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Merge pull request #32406 from MrHohn/kubedns-healthz
Automatic merge from submit-queue Split dns healthcheck into two different urls Attempt to fix #30633. <s>This new kube-dns pod template creates two exechealthz processes listen on two different ports for kubedns and dnsmasq correspondingly. @thockin @girishkalele
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b79c99da1b
@ -35,7 +35,6 @@ spec:
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labels:
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k8s-app: kube-dns
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version: v19
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kubernetes.io/cluster-service: "true"
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annotations:
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scheduler.alpha.kubernetes.io/critical-pod: ''
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scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
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@ -55,7 +54,7 @@ spec:
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memory: 70Mi
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livenessProbe:
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httpGet:
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path: /healthz
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path: /healthz-kubedns
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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@ -85,6 +84,15 @@ spec:
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protocol: TCP
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- name: dnsmasq
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image: gcr.io/google_containers/kube-dnsmasq-amd64:1.3
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livenessProbe:
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httpGet:
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path: /healthz-dnsmasq
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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timeoutSeconds: 5
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successThreshold: 1
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failureThreshold: 5
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args:
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- --cache-size=1000
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- --no-resolv
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@ -98,7 +106,7 @@ spec:
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name: dns-tcp
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protocol: TCP
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- name: healthz
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image: gcr.io/google_containers/exechealthz-amd64:1.1
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image: gcr.io/google_containers/exechealthz-amd64:1.2
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resources:
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limits:
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memory: 50Mi
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@ -110,9 +118,12 @@ spec:
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# net memory requested by the pod constant.
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memory: 50Mi
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args:
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- -cmd=nslookup kubernetes.default.svc.__PILLAR__DNS__DOMAIN__ 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.__PILLAR__DNS__DOMAIN__ 127.0.0.1:10053 >/dev/null
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- -port=8080
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- -quiet
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- --cmd=nslookup kubernetes.default.svc.__PILLAR__DNS__DOMAIN__ 127.0.0.1 >/dev/null
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- --url=/healthz-dnsmasq
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- --cmd=nslookup kubernetes.default.svc.__PILLAR__DNS__DOMAIN__ 127.0.0.1:10053 >/dev/null
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- --url=/healthz-kubedns
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- --port=8080
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- --quiet
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ports:
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- containerPort: 8080
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protocol: TCP
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@ -55,7 +55,7 @@ spec:
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memory: 70Mi
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livenessProbe:
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httpGet:
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path: /healthz
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path: /healthz-kubedns
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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@ -97,8 +97,17 @@ spec:
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- containerPort: 53
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name: dns-tcp
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protocol: TCP
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livenessProbe:
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httpGet:
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path: /healthz-dnsmasq
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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timeoutSeconds: 5
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successThreshold: 1
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failureThreshold: 5
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- name: healthz
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image: gcr.io/google_containers/exechealthz-amd64:1.1
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image: gcr.io/google_containers/exechealthz-amd64:1.2
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resources:
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limits:
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memory: 50Mi
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@ -110,9 +119,12 @@ spec:
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# net memory requested by the pod constant.
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memory: 50Mi
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args:
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- -cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1:10053 >/dev/null
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- -port=8080
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- -quiet
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- --cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1 >/dev/null
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- --url=/healthz-dnsmasq
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- --cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1:10053 >/dev/null
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- --url=/healthz-kubedns
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- --port=8080
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- --quiet
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ports:
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- containerPort: 8080
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protocol: TCP
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@ -55,7 +55,7 @@ spec:
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memory: 70Mi
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livenessProbe:
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httpGet:
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path: /healthz
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path: /healthz-kubedns
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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@ -96,8 +96,17 @@ spec:
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- containerPort: 53
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name: dns-tcp
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protocol: TCP
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livenessProbe:
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httpGet:
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path: /healthz-dnsmasq
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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timeoutSeconds: 5
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successThreshold: 1
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failureThreshold: 5
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- name: healthz
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image: gcr.io/google_containers/exechealthz-amd64:1.1
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image: gcr.io/google_containers/exechealthz-amd64:1.2
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resources:
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limits:
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memory: 50Mi
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@ -109,9 +118,12 @@ spec:
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# net memory requested by the pod constant.
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memory: 50Mi
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args:
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- -cmd=nslookup kubernetes.default.svc.$DNS_DOMAIN 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.$DNS_DOMAIN 127.0.0.1:10053 >/dev/null
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- -port=8080
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- -quiet
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- --cmd=nslookup kubernetes.default.svc.$DNS_DOMAIN 127.0.0.1 >/dev/null
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- --url=/healthz-dnsmasq
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- --cmd=nslookup kubernetes.default.svc.$DNS_DOMAIN 127.0.0.1:10053 >/dev/null
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- --url=/healthz-kubedns
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- --port=8080
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- --quiet
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ports:
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- containerPort: 8080
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protocol: TCP
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@ -1,23 +1,25 @@
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apiVersion: v1
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kind: ReplicationController
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metadata:
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name: kube-dns-v15
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name: kube-dns-v19
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namespace: kube-system
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labels:
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k8s-app: kube-dns
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version: v15
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version: v19
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kubernetes.io/cluster-service: "true"
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spec:
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replicas: ${DNS_REPLICAS}
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selector:
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k8s-app: kube-dns
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version: v15
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version: v19
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template:
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metadata:
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labels:
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k8s-app: kube-dns
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version: v15
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kubernetes.io/cluster-service: "true"
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version: v19
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annotations:
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scheduler.alpha.kubernetes.io/critical-pod: ''
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scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
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spec:
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containers:
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- name: kubedns
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@ -28,14 +30,13 @@ spec:
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# guaranteed class. Currently, this container falls into the
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# "burstable" category so the kubelet doesn't backoff from restarting it.
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limits:
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cpu: 100m
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memory: 200Mi
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requests:
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cpu: 100m
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memory: 100Mi
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livenessProbe:
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httpGet:
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path: /healthz
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path: /healthz-kubedns
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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@ -63,7 +64,16 @@ spec:
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name: dns-tcp-local
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protocol: TCP
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- name: dnsmasq
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image: gcr.io/google_containers/dnsmasq:1.1
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image: gcr.io/google_containers/dnsmasq:1.3
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livenessProbe:
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httpGet:
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path: /healthz-dnsmasq
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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timeoutSeconds: 5
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successThreshold: 1
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failureThreshold: 5
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args:
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- --cache-size=1000
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- --no-resolv
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@ -77,18 +87,24 @@ spec:
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name: dns-tcp
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protocol: TCP
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- name: healthz
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image: gcr.io/google_containers/exechealthz-amd64:1.0
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image: gcr.io/google_containers/exechealthz-amd64:1.2
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resources:
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# keep request = limit to keep this container in guaranteed class
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limits:
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cpu: 10m
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memory: 20Mi
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memory: 50Mi
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requests:
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cpu: 10m
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memory: 20Mi
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# Note that this container shouldn't really need 50Mi of memory. The
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# limits are set higher than expected pending investigation on #29688.
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# The extra memory was stolen from the kubedns container to keep the
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# net memory requested by the pod constant.
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memory: 50Mi
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args:
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- -cmd=nslookup kubernetes.default.svc.${DNS_DOMAIN} 127.0.0.1 >/dev/null
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- -port=8080
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- --cmd=nslookup kubernetes.default.svc.${DNS_DOMAIN} 127.0.0.1 >/dev/null
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- --url=/healthz-dnsmasq
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- --cmd=nslookup kubernetes.default.svc.${DNS_DOMAIN} 127.0.0.1:10053 >/dev/null
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- --url=/healthz-kubedns
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- --port=8080
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- --quiet
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ports:
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- containerPort: 8080
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protocol: TCP
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@ -12,30 +12,30 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This file should be kept in sync with cluster/images/hyperkube/dns-rc.yaml
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# Warning: This is a file generated from the base underscore template file: skydns-rc.yaml.base
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apiVersion: v1
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kind: ReplicationController
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metadata:
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name: kube-dns-v18
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name: kube-dns-v19
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namespace: kube-system
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labels:
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k8s-app: kube-dns
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version: v18
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version: v19
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kubernetes.io/cluster-service: "true"
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spec:
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replicas: {{ pillar['dns_replicas'] }}
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selector:
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k8s-app: kube-dns
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version: v18
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version: v19
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template:
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metadata:
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labels:
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k8s-app: kube-dns
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version: v18
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kubernetes.io/cluster-service: "true"
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version: v19
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annotations:
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scheduler.alpha.kubernetes.io/critical-pod: ''
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scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
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spec:
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containers:
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- name: kubedns
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@ -46,14 +46,13 @@ spec:
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# guaranteed class. Currently, this container falls into the
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# "burstable" category so the kubelet doesn't backoff from restarting it.
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limits:
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cpu: 100m
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memory: 200Mi
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requests:
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cpu: 100m
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memory: 100Mi
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livenessProbe:
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httpGet:
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path: /healthz
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path: /healthz-kubedns
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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@ -84,6 +83,15 @@ spec:
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protocol: TCP
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- name: dnsmasq
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image: gcr.io/google_containers/kube-dnsmasq-{{ arch }}:1.3
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livenessProbe:
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httpGet:
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path: /healthz-dnsmasq
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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timeoutSeconds: 5
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successThreshold: 1
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failureThreshold: 5
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args:
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- --cache-size=1000
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- --no-resolv
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@ -97,19 +105,24 @@ spec:
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name: dns-tcp
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protocol: TCP
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- name: healthz
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image: gcr.io/google_containers/exechealthz-{{ arch }}:1.0
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image: gcr.io/google_containers/exechealthz-{{ arch }}:1.2
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resources:
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# keep request = limit to keep this container in guaranteed class
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limits:
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cpu: 10m
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memory: 20Mi
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memory: 50Mi
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requests:
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cpu: 10m
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memory: 20Mi
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# Note that this container shouldn't really need 50Mi of memory. The
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# limits are set higher than expected pending investigation on #29688.
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# The extra memory was stolen from the kubedns container to keep the
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# net memory requested by the pod constant.
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memory: 50Mi
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args:
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- -cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1:10053 >/dev/null
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- -port=8080
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- -quiet
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- --cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1 >/dev/null
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- --url=/healthz-dnsmasq
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- --cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1:10053 >/dev/null
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- --url=/healthz-kubedns
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- --port=8080
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- --quiet
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ports:
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- containerPort: 8080
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protocol: TCP
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