browbeat/ansible/install/roles/grafana/tasks/main.yml

---
#
# Install/run grafana-server for browbeat
#

# check that grafana_host and graphite_host is entered prior to playbook run
- name: Check Graphite/Grafana Host IP Address
  fail:
    msg="** Edit grafana_host and graphite_host in ../install/group_vars/all.yml before running **"
  when: ((grafana_host is none) or (graphite_host is none))

- name: Install grafana RPM repo
  copy:
    src=grafana.repo
    dest=/etc/yum.repos.d/grafana.repo
    owner=root
    group=root
    mode=0644
  become: true

- name: Import grafana GPG Key
  rpm_key: key=https://grafanarel.s3.amazonaws.com/RPM-GPG-KEY-grafana
    state=present
  become: True

- name: Install grafana RPM
  yum: name={{ item }} state=present
  become: true
  with_items:
    - grafana

- name: Set grafana config values
  ini_file:
    dest=/etc/grafana/grafana.ini
    section={{item.section}}
    option={{item.option}}
    value={{item.value}}
  with_items:
    - section: server
      option: http_port
      value: "{{grafana_port}}"
    - section: auth.anonymous
      option: enabled
      value: true
    - section: security
      option: admin_user
      value: "{{grafana_username}}"
    - section: security
      option: admin_password
      value: "{{grafana_password}}"
  become: true

### begin firewall ###
# we need TCP/3000 open
# determine firewall status and take action
# 1) use firewall-cmd if firewalld is utilized
# 2) insert iptables rule if iptables is used

# Firewalld
- name: (grafana) Determine if firewalld is in use
  shell: systemctl is-enabled firewalld.service | egrep -qv 'masked|disabled'
  ignore_errors: true
  register: firewalld_in_use
  no_log: true
  tags:
    # Skip ANSIBLE0012] Commands should not change things if nothing needs doing
    # Need to know if firewalld is in use.
    - skip_ansible_lint

- name: (grafana) Determine if firewalld is active
  shell: systemctl is-active firewalld.service | grep -vq inactive
  ignore_errors: true
  register: firewalld_is_active
  no_log: true
  tags:
    # Skip ANSIBLE0012] Commands should not change things if nothing needs doing
    # Need to know if firewalld is active.
    - skip_ansible_lint

- name: (grafana) Determine if TCP/{{grafana_port}} is already active
  shell: firewall-cmd --list-ports | egrep -q "^{{grafana_port}}/tcp"
  ignore_errors: true
  register: firewalld_grafana_port_exists
  no_log: true
  tags:
    # Skip ANSIBLE0012] Commands should not change things if nothing needs doing
    # Need to know if port is already active.
    - skip_ansible_lint

# add firewall rule via firewall-cmd
- name: (grafana) Add firewall rule for TCP/{{grafana_port}} (firewalld)
  command: "{{ item }}"
  with_items:
    - firewall-cmd --zone=public --add-port={{grafana_port}}/tcp --permanent
    - firewall-cmd --reload
  ignore_errors: true
  become: true
  when: firewalld_in_use.rc == 0 and firewalld_is_active.rc == 0 and firewalld_grafana_port_exists.rc != 0

# iptables-services
- name: (grafana) check firewall rules for TCP/{{grafana_port}} (iptables-services)
  shell: grep "dport {{grafana_port}} \-j ACCEPT" /etc/sysconfig/iptables | wc -l
  ignore_errors: true
  register: iptables_grafana_port_exists
  failed_when: iptables_grafana_port_exists == 127
  no_log: true
  tags:
    # Skip ANSIBLE0012] Commands should not change things if nothing needs doing
    # Need to know if port exists.
    - skip_ansible_lint

- name: (grafana) Add firewall rule for TCP/{{grafana_port}} (iptables-services)
  lineinfile:
    dest: /etc/sysconfig/iptables
    line: '-A INPUT -p tcp -m tcp --dport {{grafana_port}} -j ACCEPT'
    regexp: '^INPUT -i lo -j ACCEPT'
    insertbefore: '-A INPUT -i lo -j ACCEPT'
    backup: yes
  when: firewalld_in_use.rc != 0 and firewalld_is_active.rc != 0 and iptables_grafana_port_exists.stdout|int == 0
  register: iptables_needs_restart

- name: (grafana) Restart iptables-services for TCP/{{grafana_port}} (iptables-services)
  command: systemctl restart iptables.service
  ignore_errors: true
  when: iptables_needs_restart != 0 and firewalld_in_use.rc != 0 and firewalld_is_active.rc != 0

### end firewall ###

# setup the grafana-server service
- name: Setup grafana-server service
  service: name=grafana-server state=started enabled=true
  become: true
  ignore_errors: true

- name: Wait for grafana to be ready
  wait_for: host={{grafana_host}} port={{grafana_port}} delay=5 timeout=30

#
# Add graphite server as a default datasource
#
- name: Create Data Source on grafana server
  uri:
    method: POST
    header: 'Content-Type: application/json'
    body: "{{ lookup('template', 'data_source.json.j2') |to_json }}"
    body_format: json
    url: http://{{grafana_host}}:{{grafana_port}}/api/datasources
    username: "{{ grafana_username }}"
    password: "{{ grafana_password }}"
  connection: local