This explains how to do kubernetes setup in multiple nodes,
1. Master node in one machine.
2. Worker nodes in another machine.
Steps:
Setup all nodes.
The following need to be done for all master and worker nodes.
#### Download gpg key for docker
```shell script
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
```
#### Add docker repository
```shell script
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
```
#### Add gpg key for kubernetes
```shell script
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
```
#### Add kuberentes repository
```shell script
cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
```
---- To fix a defect in k8s 1.13.4
```shell script
sudo apt-get update
sudo apt-get install -y docker-ce=18.06.1~ce~3-0~ubuntu kubelet=1.13.5-00 kubeadm=1.13.5-00 kubectl=1.13.5-00
```
#### Prevent the following packages from automatically upgrading:
- kubelet
- kubeadm
- kubectl
sudo apt-mark hold docker-ce kubelet kubeadm kubectl
#### Enable iptables bridge call:
```shell script
echo "net.bridge.bridge-nf-call-iptables=1" | sudo tee -a /etc/sysctl.conf
sudo sysctl -p
```
## Master node setup
***************************
sudo kubeadm init --pod-network-cidr=10.244.0.0/16
#Setup kubectl
mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
#Install flannel networking
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681ece4de4c0d86c5cd2643275/Documentation/kube-flannel.yml
# On each worker nodes do these..
sudo kubeadm join $controller_private_ip:6443 --token $token --discovery-token-ca-cert-hash $hash
workers would have joined the master.Goto master node and issue the commands to view the nodes.
kubectl get nodes
kubectl get pods --all-namespaces
