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Update upgrade doc for node hang issue

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This PR updates the upgrade doc to handle the
node drain issue what we have seen in
https://github.com/ceph/ceph-csi/issues/756

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2020-03-18 12:41:10 +05:30 committed by mergify[bot]
parent 179084a60a
commit 7f8c535c42
1 changed files with 15 additions and 2 deletions
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docs/ceph-csi-upgrade.md
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@ -19,6 +19,7 @@
- [4.1 Update the RBD Nodeplugin RBAC](#41-update-the-rbd-nodeplugin-rbac)
- [4.2 Update the RBD Nodeplugin daemonset](#42-update-the-rbd-nodeplugin-daemonset)
- [4.3 Manual deletion of RBD Nodeplugin daemonset pods](#43-manual-deletion-of-rbd-nodeplugin-daemonset-pods)
- [Handling node reboot hangs due to existing network mounts](#handling-node-reboot-hangs-due-to-existing-network-mounts)
## Pre-upgrade considerations
@ -185,7 +186,7 @@ For each node:
- The pod deletion causes the pods to be restarted and updated automatically
on the node.
we have successfully upgrade cephfs csi from v1.2.2 to v2.0.0
we have successfully upgraded cephfs csi from v1.2.2 to v2.0.0
### Upgrading RBD
@ -303,4 +304,16 @@ For each node:
- The pod deletion causes the pods to be restarted and updated automatically
on the node.
we have successfully upgrade RBD csi from v1.2.2 to v2.0.0
we have successfully upgraded RBD csi from v1.2.2 to v2.0.0
### Handling node reboot hangs due to existing network mounts
With prior versions of ceph-csi a node reboot may hang the reboot process. This
is due to existing cephfs or rbd network mounts not carrying the `_netdev`
mount option. The missing mount option is fixed, and future mounts using
ceph-csi would automatically carry the required flags needed for a clean
reboot.
It is suggested to upgrade to the latest ceph-csi release and drain application
pods on all the nodes so that new mount option `_netdev` can be added to all
the mountpoints.