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.
Download and install cfssl and cfssljson from the cfssl repository:
If you are using ARM64, you may have to use your workstation/mac to create certificate as cfssl only support AMD64 based architecture.
OS X
brew install cfssl
Linux
Get the latest release from below link
https://github.com/cloudflare/cfssl/releases
Verification
Verify cfssl version 1.6.0 or higher is installed:
cfssl version
output
Version: 1.6.1
Runtime: go1.17.2
The cfssljson command line utility does not provide a way to print its version.
Install kubectl
The kubectl command line utility is used to interact with the Kubernetes API Server. Download and install kubectl from the official release binaries:
OS X
brew install kubectl
or
curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.22.3/bin/darwin/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Linux
wget https://storage.googleapis.com/kubernetes-release/release/v1.22.3/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Verification
Verify kubectl version v1.22.3 or higher is installed:
kubectl version --client