Ceph Jewel to Luminous
Introduction
This HOWTO explains the upgrade from Ceph Jewel to Luminous (12.2.0 or higher) on Proxmox VE 4.x in preparation for upgrading to PVE 5.x.
The latest Ceph version supported in pveceph in PVE 4.x is Ceph Jewel (10.2.x). An upgrade to Ceph Luminous (12.2.x) is only possible temporarily as first step of upgrading to PVE 5.x.
More information see Release Notes
Assumption
In this HOWTO we assume that all nodes are on the very latest Proxmox VE 4.4 version and Ceph is on Version Jewel (10.2.9 or higher).
The Cluster must be healthy and working.
Cluster Preparation
On a cluster member you have to set sortbitwise. This is very important, if this flag is not set you can lose all your data.
ceph osd set sortbitwise
To avoid re-balance during the upgrade process set noout.
ceph osd set noout
Since Luminous you have to allow explicit to delete a pool. Edit /etc/pve/ceph.conf with your preferred editor and add this line in section [global]
mon allow pool delete = true
Preparation on each ceph cluster node
Change the current Ceph repositories from Jewel to Luminous.
sed -i 's/jewel/luminous/' /etc/apt/sources.list.d/ceph.list
More information see Ceph Packages
Note: The ceph luminous version to install should be lower then the released version on the ceph repository from Proxmox.
In some cases the released packages on the ceph upstream repository are newer then on the ceph repository from Proxmox. This will prevent the use of the ceph repository from Proxmox on upgrading to PVE 5.x. A downgrade of the packages or waiting till the versions match would be necessary.
You can find the ceph luminous packages from Proxmox here: http://download.proxmox.com/debian/ceph-luminous/dists/stretch/main/binary-amd64/
(upstream) download.ceph.com -> 12.2.7 (Proxmox) download.proxmox.com -> 12.2.5
In this example the upstream version is newer then the version from Proxmox. So the lower version (eg. 12.2.5) needs to be installed explicitly.
apt install ceph=12.2.5
To install a version with apt explicitly you specify the version directly with the package.
Upgrade on each ceph cluster node
Upgrade all your nodes with the following commands.
apt-get update && apt-get dist-upgrade
It will upgrade Ceph on your node to Luminous. After the update all services are still running using the old jewel binaries.
Restart the Monitor daemons
After all cluster nodes are upgraded you have to restart the monitor on each node were a monitor is configured.
systemctl restart ceph-mon@<MON-ID>.service
Verify Monitor instance versions
Print the binary versions of all currently running Monitor instances in your cluster. Verify that all monitors are running the same Ceph version, and that the version number starts with 12 (X, Y, and AAA are placeholders):
ceph mon versions
{
"ceph version 12.X.Y (AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA) luminous (rc)": 3
}
The last number shows the number of monitor instances.
Create Manager instances
Create a manager instance on each node where a monitor is configured:
pveceph createmgr
Restart the OSD daemon on all nodes
Then restart all OSD instances on all node
systemctl restart ceph-osd.target
Check the currently running binary version of all running OSD instances in your cluster:
ceph osd versions
After restarting all OSD instances on all nodes, this should output one line with a Ceph Luminous version string followed by the total number of OSDs in your cluster.
Check cluster status and adjust settings
After your node has successful restarts the daemons, unset the 'noout' flag. On the GUI or by this command.
ceph osd unset noout
Now check if you Ceph cluster is healthy.
ceph -s
You will get a warning like this "require_osd_release < luminous" you can fix it with the following command.
ceph osd require-osd-release luminous
Also it is recommended to set the tunable to optimal, but this will produce a massive rebalance.
ceph osd set-require-min-compat-client jewel
ceph osd crush tunables optimal
After you set all tunables, you might see the following message: "application not enabled on 2 pool(s)". Starting with Ceph luminous a pool needs to be associated with an application.
ceph osd pool application enable rbd rbd