text stringlengths 0 59.1k |
|---|
kubernetes.io/psp: privileged |
privileged: true |
``` |
<|endoftext|> |
# source: k8s_examples/_archived/sharing-clusters/README.md type: docs |
# Sharing Clusters |
This example demonstrates how to access one kubernetes cluster from another. It only works if both clusters are running on the same network, on a cloud provider that provides a private ip range per network (eg: GCE, GKE, AWS). |
## Setup |
Create a cluster in US (you don't need to do this if you already have a running kubernetes cluster) |
```shell |
$ cluster/kube-up.sh |
``` |
Before creating our second cluster, lets have a look at the kubectl config: |
```yaml |
apiVersion: v1 |
clusters: |
- cluster: |
certificate-authority-data: REDACTED |
server: https://104.197.84.16 |
name: <clustername_us> |
... |
current-context: <clustername_us> |
... |
``` |
Now spin up the second cluster in Europe |
```shell |
$ ./cluster/kube-up.sh |
$ KUBE_GCE_ZONE=europe-west1-b KUBE_GCE_INSTANCE_PREFIX=eu ./cluster/kube-up.sh |
``` |
Your kubectl config should contain both clusters: |
```yaml |
apiVersion: v1 |
clusters: |
- cluster: |
certificate-authority-data: REDACTED |
server: https://146.148.25.221 |
name: <clustername_eu> |
- cluster: |
certificate-authority-data: REDACTED |
server: https://104.197.84.16 |
name: <clustername_us> |
... |
current-context: kubernetesdev_eu |
... |
``` |
And kubectl get nodes should agree: |
``` |
$ kubectl get nodes |
NAME LABELS STATUS |
eu-node-0n61 kubernetes.io/hostname=eu-node-0n61 Ready |
eu-node-79ua kubernetes.io/hostname=eu-node-79ua Ready |
eu-node-7wz7 kubernetes.io/hostname=eu-node-7wz7 Ready |
eu-node-loh2 kubernetes.io/hostname=eu-node-loh2 Ready |
$ kubectl config use-context <clustername_us> |
$ kubectl get nodes |
NAME LABELS STATUS |
kubernetes-node-5jtd kubernetes.io/hostname=kubernetes-node-5jtd Ready |
kubernetes-node-lqfc kubernetes.io/hostname=kubernetes-node-lqfc Ready |
kubernetes-node-sjra kubernetes.io/hostname=kubernetes-node-sjra Ready |
kubernetes-node-wul8 kubernetes.io/hostname=kubernetes-node-wul8 Ready |
``` |
## Testing reachability |
For this test to work we'll need to create a service in europe: |
``` |
$ kubectl config use-context <clustername_eu> |
$ kubectl create -f /tmp/secret.json |
$ kubectl create -f examples/https-nginx/nginx-app.yaml |
$ kubectl exec -it my-nginx-luiln -- echo "Europe nginx" >> /usr/share/nginx/html/index.html |
$ kubectl get ep |
NAME ENDPOINTS |
kubernetes 10.240.249.92:443 |
nginxsvc 10.244.0.4:80,10.244.0.4:443 |
``` |
Just to test reachability, we'll try hitting the Europe nginx from our initial US central cluster. Create a basic curl pod in the US cluster: |
```yaml |
apiVersion: v1 |
kind: Pod |
metadata: |
name: curlpod |
spec: |
containers: |
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