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Deploy a Kubernetes cluster in DO using DOKS service.

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Requirements

  1. DO account
  2. doctl and DO credentials configured
  3. kubectl
  4. homebrew

Preferred Setup: LINUX/MAC

Windows users: Choose either:

  1. Deploy from a Linux VPS.
  2. Use Windows Subsystem for Linux - Learn more

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Steps

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Clone Repository

First, clone and enter the cluster-launcher repository. Run all commands within this repo.

git clone https://github.com/LastL2/cluster-launcher
cd cluster-launcher

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Install Terraform

Install the Terraform CLI:

Install Terraform:

brew install terraform

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DOCTL

The Digital Ocean Control tool allows you to manage your DO services.

Use the package manager homebrew to install the doctl.

brew install doctl
doctl auth init --context ((NAME))
doctl auth switch --context ((NAME))
doctl account get

You will be asked for a Personal Access Token with read/write privileges (retrieve from the API Panel in the Digital Ocean web console).

API -> Tokens/Keys -> Create Token.

Make sure you handle your secrets securely! You will need this token twice more for setup and if you navigate away from the API web console it will not be displayed again.

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Kubernetes Control Tool

You must install and configure the Kubernetes CLI tool (kubectl). To install kubectl, follow these instructions, or choose a package manager based on your operating system.

Use the package manager homebrew to install kubectl.

brew install kubernetes-cli

DO Droplet Limit

You will need to increase your Droplet Limit if you get an error like this:

Error: Error creating Kubernetes cluster: POST https://api.digitalocean.com/v2/kubernetes/clusters: 422 (request "8b639077-b8d3-4913-b3ec-8e70283dea49") validation error: worker_node_pool_specs[0].invalid droplet size

On the Digital Ocean web console (Settings > Team > Droplet Limit) you will be able to request the Droplet Limit be increased. 10 Droplets is the default limit, request 25 to begin with.

Check the versions of kubectl that are supported by DO

doctl kubernetes options versions

Make sure that you have installed a version of kubectl that is supported by DO.

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wget && jq

You also need wget and jq, follow these instructions, or choose a package manager based on your operating system.

Use the package manager homebrew to install wget and jq Note: You most likely have these installed already.

brew install wget
brew install jq

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Deploy Kubernetes Cluster

Use the commands below to deploy a DOKS cluster:

make do

During the deploy, you will be asked to enter information about your cluster:

var.location
  The location where the Managed Kubernetes Cluster should be created

  Enter a value: nyc1

var.name
  The base name used for all resources

  Enter a value: tc-k8s

Deploying a cluster takes ~10 minutes

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CONFIGURE

Now that you’ve provisioned your DOKS cluster, you need to configure kubectl. Customize the following command with your cluster name and region.

doctl kubernetes cluster kubeconfig save <use_your_cluster_name>
kubectl version

If successful, you will see:

Notice: Adding cluster credentials to kubeconfig file found in "/home/user/.kube/config"
Notice: Setting current-context to do-<region_name>-<cluster_name>

Test this configuration:

kubectl version
Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-16T06:30:04Z", GoVersion:"go1.14.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:51:04Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}

To verify, run this, and check the status is “Ready”:

kubectl get nodes

NAME                          STATUS   ROLES    AGE     VERSION
<cluster_name>-pool-5xhc1     READY    <none>   6m      v1.18.6

You are now ready to deploy a LastNode.

Setup - AzureSetup - Google Cloud