openstack-helm-infra/helm-toolkit/templates/snippets/_kubernetes_pod_anti_affinity.tpl
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Change-Id: I1882738cf9757c5350a8533876fd37b5920b5235
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{{/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}
{{/*
abstract: |
Renders kubernetes anti affinity rules, this function supports both hard
'requiredDuringSchedulingIgnoredDuringExecution' and soft
'preferredDuringSchedulingIgnoredDuringExecution' types.
values: |
pod:
affinity:
anti:
topologyKey:
default: kubernetes.io/hostname
type:
default: requiredDuringSchedulingIgnoredDuringExecution
weight:
default: 10
usage: |
{{ tuple . "appliction_x" "component_y" | include "helm-toolkit.snippets.kubernetes_pod_anti_affinity" }}
return: |
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: release_group
operator: In
values:
- RELEASE-NAME
- key: application
operator: In
values:
- appliction_x
- key: component
operator: In
values:
- component_y
topologyKey: kubernetes.io/hostname
*/}}
{{- define "helm-toolkit.snippets.kubernetes_pod_anti_affinity._match_expressions" -}}
{{- $envAll := index . "envAll" -}}
{{- $application := index . "application" -}}
{{- $component := index . "component" -}}
{{- $expressionRelease := dict "key" "release_group" "operator" "In" "values" ( list ( $envAll.Values.release_group | default $envAll.Release.Name ) ) -}}
{{- $expressionApplication := dict "key" "application" "operator" "In" "values" ( list $application ) -}}
{{- $expressionComponent := dict "key" "component" "operator" "In" "values" ( list $component ) -}}
{{- list $expressionRelease $expressionApplication $expressionComponent | toYaml }}
{{- end -}}
{{- define "helm-toolkit.snippets.kubernetes_pod_anti_affinity" -}}
{{- $envAll := index . 0 -}}
{{- $application := index . 1 -}}
{{- $component := index . 2 -}}
{{- $antiAffinityType := index $envAll.Values.pod.affinity.anti.type $component | default $envAll.Values.pod.affinity.anti.type.default }}
{{- $antiAffinityKey := index $envAll.Values.pod.affinity.anti.topologyKey $component | default $envAll.Values.pod.affinity.anti.topologyKey.default }}
podAntiAffinity:
{{- $matchExpressions := include "helm-toolkit.snippets.kubernetes_pod_anti_affinity._match_expressions" ( dict "envAll" $envAll "application" $application "component" $component ) -}}
{{- if eq $antiAffinityType "preferredDuringSchedulingIgnoredDuringExecution" }}
{{ $antiAffinityType }}:
- podAffinityTerm:
labelSelector:
matchExpressions:
{{ $matchExpressions | indent 10 }}
topologyKey: {{ $antiAffinityKey }}
{{- if $envAll.Values.pod.affinity.anti.weight }}
weight: {{ index $envAll.Values.pod.affinity.anti.weight $component | default $envAll.Values.pod.affinity.anti.weight.default }}
{{- else }}
weight: 10
{{- end -}}
{{- else if eq $antiAffinityType "requiredDuringSchedulingIgnoredDuringExecution" }}
{{ $antiAffinityType }}:
- labelSelector:
matchExpressions:
{{ $matchExpressions | indent 8 }}
topologyKey: {{ $antiAffinityKey }}
{{- end -}}
{{- end -}}