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Added more explanation for nodeAffinity.

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Explain more for how multiple nodeSelectorTerms and multiple
matchExpressions works.

Fixed #3345
This commit is contained in:
Guangya Liu
2017-04-27 00:02:18 +08:00
committed by Andrew Chen
parent 1ed1472057
commit 7f52b9eb09
1 changed files with 4 additions and 0 deletions
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docs/concepts/configuration/assign-pod-node.md
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@@ -138,6 +138,10 @@ There is no explicit "node anti-affinity" concept, but `NotIn` and `DoesNotExist
If you specify both `nodeSelector` and `nodeAffinity`, *both* must be satisfied for the pod If you specify both `nodeSelector` and `nodeAffinity`, *both* must be satisfied for the pod
to be scheduled onto a candidate node. to be scheduled onto a candidate node.
If you specify multiple `nodeSelectorTerms` associated with `nodeAffinity` types, then the pod can be scheduled onto a node **if one of** the `nodeSelectorTerms` is satisfied.
If you specify multiple `matchExpressions` associated with `nodeSelectorTerms`, then the pod can be scheduled onto a node **only if all** `matchExpressions` can be satisfied.
For more information on node affinity, see the design doc For more information on node affinity, see the design doc
[here](https://github.com/kubernetes/kubernetes/blob/{{page.githubbranch}}/docs/design/nodeaffinity.md). [here](https://github.com/kubernetes/kubernetes/blob/{{page.githubbranch}}/docs/design/nodeaffinity.md).