How to Deploy Xenon: A Raft‑Based MySQL HA Solution with Semi‑Sync and Parallel Replication
This guide walks through deploying Xenon, an open‑source Raft‑based MySQL high‑availability solution, covering environment setup, installation of Go and Percona XtraBackup, configuring Xenon’s JSON, starting the cluster, monitoring status, and troubleshooting backup failures caused by misconfigured host settings.
In the era of MySQL 5.5 traditional replication, MHA was mature, but it did not evolve for MySQL 5.6 GTID; the last release was 2018. RadonDB created a new open‑source MySQL HA tool called Xenon, which uses the Raft consensus algorithm for leader election, semi‑sync replication for strong consistency, and leverages MySQL 5.7+ parallel binlog replay to reduce replica lag.
Source code: https://github.com/radondb/xenon
Experimental Environment
master db01 192.168.3.112
slave db02 192.168.3.113
salve db03 192.168.3.114
Steps:
Configure enhanced semi‑sync master‑slave replication (see “MySQL‑Master‑Slave Replication”).
Install Percona XtraBackup on all three hosts.
Set up password‑less SSH between the hosts.
Install Go environment (download from https://golang.google.cn/dl/).
Install Xenon.
Configure Xenon on each host.
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