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script to deploy kube-dns (#89)

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Sandeep Rajan 2018-08-20 15:26:26 -04:00 • committed by Chris O'Haver
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kubernetes/README.md
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@ -41,3 +41,21 @@ $ kubectl delete --namespace=kube-system deployment kube-dns
For non-RBAC deployments, you'll need to edit the resulting yaml before applying it:
1. Remove the line `serviceAccountName: coredns` from the `Deployment` section.
2. Remove the `ServiceAccount`, `ClusterRole`, and `ClusterRoleBinding` sections.
## Rollback to kube-dns
In case one wants to revert a Kubernetes cluster running CoreDNS back to kube-dns,
the `rollback.sh` script generates the kube-dns manifest to install kube-dns.
This uses the existing service, there is no disruption in servicing requests.
The script doesn't delete the CoreDNS deployment or replication controller - you'll have to
do that manually, after deploying kube-dns.
These commands will deploy kube-dns replacing CoreDNS:
~~~
$ ./rollback.sh | kubectl apply -f -
$ kubectl delete --namespace=kube-system deployment coredns
~~~
**NOTE:** You will need to delete the CoreDNS deployment (as above) since while CoreDNS and kube-dns are running at the same time, queries may randomly hit either one.