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Imgcity📦 DatabaseRedis

Redis ​

REmote DIctionary Server

Cluster ​

Troubleshooting: Stuck on Creating Cluster ​

Sometimes stuck on here:

bash
redis-cli --cluster create ... --cluster-replicas 1 --cluster-yes

Should check

  • Docker's network: Redis server should broadcast ip with docker's ip or use host mode
  • Nodes' name maybe duplicate: Check the data in /var/lib/redis/nodes.conf

Ref: https://linux.m2osw.com/redis-infamous-waiting-cluster-join-message

Server Version ​

$ redis-cli
> INFO SERVER

Nodes ​

$ redis-cli -c # -c to use cluster mode
127.0.0.1:6379> CLUSTER NODES

Redis Cluster: (error) MOVED ​

Should connect cluster node with -c option

$ redis-cli -c

Alert/Monitor ​

Ref: https://blog.yowko.com/redis-monitoring/

Why ​

  1. To located problem point.
  2. Greater performance and effect.

List ​

  • Memory usage: Since Redis is an memory-based key-value DB, it's crucial to monitor memory usage.
  • CPU Usage
  • connected_clients: Should not smaller than smallest app (user) number.

Changelog

Just observe 👀