Re: Manual deployment, documentation error?

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> Cons of using cephadm (and thus docker):
> - You need to learn the basics of docker

If you learn only the basics, you will probably fuck up when you have some sort of real issue with ceph. I would not recommend sticking to basics of anything with this install, it is not like if something goes wrong you restore a vm from a snapshot or so. 

> Pros:
> + cephadm works very easy. The time you spend on learing docker will be
> easely compensated by the small time you need to learn cephadm

Incorrect, you need to learn ceph as much as in any install. If you proceed to use ceph in a manner where you do not know what you are doing, you ‘risk’ losing your clients data.

> + Upgrading a manual installation is very tricky! Cephadm manages
> upgrades of ceph automatically. You only need to give the command (done
> it already two times).

Why is this tricky? Just read the guidelines and understand them. I would even argue that you need to know how to update ceph manually. So you are better prepared for what happens at stages of the update.

> + If you need to upgrade your OS, will the manual installation still
> function? With cephadm the ceph processes inside the docker containers
> experience minimal impact with the upgrade of the os (dind't do an OS
> upgrade yet, but had this issue with other applications).
> 

If you need to use cephadm because you can't work with ceph manually, just forget about using ceph.
(and forget about this docker, do this podman if you have to)


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