Thank you, severalnines, for the brilliant guide to deploy a Nextcloud ("NC") cluster (something I have been wanting to do for a while)! Without the guide, and also without Clustercontrol, I wouldn't have been able to achieve this so quickly.
Now my cluster is actually up and running (only in test environment because there is so much to learn about clusters in general and NC and mysql clusters in particular).
The last step in the guide mentions using redis, how to install and to integrate into NC config. When it comes to providing the host address, it only gives the IP of the first NC host and not of the others. I imagine this can work. But I am wondering what will happen, if that one host is down. Will the other two hosts then be rendered inoperational? Would it make sense to install redis on all NC hosts and reference the IP in the NC config file as "localhost"? Or is this not needed, as NC is recommended to run in a single-writer setup only. But then, I wonder, irrespective of using redis or not, whether this setup will work when the writer host is down?
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