42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
# Deploying the Cluster DNS Add-on
|
|
|
|
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:
|
|
|
|
* DNS based service discovery
|
|
* DNS lookups from containers running in pods
|
|
|
|
## Cluster DNS Add-on
|
|
|
|
### Create the `kubedns` service:
|
|
|
|
```
|
|
kubectl create -f https://raw.githubusercontent.com/kelseyhightower/kubernetes-the-hard-way/master/services/kubedns.yaml
|
|
```
|
|
|
|
#### Verification
|
|
|
|
```
|
|
kubectl --namespace=kube-system get svc
|
|
```
|
|
```
|
|
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
|
kube-dns 10.32.0.10 <none> 53/UDP,53/TCP 5s
|
|
```
|
|
|
|
### Create the `kubedns` deployment:
|
|
|
|
```
|
|
kubectl create -f https://raw.githubusercontent.com/kelseyhightower/kubernetes-the-hard-way/master/deployments/kubedns.yaml
|
|
```
|
|
|
|
#### Verification
|
|
|
|
```
|
|
kubectl --namespace=kube-system get pods
|
|
```
|
|
```
|
|
NAME READY STATUS RESTARTS AGE
|
|
kube-dns-v19-965658604-c8g5d 3/3 Running 0 49s
|
|
kube-dns-v19-965658604-zwl3g 3/3 Running 0 49s
|
|
```
|