init

image/Dockerfile

@@ -4,6 +4,7 @@ MAINTAINER Bertrand Gouny <bertrand.gouny@osixia.net>
 # This container need run options :
 # --privileged=true
 # --net=host
+# -v /lib/modules:/lib/modules
 
 # Use baseimage-docker's init system.
 CMD ["/sbin/my_init"]

image/env.yml

@@ -1,10 +1,11 @@
+KEEPALIVED_INTERFACE: eno1
 KEEPALIVED_PASSWORD: d0cker
 
 # for electing MASTER, highest priority wins.
 # to be MASTER, make 50 more than other machines
 KEEPALIVED_PRIORITY: 150
 
-KEEPALIVED_UNICAST_PEER:
+KEEPALIVED_UNICAST_PEERS:
   - 172.17.8.101
   - 172.17.8.102
   - 172.17.8.103

image/service/keepalived/assets/keepalived.conf

@@ -1,5 +1,5 @@
 vrrp_instance VI_1 {
-  interface eno1
+  interface {{ keepalived_interface }}
   state MASTER
   virtual_router_id 51
   priority {{ keepalived_priority }}

image/service/keepalived/container-start.sh

@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -ex
 
 FIRST_START_DONE="/etc/docker-keepalived-first-start-done"
 
@@ -13,6 +13,43 @@ if [ ! -e "$FIRST_START_DONE" ]; then
       exit 1
     else
       ln -s /osixia/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
+
+      #
+      # bootstrap config
+      #
+      sed -i "s|{{ keepalived_interface }}|$KEEPALIVED_INTERFACE|g" /etc/keepalived/keepalived.conf
+      sed -i "s|{{ keepalived_priority }}|$KEEPALIVED_PRIORITY|g" /etc/keepalived/keepalived.conf
+      sed -i "s|{{ keepalived_password }}|$KEEPALIVED_PASSWORD|g" /etc/keepalived/keepalived.conf
+
+      # unicast peers
+      KEEPALIVED_UNICAST_PEERS=($KEEPALIVED_UNICAST_PEERS)
+      for peer in "${KEEPALIVED_UNICAST_PEERS[@]}"
+      do
+        # it's just a peer
+        # stored in a variable
+        if [ -n "${!peer}" ]; then
+          sed -i "s|{{ peer_ip }}|${!peer}\n    {{ peer_ip }}|g" /etc/keepalived/keepalived.conf
+        # directly
+        else
+          sed -i "s|{{ peer_ip }}|${peer}\n    {{ peer_ip }}|g" /etc/keepalived/keepalived.conf
+        fi
+      done
+      sed -i "/{{ peer_ip }}/d" /etc/keepalived/keepalived.conf
+
+      # virtual ips
+      KEEPALIVED_VIRTUAL_IPS=($KEEPALIVED_VIRTUAL_IPS)
+      for vip in "${KEEPALIVED_VIRTUAL_IPS[@]}"
+      do
+        # it's just a peer
+        # stored in a variable
+        if [ -n "${!vip}" ]; then
+          sed -i "s|{{ floating_ip }}|${!vip}\n    {{ floating_ip }}|g" /etc/keepalived/keepalived.conf
+        # directly
+        else
+          sed -i "s|{{ floating_ip }}|${vip}\n    {{ floating_ip }}|g" /etc/keepalived/keepalived.conf
+        fi
+      done
+      sed -i "/{{ floating_ip }}/d" /etc/keepalived/keepalived.conf
     fi
   fi