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#!/bin/bash
set -eux
# By default we install from the main Ubuntu archive.
source=`config-get source`
case $source in
archive)
juju-log "Configuring zookeeper using the Ubuntu archive packages..."
zk_package="zookeeperd"
zk_service="zookeeper"
zk_conf="/etc/zookeeper/conf/zoo.cfg"
zk_myid="/etc/zookeeper/conf/myid"
zk_install="/etc/init/zookeeper.conf"
;;
dev|testing|stable)
juju-log "Configuring zookeeper using the Hadoop Ubuntu Team PPA..."
zk_package="hadoop-zookeeper-server"
zk_service="hadoop-zookeeper-server"
zk_conf="/etc/hadoop-zookeeper/conf/zoo.cfg"
zk_myid="/etc/hadoop-zookeeper/conf/myid"
zk_install="/etc/init/hadoop-zookeeper-server.conf"
;;
*)
juju-log "Unsupported source..."
exit 1
;;
esac
base_packages="ntp"
zk_port="`config-get zk-port`"
configure_sources () {
source=`config-get source`
case $source in
archive)
juju-log "Configuring zookeeper using the Ubuntu archive packages..."
;;
dev|testing|stable)
juju-log "Configuring zookeeper using the Hadoop Ubuntu Team PPA..."
add-apt-repository ppa:hadoop-ubuntu/$source
apt-get update
;;
*)
juju-log "Unsupported source..."
exit 1
;;
esac
}
install_zookeeper () {
juju-log "Installing ZooKeeper..."
apt-get install -y $zk_package $base_packages
}
configure_zookeeper () {
juju-log "Purging any standalone configuration..."
# Purge
sed -i "/^server./d" $zk_conf
sed -i "/^weight./d" $zk_conf
sed -i "/^group./d" $zk_conf
juju-log "Generating unique ID for this instance..."
unit_no=`echo $JUJU_UNIT_NAME | cut -d / -f 2`
default_weight=`config-get default_weight`
default_group=`config-get default_group`
echo $unit_no > $zk_myid
juju-log "Adding this unit to the quorum..."
hostname=`unit-get private-address`
# Add the config
echo "server.${unit_no}=${hostname}:2888:3888" >> $zk_conf
echo "group.${default_group}=${unit_no}" >> $zk_conf
echo "weight.${unit_no}=${default_weight}" >> $zk_conf
# Expose port as required
open-port $zk_port
}
# Service Control Commands
restart_zookeeper () {
juju-log "Restarting ZooKeeper"
service $zk_service status && service $zk_service restart || :
}
start_zookeeper() {
juju-log "Starting ZooKeeper"
service $zk_service status || service $zk_service start
}
stop_zookeeper() {
juju-log "Stopping ZooKeeper"
service $zk_service stop || :
}
update_group() {
member_id=$1
[ -z ${member_id} ] && return 0
default_group=`config-get default_group`
group_arr=( $(grep "group.${default_group}" ${zk_conf} | awk -F'=' '{ print $2 }' | tr ":" "\n") )
member_found="no"
for member in "${group_arr[@]}"
do
[ "${member_id}" == "${member}" ] && member_found="yes"
done
[ "${member_found}" == "no" ] && group_arr=("${group_arr[@]}" "${member_id}")
retVal="group.${default_group}=${group_arr[@]}"
retVal=`echo ${retVal} | tr " " ":"`
sed -i "s/^group.${default_group}.*/${retVal}/" ${zk_conf}
sed -i "s/^group.${default_group}=:/group.${default_group}=/" ${zk_conf}
}
update_external_server() {
# Add extra server ( if configured )
external_server=`config-get external_server`
if [[ "${external_server}" != "" ]]; then
external_id=`echo ${external_server} | cut -d : -f 1`
external_group=`echo ${external_server} | cut -d : -f 2`
if [[ "${external_group}" == "default" ]]; then
external_group=`config-get default_group`
fi
external_weight=`echo ${external_server} | cut -d : -f 3`
external_host=`echo ${external_server} | cut -d : -f 4`
external_port1=`echo ${external_server} | cut -d : -f 5`
external_port2=`echo ${external_server} | cut -d : -f 6`
sed -i "/^server.${external_id}/d" $zk_conf
sed -i "/^weight.${external_id}/d" $zk_conf
echo "server.${external_id}=${external_host}:${external_port1}:${external_port2}" >> $zk_conf
update_group ${external_id}
echo "weight.${external_id}=${external_weight}" >> $zk_conf
open-port ${external_port1}
open-port ${external_port2}
fi
}
update_quorum() {
default_group=`config-get default_group`
default_weight=`config-get default_weight`
# Purge out existing quorum config to deal with departure of
# ZK nodes
sed -i "/^server./d" $zk_conf
sed -i "/^weight./d" $zk_conf
sed -i "/^group./d" $zk_conf
# Add this node back into the list
juju-log "Adding this unit to the quorum..."
unit_no=`echo $JUJU_UNIT_NAME | cut -d / -f 2`
hostname=`unit-get private-address`
server_arr[0]="server.${unit_no}=${hostname}:2888:3888"
weight_arr[0]="weight.${unit_no}=${default_weight}"
group_arr[0]=${unit_no}
# Re-create based on current relations
for member in `relation-list`
do
juju-log "Adding $member to quorum"
member_id=`echo ${member} | cut -d / -f 2`
member_hostname=`relation-get private-address ${member}`
server_arr=("${server_arr[@]}" "server.${member_id}=${member_hostname}:2888:3888")
weight_arr=("${weight_arr[@]}" "weight.${member_id}=${default_weight}")
group_arr=("${group_arr[@]}" "${member_id}")
done
# Dump the new config
# servers
for server_line in "${server_arr[@]}"
do
echo "${server_line}" >> ${zk_conf}
done
# weight
for member_line in "${weight_arr[@]}"
do
echo "${member_line}" >> $zk_conf
done
# group
echo "group.${default_group}=${group_arr[@]}" | tr " " ":" >> $zk_conf
}
setup_zk_interface() {
juju-log "Setup ZooKeeper Client"
relation-set port=$zk_port
}
COMMAND=`basename $0`
case $COMMAND in
install)
configure_sources
install_zookeeper
configure_zookeeper
update_external_server
restart_zookeeper
;;
config-changed)
update_external_server
restart_zookeeper
;;
start)
start_zookeeper
;;
stop)
stop_zookeeper
;;
quorum-relation-joined)
;;
quorum-relation-changed|quorum-relation-departed)
update_quorum
update_external_server
restart_zookeeper
;;
zookeeper-relation-joined)
setup_zk_interface
;;
upgrade-charm)
configure_zookeeper
update_external_server
restart_zookeeper
;;
*)
juju-log "Command not recognised"
;;
esac
|
