deploy_couchbase.yml

---
- name: Deploy Couchbase on 1-node
  hosts: all

  tasks:
  - name: Launch download of Couchbase 5.0.1 EE
    get_url:
      url: http://packages.couchbase.com/releases/5.0.1/couchbase-server-enterprise-5.0.1-centos7.x86_64.rpm
      dest: /tmp
    async: 3600
    poll: 0
    register: download_couchbase

  - name: Configure Hostname
    hostname:
      name: "{{ inventory_hostname }}"

  - name: Fail if memory not enough
    fail:
      msg: "Memory is not enough. ansible_memory_mb.real.total: {{ ansible_memory_mb.real.total }}. ansible_memory_mb.real.used: {{ ansible_memory_mb.real.used }}"
    when: ansible_memory_mb.real.total < 3584 or ansible_memory_mb.real.used > 1000

  - name: Fail if diskspace is not enough or fstype is wrong
    fail:
      msg: "Diskspace is not enough or fstype is wrong"
    loop: "{{ ansible_mounts }}"
    when: item.mount == "/" and ( item.size_available < 9000000000 or item.fstype != "xfs" )

  - name: Disable swapiness
    #copy:
    #  content: "0"
    #  dest: /proc/sys/vm/swappiness
    #  owner: root
    #  group: root
    #  mode: 0755
    shell: echo 0 > /proc/sys/vm/swappiness

  - name: Disable swapiness permanently
    blockinfile:
      path: /etc/sysctl.conf
      block: |
        # Set swappiness to 0 to avoid swapping
        vm.swappiness = 0

  - name: Install firewalld
    yum: name=firewalld state=present

  - name: Enable and start firewalld
    service: name=firewalld state=started enabled=yes

  - name: Allow 8091 TCP port 
    firewalld:
      port: 8091/tcp
      state: enabled
      permanent: yes
      immediate: yes

  - name: Disable Transparent Huge Pages
    shell: echo never > "{{ item }}"
    loop:
    - /sys/kernel/mm/transparent_hugepage/enabled
    - /sys/kernel/mm/transparent_hugepage/defrag

  - name: Wait for Couchbase download to finish
    async_status:
      jid: "{{ download_couchbase.ansible_job_id }}"
    register: job_result
    until: job_result.finished
    retries: 30

  - name: Install Couchbase
    yum: 
      name: /tmp/couchbase-server-enterprise-5.0.1-centos7.x86_64.rpm
      state: present

  - name: Show state of couchbase-server service
    shell: systemctl status couchbase-server