4.1 KiB
Installing the Client Tools
In this lab you will install the command line utilities required to complete this tutorial: jq, cfssl, cfssljson, kubectl, and set up a few shell functions.
Install jq
Install jq:
OS X
curl -o jq -L https://github.com/stedolan/jq/releases/download/jq-1.6/jq-osx-amd64
chmod +x jq
sudo mv jq /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 jq
Linux
curl -o jq -L https://github.com/stedolan/jq/releases/download/jq-1.6/jq-linux64
chmod +x jq
sudo mv jq /usr/local/bin/
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:
OS X
curl -o cfssl https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/darwin/cfssl
curl -o cfssljson https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/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
Linux
wget -q --show-progress --https-only --timestamping \
https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssl \
https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssljson
chmod +x cfssl cfssljson
sudo mv cfssl cfssljson /usr/local/bin/
Verification
Verify cfssl and cfssljson version 1.4.1 or higher is installed:
cfssl version
output
Version: 1.4.1
Runtime: go1.12.12
cfssljson --version
Version: 1.4.1
Runtime: go1.12.12
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/v1.18.6/bin/darwin/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Linux
wget https://storage.googleapis.com/kubernetes-release/release/v1.18.6/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Verification
Verify kubectl version 1.18.6 or higher is installed:
kubectl version --client
output
Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:58:53Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
Shell Helper Functions
In your terminal, run the following to define a few shell helper functions that we'll use throughout the tutorial:
function oci-ssh(){
# Helper function to ssh into a named OCI compute instance
if [ -z "$1" ]
then
echo "Usage: oci-ssh <compute_instance_name> <optional_command>"
else
ocid=$(oci compute instance list --lifecycle-state RUNNING --display-name $1 | jq -r .data[0].id)
ip=$(oci compute instance list-vnics --instance-id $ocid | jq -r '.data[0]["public-ip"]')
ssh -i kubernetes_ssh_rsa ubuntu@$ip $2
fi
}
function oci-scp(){
# Helper function to scp a set of local files to a named OCI compute instance
if [ -z "$3" ]
then
echo "Usage: oci-scp <local_file_list> <compute_instance_name> <destination>"
else
ocid=$(oci compute instance list --lifecycle-state RUNNING --display-name ${@: (-2):1} | jq -r .data[0].id)
ip=$(oci compute instance list-vnics --instance-id $ocid | jq -r '.data[0]["public-ip"]')
scp -i kubernetes_ssh_rsa "${@:1:$#-2}" ubuntu@$ip:${@: -1}
fi
}