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Install Redis Cluster

download installation package

cd /opt/

wget https://rmc.webex.com/qa/systuning/centos7_64/WBXredis-6.2.4-1.el7.x86_64.rpm

wget https://rmc.webex.com/qa/systuning_src/centos7_64/rubygem-redis-3.3.3-1.src.rpm

installation commad

rpm -ivh rubygem-redis-3.3.3-1.src.rpm --nodeps --force

rpm -ivh WBXredis-6.2.4-1.el7.x86_64.rpm --nodeps --force

configure redis cluster

  • configuration information 
    mkdir -p /opt/redis/conf

cd /opt/redis/conf

mkdir 6379 6380
  • add redis-6379.conf and redis-6380.conf in 6379 and 6380 folders respectively
    • vi 6379/redis.conf 
      port 6379
daemonize yes
protected-mode no
dir /var/log/redis/

maxmemory 5gb
maxmemory-policy volatile-lfu

dbfilename  redis-6379.rdb
rdbcompression yes

appendonly no

slowlog-max-len 1000
slowlog-log-slower-than 1000

cluster-enabled yes
cluster-config-file nodes-6379.conf
cluster-require-full-coverage no
requirepass Ch4ll3ng3M3!
loglevel notice
logfile /var/log/redis/6379.log
cluster-node-timeout 3000


masterauth Ch4ll3ng3M3!
    • vi 6380/redis.conf 
      port 6380
daemonize yes
protected-mode no
dir /var/log/redis/

maxmemory 5gb
maxmemory-policy volatile-lfu

dbfilename  redis-6380.rdb
rdbcompression yes

appendonly yes
appendfsync no
auto-aof-rewrite-min-size  100mb
no-appendfsync-on-rewrite yes
appendfilename redis-6380.aof

slowlog-max-len 1000
slowlog-log-slower-than 1000

cluster-enabled yes
cluster-config-file nodes-6380.conf
cluster-require-full-coverage no

requirepass Ch4ll3ng3M3!
loglevel notice
logfile /var/log/redis/6380.log
cluster-node-timeout 3000

masterauth Ch4ll3ng3M3!
  • Create the corresponding folder according to the configuration information 
    mkdir -p /var/log/redis

Start redis

/opt/redis/bin/redis-server /opt/redis/conf/6379/redis.conf

/opt/redis/bin/redis-server /opt/redis/conf/6380/redis.conf

Problems that may encounter:

- Q:error while loading shared libraries: libssl.so.10: cannot open shared object file: No such file or directory

- A:Update the yum source. And then starting redis again.If update failed, you need to manually install "compat-openssl10-1.0.2o-3.el8.x86_64.rpm" package.

Start-up redis cluster

  • All servers must start Redis according to above steps 
    /opt/redis/bin/redis-cli --cluster create 10.225.28.13:6379 10.225.28.156:6379 10.225.28.198:6379 10.225.28.13:6380 10.225.28.156:6380 10.225.28.198:6380  --cluster-replicas 1 -a Ch4ll3ng3M3!
  • the following method is used to set the specified master-slave 
    # Please remember the ID of each redis master
/opt/redis/bin/redis-cli --cluster create 10.225.28.13:6379 10.225.28.156:6379 10.225.28.198:6379 --cluster-replicas 0  -a Ch4ll3ng3M3!
  • Specify the slave library for each redis mater 
    /opt/redis/bin/redis-cli --cluster add-node --cluster-slave --cluster-master-id 59c509259473f73f88fb000b2e9e4b3dd92d3088 10.225.28.13:6380 10.225.28.198:6379 -a Ch4ll3ng3M3!