In RHEL 7 /CentOS 7, set -nf-call-iptables to 1 in your sysctl config. Sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config Kernel Settings Kube-proxy: It is a Kubernetes network proxy that forwards TCP/UDP incoming requests to backend container.Ĭontainer Runtime: It is container software (Docker) Environment NodeįirwallD: firewall-cmd -permanent -add-port=6443/tcpįirewall-cmd -permanent -add-port=2379-2380/tcpįirewall-cmd -permanent -add-port=10250/tcpįirewall-cmd -permanent -add-port=10251/tcpįirewall-cmd -permanent -add-port=10252/tcpįirewall-cmd -permanent -add-port=10255/tcpįirwallD: firewall-cmd -permanent -add-port=10251/tcpĬonsider disabling SELinux on CentOS 7 / RHEL 7 nodes. Kubelet: It runs on all worker nodes and handles tasks like starting pods and containers. Kube-controller-manager: It is a control manager that runs on the manager who is responsible for monitoring nodes and maintaining pods replication.Ĭloud-controller-manager: A cloud control manager that interact with underlying cloud providers (Ex: DigitalOcean, Rancher, etc.). Kube-scheduler: It is a scheduler that runs on the master node which monitors newly created pods and runs those pods on select nodes depends on resource availability. Kube-API server: It is an API server, runs on the master node that exposes Kubernetes APIĮtcd: A key store that stores Kubenetes cluster data In this multi-node setup, we will have one master node and multiple worker nodes (minions). Here, we will deploy a multi-node Kubernetes cluster using the kubeadm. Kubeadm-dind (Kuberadm) – A multi-node Kubernetes cluster MinKube – A single node Kubernetes cluster for development and testing.Ģ. We can run Kubernetes in local-machine using below methods,ġ. With Kubernetes, you can deploy any number of container replicas onto a node cluster, and Kubernetes will handle remainings (where to bring up containers) for you. You can call Kubernetes is a cluster manager for Docker, and it provides almost same functionalities that of Docker Swarm. Google initially designed Kubernetes and now maintained by the Cloud Native Computing Foundation. Kubernetes is an open-source Production-Grade container orchestration tool that helps to automate deploying, scaling, managing containerized applications.

Install docker on rhel 7