How to use the command "doctl kubernetes options" (with examples)

The doctl kubernetes options command provides a way to retrieve information about available options for working with Kubernetes clusters in DigitalOcean. It allows you to list regions, machine sizes, and Kubernetes versions that can be used with DigitalOcean clusters.

Use case 1: Listing regions that support Kubernetes clusters

Code:

doctl kubernetes options regions

Motivation: You might want to know which regions are available for creating a Kubernetes cluster in DigitalOcean. This command allows you to quickly see the list of regions where Kubernetes clusters can be created.

Explanation: The doctl kubernetes options regions command lists all the available regions where Kubernetes clusters can be created in DigitalOcean. Each region represents a specific geographical location where the clusters can be provisioned.

Example output:

Slug      Name
ams2      Amsterdam 2
ams3      Amsterdam 3
blr1      Bangalore 1
...

The output includes the region slug and the corresponding region name.

Use case 2: Listing machine sizes that can be used in a Kubernetes cluster

Code:

doctl kubernetes options sizes

Motivation: When creating a Kubernetes cluster in DigitalOcean, you need to select the appropriate machine size for your cluster nodes. This command helps you to see the available machine sizes and choose the one that suits your requirements.

Explanation: The doctl kubernetes options sizes command provides a list of machine sizes that can be used in a Kubernetes cluster. Machine sizes, also known as droplet sizes, represent the CPU, Memory, and Storage configurations available for the cluster nodes.

Example output:

Slug        Memory    VCPUs   Disk    Cost Per Hour
s-1vcpu-2gb  2048      1       25      0.00744
s-3vcpu-1gb  1024      3       25      0.01488
s-2vcpu-2gb  2048      2       50      0.01488
...

The output includes the droplet slug, memory size, number of virtual CPUs (VCPUs), disk size in gigabytes (GB), and the cost per hour for each machine size.

Use case 3: Listing Kubernetes versions that can be used with DigitalOcean clusters

Code:

doctl kubernetes options versions

Motivation: It is important to know the available Kubernetes versions when creating or upgrading a Kubernetes cluster in DigitalOcean. This command allows you to view the list of supported versions and choose the appropriate one for your cluster.

Explanation: The doctl kubernetes options versions command lists the Kubernetes versions that can be used with DigitalOcean clusters. It shows the available Kubernetes versions that you can specify when creating or upgrading a cluster.

Example output:

Slug        Kubernetes Version   Default
1.14.10-do  1.14.10              true
1.13.12-do  1.13.12              false
1.12.10-do  1.12.10              false
...

The output includes the version slug, the corresponding Kubernetes version, and whether the version is the default.

Conclusion:

The doctl kubernetes options command is a helpful tool for obtaining information about available options for working with Kubernetes clusters in DigitalOcean. It allows you to list regions, machine sizes, and Kubernetes versions, aiding in the creation and configuration of your clusters.