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update docs for coredns info

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This commit is contained in:
Sandeep Rajan
2018-01-03 19:29:58 +05:30
parent 195110cfce
commit 4f15e85ad6
3 changed files with 6 additions and 3 deletions
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docs/reference/setup-tools/kubeadm/kubeadm-alpha.md
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@@ -224,7 +224,7 @@ Alternatively, you can use [kubeadm config](kubeadm-config.md).
You can install all the available addons with the `all` subcommand, or You can install all the available addons with the `all` subcommand, or
install them selectively. install them selectively.
Please note that if kubeadm is invoked with `--feature-gates=CoreDNS`, CoreDNS is installed instead of `kube-dns`. Please note that if kubeadm is invoked with `--feature-gates=CoreDNS=true`, [CoreDNS](https://coredns.io/) is installed instead of `kube-dns`.
{% capture addon-all %} {% capture addon-all %}
{% include_relative generated/kubeadm_alpha_phase_addon_all.md %} {% include_relative generated/kubeadm_alpha_phase_addon_all.md %}
docs/reference/setup-tools/kubeadm/kubeadm-init.md
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@@ -75,7 +75,7 @@ following steps:
See [kubeadm join](kubeadm-join.md) for additional info. See [kubeadm join](kubeadm-join.md) for additional info.
1. Installs the internal DNS server and the kube-proxy addon components via the API server. 1. Installs the internal DNS server (kube-dns) and the kube-proxy addon components via the API server. If kubeadm is invoked with --feature-gates=CoreDNS=true, then [CoreDNS](https://coredns.io/) will be installed as the default internal DNS server instead of kube-dns.
Please note that although the DNS server is deployed, it will not be scheduled until CNI is installed. Please note that although the DNS server is deployed, it will not be scheduled until CNI is installed.
1. If `kubeadm init` is invoked with the alpha self-hosting feature enabled, 1. If `kubeadm init` is invoked with the alpha self-hosting feature enabled,
@@ -409,7 +409,7 @@ Here `v1.8.x` means the "latest patch release of the v1.8 branch".
`${ARCH}` can be one of: `amd64`, `arm`, `arm64`, `ppc64le` or `s390x`. `${ARCH}` can be one of: `amd64`, `arm`, `arm64`, `ppc64le` or `s390x`.
If using `--feature-gates=CoreDNS` image `coredns/coredns:1.0.0` is required (instead of the three `k8s-dns-*` images). If using `--feature-gates=CoreDNS=true` image `coredns/coredns:1.0.2` is required (instead of the three `k8s-dns-*` images).
### Automating kubeadm ### Automating kubeadm
docs/tasks/administer-cluster/kubeadm-upgrade-1-9.md
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@@ -114,6 +114,8 @@ _____________________________________________________________________
The `kubeadm upgrade plan` checks that your cluster is upgradeable and fetches the versions available to upgrade to in an user-friendly way. The `kubeadm upgrade plan` checks that your cluster is upgradeable and fetches the versions available to upgrade to in an user-friendly way.
To check CoreDNS version, include the `--feature-gates=CoreDNS=true` flag to verify the CoreDNS version which will be installed in place of kube-dns.
3. Pick a version to upgrade to and run. For example: 3. Pick a version to upgrade to and run. For example:
```shell ```shell
@@ -162,6 +164,7 @@ $ kubeadm upgrade apply v1.9.0
[upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets in turn. [upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets in turn.
``` ```
To upgrade the cluster with CoreDNS as the default internal DNS, invoke `kubeadm upgrade apply` with the `--feature-gates=CoreDNS=true` flag.
`kubeadm upgrade apply` does the following: `kubeadm upgrade apply` does the following:
- Checks that your cluster is in an upgradeable state: - Checks that your cluster is in an upgradeable state: