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helm: add pod anti-affinity for provisioner deployments

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When replication count is >1 of the provisioner, the added anti-affinity rules
will prevent provisioner operators from scheduling on the same nodes. The
kubernetes scheduler will spread the pods across nodes to improve availability
during node failures.

Signed-off-by: Nico Berlee <nico.berlee@on2it.net>
This commit is contained in:
Nico Berlee 2020-09-20 03:00:51 +02:00 committed by mergify[bot]
parent 6a5f1380b0
commit 7b940df568
3 changed files with 34 additions and 2 deletions
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16
charts/ceph-csi-cephfs/templates/provisioner-deployment.yaml
View File

@ -25,6 +25,22 @@ spec:
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
spec:
{{- if gt (int .Values.provisioner.replicaCount) 1 }}
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- {{ include "ceph-csi-cephfs.name" . }}
- key: component
operator: In
values:
- {{ .Values.provisioner.name }}
topologyKey: "kubernetes.io/hostname"
{{- end }}
serviceAccountName: {{ include "ceph-csi-cephfs.serviceAccountName.provisioner" . }}
containers:
- name: csi-provisioner

16
charts/ceph-csi-rbd/templates/provisioner-deployment.yaml
View File

@ -25,6 +25,22 @@ spec:
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
spec:
{{- if gt (int .Values.provisioner.replicaCount) 1 }}
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- {{ include "ceph-csi-rbd.name" . }}
- key: component
operator: In
values:
- {{ .Values.provisioner.name }}
topologyKey: "kubernetes.io/hostname"
{{- end }}
serviceAccountName: {{ include "ceph-csi-rbd.serviceAccountName.provisioner" . }}
containers:
- name: csi-provisioner

4
scripts/install-helm.sh
View File

@ -117,7 +117,7 @@ install_cephcsi_helm_charts() {
done
# install ceph-csi-cephfs and ceph-csi-rbd charts
"${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-cephfsplugin-provisioner --set nodeplugin.fullnameOverride=csi-cephfsplugin --set configMapName=ceph-csi-config --set provisioner.podSecurityPolicy.enabled=true --set nodeplugin.podSecurityPolicy.enabled=true ${CEPHFS_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-cephfs
"${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-cephfsplugin-provisioner --set nodeplugin.fullnameOverride=csi-cephfsplugin --set configMapName=ceph-csi-config --set provisioner.podSecurityPolicy.enabled=true --set nodeplugin.podSecurityPolicy.enabled=true --set provisioner.replicaCount=1 ${CEPHFS_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-cephfs
check_deployment_status app=ceph-csi-cephfs ${NAMESPACE}
check_daemonset_status app=ceph-csi-cephfs ${NAMESPACE}
@ -125,7 +125,7 @@ install_cephcsi_helm_charts() {
# deleting configmap as a workaround to avoid configmap already present
# issue when installing ceph-csi-rbd
kubectl delete cm ceph-csi-config --namespace ${NAMESPACE}
"${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-rbdplugin-provisioner --set nodeplugin.fullnameOverride=csi-rbdplugin --set configMapName=ceph-csi-config --set provisioner.podSecurityPolicy.enabled=true --set nodeplugin.podSecurityPolicy.enabled=true ${RBD_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-rbd --set topology.enabled=true --set topology.domainLabels="{${NODE_LABEL_REGION},${NODE_LABEL_ZONE}}" --set provisioner.maxSnapshotsOnImage=3
"${HELM}" install --namespace ${NAMESPACE} --set provisioner.fullnameOverride=csi-rbdplugin-provisioner --set nodeplugin.fullnameOverride=csi-rbdplugin --set configMapName=ceph-csi-config --set provisioner.podSecurityPolicy.enabled=true --set nodeplugin.podSecurityPolicy.enabled=true --set provisioner.replicaCount=1 ${RBD_CHART_NAME} "${SCRIPT_DIR}"/../charts/ceph-csi-rbd --set topology.enabled=true --set topology.domainLabels="{${NODE_LABEL_REGION},${NODE_LABEL_ZONE}}" --set provisioner.maxSnapshotsOnImage=3
check_deployment_status app=ceph-csi-rbd ${NAMESPACE}
check_daemonset_status app=ceph-csi-rbd ${NAMESPACE}