1 files changed, 87 insertions, 0 deletions
diff --git a/hooks/replica-set-relation-changed b/hooks/replica-set-relation-changed
new file mode 100755
index 0000000..d32293f
--- /dev/null
+++ b/hooks/replica-set-relation-changed
@@ -0,0 +1,87 @@
+#!/bin/bash
+# This must be renamed to the name of the relation. The goal here is to
+# affect any change needed by relationships being formed, modified, or broken
+# This script should be idempotent.
+
+############################################################################################################
+# Set debugging information
+############################################################################################################
+set -ux
+
+############################################################################################################
+# Set some global variables
+############################################################################################################
+MY_HOSTNAME=`hostname -f`
+MY_REPLSET=`facter replset-name`
+MY_INSTALL_TIME=`facter install-time`
+
+MASTER_HOSTNAME=${MY_HOSTNAME}
+MASTER_REPLSET=${MY_REPLSET}
+MASTER_INSTALL_TIME=${MY_INSTALL_TIME}
+
+echo "My hosntmae: ${MY_HOSTNAME}"
+echo "My ReplSet: ${MY_REPLSET}"
+echo "My install time: ${MY_INSTALL_TIME}"
+
+############################################################################################################
+# Here we need to find out which is the first node ( we record the install time ).
+# The one with the lowest install time is the master.
+# Initialize the master node.
+# Add the other nodes to the master's replica set.
+############################################################################################################
+# Find the master ( lowest install time )
+for MEMBER in `relation-list`
+do
+ HOSTNAME=`relation-get hostname ${MEMBER}`
+ REPLSET=`relation-get replset ${MEMBER}`
+ INSTALL_TIME=`relation-get install-time ${MEMBER}`
+ [ ${INSTALL_TIME} -lt ${MASTER_INSTALL_TIME} ] && MASTER_INSTALL_TIME=${INSTALL_TIME}
+done
+
+echo "Master install-time: ${MASTER_INSTALL_TIME}"
+
+# We should now have the lowest member of this relationship. Let's get all of the information about it.
+for MEMBER in `relation-list`
+do
+ HOSTNAME=`relation-get hostname ${MEMBER}`
+ REPLSET=`relation-get replset ${MEMBER}`
+ INSTALL_TIME=`relation-get install-time ${MEMBER}`
+ if [ ${INSTALL_TIME} -eq ${MASTER_INSTALL_TIME} ]; then
+ MASTER_HOSTNAME=${HOSTNAME}
+ MASTER_REPLSET=${REPLSET}
+ fi
+done
+
+echo "Master Hostname: ${MASTER_HOSTNAME}"
+echo "Master ReplSet: ${MASTER_REPLSET}"
+echo "Master install time: ${MASTER_INSTALL_TIME}"
+
+# We should now have all the information about the master node.
+# If the node has already been initialized, it will just inform you
+# about it with no other consequence.
+if [ ${MASTER_INSTALL_TIME} -eq ${MY_INSTALL_TIME} ]; then
+ mongo --eval "rs.initiate()"
+else
+ mongo --host ${MASTER_HOSTNAME} --eval "rs.initiate()"
+fi
+
+# Now we need to add the rest of nodes to the replica set
+for MEMBER in `relation-list`
+do
+ HOSTNAME=`relation-get hostname ${MEMBER}`
+ REPLSET=`relation-get replset ${MEMBER}`
+ INSTALL_TIME=`relation-get install-time ${MEMBER}`
+ if [ ${MASTER_INSTALL_TIME} -ne ${INSTALL_TIME} ]; then
+ if [ ${INSTALL_TIME} -eq ${MY_INSTALL_TIME} ]; then
+ mongo --eval "rs.add(\""${HOSTNAME}"\")"
+ else
+ mongo --host ${MASTER_HOSTNAME} --eval "rs.add(\""${HOSTNAME}"\")"
+ fi
+ fi
+done
+
+echo $ENSEMBLE_REMOTE_UNIT modified its settings
+echo Relation settings:
+relation-get
+echo Relation members:
+relation-list