First identify a system from where you will perform administrative tasks, such as creating certificates, kubeconfig files and distributing them to the different VMs.
If you are on a Linux laptop, then your laptop could be this system. In my case I chose the master-1 node to perform administrative tasks. Whichever system you chose make sure that system is able to access all the provisioned VMs through SSH to copy files over.
Generate Key Pair on master-1 node
$ssh-keygen
Leave all settings to default.
View the generated public key ID at:
$cat .ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQD......8+08b vagrant@master-1
Move public key of master to all other VMs
$cat >> ~/.ssh/authorized_keys <<EOF
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQD......8+08b vagrant@master-1
EOF
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/v1.13.0/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin/
Verify kubectl version 1.13.0 or higher is installed:
kubectl version --client
output
Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.0", GitCommit:"ddf47ac13c1a9483ea035a79cd7c10005ff21a6d", GitTreeState:"clean", BuildDate:"2018-12-03T21:04:45Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"}
Next: Certificate Authority