apiVersion: v1 kind: ReplicationController metadata: name: kubedns namespace: {{ system_namespace }} labels: k8s-app: kubedns version: v19 kubernetes.io/cluster-service: "true" spec: replicas: {{ dns_replicas }} selector: k8s-app: kubedns version: v19 template: metadata: labels: k8s-app: kubedns version: v19 kubernetes.io/cluster-service: "true" spec: containers: - name: kubedns image: "{{ kubedns_image_repo }}:{{ kubedns_image_tag }}" imagePullPolicy: {{ k8s_image_pull_policy }} resources: # TODO: Set memory limits when we've profiled the container for large # clusters, then set request = limit to keep this container in # guaranteed class. Currently, this container falls into the # "burstable" category so the kubelet doesn't backoff from restarting it. limits: cpu: {{ dns_cpu_limit }} memory: {{ dns_memory_limit }} requests: cpu: {{ dns_cpu_requests }} memory: {{ dns_memory_requests }} livenessProbe: httpGet: path: /healthz port: 8080 scheme: HTTP initialDelaySeconds: 60 timeoutSeconds: 5 successThreshold: 1 failureThreshold: 5 readinessProbe: httpGet: path: /readiness port: 8081 scheme: HTTP # we poll on pod startup for the Kubernetes master service and # only setup the /readiness HTTP server once that's available. initialDelaySeconds: 30 timeoutSeconds: 5 args: # command = "/kube-dns" - --domain={{ dns_domain }}. - --dns-port=10053 - --v={{ kube_log_level }} ports: - containerPort: 10053 name: dns-local protocol: UDP - containerPort: 10053 name: dns-tcp-local protocol: TCP - name: dnsmasq image: "{{ kubednsmasq_image_repo }}:{{ kubednsmasq_image_tag }}" imagePullPolicy: {{ k8s_image_pull_policy }} resources: limits: cpu: {{ dns_cpu_limit }} memory: {{ dns_memory_limit }} requests: cpu: {{ dns_cpu_requests }} memory: {{ dns_memory_requests }} args: - --log-facility=- - --cache-size=1000 - --no-resolv - --server=/{{ dns_domain }}/127.0.0.1#10053 - --local=/internal./local./lc./{{ private_domains }} {% if upstream_dns_servers is defined %} {% for srv in upstream_dns_servers %} - --server={{ srv }} {% endfor %} {% else %} - --server={{ default_resolver }} {% endif %} {% if kube_log_level == '4' %} - --log-queries {% endif %} ports: - containerPort: 53 name: dns protocol: UDP - containerPort: 53 name: dns-tcp protocol: TCP - name: healthz image: "{{ exechealthz_image_repo }}:{{ exechealthz_image_tag }}" imagePullPolicy: {{ k8s_image_pull_policy }} resources: # keep request = limit to keep this container in guaranteed class limits: cpu: 10m memory: 50Mi requests: cpu: 10m # Note that this container shouldn't really need 50Mi of memory. The # limits are set higher than expected pending investigation on #29688. # The extra memory was stolen from the kubedns container to keep the # net memory requested by the pod constant. memory: 50Mi args: - -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 - -port=8080 - -quiet ports: - containerPort: 8080 protocol: TCP dnsPolicy: Default # Don't use cluster DNS.