Docker Compose for MySQL High Availablity

Another utility project: https://github.com/gonwan/docker-library/tree/main/mysql-master-slave. Just paste readme.md here:

Introduction

One-command docker compose configuration to set up a MySQL master-slave replication with HA/Failover support.
It’s a simplified version inspired by Github: https://github.blog/2018-06-20-mysql-high-availability-at-github/.

Putting the flow together:
– The orchestrator nodes detect failures.
– The orchestrator/raft leader kicks off a recovery. A new primary gets promoted.
– orchestrator/raft advertises the primary change to all raft cluster nodes.
– Each orchestrator/raft member receives a leader change notification. They each update the local Consul’s KV store with the identity of the new primary.
– Each GLB/HAProxy has consul-template running, which observes the change in Consul’s KV store, and reconfigures and reloads HAProxy.
– Client traffic gets redirected to the new primary.

More info: https://www.percona.com/live/18/sessions/orchestrator-high-availability-tutorial.

Components

  • MySQL 8.0
  • Orchestrator 3.1.4
  • Consul 1.8
  • Consul Template 0.25.1
  • HAProxy 2.0

Run

Component Address External Address
MySQL 172.16.111.10:3306 localhost:13306
172.16.111.11:3306 localhost:13307
172.16.111.12:3306 localhost:13308
Orchestrator 172.16.111.100:3000 localhost:14000
Consul 172.16.111.110:8500 localhost:14001
Consul Template N/A N/A
HAProxy 172.16.111.120:3306 localhost:3306
172.16.111.120:8000 localhost:8000

Open http://localhost:14000 to visit Orchestrator.

Connect to MySQL via HAProxy:

Verify cluster failover with:

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