Getting Started with kops on DigitalOcean

WARNING: digitalocean support on kops is currently alpha meaning it is in the early stages of development and subject to change, please use with caution.

Requirements

• kops version >= 1.9 installed
• kubectl installed
• DigitalOcean account
• DigitalOcean access token
• DigitalOcean Spaces bucket with API Keys
• DigitalOcean domain. To point your domain registrar to DigitalOcean's nameservers follow this guide
• Setup your SSH key

Environment Variables

It is important to set the following environment variables:

export KOPS_STATE_STORE=do://<bucket-name> # where <bucket-name> is the name of the bucket you set earlier
export DIGITALOCEAN_ACCESS_TOKEN=<access-token>  # where <access-token> is the access token generated earlier to use the V2 API
 
# DigitalOCcean Spaces is S3 compatible so we just override some S3 configurations to talk to our bucket
export S3_ENDPOINT=nyc3.digitaloceanspaces.com # this can also be ams3.digitaloceanspaces.com or sgp1.digitaloceanspaces.com depending on where you created your Spaces bucket
export S3_ACCESS_KEY_ID=<access-key-id>  # where <access-key-id> is the Spaces API Access Key for your bucket
export S3_SECRET_ACCESS_KEY=<secret-key>  # where <secret-key> is the Spaces API Secret Key for your bucket
 
# this is required since DigitalOcean support is currently in alpha so it is feature gated
export KOPS_FEATURE_FLAGS="AlphaAllowDO"

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.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).

# coreos (the default) + flannel overlay cluster in tor1
kops create cluster --cloud=digitalocean --name=my-cluster.example.com --networking=flannel --zones=tor1 --ssh-public-key=~/.ssh/id_rsa.pub
kops update cluster my-cluster.example.com --yes
 
# ubuntu + weave overlay cluster in nyc1 using larger droplets
kops create cluster --cloud=digitalocean --name=my-cluster.example.com --image=ubuntu-16-04-x64 --networking=weave --zones=nyc1 --ssh-public-key=~/.ssh/id_rsa.pub --node-size=s-8vcpu-32gb
kops update cluster my-cluster.example.com --yes
 
# debian + flannel overlay cluster in ams3 using optimized droplets
kops create cluster --cloud=digitalocean --name=my-cluster.example.com --image=debian-9-x64 --networking=flannel --zones=ams3 --ssh-public-key=~/.ssh/id_rsa.pub --node-size=c-4
kops update cluster my-cluster.example.com --yes
 
# to delete a cluster
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:

• rolling update for instance groups