primeinc
10/31/2014 - 9:39 AM
run multiple redis instances on the same server for centos 6.5 using Redis 2.8 from Remi
run multiple redis instances on the same server for centos 6.5 using Redis 2.8 from Remi
diff -u /etc/init.d/redis /etc/init.d/redis-001
--- /etc/init.d/redis 2014-09-21 02:09:40.000000000 -0400
+++ /etc/init.d/redis-001 2014-10-31 12:41:52.042578094 -0400
@@ -8,15 +8,15 @@
# Source function library.
. /etc/rc.d/init.d/functions
-name="redis-server"
-exec="/usr/bin/$name"
+name="redis-001"
+exec="/usr/bin/redis-server"
shut="/usr/bin/redis-shutdown"
-pidfile="/var/run/redis/redis.pid"
-REDIS_CONFIG="/etc/redis.conf"
+pidfile="/var/run/redis/redis-001.pid"
+REDIS_CONFIG="/etc/redis-001.conf"
[ -e /etc/sysconfig/redis ] && . /etc/sysconfig/redis
-lockfile=/var/lock/subsys/redis
+lockfile=/var/lock/subsys/redis-001
start() {
[ -f $REDIS_CONFIG ] || exit 6
@@ -31,7 +31,7 @@
stop() {
echo -n $"Stopping $name: "
- [ -x $shut ] && $shut
+ [ -x $shut ]
retval=$?
if [ -f $pidfile ]
then
- create a new redis .conf file
$ cp /etc/redis.conf /etc/redis-xxx.conf
- edit /etc/redis-xxx.conf, illustrated as below
...
#modify pidfile
#pidfile /var/run/redis/redis.pid
pidfile /var/run/redis/redis-xxx.pid
...
#dir /var/lib/redis/
dir /var/lib/redis-xxx/
...
#modify port
#port 6379
port 6380
...
#modify logfile
#logfile /var/log/redis/redis.log
logfile /var/log/redis/redis-xxx.log
- make dir /var/lib/redis-xxx
$ mkdir -p /var/lib/redis-xxx
- copy init script
$ cp /etc/init.d/redis /etc/init.d/redis-xxx
- edit the new init script
...
#pidfile="/var/run/redis/redis.pid"
pidfile="/var/run/redis/redis-xxx.pid"
...
#REDIS_CONFIG="/etc/redis.conf"
REDIS_CONFIG="/etc/redis-xxx.conf"
...
- query the status of this redis in
$ sudo service redis-xxx status
# server is stopped
# start service
$ sudo service redis-xxx start
- make redis-xxx service auto start
$ sudo chkconfig --level 3 redis-xxx on
#!/usr/bin/env bash
# will@prime.ms | Updated: 10/31/14
# usage: ./mkinstance.sh -h
# Based on the Redis 2.8.17-2.el6.remi
# TODO: Add overwrite arg for base conf
# TODO: Grab all replacements for sed from base conf file, currently assumes too many defaults
# TODO: Handle removal if instance was already removed once before
conf="/etc/redis.conf"
confdir=$(dirname "$conf")
initd="/etc/init.d"
logdir="/var/log/redis"
redis_server="/usr/bin/redis-server"
max=-1
usage() {
echo "Create new instance for Redis based on $conf"; echo
echo "./mkinstance.sh args"
echo "-i=[001] --instance=[001]"
echo " Specify the instance number"
echo "-a --auto"
echo " Automatically increments the instance"
echo "-d=[path] --datadir=[path]"
echo " Specify data directory for redis"
echo "-v --verbose"
echo " Display generated commands before creating instance"
echo "-r --remove"
echo " Removes the instance (moves data)"
echo "-h --help"
echo " This screen"
}
function coloredEcho(){
local exp=$1;
local color=$2;
if ! [[ $color =~ ^[0-9]$ ]] ; then
case $(echo "$color" | tr '[:upper:]' '[:lower:]') in
black) color=0 ;;
red) color=1 ;;
green) color=2 ;;
yellow) color=3 ;;
blue) color=4 ;;
magenta) color=5 ;;
cyan) color=6 ;;
white|*) color=7 ;; # white or invalid color
esac
fi
tput setaf $color;
echo "$exp";
tput sgr0;
}
while [ "$1" != "" ]; do
PARAM=$(echo "$1" | awk -F= '{print $1}')
VALUE=$(echo "$1" | awk -F= '{print $2}')
case $PARAM in
-h | --help)
usage
exit
;;
-i | --instance)
if [ -n "$VALUE" ] ; then
instance=$((10#$VALUE))
instance=$(printf "%03d" $instance)
else
coloredEcho "ERROR: Missing value for instance" red
usage
exit 1
fi
;;
-a | --auto)
auto="Y"
;;
-r | --remove)
remove="Y"
;;
-v | --verbose)
verbose="Y"
;;
-d | --datadir)
if [ -n "$VALUE" ] ; then
custom_datadir="$VALUE"
else
coloredEcho "ERROR: Missing value for custom data directory" red
usage
exit 1
fi
;;
-p | --port)
if [ -n "$VALUE" ] ; then
custom_port="$VALUE"
else
coloredEcho "ERROR: Missing value for custom port" red
usage
exit 1
fi
;;
*)
coloredEcho "ERROR: unknown parameter \"$PARAM\"" red
usage
exit 1
;;
esac
shift
done
#check to make sure redis is installed
if ! [ -f "$redis_server" ] ; then
coloredEcho "ERROR: can't find redis-server, is it installed?" red
echo "I'm looking for it here: $redis_server"
exit 1
fi
for file in $confdir/redis-*.conf
do
num=${file:11}
num=${num%.conf}
re='^[0-9]+$'
if ! [[ $num =~ $re ]] ; then
num=0
fi
[[ $((10#$num)) -gt $((10#$max)) ]] && max=$num
done
if [[ $max == 0 ]] ; then
maxconf="$conf"
coloredEcho "WARNING: No instances!" yellow
else
maxconf="$confdir/redis-$max.conf"
fi
if [[ $auto == [Y] ]] ; then
instance=$((10#$max + 1))
instance=$(printf "%03d" $instance)
elif ! [ -n "$instance" ] ; then
coloredEcho "ERROR: instance not set (use --auto or --instance=XXX)" red; echo
usage
exit 1
fi
##get defaults
if [ -n "$custom_datadir" ] ; then
if [ -d "$custom_datadir" ] ; then
dir="$(unset CDPATH && cd "$custom_datadir" && pwd)"
new_data_dir="$dir"
else
parent_custom_dir="$(dirname "$custom_datadir")"
parent_custom_base="$(basename "$custom_datadir")"
new_data_dir="$parent_custom_dir/$parent_custom_base"
fi
else
datadir=$(awk '/^[[:blank:]]*dir/ { print $2 }' "$conf") #get datadir of base install
new_data_dir="$(dirname "$datadir")"
fi
port=$(awk '/^[[:blank:]]*port/ { print $2 }' "$conf") #get port to replace
if [ -n "$custom_port" ] ; then
newport="$custom_port"
else
newport=$(awk '/^[[:blank:]]*port/ { print $2 }' "$maxconf") #needs to get last port used
((newport+=1))
fi
if [ -n "$remove" ] && [ -n "$instance" ] && [ -z "$auto" ]; then
conf="$confdir/redis-$instance.conf"
if [ -f "$conf" ] ; then
confdir=$(dirname "$conf")
datadir=$(awk '/^[[:blank:]]*dir/ { print $2 }' "$conf") #get datadir of instance
if [ -d "$datadir" ] ; then
new_data_dir="$(dirname "$datadir")"
echo; echo;
echo "##########################################"
echo "## PENDING REMOVAL OF INSTANCE ##"
echo "##########################################"
echo; echo;
echo "Moving: $datadir --> $new_data_dir/redis-archive/$instance/"
echo "Moving: $confdir/redis-$instance.conf --> $new_data_dir/redis-archive/$instance/$instance.conf"
echo "Moving: $initd/redis-$instance --> $new_data_dir/redis-archive/$instance/$instance.init"
echo; echo;
read -p "Remove $instance? [y/N]: " -n 1 -r; echo
if [[ $REPLY =~ ^[Yy]$ ]] ; then
echo "Stopping redis-$instance service & removing chkconfig"
service "redis-$instance" stop
chkconfig --del "redis-$instance"
echo "Moving files of $instance"
mkdir -p "$new_data_dir/redis-archive/$instance/"
mv "$datadir" "$new_data_dir/redis-archive/$instance/"
mv "$confdir/redis-$instance.conf" "$new_data_dir/redis-archive/$instance/$instance.conf"
mv "$initd/redis-$instance" "$new_data_dir/redis-archive/$instance/$instance.init"
coloredEcho "Done." green; echo
exit
else
echo 'CANCELED... No changes made.'
exit 1
fi
else
coloredEcho "ERROR: Couldn't find data dir for instance $instance" red
echo "You should manually remove this instance"
echo; coloredEcho "This is what we would have run:" green; echo;
echo "service redis-$instance stop"
echo "chkconfig --del redis-$instance"
echo "mkdir -p $new_data_dir/redis-archive/$instance/"
coloredEcho "mv $datadir $new_data_dir/redis-archive/$instance/" red
echo "mv $confdir/redis-$instance.conf" "$new_data_dir/redis-archive/$instance/$instance.conf"
echo "mv $initd/redis-$instance" "$new_data_dir/redis-archive/$instance/$instance.init"
echo;
exit 1
fi
else
echo "ERROR: Couldn't find conf file for instance $instance"
exit 1
fi
elif [ -n "$remove" ] && [ -z "$auto" ]; then
coloredEcho "Error: You must can't use --auto when using --remove" red
exit 1
fi
if [ -f "$confdir/redis-$instance.conf" ] ; then
echo "$confdir/redis-$instance.conf exists."
exit
fi
echo; echo;
coloredEcho "##########################################" cyan
coloredEcho "## PENDING CONFIGURATION SETTINGS ##" cyan
coloredEcho "##########################################" cyan
echo; echo;
echo "Max instance conf file found = $maxconf"
echo "New instance conf = $confdir/redis-$instance.conf"
echo "Sub Dir for data $new_data_dir"
echo "New Data Dir $new_data_dir/redis-$instance/"
echo "New Port $newport"
echo; echo;
read -p "Is the configuration correct? [y/N]: " -n 1 -r; echo
if ! [[ $REPLY =~ ^[Yy]$ ]] ; then
coloredEcho 'CANCELED... No changes made.' red
exit 1
fi
#commands to run
if [ -n "$verbose" ] ; then
echo; echo;
coloredEcho "##########################################" green
coloredEcho "## RUNNING THE FOLLOWING COMMANDS ##" green
coloredEcho "##########################################" green
echo; echo;
echo "cp $conf $confdir/redis-$instance.conf"
echo "mkdir -p $new_data_dir/redis-$instance"
echo "chown redis $new_data_dir/redis-$instance"
echo "cp $initd/redis $initd/redis-$instance"
echo "sed -i -e 's/#.*$//' -e '/^$/d' \"$confdir/redis-$instance.conf\""
echo "sed -i \"s,/var/run/redis.pid,/var/run/redis-$instance.pid,\" \"$confdir/redis-$instance.conf\""
echo "sed -i \"s,$datadir,$new_data_dir/redis-$instance/,\" \"$confdir/redis-$instance.conf\""
echo "sed -i \"s,port $port,port $newport,\" \"$confdir/redis-$instance.conf\""
echo "sed -i \"s,logfile $logdir/redis.log,logfile $logdir/redis-$instance.log,\" \"$confdir/redis-$instance.conf\""
echo "sed -i \"s,name=\"redis-server\",name=\"redis-$instance\",\" \"$initd/redis-$instance\""
echo "sed -i \"s,exec=\"/usr/bin/\$name\",exec=\"/usr/bin/redis-server\",\" \"$initd/redis-$instance\""
echo "sed -i \"s,pidfile=\"/var/run/redis/redis.pid\",pidfile=\"/var/run/redis/redis-$instance.pid\",\" \"$initd/redis-$instance\""
echo "sed -i \"s,REDIS_CONFIG=\"$confdir/redis.conf\",REDIS_CONFIG=\"$confdir/redis-$instance.conf\",\" \"$initd/redis-$instance\""
echo "sed -i \"s,lockfile=/var/lock/subsys/redis,lockfile=/var/lock/subsys/redis-$instance,\" \"$initd/redis-$instance\""
echo "sed -i \"s,'&& \$shut','',\" \"$initd/redis-$instance\""
echo; echo;
read -p "Does this look correct? [y/N]: " -n 1 -r; echo
if ! [[ $REPLY =~ ^[Yy]$ ]] ; then
coloredEcho 'CANCELED... No changes made.' red
exit 1
fi
fi
#copy files
echo "Copying $conf to $confdir/redis-$instance.conf"
cp "$conf" "$confdir/redis-$instance.conf"
echo "Making directories for new instance $instance"
mkdir -p "$new_data_dir/redis-$instance"
chown redis "$new_data_dir/redis-$instance"
cp "$initd/redis" "$initd/redis-$instance"
echo "Erasing comments and blank lines from conf"
sed -i -e 's/#.*$//' -e '/^$/d' "$confdir/redis-$instance.conf"
echo "Replacing conf values for $instance"
sed -i "s,/var/run/redis.pid,/var/run/redis-$instance.pid," "$confdir/redis-$instance.conf"
sed -i "s,$datadir,$new_data_dir/redis-$instance/," "$confdir/redis-$instance.conf"
sed -i "s,port $port,port $newport," "$confdir/redis-$instance.conf"
sed -i "s,logfile $logdir/redis.log,logfile $logdir/redis-$instance.log," "$confdir/redis-$instance.conf"
sed -i "s,name=\"redis-server\",name=\"redis-$instance\"," "$initd/redis-$instance"
sed -i "s,exec=\"/usr/bin/\$name\",exec=\"/usr/bin/redis-server\"," "$initd/redis-$instance"
sed -i "s,pidfile=\"/var/run/redis/redis.pid\",pidfile=\"/var/run/redis/redis-$instance.pid\"," "$initd/redis-$instance"
sed -i "s,REDIS_CONFIG=\"$confdir/redis.conf\",REDIS_CONFIG=\"$confdir/redis-$instance.conf\"," "$initd/redis-$instance"
sed -i "s,lockfile=/var/lock/subsys/redis,lockfile=/var/lock/subsys/redis-$instance," "$initd/redis-$instance"
sed -i s,'&& $shut','', "$initd/redis-$instance" #remove the second $shut which would shutdown the default redis server
coloredEcho "Finished!" green; echo;
read -p "Show Diff? [y/N]: " -n 1 -r; echo
if [[ $REPLY =~ ^[Yy]$ ]] ; then
diff -u "$conf" "$confdir/redis-$instance.conf"; echo
diff -u "$initd/redis" "$initd/redis-$instance"; echo
else
coloredEcho 'Show diff with:' yellow
echo "diff -u $conf $confdir/redis-$instance.conf"
echo "diff -u $initd/redis $initd/redis-$instance"; echo
fi
read -p "Start new instance? [y/N]: " -n 1 -r; echo
if [[ $REPLY =~ ^[Yy]$ ]] ; then
service "redis-$instance" start
service "redis-$instance" status; echo
else
coloredEcho 'Instance not started' yellow
echo 'Start it with:'
echo "service redis-$instance start"; echo
fi
read -p "Start on boot? [y/N]: " -n 1 -r; echo
if [[ $REPLY =~ ^[Yy]$ ]] ; then
chkconfig --level 3 "redis-$instance" on
coloredEcho 'Instance will start on boot' green; echo
else
coloredEcho 'Instance wont start on boot' yellow
echo 'Enable it with:'
echo "chkconfig --level 3 redis-$instance on"; echo
fi
coloredEcho "New files/folders created for this instance:" cyan
echo "$new_data_dir/redis-$instance/"
echo "$confdir/redis-$instance.conf"
echo "$initd/redis-$instance"
echo
exit