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02-client-tools.md

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Installing the Client Tools

In this lab you will install the command line utilities required to complete this tutorial: cfssl, cfssljson, and kubectl.

Install CFSSL

The cfssl and cfssljson command line utilities will be used to provision a PKI Infrastructure and generate TLS certificates.

On the gateway-01 VM, download and install cfssl and cfssljson:

wget -q --show-progress --https-only --timestamping \
  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/linux/cfssl \
  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/linux/cfssljson
chmod +x cfssl cfssljson
sudo mv cfssl cfssljson /usr/local/bin/

Verification

Verify cfssl and cfssljson version 1.3.4 or higher is installed:

cfssl version

Output:

Version: 1.3.4
Revision: dev
Runtime: go1.13
cfssljson --version

Output:

Version: 1.3.4
Revision: dev
Runtime: go1.13

Install kubectl

The kubectl command line utility is used to interact with the Kubernetes API Server. On the gateway-01 VM, download and install kubectl from the official release binaries:

wget https://storage.googleapis.com/kubernetes-release/release/v1.21.5/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/

Verification install

Verify kubectl version 1.15.3 or higher is installed:

kubectl version --client

Output:

Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.21.5", GitCommit:"c96aede7b5205121079932896c4ad89bb93260af", GitTreeState:"clean", BuildDate:"2020-06-17T11:41:22Z", GoVersion:"go1.16.5", Compiler:"gc", Platform:"linux/amd64"}

Next: Provisioning Compute Resources