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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
# Host, nodes, replicas, ports, etc. Change if you want different values
HOST="127.0.0.1"
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() {
# Attempt to spawn the node
verboseRun redis-server --cluster-enabled yes --dir $NODEDIR --port $PORT \
--cluster-config-file node-$PORT.conf --daemonize yes --save \'\' \
--bind $HOST --dbfilename node-$PORT.rdb
# 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/*
}
# Initialize our cluster with redis-trib.rb
initCluster() {
TRIBARGS=""
for PORT in `seq $START_PORT $END_PORT`; do
TRIBARGS="$TRIBARGS $HOST:$PORT"
done
verboseRun redis-trib.rb create --replicas $REPLICAS $TRIBARGS
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
}
# 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
}
# Make sure we have redis-server and redis-trib.rb on the path
checkExe redis-server
checkExe redis-trib.rb
# Override the host if we've got $2
if [[ ! -z "$2" ]]; then
HOST=$2
fi
# Main entry point to start or stop/kill a cluster
case "$1" in
start)
startCluster
;;
stop)
stopCluster
;;
*)
echo "Usage $0 <start|stop> [host]"
;;
esac
|
