To start using your cluster, you need to run the following as a regular user: Output: Your Kubernetes control-plane has initialized successfully! Next initialize the master node using kubeadm. Restart the kubelet service sudo systemctl restart kubelet Initialize the Master node using kubeadm (on Master Node) Reload the daemon sudo systemctl daemon-reload
Kubeadm centos minimal install#
sudo apt-get install -y kubelet kubeadm kubectl sudo apt-mark hold kubelet kubeadm kubectl Configure cggroup driverĪdd the cggroup driver in kubelet sudo sed -i "s/cgroup-driver=systemd/cgroup-driver=cgroupfs/g" /etc/systemd/system//nf Install kubeadm,kubelet and kubectl using below command. sudo apt-add-repository "deb kubernetes-xenial main" Install Kubeadm,Kubelet and Kubectl on All Node curl -s | sudo apt-key add - Add Kubernetes APT Repository on All nodeĪdd Kubernetes apt repository on all node for Ubuntu.
Install curl on master node if not installed sudo apt-get install curl Add Kubernetes GPG Key on All nodeĪdd Kubernetes GPG key in all node. Install HTTPS support package on all node sudo apt-get install -y apt-transport-https Install CURL on All node Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get dial unix /var/run/docker.sock: connect: permission deniedĪdd the docker user in group and give permission for docker.sock sudo usermod -aG docker $USERĬhange the docker.sock permission sudo chmod 666 /var/run/docker.sock Start the Docker service if not started sudo systemctl enable rvice To check the docker service status sudo systemctl status rvice Enable Docker service at startup sudo systemctl enable rvice Install HTTPS Support on All node You can install docker by script as shown below curl -fsSL -o get-docker.sh Install docker on both master and worker node sudo apt-get install -y docker.io
Kubeadm centos minimal update#
Update the system Packages sudo apt-get update Install Docker on All node Reboot the system to take effect sudo reboot Start by editing the below file: sudo nano /etc/fstab 2 or 3 Ubuntu 18.04/16.04 LTS System with Minimal Installationįirewall Ports/Inbound Traffic Ports for Kubernetes Cluster Control-plane node(s) ProtocolĪlso comment out the reference to swap in /etc/fstab.It provides runtime environment for application.
With the help of pod we can deploy one or more container. Pod is scheduling unit in Kubernetes, it consists of one or more container. It is core Networking component of Kubernetes cluster, it is responsible for entire network configuration, it maintains distributed network across all containers, pods and nodes. Kubelet is primary agent which runs on each worker node.It ensures containers are running in pod. Worker node can be any Physical Server or Virtual Machine where containers are deployed, containers can be docker,rocket.etc. ETCDĮtcd is light weight key-value database, it stores information like about current state of cluster.etc. It is responsible overall health of entire cluster such as no of nodes insides the cluster, up and running status as per specification. Scheduler is responsible for physically scheduling pods across multiple nodes, depending upon when we submit requirement to API server, scheduler schedules pod accordingly. API objects can be pods,containers,deployments,services.etc. It is used to create,delete and update any object inside the cluster using kubectl command. Kubernetes master is responsible for managing entire cluster, it coordinates all the activities inside the cluster and communicates with worker node.There are four major components on master node. Genrally Kubernetes cluster includes one master node and many worker nodes also we can use more than one master node. To know more about kubeadm commands,visit official Kubernetes site. Kubeadm version: It used to check kubeadm version. Kubeadm token: It is used to genrate token. Kubeadm join(on worker node): It is used to initialize and configure any node as worker node.
Kubeadm init(on master node) : It is used to initialize and configure any node as a master node. We are going to use below kubeadm commands while configuring Kubernetes cluster. Kubeadm helps for installing and configuring Kubernetes cluster using command line. It is used to automatic cluster deployment, scaling and manage containerized applications. Kubernetes is one of the Leading open source Container Orchestration Engine.
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