Merge branch 'hotfix-0.1.1' into stable

CHANGELOG.md

@@ -1,4 +1,7 @@
 # Changelog
 
+## 0.1.1
+  - Add notify script
+
 ## 0.1.0
   - Initial release

Makefile

@@ -1,5 +1,5 @@
 NAME = osixia/keepalived
-VERSION = 0.1.0
+VERSION = 0.1.1
 
 .PHONY: all build test tag_latest release
 

README.md

@@ -5,6 +5,6 @@ A docker image to run Keepalived.
 
 ## Quick start
 
-This image need to be run with : --privileged --net=host
+This image require the kernel module ip_vs loaded on the host and need to be run with : --privileged --net=host
 
     docker run --privileged --net=host -d osixia/keepalived

image/env.yml

@@ -1,4 +1,4 @@
-KEEPALIVED_INTERFACE: p4p1
+KEEPALIVED_INTERFACE: eth0
 KEEPALIVED_PASSWORD: d0cker
 
 # for electing MASTER, highest priority wins.
@@ -7,6 +7,10 @@ KEEPALIVED_PRIORITY: 150
 
 KEEPALIVED_UNICAST_PEERS:
   - 192.168.1.10
+  - 192.168.1.11
 
 KEEPALIVED_VIRTUAL_IPS:
   - 192.168.1.231
+  - 192.168.1.232
+
+KEEPALIVED_NOTIFY: /osixia/keepalived/notify.sh

image/service/keepalived/assets/keepalived.conf

@@ -1,4 +1,12 @@
-vrrp_instance vip-1 {
+vrrp_sync_group VG_1 {
+  group {
+    VI_1
+  }
+
+  {{ keepalived_notify }}
+}
+
+vrrp_instance VI_1 {
   interface {{ keepalived_interface }}
 
   track_interface {

image/service/keepalived/assets/notify.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# for ANY state transition.
+# "notify" script is called AFTER the
+# notify_* script(s) and is executed
+# with 3 arguments provided by keepalived
+# (ie don't include parameters in the notify line).
+# arguments
+# $1 = "GROUP"|"INSTANCE"
+# $2 = name of group or instance
+# $3 = target state of transition
+#     ("MASTER"|"BACKUP"|"FAULT")
+
+TYPE=$1
+NAME=$2
+STATE=$3
+
+case $STATE in
+        "MASTER") logger "I'm the MASTER! Whup whup."
+                  exit 0
+                  ;;
+        "BACKUP") logger "Ok, i'm just a backup, great."
+                  exit 0
+                  ;;
+        "FAULT")  logger "Fault, what ?"
+                  exit 0
+                  ;;
+        *)        logger "Unknown state"
+                  exit 1
+                  ;;
+esac

image/service/keepalived/container-start.sh

@@ -22,6 +22,12 @@ if [ ! -e "$FIRST_START_DONE" ]; then
       sed -i "s|{{ keepalived_priority }}|$KEEPALIVED_PRIORITY|g" /etc/keepalived/keepalived.conf
       sed -i "s|{{ keepalived_password }}|$KEEPALIVED_PASSWORD|g" /etc/keepalived/keepalived.conf
 
+      if [ -n "$KEEPALIVED_NOTIFY" ]; then
+        sed -i "s|{{ keepalived_notify }}|notify \"$KEEPALIVED_NOTIFY\"|g" /etc/keepalived/keepalived.conf
+      else
+        sed -i "/{{ keepalived_notify }}/d" /etc/keepalived/keepalived.conf
+      fi
+
       # unicast peers
       KEEPALIVED_UNICAST_PEERS=($KEEPALIVED_UNICAST_PEERS)
       for peer in "${KEEPALIVED_UNICAST_PEERS[@]}"