osixia/keepalived

A docker image to run Keepalived.

keepalived.org

Quick start

This image require the kernel module ip_vs loaded on the host (modprobe ip_vs) and need to be run with : --cap-add=NET_ADMIN --net=host

docker run --cap-add=NET_ADMIN --net=host -d osixia/keepalived

Environment Variables

Environement variables defaults are set in image/env.yaml. You can modify environment variable values directly in this file and rebuild the image (see manual build). You can also override those values at run time with -e argument or by setting your own env.yaml file as a docker volume to /etc/env.yaml. See examples below.

• KEEPALIVED_INTERFACE: Keepalived network interface. Defaults to eth0

• KEEPALIVED_PASSWORD: Keepalived password. Defaults to d0cker

• KEEPALIVED_PRIORITY Keepalived node priority. Defaults to 150

• KEEPALIVED_UNICAST_PEERS Keepalived unicast peers. Defaults to : - 192.168.1.10 - 192.168.1.11

  If you want to set this variable at docker run command convert the yaml in python :

  docker run -e KEEPALIVED_UNICAST_PEERS="[192.168.1.10', '192.168.1.11']" -d osixia/phpldapadmin
  

  To convert yaml to python online : http://yaml-online-parser.appspot.com/

• KEEPALIVED_VIRTUAL_IPS Add a read only user. Defaults to :

  - 192.168.1.231
  - 192.168.1.232
  

  If you want to set this variable at docker run command convert the yaml in python, see above.

• KEEPALIVED_NOTIFY Script to execute when node state change. Defaults to /container/service/keepalived/assets/notify.sh

Set environment variables at run time :

Environment variable can be set directly by adding the -e argument in the command line, for example :

docker run -e KEEPALIVED_INTERFACE="eno1" -e KEEPALIVED_PASSWORD="password!" \
-e KEEPALIVED_PRIORITY="100" -d osixia/keepalived

Or by setting your own env.yaml file as a docker volume to /etc/env.yaml

docker run -v /data/my-env.yaml:/etc/env.yaml \
-d osixia/keepalived

Manual build

Clone this project :

git clone https://github.com/osixia/docker-keepalived
cd docker-keepalived

Adapt Makefile, set your image NAME and VERSION, for example :

NAME = osixia/keepalived
VERSION = 0.1.6

becomes :
NAME = billy-the-king/keepalived
VERSION = 0.1.0

Build your image :

make build

Run your image :

docker run -d billy-the-king/keepalived:0.1.0

Tests

We use Bats (Bash Automated Testing System) to test this image:

https://github.com/sstephenson/bats

Install Bats, and in this project directory run :

make test