Update Sunlife_Notes

Author: onlineTrainingguy

Sunlife_Notes

@@ -431,3 +431,48 @@ docker-compose down
 9.	Start container and now you should be able to access the apache website. docker start c1
 10.	Remove  webserver container docker rm -f c1
 
+----------------------------------------Kubernetes------------------
+---------Instalation
+--------------on Centos on all master and client machine
+cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
+[kubernetes]
+name=Kubernetes
+baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
+enabled=1
+gpgcheck=1
+repo_gpgcheck=1
+gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg \
+   https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
+exclude=kubelet kubeadm kubectl
+EOF
+ 
+# Set SELinux in permissive mode (effectively disabling it)
+sudo setenforce 0
+sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
+ 
+sudo yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
+ 
+sudo systemctl enable --now kubelet
+
+---------------Create Master Server
+On master machine run the below command
+
+ 
+
+1.  kubeadm init --apiserver-advertise-address=<<Master ServerIP>> --pod-network-cidr=192.168.0.0/16
+
+ 
+
+2.  mkdir -p $HOME/.kube
+
+3.  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+
+4.  sudo chown $(id -u):$(id -g) $HOME/.kube/config
+
+Calico yaml file is to be applied
+
+5.  Run the join command on each of the worker node which you want to join in the cluser.
+
+ kubectl apply -f https://docs.projectcalico.org/v3.8/manifests/calico.yaml
+
+7.  Run kubectl get nodes command on master node