Merge pull request #24783 from thockin/kep-1659-doc-topology-labels

Better docs for standard topology labels
This commit is contained in:
Kubernetes Prow Robot
2020-11-04 07:38:04 -08:00
committed by GitHub
8 changed files with 32 additions and 49 deletions
@@ -271,7 +271,7 @@ preempted. Here's an example:
* Pod P is being considered for Node N.
* Pod Q is running on another Node in the same Zone as Node N.
* Pod P has Zone-wide anti-affinity with Pod Q (`topologyKey:
failure-domain.beta.kubernetes.io/zone`).
topology.kubernetes.io/zone`).
* There are no other cases of anti-affinity between Pod P and other Pods in
the Zone.
* In order to schedule Pod P on Node N, Pod Q can be preempted, but scheduler
@@ -200,8 +200,8 @@ The affinity on this pod defines one pod affinity rule and one pod anti-affinity
while the `podAntiAffinity` is `preferredDuringSchedulingIgnoredDuringExecution`. The
pod affinity rule says that the pod can be scheduled onto a node only if that node is in the same zone
as at least one already-running pod that has a label with key "security" and value "S1". (More precisely, the pod is eligible to run
on node N if node N has a label with key `failure-domain.beta.kubernetes.io/zone` and some value V
such that there is at least one node in the cluster with key `failure-domain.beta.kubernetes.io/zone` and
on node N if node N has a label with key `topology.kubernetes.io/zone` and some value V
such that there is at least one node in the cluster with key `topology.kubernetes.io/zone` and
value V that is running a pod that has a label with key "security" and value "S1".) The pod anti-affinity
rule says that the pod cannot be scheduled onto a node if that node is in the same zone as a pod with
label having key "security" and value "S2". See the
@@ -209,7 +209,7 @@ parameters:
volumeBindingMode: WaitForFirstConsumer
allowedTopologies:
- matchLabelExpressions:
- key: failure-domain.beta.kubernetes.io/zone
- key: topology.kubernetes.io/zone
values:
- us-central1-a
- us-central1-b
+1 -1
View File
@@ -449,7 +449,7 @@ spec:
required:
nodeSelectorTerms:
- matchExpressions:
- key: failure-domain.beta.kubernetes.io/zone
- key: topology.kubernetes.io/zone
operator: In
values:
- us-central1-a