Linux (Centos7) to build a distributed cluster under redis5

Note: You can view the official website to see Redis Cluster Setup mode, connected as follows

https://redis.io/topics/cluster-tutorial

There should be at least three cluster nodes, each node has a backup node. Need six servers.

If the condition is limited, you can build pseudo-distributed, the following steps are Redis cluster structures have six nodes on a Linux server.

Preparation: install dependencies

[root@localhost ~]#yum install -y gcc g++ make gcc-c++ kernel-devel automake autoconf libtool make wget tcl vim unzip git

1. Create a project catalog in hand into

命令：mkdir /usr/local/redis-cluster

Command: cd / usr / local / redis-cluster

2. Download and unpack compile source packages installed

Command: wget http://download.redis.io/releases/redis-5.0.5.tar.gz # version installed redis5.0.5

Command: tar -zvxf Redis-5.0.5.tar.gz unpack #

3. Go to the directory where redis, began to compile and install

Command: cd redis-5.0.5 # to enter the directory has the Makefile if you can compile and install the

Command: make # compiler

Command: make install PREFIX = / usr / local / redis # compiler installation and redis placed under / usr / local / redis, this can be directly used redis

Well, now successfully installed redis

4. Create six redis configuration file (note: 6 profile can not be placed in the same directory)

命令：[root@localhost redis-5.0.5]# cp redis.conf /usr/local/redis

命令：[root@localhost redis-5.0.5]# cp redis.conf /usr/local/redis/bin

命令：[root@localhost redis-5.0.5]# cd /usr/local/redis

命令：[root@localhost redis]# cp -r bin /usr/local/redis-cluster/redis01

命令：[root@localhost redis]# cd /usr/local/redis-cluster/redis01

Command: [root @ localhost redis01] # vim redis.conf # modify the configuration file

Modify the path to the configuration file:

1) port 7001 # port

2) cluster-enabled yes # Enable cluster mode

3) cluster-config-file nodes.conf # Set the corresponding port is not entered, the port is the default port

4) cluster-node-timeout 5000 # timeout

5) appendonly yes # open persistent mode

6) daemonize yes # running in the background

7) protected-mode no # non-protected mode

8) pidfile /var/run/redis_7001.pid # prevent multiple processes start copies, only to start 7001

(Knowledge expansion: the process runs .pid file will add a file lock, the lock process gets only have write permission (F_WRLCK),

The pid written to the file itself, the other trying to get the lock process will automatically exit. )

9) bind 172.20.10.7 # 127.0.0.1 to local ip, ip a view available ifconfig or ip

This profile has already done, then save and exit, and then create an additional five nodes

5. Create the other five nodes

Command: cd / usr / local / redis-cluster / # enter the directory redis

[root@localhost redis-cluster]# cp -r redis01 redis02
[root@localhost redis-cluster]# cp -r redis01 redis03
[root@localhost redis-cluster]# cp -r redis01 redis04
[root@localhost redis-cluster]# cp -r redis01 redis05
[root@localhost redis-cluster]# cp -r redis01 redis06 #将配置目录复制5份

Then modify the configuration file: port and modifications are pidfile under the redis.conf redis02 ~ redis06

Modify the content:

1）port 7001

2）pidfile /var/run/redis_7001.pid

6. Start node

There are two ways to start

1) respectively to redis01, redis02, ... redis06 directory, execute: ./redis-server ./redis.conf

2) Make a script execution start-all.sh

Script reads as follows:

cd redis01
./redis-server redis.conf
cd ..
cd redis02
./redis-server redis.conf
cd ..
cd redis03
./redis-server redis.conf
cd ..
cd redis04
./redis-server redis.conf
cd ..
cd redis05
./redis-server redis.conf
cd ..
cd redis06
./redis-server redis.conf
cd ..

Then add permissions to execute the script on the line

Command: chmod u + x start-all.sh # add permissions to the script

Command: ./ start-all.sh

Then look at the way if the node starts successfully

Command: ps aux | grep redis

7. Start Cluster

Because this redis redis-cli file directory 5.0.0 version of the above we use Redis cluster built just need to compile the catalog copy to redis-cluster come on it

As for redis-cli can be found at /usr/local/redis-cluster/redis-5.0.5/src, and then copied to / usr / local / redis-cluster on it

命令：cp -r /usr/local/redis-cluster/redis-5.0.5/src/redis-cli /usr/local/redis-cluster

命令：/usr/local/redis-cluster/redis-cli --cluster create 192.168.100.248:7001 192.168.100.248:7002 192.168.100.248:7003 192.168.100.248:7004

192.168.100.248:7005 192.168.100.248:7006 --cluster-replicas 1 # start command (Note: Starting in accordance with their own IP)

To this place, finished it redis cluster started successfully

8. The operation of the cluster

Shut down the cluster, write a script file in the create-cluster directory: vim shutdown.sh

Script reads as follows:

/ usr / local / Redis-Cluster / Redis -C -H 192.168.100.248 -p-CLI the shutdown 7001
/ usr / local / Redis-Cluster / Redis -C -H 192.168.100.248 -p-CLI the shutdown 7002
/ usr / local / Redis-Cluster / Redis -C -H 192.168.100.248 -p-CLI the shutdown 7003
/ usr / local / Redis-Cluster / Redis -C -H 192.168.100.248 -p-CLI the shutdown 7004
/ usr / local / Redis-Cluster / Redis-cli -c -h 192.168.100.248 7005 the shutdown -p
/ usr / local / Redis-Cluster / Redis-cli -p 7006 -c -h 192.168.100.248 the shutdown
and then to add the script and execute permissions to this file

Command: chmod u + x shutdown.sh

Command: ./ shutdown.sh

Redis View cluster status

Command: ps aux | grep redis

Knowledge expansion:

官方：/usr/local/redis-cluster/redis-cli -a xxx -c -h 192.168.100.248 -p 7001

Tip: -a password to access the server, -c represent cluster model, -h specify the ip address, -p specify the port number

9. Restart the cluster

At the end add start-all.sh script / usr / local / redis-cluster / redis-cli --cluster create 192.168.100.248:7001 192.168.100.248:7002 192.168.100.248:7003

192.168.100.248:7004 192.168.100.248:7005 192.168.100.248:7006 --cluster-replicas Note: Use your own IP of the machine