In this lab you will install the command line utilities required to complete this tutorial: cfssl, cfssljson, and kubectl.
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:
wget -q --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/
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
Version: 1.3.4
Revision: dev
Runtime: go1.13
The kubectl command line utility is used to interact with the Kubernetes API Server. Download and install kubectl from the official release binaries:
wget https://storage.googleapis.com/kubernetes-release/release/v1.16.2/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Verify kubectl version 1.16.2 or higher is installed:
kubectl version --client
output
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.2", GitCommit:"c97fe5036ef3df2967d086711e6c0c405941e14b", GitTreeState:"clean", BuildDate:"2019-10-15T19:18:23Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"linux/amd64"}