Redis cluster installation

Time：2021-12-23

Installation steps of redis cluster

Note: redis has been installed before the single node installation

1. Create installation directory

Create in master, node1 and node2 respectively
　　　

mkdir /usr/local/soft/redis-cluster

2. Copy redis to the redis cluster directory and change the name to 7000

cp -r /usr/local/soft/redis /usr/local/soft/redis-cluster
mv /usr/local/soft/redis-cluster/redis /usr/local/soft/redis-cluster/7000
Delete stand-alone cache files
rm -rf appendonly.aof
rm -rf dump.rdb

3. Modify the configuration file VIM redis conf

Daemon yes // redis runs in the background
pidfile /var/run/redis_ 7000.pid // pidfile file corresponds to 7000
Port 7000 // port 7000
Cluster enabled yes // enable the cluster and # remove the comments
cluster-config-file nodes. Conf // the configuration file of the cluster is automatically generated for the first time
Cluster node timeout 5000 // setting the request timeout to 5 seconds is enough
Appendonly yes // AOF log is enabled when necessary. It will record a log every time it writes (fully persistent)

4. Copy 7000
cp -r 7000 7001
cp -r 7000 7002
cp -r 7000 7003
cp -r 7000 7004
cp -r 7000 7005

5. Modify the configuration of each

vim 7001/bin/redis.conf
Change 7000 to the corresponding port number
pidfile /var/run/redis_7001.pid
port 7001

6. Copy to node1 at 70027003

scp -r /usr/local/soft/redis-cluster/7002 node1:/usr/local/soft/redis-cluster/
scp -r /usr/local/soft/redis-cluster/7003 node1:/usr/local/soft/redis-cluster/

7. Copy to node2 at 70047005

scp -r /usr/local/soft/redis-cluster/7004 node2:/usr/local/soft/redis-cluster/
scp -r /usr/local/soft/redis-cluster/7005 node2:/usr/local/soft/redis-cluster/

8. Start redis

Note: before starting, remember to kill the redis service running on a single node

1. Execute in master
cd /usr/local/soft/redis-cluster/7000/bin
./redis-server redis.conf
cd /usr/local/soft/redis-cluster/7001/bin
./redis-server redis.conf

2. Execute in node1
cd /usr/local/soft/redis-cluster/7002/bin
./redis-server redis.conf
cd /usr/local/soft/redis-cluster/7003/bin
./redis-server redis.conf

3. Execute in node2
cd /usr/local/soft/redis-cluster/7004/bin
./redis-server redis.conf
cd /usr/local/soft/redis-cluster/7005/bin
./redis-server redis.conf

8. Build a cluster through the tool} and install it in the master

Installation tools
        yum -y install ruby ruby-devel rubygems rpm-build
    Upload redis-3.0 0.gem  
        gem install -l redis-3.0.0.gem  

    Commands placed in the / usr / local / bin / directory can be run anywhere
    cp /usr/local/soft/redis-3.0.0/src/redis-trib.rb /usr/local/bin/redis-trib

9. Start the cluster and use it for the first time without cluster restart

#Replicas number of backup nodes per primary node
redis-trib create --replicas 1 192.168.10.12:7000 192.168.10.12:7001 192.168.10.13:7002 192.168.10.13:7003 192.168.10.14:7004 192.168.10.14:7005
10. Client access to reids cluster
#- P port number - H node IP - C auto redirect
redis-cli -p 7000 -h master -c
View cluster information
redis-cli cluster info
View node information
redis-cli cluster nodes

 

The cluster mode does not distinguish between read and write requests. If you want to query from the node, you need to execute readonly before the query

 

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