change of password

[Chen Teng-Jun]

Hi,

i have this architechure in production environment:

1 Master 2 slaves  + 3 sentinels

If we want to change the password in redis.conf(requirepass, masterauth.) , and sentinel.conf, (sentinel auth-pass <master-name> <password>)

do you have a procedure which doesn't impact the database availibility?

Thanks

[Josiah Carlson]

If your clients have already been authenticated in the past, they don't need to re-authenticate. If they haven't, you will have unavailability. See an interaction below.

 - Josiah

127.0.0.1:6379> config set requirepass ""

OK

127.0.0.1:6379> 

josiah@josiah-linux ~:$ redis-cli

127.0.0.1:6379> set foo 1

OK

127.0.0.1:6379> config set requirepass test

OK

127.0.0.1:6379> get foo

(error) NOAUTH Authentication required.

127.0.0.1:6379> auth test

OK

127.0.0.1:6379> get foo

"1"

127.0.0.1:6379> config set requirepass test2

OK

127.0.0.1:6379> get foo

"1"

127.0.0.1:6379> 

josiah@josiah-linux ~:$ redis-cli

127.0.0.1:6379> get foo

(error) NOAUTH Authentication required.

127.0.0.1:6379> auth test2

OK

127.0.0.1:6379> get foo

"1"

127.0.0.1:6379> config set requirepass ""

OK

127.0.0.1:6379> get foo

"1"

127.0.0.1:6379> 

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[Chen Teng-Jun]

Hello Josiah , thank you for your precious help

With config set requirepass, my redis.conf and sentinel.conf didn't change the password,

And I need launch "config set requirepass" on my master and all slaves?

[Josiah Carlson]

You either need to instruct sentinel/Redis to rewrite the configuration via 'CONFIG REWRITE' in Redis 2.8+, or you need to update the configuration manually.

 - Josiah

[Chen Teng-Jun]

I'm using a java client "Jedis", I have got a error : Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR invalid password, after changing the password...

[Josiah Carlson]

Your error tells you what you need to do: you need to change the password your clients use to connect to Redis.

 - Josiah