Ansible role: Keepalived

Install and configure Keepalived

Requirements

• Ansible >= 2.9
• Debian
  • Buster
  • Bullseye

Role variables

Name	Type	Required	Default	Comment
keepalived_mail_from	str	no	keepalived@test.local	from header for notification mail
keepalived_smtp_server	str	no	localhost	the smtp server
keepalived_notification_mails	array	no		the mail addresses to notify
keepalived_vrrp_instances	hash	no		the vrrp instances
keepalived_vrrp_scripts	hash	no		the vrrp check scripts
keepalived_track_files	hash	no		the track files

keepalived_vrrp_instances

Name	Type	Required	Default	Comment
key	str	yes		the instance name
state	str	yes		Initial state, MASTER or BACKUP
interface	str	yes		interface for inside_network, bound by vrrp
virtual_router_id	int	yes		arbitrary unique number from 1 to 255
priority	int	yes		for electing MASTER, highest priority wins
smtp_alert	bool	yes		send SMTP alerts
authentication	hash	no		use an authentication deprecated
virtual_ipaddresses	array	yes		addresses add on change to MASTER, to BACKUP
track_scripts	array	no		add a tracking script to the interface
track_files	array	no		add a tracking file to the interface
notify	hash	no		notify scripts, alert as above

Example:

vip_ngninx:
  state: master
  interface: eth0
  virtual_router_id: 5
  priority: 200
  smtp_alert: true
  authentication:
    type: pass
    pass: 12345678
  virtual_ipaddresses:
    - 172.255.0.254/32 dev eth0
  track_scripts:
    - check_nginx
  notify:
    master: /usr/bin/notification.sh

keepalived_vrrp_scripts

Name	Type	Required	Default	Comment
key	str	yes		the script name
script	str	yes		path of the script to execute
interval	int	no	2	seconds between script invocations
fall	int	no	2	number of successes for KO transition
rise	int	no	2	number of successes for OK transition
weight	int	no	1	weigth of script

Example:

check_nginx:
  script: /usr/local/bin/check_nginx
  fall: 3
  rise: 5
  interval: 10

keepalived_track_file

Name	Type	Required	Default	Comment
key	str	yes		the track file name
file	str	yes		path of the file to track
weight	int	no	1	weigth of file

Example:

master_file:
  file: /tmp/master
  weight: 3

How to use

- hosts: server
  roles:
    - keepalived
  vars:
    keepalived_vrrp_scripts:
      - name: check_file
        script: test -e /path/file
        interval: 5
    keepalived_vrrp_instances:
      - name: test
        state: master
        interface: eth0
        virtual_router_id: 5
        priority: 200
        virtual_ipaddresses:
          - 172.255.0.254/32 dev eth0
        track_scripts:
          - check_file
        notify:
          master: touch /tmp/keepalived

Development

Test with molecule and docker

• install docker
• install python3 and python3-pip
• install molecule and dependencies pip3 install molecule 'molecule[docker]' docker ansible-lint testinfra yamllint
• run molecule test

License

Copyright (c) 2019 Adrien Waksberg

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.