CODEWITHSUNDEEP
redishigh-availabilityredis-sentinel
Jbezos
Jbezos

Reputation: 141

Redis sentinel failover, choose specific master

I have 3 replicated Redis instances running on 3 different machines: A, B and C. I initially choose A as my master. I also have 3 sentinels (1 on each machine) monitoring A.

In case A goes down, I want sentinels to choose a specific master to failover to (say B). Is there a way to choose a specific master instead of leaving it to the election mechanism of the sentinels?

Since I couldn't find this question anywhere, I reckon it's not standard procedure so I'll explain the reason behind it: My application is running on A, B and C behind a load balancer. The master uses its local Redis db which is replicated to the other two slaves.

When A fails, the load balancer could choose B as master while Redis sentinels could elect C as Redis master. As I just said, I need the instance to be local, so that's why I need to specify B as the Redis master.

Upvotes: 1

Views: 1311

Answers (1)

davissp14
davissp14

Reputation: 765

There's a Redis configuration setting called 'slave-priority' that may help you out.

Reference: http://download.redis.io/redis-stable/redis.conf

Upvotes: 1

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