03-etcd.yml

---

- hosts: tag_krole_etcd
  vars:
    - etcd_url: "https://github.com/coreos/etcd/releases/download/v3.0.1/etcd-v3.0.1-linux-amd64.tar.gz"
  tasks:
    - name: ensure required etcd directories exist
      file:
        state: "directory"
        path: "{{ item }}"
      with_items:
        - "/etc/etcd"
        - "/var/lib/etcd"

    - name: ensure certificates are installed in /etc/etcd
      copy:
        src: "fetched/{{ item }}"
        dest: "/etc/etcd/{{ item }}"
      with_items:
        - ca.pem
        - kubernetes-key.pem 
        - kubernetes.pem
     
    - name: download etcd release binary
      get_url:
        url: "{{ etcd_url }}"
        dest: "/home/ubuntu/"

    - name: untar etcd release
      unarchive:
        src: "/home/ubuntu/{{ etcd_url | basename }}"
        dest: "/home/ubuntu/"
        copy: False

    - name: copy etcd binary to /usr/bin
      shell: cp /home/ubuntu/etcd*/etcd* /usr/bin
      args:
        creates: /usr/bin/etcd

    - name: install etcd.service configuration file
      template:
        src: "etcd.service"
        dest: "/etc/systemd/system/"

#
# Now that etcd is configured, start it up one at a time
#
- hosts: tag_krole_etcd
  serial: 1
  tasks:

    - name: ensure etcd is stopped
      service:
        name: "etcd"
        state: "stopped"
    
    - name: reload etcd
      shell: systemctl {{ item }}
      with_items:
        - "daemon-reload"
        - "enable etcd"
        - "restart etcd"

    - name: wait for etcd to be listening on 2380
      wait_for: 
        port: 2380
        host: "{{ ansible_default_ipv4.address }}"
        delay: 10
      tags:
        - systemd

- hosts: tag_krole_etcd[0]
  tasks:

    - name: verify cluster health
      shell: etcdctl --ca-file=/etc/etcd/ca.pem cluster-health | grep "cluster is healthy"
      changed_when: False
      tags:
        - systemd