9cb12cf250
By default kubedns and dnsmasq scale when installed. Dnsmasq is no longer a daemonset. It is now a deployment. Kubedns is no longer a replicationcluster. It is now a deployment. Minimum replicas is two (to enable rolling updates). Reduced memory erquirements for dnsmasq and kubedns
115 lines
3.7 KiB
YAML
115 lines
3.7 KiB
YAML
apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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name: kubedns
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namespace: {{ system_namespace }}
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labels:
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k8s-app: kubedns
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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: {{ kubedns_min_replicas }}
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selector:
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matchLabels:
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k8s-app: kubedns
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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: kubedns
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version: v19
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kubernetes.io/cluster-service: "true"
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spec:
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containers:
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- name: kubedns
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image: "{{ kubedns_image_repo }}:{{ kubedns_image_tag }}"
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imagePullPolicy: {{ k8s_image_pull_policy }}
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resources:
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# TODO: Set memory limits when we've profiled the container for large
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# clusters, then set request = limit to keep this container in
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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: {{ dns_cpu_limit }}
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memory: {{ dns_memory_limit }}
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requests:
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cpu: {{ dns_cpu_requests }}
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memory: {{ dns_memory_requests }}
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livenessProbe:
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httpGet:
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path: /healthz
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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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readinessProbe:
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httpGet:
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path: /readiness
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port: 8081
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scheme: HTTP
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# we poll on pod startup for the Kubernetes master service and
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# only setup the /readiness HTTP server once that's available.
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initialDelaySeconds: 30
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timeoutSeconds: 5
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args:
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# command = "/kube-dns"
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- --domain={{ dns_domain }}.
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- --dns-port=10053
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- --v={{ kube_log_level }}
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ports:
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- containerPort: 10053
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name: dns-local
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protocol: UDP
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- containerPort: 10053
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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: "{{ kubednsmasq_image_repo }}:{{ kubednsmasq_image_tag }}"
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imagePullPolicy: {{ k8s_image_pull_policy }}
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resources:
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limits:
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cpu: {{ dns_cpu_limit }}
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memory: {{ dns_memory_limit }}
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requests:
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cpu: {{ dns_cpu_requests }}
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memory: {{ dns_memory_requests }}
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args:
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- --log-facility=-
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- --cache-size=1000
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- --no-resolv
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- --server=127.0.0.1#10053
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{% if kube_log_level == '4' %}
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- --log-queries
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{% endif %}
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ports:
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- containerPort: 53
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name: dns
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protocol: UDP
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- containerPort: 53
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name: dns-tcp
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protocol: TCP
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- name: healthz
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image: "{{ exechealthz_image_repo }}:{{ exechealthz_image_tag }}"
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imagePullPolicy: {{ k8s_image_pull_policy }}
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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: 50Mi
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requests:
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cpu: 10m
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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 && 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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ports:
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- containerPort: 8080
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protocol: TCP
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dnsPolicy: Default # Don't use cluster DNS.
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