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Update label selectors caution about OR operator (#17477)

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2019-11-11 21:24:06 -05:00
committed by Kubernetes Prow Robot
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content/en/docs/concepts/overview/working-with-objects/labels.md
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@@ -92,6 +92,10 @@ them.
For some API types, such as ReplicaSets, the label selectors of two instances must not overlap within a namespace, or the controller can see that as conflicting instructions and fail to determine how many replicas should be present.
{{< /note >}}
{{< caution >}}
For both equality-based and set-based conditions there is no logical _OR_ (`||`) operator. Ensure your filter statements are structured accordingly.
{{< /caution >}}
### _Equality-based_ requirement
_Equality-_ or _inequality-based_ requirements allow filtering by label keys and values. Matching objects must satisfy all of the specified label constraints, though they may have additional labels as well.