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executable file
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#!/bin/bash
# make-cluster.sh
# This is a simple script used to automatically spin up a Redis cluster instance
# simplifying the process of running unit tests.
#
# Usage:
# ./make-cluster.sh start [host]
# ./make-cluster.sh stop [host]
#
BASEDIR=`pwd`
NODEDIR=$BASEDIR/nodes
MAPFILE=$NODEDIR/nodemap
REDIS_BINARY=${REDIS_BINARY:-redis-server}
# Host, nodes, replicas, ports, etc. Change if you want different values
HOST="127.0.0.1"
NOASK=0
NODES=12
REPLICAS=3
START_PORT=7000
END_PORT=`expr $START_PORT + $NODES`
# Helper to determine if we have an executable
checkExe() {
if ! hash $1 > /dev/null 2>&1; then
echo "Error: Must have $1 on the path!"
exit 1
fi
}
# Run a command and output what we're running
verboseRun() {
echo "Running: $@"
$@
}
# Spawn a specific redis instance, cluster enabled
spawnNode() {
# ACL file if we have one
if [ ! -z "$ACLFILE" ]; then
ACLARG="--aclfile $ACLFILE"
fi
# Attempt to spawn the node
verboseRun "$REDIS_BINARY" --cluster-enabled yes --dir $NODEDIR --port $PORT \
--cluster-config-file node-$PORT.conf --daemonize yes --save \'\' \
--bind $HOST --dbfilename node-$PORT.rdb $ACLARG
# Abort if we can't spin this instance
if [ $? -ne 0 ]; then
echo "Error: Can't spawn node at port $PORT."
exit 1
fi
}
# Spawn nodes from start to end port
spawnNodes() {
for PORT in `seq $START_PORT $END_PORT`; do
# Attempt to spawn the node
spawnNode $PORT
# Add this host:port to our nodemap so the tests can get seeds
echo "$HOST:$PORT" >> $MAPFILE
done
}
# Check to see if any nodes are running
checkNodes() {
echo -n "Checking port availability "
for PORT in `seq $START_PORT $END_PORT`; do
redis-cli -p $PORT ping > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo "FAIL"
echo "Error: There appears to be an instance running at port $PORT"
exit 1
fi
done
echo "OK"
}
# Create our 'node' directory if it doesn't exist and clean out any previous
# configuration files from a previous run.
cleanConfigInfo() {
verboseRun mkdir -p $NODEDIR
verboseRun rm -f $NODEDIR/*
if [ -f "$ACLFILE" ]; then
cp $ACLFILE $NODEDIR/$ACLFILE
fi
}
# Initialize our cluster with redis-trib.rb
initCluster() {
TRIBARGS=""
for PORT in `seq $START_PORT $END_PORT`; do
TRIBARGS="$TRIBARGS $HOST:$PORT"
done
if [[ ! -z "$USER" ]]; then
USERARG="--user $USER"
fi
if [[ ! -z "$PASS" ]]; then
PASSARG="-a $PASS"
fi
if [[ "$1" -eq "1" ]]; then
echo yes | redis-cli $USERARG $PASSARG -p $START_PORT --cluster create $TRIBARGS --cluster-replicas $REPLICAS
else
verboseRun redis-cli $USERARG $PASSARG -p $START_PORT --cluster create $TRIBARGS --cluster-replicas $REPLICAS
fi
if [ $? -ne 0 ]; then
echo "Error: Couldn't create cluster!"
exit 1
fi
}
# Attempt to spin up our cluster
startCluster() {
# Make sure none of these nodes are already running
checkNodes
# Clean out node configuration, etc
cleanConfigInfo
# Attempt to spawn the nodes
spawnNodes
# Attempt to initialize the cluster
initCluster $1
}
# Shut down nodes in our cluster
stopCluster() {
for PORT in `seq $START_PORT $END_PORT`; do
verboseRun redis-cli -p $PORT SHUTDOWN NOSAVE > /dev/null 2>&1
done
}
# Shut down nodes by killing them
killCluster() {
for PORT in `seq $START_PORT $END_PORT`; do
PID=$(ps aux|grep [r]edis-server|grep $PORT|awk '{print $2}')
echo -n "Killing $PID: "
if kill $PID; then
echo "OK"
else
echo "ERROR"
fi
done
}
printUsage() {
echo "Usage: make-cluster [OPTIONS] <start|stop|kill>"
echo
echo " Options"
echo
echo " -u Redis username to use when spawning cluster"
echo " -p Redis password to use when spawning cluster"
echo " -a Redis acl filename to use when spawning cluster"
echo " -y Automatically send 'yes' when starting cluster"
echo " -h This message"
echo
exit 0
}
checkExe "$REDIS_BINARY"
while getopts "u:p:a:hy" OPT; do
case $OPT in
h)
printUsage
;;
a)
if [ ! -f "$OPTARG" ]; then
echo "Error: '$OPTARG' is not a filename!"
exit -1
fi
ACLFILE=$OPTARG
;;
u)
USER=$OPTARG
;;
p)
PASS=$OPTARG
;;
h)
HOST=$OPTARG
;;
y)
NOASK=1
;;
*)
echo "Unknown option: $OPT"
exit 1
;;
esac
done
shift "$((OPTIND - 1))"
if [[ $# -lt 1 ]]; then
echo "Error: Must pass an operation (start or stop)"
exit -1
fi
case "$1" in
start)
startCluster $NOASK
;;
stop)
stopCluster
;;
kill)
killCluster
;;
*)
echo "Usage: make-cluster.sh [options] <start|stop>"
exit 1
;;
esac