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move kube-dns remove statement to the end

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Sandeep Rajan
2021-03-05 12:12:27 -05:00
parent 5fcc8b2961
commit 3e9a73f7c2
1 changed files with 3 additions and 1 deletions
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content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
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@@ -436,13 +436,15 @@ A ServiceAccount for `kube-proxy` is created in the `kube-system` namespace; the
#### DNS #### DNS
- In Kubernetes version 1.21 kube-dns usage with kubeadm has been removed
- The CoreDNS service is named `kube-dns`. This is done to prevent any interruption - The CoreDNS service is named `kube-dns`. This is done to prevent any interruption
in service when the user is switching the cluster DNS from kube-dns to CoreDNS in service when the user is switching the cluster DNS from kube-dns to CoreDNS
the `--config` method described [here](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-addon) the `--config` method described [here](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-addon)
- A ServiceAccount for CoreDNS is created in the `kube-system` namespace. - A ServiceAccount for CoreDNS is created in the `kube-system` namespace.
- The `coredns` ServiceAccount is bound to the privileges in the `system:coredns` ClusterRole - The `coredns` ServiceAccount is bound to the privileges in the `system:coredns` ClusterRole
- In Kubernetes version 1.21, support for using `kube-dns` with kubeadm is removed.
You can use CoreDNS with kubeadm even when the related Service is named `kube-dns`.
## kubeadm join phases internal design ## kubeadm join phases internal design
Similarly to `kubeadm init`, also `kubeadm join` internal workflow consists of a sequence of atomic work tasks to perform. Similarly to `kubeadm init`, also `kubeadm join` internal workflow consists of a sequence of atomic work tasks to perform.