Merge "Update Kubernetes examples"
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commit
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@ -1,35 +1,117 @@
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#cloud-config
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merge_how: dict(recurse_array)+list(append)
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write_files:
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- path: /etc/kubernetes/examples/web-pod.yaml
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- path: /etc/kubernetes/examples/replication-controller.yaml
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owner: "root:root"
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permissions: "0644"
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content: |
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apiVersion: v1
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kind: ReplicationController
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metadata:
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name: nginx-controller
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spec:
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replicas: 2
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# selector identifies the set of pods that this
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# replication controller is responsible for managing
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selector:
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name: nginx
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# template defines the 'cookie cutter' used for creating
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# new pods when necessary
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template:
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metadata:
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labels:
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# Important: these labels need to match the selector above
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# The api server enforces this constraint.
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name: nginx
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spec:
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containers:
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- name: nginx
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image: nginx
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ports:
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- containerPort: 80
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- path: /etc/kubernetes/examples/pod-nginx-with-label.yaml
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owner: "root:root"
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permissions: "0644"
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content: |
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apiVersion: v1
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kind: Pod
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metadata:
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name: nginx
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labels:
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name: web
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name: web
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app: nginx
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spec:
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containers:
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- name: web
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image: larsks/thttpd
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- name: nginx
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image: nginx
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ports:
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- name: web
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containerPort: 80
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- path: /etc/kubernetes/examples/web-service.yaml
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- containerPort: 80
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- path: /etc/kubernetes/examples/service.yaml
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owner: "root:root"
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permissions: "0644"
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content: |
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apiVersion: v1
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kind: Service
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metadata:
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name: web
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name: nginx-service
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spec:
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ports:
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- name: web
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port: 8000
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- port: 8000 # the port that this service should serve on
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# the container on each pod to connect to, can be a name
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# (e.g. 'www') or a number (e.g. 80)
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targetPort: 80
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protocol: TCP
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# just like the selector in the replication controller,
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# but this time it identifies the set of pods to load balance
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# traffic to.
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selector:
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name: web
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app: nginx
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- path: /etc/kubernetes/examples/README.md
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owner: "root:root"
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permissions: "0644"
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content: |
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Kubernetes 101 (http://kubernetes.io/v1.0/docs/user-guide/walkthrough/README.html)
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==================================================================================
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List all nodes:
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kubectl get nodes
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Replication Controllers:
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kubectl create -f /etc/kubernetes/examples/replication-controller.yaml
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kubectl get rc
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kubectl delete rc nginx-controller
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Pods:
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kubectl create -f /etc/kubernetes/examples/pod-nginx-with-label.yaml
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kubectl get pods
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curl http://$(kubectl get pod nginx -o=template -t={{.status.podIP}})
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Services:
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kubectl create -f /etc/kubernetes/examples/service.yaml
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kubectl get services
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export SERVICE_IP=$(kubectl get service nginx-service -o=template -t={{.spec.clusterIP}})
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export SERVICE_PORT=$(kubectl get service nginx-service -o=template '-t={{(index .spec.ports 0).port}}')
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curl http://${SERVICE_IP}:${SERVICE_PORT}
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kubectl delete service nginx-service
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Troubleshooting:
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kubectl get events
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kubectl describe rc nginx-controller
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kubectl describe pod nginx
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kubectl describe service nginx-service
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kubectl exec nginx env
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kubectl exec -ti nginx -- bash
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