I'm deploying rook-ceph into a minikube cluster. Everything seems to be working. I added 3 unformatted disk to the vm and its connected. The problem that im having is when I run ceph status, I get a health warm message that tells me "1 pg undersized". How exactly do I fix this?
The documentation(https://docs.ceph.com/docs/mimic/rados/troubleshooting/troubleshooting-pg/) stated "If you are trying to create a cluster on a single node, you must change the default of the osd crush chooseleaf type setting from 1 (meaning host or node) to 0 (meaning osd) in your Ceph configuration file before you create your monitors and OSDs." I don't know where to make this configuration but if there's any other way to fix this that I should know of, please let me know. Thanks!
As you mentioned in your question you should change your crush failure-domain-type to OSD that it means it will replicate your data between OSDs not hosts. By default it is host and when you have only one host it doesn't have any other hosts to replicate your data and so your pg will always be undersized.
You should set osd crush chooseleaf type = 0 in your ceph.conf before you create your monitors and OSDs.
This will replicate your data between OSDs rather that hosts.