muni devops:
Kubernetes Setup Using Kubeadm In AWS EC2 Ubuntu Servers -
Prerequisite:
3 - Ubuntu Serves
1 - Manager (4GB RAM , 2 Core) t2.medium
2 - Workers (1 GB, 1 Core) t2.micro
Note: Open Required Ports In AWS Security Groups. For now we will open All trafic.
==========COMMON FOR MASTER & SLAVES START ====
First, login as ‘root’ user because the following set of commands need to be executed with ‘sudo’ permissions.
sudo su -
Install Required packages and apt keys.
apt-get update -y
apt-get install -y apt-transport-https
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update -y
#Turn Off Swap Space
swapoff -a
sed -i ‘/ swap / s/^(.*)$/#\1/g’ /etc/fstab
Install And Enable Docker
apt install http://docker.io|docker.io -y
usermod -aG docker ubuntu
systemctl restart docker
systemctl enable docker.service
#Install kubeadm, Kubelet And Kubectl
apt-get install -y kubelet kubeadm kubectl kubernetes-cni
Enable and start kubelet service
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet.service
==========COMMON FOR MASTER & SLAVES END=====
===========In Master Node Start====================
Steps Only For Kubernetes Master
Switch to the root user.
sudo su -
Initialize Kubernates master by executing below commond.
kubeadm init
#exit root user & exeucte as normal user
exit
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
To verify, if kubectl is working or not, run the following command.
kubectl get pods -o wide --all-namespaces
#You will notice from the previous command, that all the pods are running except one: ‘kube-dns’. For resolving this we will install a # pod network. To install the weave pod network, run the following command:
kubectl apply -f “https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d ‘\n’)”
kubectl get nodes
kubectl get pods --all-namespaces
Get token
kubeadm token create --print-join-command
=========In Master Node End====================
Add Worker Machines to Kubernates Master
Copy kubeadm join token from and execute in Worker Nodes to join to cluster
kubectl commonds has to be executed in master machine.
Check Nodes
kubectl get nodes
