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kubeadm-init: Update the offline support section #10062

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Sep 10, 2018
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kubeadm-init: Update the offline support section #10062

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32 changes: 18 additions & 14 deletions content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
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Expand Up @@ -494,31 +494,35 @@ This process (steps 3-6) can also be triggered with `kubeadm phase selfhosting c

For running kubeadm without an internet connection you have to pre-pull the required master images for the version of choice:

| Image Name | v1.8 release branch version | v1.9 release branch version |
|----------------------------------------------------------|-----------------------------|-----------------------------|
| k8s.gcr.io/kube-apiserver-${ARCH} | v1.8.x | v1.9.x |
| k8s.gcr.io/kube-controller-manager-${ARCH} | v1.8.x | v1.9.x |
| k8s.gcr.io/kube-scheduler-${ARCH} | v1.8.x | v1.9.x |
| k8s.gcr.io/kube-proxy-${ARCH} | v1.8.x | v1.9.x |
| k8s.gcr.io/etcd-${ARCH} | 3.0.17 | 3.1.10 |
| k8s.gcr.io/pause-${ARCH} | 3.0 | 3.0 |
| k8s.gcr.io/k8s-dns-sidecar-${ARCH} | 1.14.5 | 1.14.7 |
| k8s.gcr.io/k8s-dns-kube-dns-${ARCH} | 1.14.5 | 1.14.7 |
| k8s.gcr.io/k8s-dns-dnsmasq-nanny-${ARCH} | 1.14.5 | 1.14.7 |

Here `v1.8.x` means the "latest patch release of the v1.8 branch".
| Image Name | v1.10 release branch version |
|--------------------------------------------|------------------------------|
| k8s.gcr.io/kube-apiserver-${ARCH} | v1.10.x |
| k8s.gcr.io/kube-controller-manager-${ARCH} | v1.10.x |
| k8s.gcr.io/kube-scheduler-${ARCH} | v1.10.x |
| k8s.gcr.io/kube-proxy-${ARCH} | v1.10.x |
| k8s.gcr.io/etcd-${ARCH} | 3.1.12 |
| k8s.gcr.io/pause-${ARCH} | 3.1 |
| k8s.gcr.io/k8s-dns-sidecar-${ARCH} | 1.14.8 |
| k8s.gcr.io/k8s-dns-kube-dns-${ARCH} | 1.14.8 |
| k8s.gcr.io/k8s-dns-dnsmasq-nanny-${ARCH} | 1.14.8 |
| coredns/coredns | 1.0.6 |

Here `v1.10.x` means the "latest patch release of the v1.10 branch".

`${ARCH}` can be one of: `amd64`, `arm`, `arm64`, `ppc64le` or `s390x`.

If you run Kubernetes version 1.10 or earlier, and if you set `--feature-gates=CoreDNS=true`,
you must also use the image `coredns/coredns:1.0.2`, instead of the three `k8s-dns-*` images.
you must also use the `coredns/coredns` image, instead of the three `k8s-dns-*` images.

In Kubernetes 1.11 and later, you can list and pull the images using the `kubeadm config images` sub-command:
```
kubeadm config images list
kubeadm config images pull
```

Starting with Kubernetes 1.12, the `k8s.gcr.io/kube-*`, `k8s.gcr.io/etcd` and `k8s.gcr.io/pause` images
don't require an `-${ARCH}` suffix.

### Automating kubeadm

Rather than copying the token you obtained from `kubeadm init` to each node, as
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