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Replace kube-dns with CoreDNS

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* Add system:coredns ClusterRole and binding
* Annotate CoreDNS for Prometheus metrics scraping
* Remove kube-dns deployment, service, & service account
* https://github.com/poseidon/terraform-render-bootkube/pull/71
* https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
This commit is contained in:
Dalton Hubble
2018-07-01 19:41:57 -07:00
parent ee31074679
commit 6f958d7577
34 changed files with 65 additions and 63 deletions
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4
docs/topics/hardware.md
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@ -85,7 +85,7 @@ Restart `dnsmasq`.
sudo /etc/init.d/dnsmasq restart
```
Configure queries for `*.svc.cluster.local` to be forwarded to a Kubernetes `kube-dns` service IP to allow hosts to resolve cluster-local Kubernetes names.
Configure queries for `*.svc.cluster.local` to be forwarded to the Kubernetes `coredns` service IP to allow hosts to resolve cluster-local Kubernetes names.
```
configure
@ -108,7 +108,7 @@ commit-confirm
### Port Forwarding
Expose the [Ingress Controller](/addons/ingress.md#bare-metal) by adding `port-forward` rules that DNAT a port on the router's WAN interface to an internal IP and port. By convention, a public Ingress controller is assigned a fixed service IP like kube-dns (e.g. 10.3.0.12).
Expose the [Ingress Controller](/addons/ingress.md#bare-metal) by adding `port-forward` rules that DNAT a port on the router's WAN interface to an internal IP and port. By convention, a public Ingress controller is assigned a fixed service IP (e.g. 10.3.0.12).
```
configure

4
docs/topics/maintenance.md
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@ -110,9 +110,9 @@ Apply complete! Resources: 0 added, 0 changed, 55 destroyed.
#### In-place Edits
Typhoon uses a self-hosted Kubernetes control plane which allows certain manifest upgrades to be performed in-place. Components like `apiserver`, `controller-manager`, `scheduler`, `flannel`/`calico`, `kube-dns`, and `kube-proxy` are run on Kubernetes itself and can be edited via `kubectl`. If you're interested, see the bootkube [upgrade docs](https://github.com/kubernetes-incubator/bootkube/blob/master/Documentation/upgrading.md).
Typhoon uses a self-hosted Kubernetes control plane which allows certain manifest upgrades to be performed in-place. Components like `apiserver`, `controller-manager`, `scheduler`, `flannel`/`calico`, `coredns`, and `kube-proxy` are run on Kubernetes itself and can be edited via `kubectl`. If you're interested, see the bootkube [upgrade docs](https://github.com/kubernetes-incubator/bootkube/blob/master/Documentation/upgrading.md).
In certain scenarios, in-place edits can be useful for quickly rolling out security patches (e.g. bumping `kube-dns`) or prioritizing speed over the safety of a proper cluster re-provision and transition.
In certain scenarios, in-place edits can be useful for quickly rolling out security patches (e.g. bumping `coredns`) or prioritizing speed over the safety of a proper cluster re-provision and transition.
!!! note
Rarely, we may test certain security in-place edits and mention them as an option in release notes.