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I’ve been trying to convince a VPS to run two instances of mariadb - one for local databases, one to replicate the homelab. Got mariadb@server and mariadb@replica sorted out through systemd, but now stuck on replication from mysql to mariadb. Looks like I’ll be ripping out mariadb and putting everything on mysql.

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tofu@lemmy.nocturnal.garden ⁨5⁩ ⁨months⁩ ago
Interesting using systemd for that, I’d probably have chosen containers for that.

What’s the reason for replication vs. dumps? Does the client failover to the replica?

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- tburkhol@lemmy.world ⁨5⁩ ⁨months⁩ ago
  I’m not a systemd guru, but it turned out pretty easy. dev.mysql.com/doc/refman/…/using-systemd.html#sys… Basically just make [mysqld@copy] sections in my.cnf then systemd start mysqld@copy and systemd is smart enough to pass copy into mysql.
  
  I did it slightly different, using systemctl edit mysql@.service to define different default files for each instance, then [mysqld@copy] sections in each of those files. Seems like the port option for each has to go in a [mysqld] section, but otherwise ok.
  
  Replication because I want to put some live data, read-only, on the VPS, exposed to the world while the ‘real’ database stays safely hidden in my intranet. SSH tunnel so the replica can talk to the real database.
  
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RheumatoidArthritis@mander.xyz ⁨5⁩ ⁨months⁩ ago
Have you checked if statement-based replication works from mysql to mariadb?

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- tburkhol@lemmy.world ⁨5⁩ ⁨months⁩ ago
  I’m hung up on unrecognized charset #255. Tried rolling everything back to utfmb3; suppose I could go all the way to Latin1. I imagine there’s a lot of depth I could learn, but dropping mariadb for mysql seems like the path of least resistance right now.
  
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  - RheumatoidArthritis@mander.xyz ⁨5⁩ ⁨months⁩ ago
    So it works now! Good job
    
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