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[Digital Ocean] Update documentation for multi-master HA setup #8601

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Feb 21, 2020
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[Digital Ocean] Update documentation for multi-master HA setup #8601

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18 changes: 14 additions & 4 deletions docs/getting_started/digitalocean.md
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Expand Up @@ -28,7 +28,7 @@ export S3_SECRET_ACCESS_KEY=<secret-key> # where <secret-key> is the Spaces API
export KOPS_FEATURE_FLAGS="AlphaAllowDO"
```

## Creating a Cluster
## Creating a Single Master Cluster

In the following examples, `example.com` should be replaced with the DigitalOcean domain you created when going through the [Requirements](#requirements).
Note that you kops will only be able to successfully provision clusters in regions that support block storage (AMS3, BLR1, FRA1, LON1, NYC1, NYC3, SFO2, SGP1 and TOR1).
Expand All @@ -50,10 +50,20 @@ kops update cluster my-cluster.example.com --yes
kops delete cluster my-cluster.example.com --yes
```

## Creating a Multi-Master HA Cluster

In the below example, `dev5.k8s.local` should be replaced with any cluster name that ends with `.k8s.local` such that a gossip based cluster is created.
Ensure the master-count is odd-numbered. A load balancer is created dynamically front-facing the master instances.

# coreos (the default) + flannel overlay cluster in tor1 with 3 master setup and a public load balancer.
kops create cluster --cloud=digitalocean --name=dev5.k8s.local --networking=cilium --api-loadbalancer-type=public --master-count=3 --zones=tor1 --ssh-public-key=~/.ssh/id_rsa.pub --yes

# to delete a cluster - this will also delete the load balancer associated with the cluster.
kops delete cluster dev5.k8s.local --yes


## Features Still in Development

kops for DigitalOcean currently does not support these features:

* multi master kubernetes clusters
* rolling update for instance groups
* multi-region clusters
* rolling update for instance groups