Workers
    hosts: docker_workers
    become: true
    gather_facts: true
    remote_user: ${remote_user}
    tasks:
      - name: Copy node_exporter.service
        synchronize: src=/etc/systemd/system/node_exporter.service dest=/etc/systemd/system/node_exporter.service
        delegate_to: "{{ hostvars[groups['docker_first_master'][0]]['inventory_hostname'] }}"

      - name: Start service node_exporter
        service:
          name: node_exporter.service
          state: started

  - name: Init Node Exporter and Swarm Master
    hosts: docker_first_master
    become: true
    gather_facts: false
    remote_user: ${remote_user}
    tasks:

#      - name: Wait for Manager 2 Ready
#        wait_for:
#          host: "${docker_master_2}"
#          port: 22
#          timeout: 300
#
#      - name: Wait for Manager 3 Ready
#        wait_for:
#          host: "${docker_master_3}"
#          port: 22
#          timeout: 300

      - name: Get Prometheus 2.5
        get_url:
          url: https://github.com/prometheus/prometheus/releases/download/v2.5.0/prometheus-2.5.0.linux-amd64.tar.gz
          dest: /tmp/

      - name: Unarchive Prometheus
        unarchive:
          src: /tmp/prometheus-2.5.0.linux-amd64.tar.gz
          dest: /tmp/
          remote_src: yes

      - name: Create Prometheus user
        user:
          name: prometheus
          create_home: no
          shell: /bin/false
          state: present

      - name: Create Prometheus /etc/prometheus directory
        file:
          path: /etc/prometheus
          state: directory
          mode: 0755
          owner: prometheus

      - name: Create Prometheus /var/lib/prometheus directory
        file:
          path: /var/lib/prometheus
          state: directory
          mode: 0755
          owner: prometheus

      - name: Copy prometheus executable
        copy:
          src: /tmp/prometheus-2.5.0.linux-amd64/prometheus
          dest: /usr/local/bin
          remote_src: yes
          owner: prometheus
          mode: u+x,g+x,o+x

      - name: Copy promtool executable
        copy:
          src: /tmp/prometheus-2.5.0.linux-amd64/promtool
          dest: /usr/local/bin
          remote_src: yes
          owner: prometheus
          mode: u+x,g+x,o+x

      - name: Copy Prometheus consoles
        command: cp -r /tmp/prometheus-2.5.0.linux-amd64/consoles /etc/prometheus

      - name: Copy Prometheus console_libraries
        command: cp -r /tmp/prometheus-2.5.0.linux-amd64/console_libraries /etc/prometheus

      - name: Update file ownership
        file:
          path: /etc/prometheus
          state: directory
          owner: prometheus

      - name: Remove temp downloaded file
        file:
          path: /tmp/prometheus-2.5.0.linux-amd64.tar.gz
          state: absent

      - name: Remove temp Prometheus files
        file:
          path: /tmp/prometheus-2.5.0.linux-amd64
          state: absent

      - name: Wait for Worker 1 Ready
        wait_for:
          host: "${docker_worker_1}"
          port: 22
          timeout: 300

      - name: Wait for Worker 2 Ready
        wait_for:
          host: "${docker_worker_2}"
          port: 22
          timeout: 300

      - name: Add ${remote_user} to Docker Group 
        user:
          name: ${remote_user}
          groups: docker
          append: yes

      - name: Run Swarm Init
        command: docker swarm init --advertise-addr ${master_ip}

      - name: Get Worker Token
        command: docker swarm join-token worker -q
        register: worker_token

      - name: Show Worker Token
        debug: var=worker_token.stdout

      - name: Get Master Token
        command: docker swarm join-token manager -q
        register: master_token

      - name: Show Master Token
        debug: var=master_token.stdout

  - name: Join Swarm Cluster
    hosts: docker_masters
    become: true
    remote_user: azadmin
    gather_facts: False
    vars:
      token: "{{ hostvars[groups['docker_first_master'][0]]['master_token']['stdout'] }}"
      master: "{{ hostvars[groups['docker_first_master'][0]]['inventory_hostname'] }}"
    tasks:
      - name: Add ${remote_user} to Docker Worker Group
        command: usermod -aG docker ${remote_user}

      - name: Join Swarm Cluster as Managers
        command: docker swarm join --token {{ token }} ${master_ip}:2377
        register: worker

      - name: Show Results
        debug: var=worker.stdout

      - name: Show Errors
        debug: var=worker.stderr

  - name: Join Swarm Cluster
    hosts: docker_workers
    become: true
    remote_user: azadmin
    gather_facts: False
    vars:
      token: "{{ hostvars[groups['docker_first_master'][0]]['worker_token']['stdout'] }}"
      master: "{{ hostvars[groups['docker_first_master'][0]]['inventory_hostname'] }}"
    tasks:
      - name: Add ${remote_user} to Docker Worker Group
        command: usermod -aG docker ${remote_user}

      - name: Join Swarm Cluster as Workers
        command: docker swarm join --token {{ token }} ${master_ip}:2377
        register: worker

      - name: Show Results
        debug: var=worker.stdout

      - name: Show Errors
        debug: var=worker.stderr