Redis::ReconnectWithReadonly
Reconnect your redis connection if Redis::CommandError READONLY You can't write against a read only slave. occurs because of failover.
When redis cluster failovers, the redis master is depromoted to slave and will be READONLY. Such case we have to reconnect redis connection so that new connection goes to new master which is writable.
Installation
Add this line to your application's Gemfile:
gem 'redis-reconnect_with_readonly'
And then execute:
$ bundle
Or install it yourself as:
$ gem install redis-reconnect_with_readonly
Usage
require 'redis/reconnect_with_readonly'
Configuration
This gem tries to reconnect reconnect_attempts times.
It will wait initial_retry_wait * number of retries seconds on each retry.
The waiting interval can be suppressed up to max_retry_wait seconds.
Redis::ReconnectWithReadonly.reconnect_attempts = 10 # default: 3 (times)
Redis::ReconnectWithReadonly.initial_retry_wait = 1.0 # default: 0.5 (sec)
Redis::ReconnectWithReadonly.max_retry_wait = 5.0 # default: nil which means no max (sec)
Redis::ReconnectWithReadonly.logger = Logger.new(STDOUT) # default: nil
Implementation
This gem monkey patches Redis::Client.
Development
$ redis-server --port 6379
$ redis-server --port 6380
$ redis-cli -h localhost -p 6380
localhost:6380> slaveof localhost 6379
$ bin/console
> redis = Redis.new(:host => "localhost", :port => 6380)
> redis.set('key', 'val')
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/sonots/redis-reconnect_with_readonly. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
License
The gem is available as open source under the terms of the MIT License.