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Install Descheduler, fix startup readywait
Descheduler will be used for eve-app rebalancing during cluster node reboots/upgrades in an upcoming PR. Wait for longhorn daemonsets to be ready, before upcoming PR to snapshot single-node /var/lib kube db. Resolve sometimes failure to import external-boot-image Wait for containerd before importing. Tighter error checking on import. Signed-off-by: Andrew Durbin <andrewd@zededa.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| --- | ||
| # from: https://raw.githubusercontent.com/kubernetes-sigs/descheduler/v0.29.0/kubernetes/job/job.yaml | ||
| apiVersion: batch/v1 | ||
| kind: Job | ||
| metadata: | ||
| name: descheduler-job | ||
| namespace: kube-system | ||
| spec: | ||
| parallelism: 1 | ||
| completions: 1 | ||
| template: | ||
| metadata: | ||
| name: descheduler-pod | ||
| spec: | ||
| priorityClassName: system-cluster-critical | ||
| containers: | ||
| - name: descheduler | ||
| image: registry.k8s.io/descheduler/descheduler:v0.29.0 | ||
| volumeMounts: | ||
| - mountPath: /policy-dir | ||
| name: policy-volume | ||
| command: | ||
| - "/bin/descheduler" | ||
| args: | ||
| - "--policy-config-file" | ||
| - "/policy-dir/policy.yaml" | ||
| - "--v" | ||
| - "3" | ||
| resources: | ||
| requests: | ||
| cpu: "500m" | ||
| memory: "256Mi" | ||
| livenessProbe: | ||
| failureThreshold: 3 | ||
| httpGet: | ||
| path: /healthz | ||
| port: 10258 | ||
| scheme: HTTPS | ||
| initialDelaySeconds: 3 | ||
| periodSeconds: 10 | ||
| securityContext: | ||
| allowPrivilegeEscalation: false | ||
| capabilities: | ||
| drop: | ||
| - ALL | ||
| privileged: false | ||
| readOnlyRootFilesystem: true | ||
| runAsNonRoot: true | ||
| restartPolicy: "Never" | ||
| serviceAccountName: descheduler-sa | ||
| volumes: | ||
| - name: policy-volume | ||
| configMap: | ||
| name: descheduler-policy-configmap |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| # Copyright (c) 2024 Zededa, Inc. | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
| --- | ||
| # Override default policy to rebalance eve apps when descheduler is run. | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: descheduler-policy-configmap | ||
| namespace: kube-system | ||
| data: | ||
| policy.yaml: | | ||
| apiVersion: "descheduler/v1alpha2" | ||
| kind: "DeschedulerPolicy" | ||
| profiles: | ||
| - name: EveAppNodeAffinity | ||
| pluginConfig: | ||
| - name: "RemovePodsViolatingNodeAffinity" | ||
| args: | ||
| namespaces: | ||
| include: | ||
| - "eve-kube-app" | ||
| nodeAffinityType: | ||
| - "preferredDuringSchedulingIgnoredDuringExecution" | ||
| plugins: | ||
| deschedule: | ||
| enabled: | ||
| - "RemovePodsViolatingNodeAffinity" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| #!/bin/sh | ||
| # | ||
| # Copyright (c) 2024 Zededa, Inc. | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| DESCHEDULER_VERSION="v0.29.0" | ||
|
|
||
| descheduler_install() | ||
| { | ||
| logmsg "Applying Descheduler ${DESCHEDULER_VERSION}" | ||
| if ! kubectl apply -f /etc/descheduler_rbac.yaml; then | ||
| logmsg "descheduler rbac not yet applied" | ||
| return 1 | ||
| fi | ||
| if ! kubectl apply -f /etc/descheduler-policy-configmap.yaml; then | ||
| logmsg "descheduler configmap not yet applied" | ||
| return 1 | ||
| fi | ||
| return 0 | ||
| } |
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| @@ -0,0 +1,51 @@ | ||
| --- | ||
| # from: https://raw.githubusercontent.com/kubernetes-sigs/descheduler/refs/tags/v0.29.0/kubernetes/base/rbac.yaml | ||
| kind: ClusterRole | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: descheduler-cluster-role | ||
| rules: | ||
| - apiGroups: ["events.k8s.io"] | ||
| resources: ["events"] | ||
| verbs: ["create", "update"] | ||
| - apiGroups: [""] | ||
| resources: ["nodes"] | ||
| verbs: ["get", "watch", "list"] | ||
| - apiGroups: [""] | ||
| resources: ["namespaces"] | ||
| verbs: ["get", "watch", "list"] | ||
| - apiGroups: [""] | ||
| resources: ["pods"] | ||
| verbs: ["get", "watch", "list", "delete"] | ||
| - apiGroups: [""] | ||
| resources: ["pods/eviction"] | ||
| verbs: ["create"] | ||
| - apiGroups: ["scheduling.k8s.io"] | ||
| resources: ["priorityclasses"] | ||
| verbs: ["get", "watch", "list"] | ||
| - apiGroups: ["coordination.k8s.io"] | ||
| resources: ["leases"] | ||
| verbs: ["create"] | ||
| - apiGroups: ["coordination.k8s.io"] | ||
| resources: ["leases"] | ||
| resourceNames: ["descheduler"] | ||
| verbs: ["get", "patch", "delete"] | ||
| --- | ||
| apiVersion: v1 | ||
| kind: ServiceAccount | ||
| metadata: | ||
| name: descheduler-sa | ||
| namespace: kube-system | ||
| --- | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: ClusterRoleBinding | ||
| metadata: | ||
| name: descheduler-cluster-role-binding | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: ClusterRole | ||
| name: descheduler-cluster-role | ||
| subjects: | ||
| - name: descheduler-sa | ||
| kind: ServiceAccount | ||
| namespace: kube-system |
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