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fix cloud-dns README links (kubernetes#227)
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@foo0x29a @idvoretskyi
foo0x29a authored and idvoretskyi committed May 2, 2018
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40 changes: 20 additions & 20 deletions staging/cluster-dns/README.md
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Expand Up @@ -16,8 +16,8 @@ $ hack/dev-build-and-up.sh
We'll see how cluster DNS works across multiple [namespaces](https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/), first we need to create two namespaces:

```sh
$ kubectl create -f examples/cluster-dns/namespace-dev.yaml
$ kubectl create -f examples/cluster-dns/namespace-prod.yaml
$ kubectl create -f examples/staging/cluster-dns/namespace-dev.yaml
$ kubectl create -f examples/staging/cluster-dns/namespace-prod.yaml
```

Now list all namespaces:
Expand All @@ -42,11 +42,11 @@ $ kubectl config set-context prod --namespace=production --cluster=${CLUSTER_NAM

### Step Two: Create backend replication controller in each namespace

Use the file [`examples/cluster-dns/dns-backend-rc.yaml`](dns-backend-rc.yaml) to create a backend server [replication controller](https://kubernetes.io/docs/concepts/workloads/controllers/replicationcontroller/) in each namespace.
Use the file [`examples/staging/cluster-dns/dns-backend-rc.yaml`](dns-backend-rc.yaml) to create a backend server [replication controller](https://kubernetes.io/docs/concepts/workloads/controllers/replicationcontroller/) in each namespace.

```sh
$ kubectl config use-context dev
$ kubectl create -f examples/cluster-dns/dns-backend-rc.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-backend-rc.yaml
```

Once that's up you can list the pod in the cluster:
Expand All @@ -61,20 +61,20 @@ Now repeat the above commands to create a replication controller in prod namespa

```sh
$ kubectl config use-context prod
$ kubectl create -f examples/cluster-dns/dns-backend-rc.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-backend-rc.yaml
$ kubectl get rc
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
dns-backend dns-backend ddysher/dns-backend name=dns-backend 1
```

### Step Three: Create backend service

Use the file [`examples/cluster-dns/dns-backend-service.yaml`](dns-backend-service.yaml) to create
Use the file [`examples/staging/cluster-dns/dns-backend-service.yaml`](dns-backend-service.yaml) to create
a [service](https://kubernetes.io/docs/concepts/services-networking/service/) for the backend server.

```sh
$ kubectl config use-context dev
$ kubectl create -f examples/cluster-dns/dns-backend-service.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-backend-service.yaml
```

Once that's up you can list the service in the cluster:
Expand All @@ -89,19 +89,19 @@ Again, repeat the same process for prod namespace:

```sh
$ kubectl config use-context prod
$ kubectl create -f examples/cluster-dns/dns-backend-service.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-backend-service.yaml
$ kubectl get service dns-backend
NAME CLUSTER_IP EXTERNAL_IP PORT(S) SELECTOR AGE
dns-backend 10.0.2.4 <none> 8000/TCP name=dns-backend 1d
```

### Step Four: Create client pod in one namespace

Use the file [`examples/cluster-dns/dns-frontend-pod.yaml`](dns-frontend-pod.yaml) to create a client [pod](https://kubernetes.io/docs/concepts/workloads/pods/pod/) in dev namespace. The client pod will make a connection to backend and exit. Specifically, it tries to connect to address `http://dns-backend.development.cluster.local:8000`.
Use the file [`examples/staging/cluster-dns/dns-frontend-pod.yaml`](dns-frontend-pod.yaml) to create a client [pod](https://kubernetes.io/docs/concepts/workloads/pods/pod/) in dev namespace. The client pod will make a connection to backend and exit. Specifically, it tries to connect to address `http://dns-backend.development.cluster.local:8000`.

```sh
$ kubectl config use-context dev
$ kubectl create -f examples/cluster-dns/dns-frontend-pod.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-frontend-pod.yaml
```

Once that's up you can list the pod in the cluster:
Expand All @@ -128,7 +128,7 @@ If we switch to prod namespace with the same pod config, we'll see the same resu

```sh
$ kubectl config use-context prod
$ kubectl create -f examples/cluster-dns/dns-frontend-pod.yaml
$ kubectl create -f examples/staging/cluster-dns/dns-frontend-pod.yaml
$ kubectl logs dns-frontend
2015-05-07T20:13:54.147664936Z 10.0.236.129
2015-05-07T20:13:54.147721290Z Send request to: http://dns-backend.development.cluster.local:8000
Expand All @@ -148,8 +148,8 @@ For those of you who are impatient, here is the summary of the commands we ran i

```sh
# create dev and prod namespaces
kubectl create -f examples/cluster-dns/namespace-dev.yaml
kubectl create -f examples/cluster-dns/namespace-prod.yaml
kubectl create -f examples/staging/cluster-dns/namespace-dev.yaml
kubectl create -f examples/staging/cluster-dns/namespace-prod.yaml

# create two contexts
CURRENT_CONTEXT=$(kubectl config view -o jsonpath='{.current-context}')
Expand All @@ -160,27 +160,27 @@ kubectl config set-context prod --namespace=production --cluster=${CLUSTER_NAME}

# create two backend replication controllers
kubectl config use-context dev
kubectl create -f examples/cluster-dns/dns-backend-rc.yaml
kubectl create -f examples/staging/cluster-dns/dns-backend-rc.yaml
kubectl config use-context prod
kubectl create -f examples/cluster-dns/dns-backend-rc.yaml
kubectl create -f examples/staging/cluster-dns/dns-backend-rc.yaml

# create backend services
kubectl config use-context dev
kubectl create -f examples/cluster-dns/dns-backend-service.yaml
kubectl create -f examples/staging/cluster-dns/dns-backend-service.yaml
kubectl config use-context prod
kubectl create -f examples/cluster-dns/dns-backend-service.yaml
kubectl create -f examples/staging/cluster-dns/dns-backend-service.yaml

# create a pod in each namespace and get its output
kubectl config use-context dev
kubectl create -f examples/cluster-dns/dns-frontend-pod.yaml
kubectl create -f examples/staging/cluster-dns/dns-frontend-pod.yaml
kubectl logs dns-frontend

kubectl config use-context prod
kubectl create -f examples/cluster-dns/dns-frontend-pod.yaml
kubectl create -f examples/staging/cluster-dns/dns-frontend-pod.yaml
kubectl logs dns-frontend
```


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