Redis Administration
Here are some common administration tasks for Redis. Check FAQ: Redis for more details.
Init Redis
Init Cluster/Node/Instance
# init all redis instances on group <cluster>
./redis.yml -l <cluster> # init redis cluster
# init redis node
./redis.yml -l 10.10.10.10 # init redis node
# init one specific redis instance 10.10.10.11:6379
./redis.yml -l 10.10.10.11 -e redis_port=6379 -t redis
You can also use wrapper script:
bin/redis-add redis-ms # create redis cluster 'redis-ms'
bin/redis-add 10.10.10.10 # create redis node '10.10.10.10'
bin/redis-add 10.10.10.10 6379 # create redis instance '10.10.10.10:6379'
Remove Redis
Remove Cluster/Node/Instance
# Remove cluster `redis-test`
redis-rm.yml -l redis-test
# Remove cluster `redis-test`, and uninstall packages
redis-rm.yml -l redis-test -e redis_uninstall=true
# Remove all instance on redis node 10.10.10.13
redis-rm.yml -l 10.10.10.13
# Remove one specific instance 10.10.10.13:6379
redis-rm.yml -l 10.10.10.13 -e redis_port=6379
You can also use wrapper script:
bin/redis-rm redis-ms # remove redis cluster 'redis-ms'
bin/redis-rm 10.10.10.10 # remove redis node '10.10.10.10'
bin/redis-rm 10.10.10.10 6379 # remove redis instance '10.10.10.10:6379'
Reconfigure Redis
You can partially run redis.yml tasks to re-configure redis.
./redis.yml -l <cluster> -t redis_config,redis_launch
Beware that redis can not be reload online, you have to restart redis to make config effective.
Use Redis Client Tools
Access redis instance with redis-cli:
$ redis-cli -h 10.10.10.10 -p 6379 # <--- connect with host and port
10.10.10.10:6379> auth redis.ms # <--- auth with password
OK
10.10.10.10:6379> set a 10 # <--- set a key
OK
10.10.10.10:6379> get a # <--- get a key back
"10"
Redis also has a redis-benchmark which can be used for benchmark and generate load on redis server:
redis-benchmark -h 10.10.10.13 -p 6379
Configure Redis Replica
https://redis.io/commands/replicaof/
# promote a redis instance to primary
> REPLICAOF NO ONE
"OK"
# make a redis instance replica of another instance
> REPLICAOF 127.0.0.1 6799
"OK"
Configure HA with Sentinel
You have to enable HA for redis standalone m-s cluster manually with your redis sentinel.
Take the 4-node sandbox as an example, a redis sentinel cluster redis-meta is used manage the redis-ms standalone cluster.
# for each sentinel, add redis master to the sentinel with:
$ redis-cli -h 10.10.10.11 -p 26379 -a redis.meta
10.10.10.11:26379> SENTINEL MONITOR redis-ms 10.10.10.10 6379 1
10.10.10.11:26379> SENTINEL SET redis-ms auth-pass redis.ms # if auth enabled, password has to be configured
If you wish to remove a redis master from sentinel, use SENTINEL REMOVE <name>.
You can configure multiple redis master on sentinel cluster with redis_sentinel_monitor.
redis_sentinel_monitor: # primary list for redis sentinel, use cls as name, primary ip:port
- { name: redis-src, host: 10.10.10.45, port: 6379 ,password: redis.src, quorum: 1 }
- { name: redis-dst, host: 10.10.10.48, port: 6379 ,password: redis.dst, quorum: 1 }
And refresh master list on sentinel cluster with:
./redis.yml -l redis-meta -t redis-ha # replace redis-meta if your sentinel cluster has different name
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