Today, I’ll show how to create Kubernetes cluster on Linode using CLI. It might be useful, for instance, for CI/CD, automation processes, etc…
What is Linode?
Linode is a cloud provider recently purchased by Akamai. With this purchase, Akamai became a competitor in the cloud providers market. Linode offers managed Kubernetes service of various competitive pricing and cluster sizing options. We saw already how easy it is to create Kubernetes Cluster on Linode using its cloud manager UI. The time has come to show how easy it is to create a Kubernetes cluster on Linode using CLI.
As soon as you discover the charm of automation, its speed and ease of use, your search for doing stuff using CLI. The same is true for creating Kubernetes clusters on Linode. With the courteousness of Linode developers and its open source community, linode-cli was developed. While you can use it for managing all aspects of your Linode account using CLI, we’ll focus today on the creation of Kubernetes clusters.
linode-cli will be your best friend in CI/CD pipelines and automation. For example, you might want to create an on-demand Kubernetes cluster for acceptance testing of your helm charts in the chart’s release pipeline. And of course, you can create a Kubernetes cluster for all the demos on rokpoto.com mentioning Kubernetes and Linode.
Create Kubernetes cluster on Linode using CLI Demo
Let’s now see a demo showing how to create a Kubernetes cluster on Linode using CLI.
You’ll need your own Linode account. Create one and get 100$ credit using this link.
You’ll also need
pip for installing and running linode-cli as it’s basically a python package. In addition, install
kubectl on your local machine for interacting with Linode Kubernetes cluster.
Let’s install linode-cli using pip:
pip install linode-cli
Configure linode-cli to use Linode account
You have 2 options for configuring
linode-cli to use your Linode account.
linode-cliand type enter. You’ll see below output:
Welcome to the Linode CLI. This will walk you through some initial setup. The CLI will use its web-based authentication to log you in. If you prefer to supply a Personal Access Token, use `linode-cli configure --token`. Press enter to continue. This will open a browser and proceed with authentication.
enter and login to Linode if you are not logged in already. Follow the instructions in the command line for configuring the defaults for the CLI. You may also click
enter to skip configuring defaults. The configuration is stored at
~/.config/linode-cli. Edit it or run
linode-cli configure to set the defaults again anytime.
2. Alternatively, you may also generate and copy your Linode personal access token from your account and then run
linode-cli configure --token to use it.
Create Kubernetes cluster on Linode
Let’s now create managed Kubernetes cluster on Linode:
linode-cli lke cluster-create --label cluster12345 --region us-central --k8s_version 1.25 --node_pools.type g6-standard-4 --node_pools.count 1 --format id --text --no-headers
It will return immediately with the id of the cluster, while the creation takes place in the background.
The command is self-explaining. I created the cluster of the specific version in a specific region. The cluster will run on a specified number of Linodes (VMs in Linode language) of the specific type.
You may use
linode-cli linodes types command to find out the supported node types:
linode-cli regions ls will show you Linode regions.
Use Kubernetes cluster on Linode
Kubernetes cluster creation on Linode usually lasts several minutes. After the cluster’s successful creation, let’s download its
linode-cli lke kubeconfig-view [cluster_id] --text --no-headers | base64 -d > /tmp/test-config.yaml
Above command downloads
kubeconfig in base64 encoding, decodes it and saves it to
You can merge this to your
~/.kube/config or use it directly in
Let’s install RabbitMQ using helm using the same commands we used when I showed Kubernetes StatefulSets Demo:
helm repo add bitnami https://charts.bitnami.com/bitnami helm repo update helm install --kubeconfig /tmp/test-config.yaml rabbitmq -n rabbitmq --create-namespace bitnami/rabbitmq --set service.type=LoadBalancer --wait --debug
Note the explicit
--kubeconfig usage and
--debug flag which shows the progress of the chart’s installation. In addition,
--wait flag will wait till the successful chart’s installation within the default timeout of 5 minutes or declare its status as failed.
After chart’s installation completion, inspect the resources in
rabbitmq namespace using
kubectl --kubeconfig /tmp/test-config.yaml get all -n rabbitmq NAME READY STATUS RESTARTS AGE pod/rabbitmq-0 1/1 Running 0 15m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/rabbitmq LoadBalancer 10.128.191.88 220.127.116.11 5672:31506/TCP,4369:31335/TCP,25672:32544/TCP,15672:32242/TCP 15m service/rabbitmq-headless ClusterIP None <none> 4369/TCP,5672/TCP,25672/TCP,15672/TCP 15m NAME READY AGE statefulset.apps/rabbitmq 1/1 15m
Delete Linode Kubernetes cluster and clean up CSI volumes
To delete the cluster along with its resources (Linode) run
linode-cli lke cluster-delete [cluster_id].
It’s important to note though that if the chart requested some storage using PVCs, CSI volumes were dynamically provisioned by Linode using its default storage class. Be aware that these volumes are not deleted after cluster deletion. You’ll have to delete them separately, e.g. using
linode-cli 🙂 Use
linode-cli volumes rm [volume_id] command to achieve that.
That’s it about the creation of a Kubernetes cluster on Linode using CLI. It’s cool that we used CLI only throughout the demo. As always, feel free to share.
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