140 lines
4.1 KiB
YAML
140 lines
4.1 KiB
YAML
---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: kured
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rules:
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# Allow kured to read spec.unschedulable
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# Allow kubectl to drain/uncordon
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#
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# NB: These permissions are tightly coupled to the bundled version of kubectl; the ones below
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# match https://github.com/kubernetes/kubernetes/blob/v1.19.4/staging/src/k8s.io/kubectl/pkg/cmd/drain/drain.go
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#
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- apiGroups: [""]
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resources: ["nodes"]
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verbs: ["get", "patch"]
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- apiGroups: [""]
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resources: ["pods"]
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verbs: ["list","delete","get"]
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- apiGroups: ["apps"]
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resources: ["daemonsets"]
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verbs: ["get"]
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- apiGroups: [""]
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resources: ["pods/eviction"]
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verbs: ["create"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: kured
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: kured
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subjects:
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- kind: ServiceAccount
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name: kured
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namespace: kube-system
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: Role
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metadata:
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namespace: kube-system
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name: kured
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rules:
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# Allow kured to lock/unlock itself
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- apiGroups: ["apps"]
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resources: ["daemonsets"]
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resourceNames: ["kured"]
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verbs: ["update"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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namespace: kube-system
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name: kured
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subjects:
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- kind: ServiceAccount
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namespace: kube-system
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name: kured
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: Role
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name: kured
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: kured
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namespace: kube-system
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---
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apiVersion: apps/v1
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kind: DaemonSet
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metadata:
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name: kured # Must match `--ds-name`
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namespace: kube-system # Must match `--ds-namespace`
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spec:
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selector:
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matchLabels:
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name: kured
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updateStrategy:
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type: RollingUpdate
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template:
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metadata:
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labels:
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name: kured
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spec:
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serviceAccountName: kured
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tolerations:
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- key: node-role.kubernetes.io/master
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effect: NoSchedule
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hostPID: true # Facilitate entering the host mount namespace via init
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restartPolicy: Always
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containers:
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- name: kured
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image: docker.io/weaveworks/kured:1.8.0
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# If you find yourself here wondering why there is no
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# :latest tag on Docker Hub,see the FAQ in the README
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imagePullPolicy: IfNotPresent
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securityContext:
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privileged: true # Give permission to nsenter /proc/1/ns/mnt
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env:
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# Pass in the name of the node on which this pod is scheduled
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# for use with drain/uncordon operations and lock acquisition
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- name: KURED_NODE_ID
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valueFrom:
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fieldRef:
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fieldPath: spec.nodeName
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command:
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- /usr/bin/kured
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- --reboot-sentinel-command="/usr/bin/needs-restarting -r"
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# - --force-reboot=false
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# - --drain-grace-period=-1
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# - --skip-wait-for-delete-timeout=0
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# - --drain-timeout=0
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# - --period=1h
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# - --ds-namespace=kube-system
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# - --ds-name=kured
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# - --lock-annotation=weave.works/kured-node-lock
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# - --lock-ttl=0
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# - --prometheus-url=http://prometheus.monitoring.svc.cluster.local
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# - --alert-filter-regexp=^RebootRequired$
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# - --alert-firing-only=false
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# - --reboot-sentinel=/var/run/reboot-required
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# - --prefer-no-schedule-taint=""
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# - --slack-hook-url=https://hooks.slack.com/...
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# - --slack-username=prod
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# - --slack-channel=alerting
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# - --notify-url="" # See also shoutrrr url format
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# - --message-template-drain=Draining node %s
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# - --message-template-drain=Rebooting node %s
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# - --blocking-pod-selector=runtime=long,cost=expensive
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# - --blocking-pod-selector=name=temperamental
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# - --blocking-pod-selector=...
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# - --reboot-days=sun,mon,tue,wed,thu,fri,sat
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# - --start-time=0:00
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# - --end-time=23:59:59
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# - --time-zone=UTC
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# - --annotate-nodes=false
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# - --lock-release-delay=30m
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