Galera 3 node cluster + web servers ¿load balancer best route?

October 9, 2019 195 views
Load Balancing MariaDB
raenk
By:
raenk

Hi,

I’m trying to get a redundant setup with MariaDB Galera (3 nodes cluster).

I have 4 web servers that needs to read/write (not too heavy currently) to the cluster. However, the only piece missing is the “bridge” between web servers and the DB cluster.

What would be the best option?
A load balancer? How much of a single point of failure the load balancer would be?

I don’t want to over complicate things either. Any idea is welcomed.

Thanks!

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1 Answer
alexdo MOD October 9, 2019

Hello, @raenk

I believe you should be fine with e Load Balancer setup. The load balancer can be a small node which will only redirect the requests. You can use Galera Load Balancer (glb) for this. it should work perfectly.

If you’re afraid that with load balancer in place there is a single point of failure you can grand more resources to the load balancer or simply setup a small test environment to see if this setup will be suitable with your needs.

Let me know if you have any questions.

  • raenk October 9, 2019

    Hi,

    Thanks for your response. I was thinking about a DO load balancer. For GLB, it would have to be a droplet manually setup as GLB, correct?

    Or there’s a way to fire up a DO GLB? If not, would you rather recommend GLB over DO’s?

    Thanks again!

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