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FOR MULTIPLE REDIS INSTANCE INSTALLATION ON RHEL7+ USE THE FOLLOWING PATHS AND SETUP PROCESS:

• 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

...
#modify vm-swap-file
#vm-swap-file /tmp/redis.swap
vm-swap-file /tmp/redis-xxx.swap
...

• make dir /var/lib/redis-xxx

$ mkdir -p /var/lib/redis-xxx

• THERE IS NO init.d files RHEL uses systemctl instead so:
• copy existing service over to your new service

$ cp /usr/lib/systemd/system/redis.service /usr/lib/systemd/system/redis-xxx.service

• modify your new service script to the following: (just change the redis-xxx path)

...

#[Unit]
Description=Redis persistent key-value database
After=network.target

#[Service]
ExecStart=/usr/bin/redis-server /etc/redis-xxx.conf --daemonize no
ExecStop=/usr/bin/redis-shutdown
User=redis
Group=redis

#[Install]
WantedBy=multi-user.target
...

• if you have sentinel enabled on your system you will need to: (otherwise skip this step)

# Copy values from cat /usr/lib/systemd/system/redis.service to /usr/lib/systemd/system/redis-xxx.service
$ cp /usr/lib/systemd/system/redis.service /usr/lib/systemd/system/redis-xxx.service

• then edit the contents of /usr/lib/systemd/system/redis-xxx.service (just change the /etc/redis-xxx path again)

• start the new services:

$ service redis-xxx start

• check the new services status:

$ service redis-xxx status

• stop the new services status:

$ service redis-xxx stop

• restart the new services status:

$ service redis-xxx restart

• if you get some problems with service not found:
• you can do the following:

$ systemctl unmask packagekit.service
$ systemctl mask packagekit.service

• then try to start the service again