Redis implement multi-ports and multiple instances for single operation

First, the installation of Redis-server

Since I am using the Ubuntu system for my current web machine, here is an example of Ubuntu, which can be installed directly using apt source redis-server

$ sudo apt-get install Redis-server
After the installation is complete, you can use the dpkg command to view the path where the files are located:

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$ sudo dpkg-l redis-server /. /etc /etc/default /etc/default/ Redis-server /etc/redis /etc/redis/redis.conf /etc/redis/sentinel.conf /ETC/INIT.D /etc/init.d/ Redis-server /ETC/LOGROTATE.D /etc/logrotate.d/redis-server /var /var/log /var/log/redis / Var/lib /var/lib/redis /usr /usr/bin /usr/bin/redis-server /usr/share /usr/share/man /usr /share/man/man1 /usr/share/man/man1/redis-server.1.gz /usr/share/doc /usr/share/doc/redis-server / Usr/share/doc/redis-server/copyright /usr/bin/redis-sentinel /usr/share/doc/redis-server/changelog. debian.gz

Where/usr/bin/redis-server is the program execution file,/etc/redis/redis.conf is the configuration file,/etc/init.d/redis-server is the self startup file. Single instance, you can start by Sudo/etc/init.d/redis-server start.

Second, run multiple instance Redis

The default configuration file contents are:

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$ Egrep-v ' ^#|^$ ' redis.conf Daemonize Yes Pidfile/var/run/redis/redis-server.pid Port 6379 Bind 127.0.0.1 Timeout 0 Tcp-keepalive 0 LogLevel Notice Logfile/var/log/redis/redis-server.log Databases 16 Save 900 1 Save 300 10 Save 60 10000 Stop-writes-on-bgsave-error Yes Rdbcompression Yes Rdbchecksum Yes Dbfilename Dump.rdb Dir/var/lib/redis Slave-serve-stale-data Yes Slave-read-only Yes Repl-disable-tcp-nodelay No Slave-priority 100 AppendOnly No Appendfilename "Appendonly.aof" Appendfsync everysec No-appendfsync-on-rewrite No Auto-aof-rewrite-percentage 100 Auto-aof-rewrite-min-size 64MB Lua-time-limit 5000 Slowlog-log-slower-than 10000 Slowlog-max-len 128 Notify-keyspace-events "" Hash-max-ziplist-entries 512 Hash-max-ziplist-value 64 List-max-ziplist-entries 512 List-max-ziplist-value 64 Set-max-intset-entries 512 Zset-max-ziplist-entries 128 Zset-max-ziplist-value 64 activerehashing Yes Client-output-buffer-limit Normal 0 0 0 Client-output-buffer-limit slave 256MB 64MB 60 Client-output-buffer-limit pubsub 32MB 8MB 60 Hz 10 Aof-rewrite-incremental-fsync Yes

The meaning of the parameters in the specific configuration file, you can refer to the Redis configuration file detailed. Suppose we now have to start two more Redis instances, listening on the port is 6378, 6376, only need to duplicate a copy of the redis.conf configuration file and make a modification and then through the Redis-server boot.

Take the Redis 6378 port as an example, only need to modify the following parts, other configuration department he still use the default can:

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Pidfile/var/run/redis/redis-server6378.pid Port 6378 Logfile/var/log/redis/redis-server6378.log dir/opt/redis6378 Vm-swap-file/opt/redis6378/redis.swap

The Dir store path can also be/var/lib/redis with the default location, but Dbfilename can no longer use the defaults Dump.rdb, you may use Dump6378.rdb. However, it is recommended that different Redis instances be stored in different paths.

After modifying the configuration file, you can start a new Redis instance by using the following command:

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# sudo/usr/bin/redis-server/etc/redis/redis6378.conf

However, after the boot, through the PS command view will find a problem, the original default Redis instance is started with the Redis user, and the new Redis instance will start with root.

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yang@crunchbang:/var/lib/redis$ PS Auxf|grep Redis Yang 4296 0.0 0.0 8060 864 pts/0 s+ 05:41 0:00 | _ grep Redis Redis 3837 0.0 0.0 35912 1492? SSL 05:22 0:00/usr/bin/redis-server/etc/redis/redis.conf Root 4275 0.0 0.0 35912 1480? SSL 05:37 0:00/usr/bin/redis-server/etc/redis/redis6378.conf

By looking at/etc/init.d/redis-server from the startup file, you will find that the statement that you use when starting at Start is:

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Start-stop-daemon--start--quiet--umask 007--pidfile $PIDFILE--chuid Redis:redis--exec $DAEMON--$DAEMON _args

Here again, you can draw a gourd. Copy sudo cp/etc/init.d/redis-server/etc/init.d/redis6378, and after the replication is complete, modify the following:

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Daemon_args=/etc/redis/redis6378.conf Name=redis-server Desc=redis6378-server Rundir=/var/run/redis pidfile= $RUNDIR/redis-server6378.pid

When you have finished modifying it, you can also start with the redis6378 configuration file. Then through the PS view, the discovery also will be a Redis user run the process. Want to add 6376, 6375 and so on more than one instance, also press the above method to operate on OK.

Here are the results of the test after you refer to this article yourself:

The default Redis program is installed in the/usr/local/redis directory;

Configuration file:/usr/local/redis/redis.conf, the port configured in this profile is the default port: 6379;

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Redis boot command path:/usr/local/bin/redis-server.

You can specify a port to start multiple Redis processes.

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#/usr/local/bin/redis-server --port 6380 & #启动6380端口的redis实例.

Multiple Redis instances need to be started:

A Redis server, divided into multiple nodes, each node assigned a port (6380,6381 ...) ), the default port is 6379.
Each node corresponds to a redis configuration file, such as: redis6380.conf, redis6381.conf

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#cp redis.confredis6380.conf #vi redis6380.conf Pidfile:pidfile/var/run/redis/redis_6380.pid Port 6380 Logfile:logfile/var/log/redis/redis_6380.log Rdbfile:dbfilenamedump_6380.rdb

(Other configuration files are similar to modifications)

To start multiple Redis instances:

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#redis-server /usr/local/redis/redis6380.conf #redis-server/usr/local/redis/redis6381.conf