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Setup a online.net failover IP with heartbeat on Debian

by Pierre-Yves Landuré — last modified Nov 08, 2017 02:53

Online.net provide a fail-over IP functionality for Dedibox servers. This functionality can be configured by a REST interface. This howto setup a REST client for the high-availability cluster software Heartbeat allowing to change fail-over IP destination when a member of the cluster crash.

This howto is tested on:

  • Debian 7.0 Wheezy

Prerequisite

This howto needs:

Parameters

Provide the REST API authentication key (available in the API page of Online.net console):

API_TOKEN="061652d05e21be8febf8af5d53abaf5ecf7fb6f4"

Provide the name of the network interface linked to the failover IP:

NET_DEV="eth0"

Provide the failover IP address assigned to the cluster:

FAILOVER_IP="xx.xx.xx.xx"

Installation

Detect the destination IP address of the failover IP:

NET_IP="$(command ifconfig "${NET_DEV}" \
    | command grep 'inet ' \
    | command sed -e 's/^.*inet [^:]*:\([^ ]*\) .*$/\1/')"

Environment preparation

Install the needed software:

command apt-get install curl

Download the Heartbeat resource script:

command wget 'https://raw.github.com/biapy/howto.biapy.com/master/various/OnlineFailoverIP' \
    --quiet --no-check-certificate --output-document='/etc/ha.d/resource.d/OnlineFailoverIP'
command chmod +x '/etc/ha.d/resource.d/OnlineFailoverIP'

Configuration

Configure Heartbeat:

command sed -i \
    -e "s/${FAILOVER_IP}.*$/& OnlineFailoverIP::${API_TOKEN}::${FAILOVER_IP}::${NET_IP}/" \
  '/etc/ha.d/haresources'

Reload Heartbeat configuration:

service heartbeat reload

Thanks