---
- name: Install Logstash
  hosts: elastic-logstash
  become: true
  vars_files:
    - vars/variables.yml

  environment: "{{ deployment_environment_variables | default({}) }}"

  tasks:
    - name: Set quarter memory fact
      set_fact:
        q_mem: "{{ ansible_memtotal_mb // 4 }}"

    - name: Set logstash facts
      set_fact:
        elastic_heap_size: "{{ ((q_mem | int) > 30720) | ternary(30720, q_mem) }}"
      when:
        - elastic_heap_size is undefined

    - include_tasks: common_task_install_elk_repo.yml

    - name: Configure systcl vm.max_map_count=262144 on container hosts
      sysctl:
        name: "vm.max_map_count"
        value: "262144"
        state: "present"
        reload: "yes"
      delegate_to: "{{ physical_host }}"
      tags:
        - sysctl

    - name: Ensure mount directories exists
      file:
        path: "/openstack/{{ inventory_hostname }}/logstash"
        state: "directory"
      delegate_to: "{{ physical_host }}"

    - name: logstash datapath bind mount
      lxc_container:
        name: "{{ inventory_hostname }}"
        container_command: |
          [[ ! -d "/var/lib/logstash" ]] && mkdir -p "/var/lib/logstash"
        container_config:
          - "lxc.mount.entry=/openstack/{{ inventory_hostname }}/logstash var/lib/logstash none bind 0 0"
      delegate_to: "{{ physical_host }}"
      when:
        - physical_host != inventory_hostname
        - container_tech | default('lxc') == 'lxc'

    - name: Ensure Java is installed
      apt:
        name: openjdk-8-jre
        state: present
        install_recommends: yes
        update_cache: yes

    - name: Ensure Logstash is installed
      apt:
        name: logstash
        state: present
        update_cache: yes

    - name: Drop Logstash conf for beats input
      template:
        src: templates/02-beats-input.conf.j2
        dest: /etc/logstash/conf.d/02-beats-input.conf

    - name: Drop Logstash conf for beats input
      template:
        src: templates/10-syslog-filter.conf.j2
        dest: /etc/logstash/conf.d/10-syslog-filter.conf

    - name: Drop Logstash conf for beats output
      template:
        src: templates/30-elasticsearch-output.conf.j2
        dest: /etc/logstash/conf.d/30-elasticsearch-output.conf

    - name: Drop elasticsearch conf file
      template:
        src: "{{ item.src }}"
        dest: "{{ item.dest }}"
      with_items:
        - src: templates/jvm.options.j2
          dest: /etc/logstash/jvm.options
      tags:
        - config

    - name: Ensure logstash ownership
      file:
        path: /var/lib/logstash
        owner: logstash
        group: logstash
        recurse: true

    - name: Enable and restart logstash
      systemd:
        name: "logstash"
        enabled: true
        state: restarted