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:
$ curl -o cfssl https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/darwin/cfssl
$ curl -o cfssljson https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/darwin/cfssljson
$ 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
$ 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/
Verify cfssl and cfssljson version 1.3.4 or higher is installed:
$ cfssl version
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:
$ curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/darwin/amd64/kubectl
$ chmod +x kubectl
$ sudo mv kubectl /usr/local/bin/
$ wget https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kubectl
$ chmod +x kubectl
$ sudo mv kubectl /usr/local/bin/
Verify kubectl version 1.15.3 or higher is installed:
$ kubectl version --client
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-13T11:51:44Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"darwin/amd64"}