Installing the Client Tools

• Install CFSSL
  • OS X
  • Linux
  • Verification
• Install kubectl
  • OS X
  • Linux
  • Verification

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:

OS X

curl -o cfssl https://pkg.cfssl.org/R1.2/cfssl_darwin-amd64
curl -o cfssljson https://pkg.cfssl.org/R1.2/cfssljson_darwin-amd64

chmod +x cfssl cfssljson

sudo mv cfssl cfssljson /usr/local/bin/

Some OS X users may experience problems using the pre-built binaries in which case Homebrew might be a better option:

brew install cfssl

Linux

wget -q --show-progress --https-only --timestamping \
  https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 \
  https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

chmod +x cfssl_linux-amd64 cfssljson_linux-amd64

sudo mv cfssl_linux-amd64 /usr/local/bin/cfssl

sudo mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

Verification

Verify cfssl version 1.2.0 or higher is installed:

cfssl version

output

Version: 1.2.0
Revision: dev
Runtime: go1.6

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

curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/darwin/amd64/kubectl

chmod +x kubectl

sudo mv kubectl /usr/local/bin/

Linux

wget https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kubectl

chmod +x kubectl

sudo mv kubectl /usr/local/bin/

Verification

Verify kubectl version 1.12.0 or higher is installed:

kubectl version --client

output

Client Version: version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.0", GitCommit:"0ed33881dc4355495f623c6f22e7dd0b7632b7c0", GitTreeState:"clean", BuildDate:"2018-09-27T17:05:32Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}