45 lines
1.1 KiB
Markdown
45 lines
1.1 KiB
Markdown
# Deploying the Cluster DNS Add-on
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In this lab you will deploy the DNS add-on which is required for every Kubernetes cluster. Without the DNS add-on the following things will not work:
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* DNS based service discovery
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* DNS lookups from containers running in pods
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## Cluster DNS Add-on
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```
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kubectl create clusterrolebinding serviceaccounts-cluster-admin \
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--clusterrole=cluster-admin \
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--group=system:serviceaccounts
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```
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Create the `kubedns` service:
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```
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kubectl create -f https://raw.githubusercontent.com/kelseyhightower/kubernetes-the-hard-way/master/services/kubedns.yaml
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```
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```
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kubectl --namespace=kube-system get svc
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```
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```
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NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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kube-dns 10.32.0.10 <none> 53/UDP,53/TCP 5s
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```
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Create the `kubedns` deployment:
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```
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kubectl create -f https://raw.githubusercontent.com/kelseyhightower/kubernetes-the-hard-way/master/deployments/kubedns.yaml
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```
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```
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kubectl --namespace=kube-system get pods
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```
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```
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NAME READY STATUS RESTARTS AGE
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kube-dns-321336704-6749s 4/4 Running 0 10s
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```
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