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Add guide for getting token and discovery-token-ca-cert-hash #9017

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Jul 18, 2018
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Add guide for getting token and discovery-token-ca-cert-hash #9017

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34bd885
Add guide for getting token and discovery-token-ca-cert-hash
yujunz Jun 11, 2018
1113b45
Fix code snippet style
yujunz Jun 13, 2018
dff6a3a
Merge remote-tracking branch 'upstream/master' into kubeadm
yujunz Jun 15, 2018
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27 changes: 27 additions & 0 deletions content/en/docs/setup/independent/create-cluster-kubeadm.md
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Expand Up @@ -382,6 +382,33 @@ The nodes are where your workloads (containers and pods, etc) run. To add new no
kubeadm join --token <token> <master-ip>:<master-port> --discovery-token-ca-cert-hash sha256:<hash>
```

If you do not have the token, you can get it by running the following command on the master node:

``` bash
# kubeadm token list
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See https://kubernetes.io/docs/home/contribute/style-guide/#code-snippet-formatting - don't include the command prompt like "#", also further below

TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS
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https://kubernetes.io/docs/home/contribute/style-guide/#code-snippet-formatting - separate command from output

8ewj1p.9r9hcjoqgajrj4gi 23h 2018-06-12T02:51:28Z authentication, The default bootstrap system:
signing token generated by bootstrappers:
'kubeadm init'. kubeadm:
default-node-token
```

By default, tokens expire after 24 hours. If you are joining a node to the cluster after the current token has expired,
you can create a new token by running the following command on the master node:

``` bash
# kubeadm token create
5didvk.d09sbcov8ph2amjw
```

If you don't have the value of `--discovery-token-ca-cert-hash`, you can get it by running the following command chain on the master node:

``` bash
# openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | \
openssl dgst -sha256 -hex | sed 's/^.* //'
8cb2de97839780a412b93877f8507ad6c94f73add17d5d7058e91741c9d5ec78
```

{{< note >}}
**Note:** To specify an IPv6 tuple for `<master-ip>:<master-port>`, IPv6 address must be enclosed in square brackets, for example: `[fd00::101]:2073`.
{{< /note >}}
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