kubernetes
/
website
mirror of https://github.com/kubernetes/website.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Updates on the PV zone affinity documentation 

Updates docs around the PV distribution process per the linked issues
pull/2337/head
Justin Nauman 2016-12-28 14:54:52 -06:00 committed by Andrew Chen
parent b1dfb93e1b
commit 5e77cd1825
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
docs/admin/multiple-zones.md
View File

@ -51,7 +51,7 @@ admission controller automatically adds zone labels to them. The scheduler (via
`VolumeZonePredicate` predicate) will then ensure that pods that claim a
given volume are only placed into the same zone as that volume, as volumes
cannot be attached across zones.
## Limitations
There are some important limitations of the multizone support:
@ -158,8 +158,7 @@ kubernetes-minion-wf8i Ready 2m beta.kubernetes.io
### Volume affinity
Create a volume (only PersistentVolumes are supported for zone
affinity), using the new dynamic volume creation:
Create a volume using the dynamic volume creation (only PersistentVolumes are supported for zone affinity):
```json
kubectl create -f - <<EOF
@ -186,10 +185,14 @@ kubectl create -f - <<EOF
EOF
```
The PV is also labeled with the zone & region it was created in. For
version 1.2, dynamic persistent volumes are always created in the zone
of the cluster master (here us-central1-a / us-west-2a); this will
be improved in a future version (issue [#23330](https://github.com/kubernetes/kubernetes/issues/23330).)
**NOTE:** For version 1.3+ Kubernetes will distribute dynamic PV claims across
the configured zones. For version 1.2, dynamic persistent volumes were
always created in the zone of the cluster master
(here us-central1-a / us-west-2a); that issue
([#23330](https://github.com/kubernetes/kubernetes/issues/23330))
was addressed in 1.3+.
Now lets validate that Kubernetes automatically labeled the zone & region the PV was created in.
```shell
> kubectl get pv --show-labels