Alex,
So I have taken a stab and getting erasure coding configured.
I was following along with the info in this link:
Doing the following commands with in the ceph-mon/0* container.
Create erasure code profile
ceph osd erasure-code-profile set ec-51-profile k=5 m=1 plugin=jerasure technique=reed_sol_van crush-failure-domain=host
Create erasure coded pool
ceph osd pool create ec51 64 erasure ec-51-profile
Enable overwrites
ceph osd pool set ec51 allow_ec_overwrites true
Tag EC pool as RBD pool
ceph osd pool application enable ec51 rbd
However, when I got to the section on “Using EC pools with RBD”, I realized that there were no RBD pools in the default install so I could not continue. I only see RGW pools.
root@juju-a1eb13-1:~# ceph osd lspools
1 default.rgw.buckets
2 default.rgw
3 default.rgw.root
4 default.rgw.control
5 default.rgw.gc
6 default.rgw.buckets.index
7 default.rgw.buckets.extra
8 default.log
9 default.intent-log
10 default.usage
11 default.users
12 default.users.email
13 default.users.swift
14 default.users.uid
15 .rgw.root
16 gnocchi
17 glance
18 default.rgw.meta
19 default.rgw.log
20 cinder-ceph
21 ec51
So I Googled some more and found this link:
It seems straight forward but I do have questions.
First, am I correct that I should be using RGW pools rather than RBD pools,
Second, it appears in the article that it is a “create, copy, rename” process rather than converting. Although I have no images or instances in my environment as yet. For recovery purposes, I will probably take that approach.
Third, what about the glance, gnocchi, and cinder-ceph default pools. Do I need to convert those to EC pools as well? I would think that I would as I “assume” that they are using replication.
Fourth, once I have converted the RGW pools to use EC. Do I need to change anything in the other service containers as I am eventually renaming the EC pools back to the default name at install?
Lastly, I am doing this all from inside the ceph-mon/0* container, is the a workable approach? I looked at the JUJU actions for the Ceph_Mon charm and was not sure how to accomplish all the necessary steps correctly.
I appreciate any guidance.
Greg