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‎Kubernetese/Readme.md‎

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Install Kubernetes on Ubuntu 18.04 LTS
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Step1: On All Machines ( Master & All nodes ):
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### INSTALL DOCKER
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sudo apt-get update
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sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
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curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
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sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
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sudo apt-get update ; clear
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sudo apt-get install -y docker-ce
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sudo vi /etc/docker/daemon.json
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{
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"exec-opts": ["native.cgroupdriver=systemd"]
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}
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sudo service docker restart
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### INSTALL KUBEADM,KUBELET,KUBECTL
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echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
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curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
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sudo apt-get update ; clear
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sudo apt-get install -y kubelet kubeadm kubectl
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Step2: On Master only:
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sudo kubeadm init --ignore-preflight-errors=all
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sudo mkdir -p $HOME/.kube
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sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
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sudo chown $(id -u):$(id -g) $HOME/.kube/config
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## Weave
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kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
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kubectl get nodes
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kubectl get all --all-namespaces
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Step3: On Nodes only:
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copy the kubeadm join token from master & run it on all nodes
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Ex: kubeadm join 10.128.15.231:6443 --token mks3y2.v03tyyru0gy12mbt \
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--discovery-token-ca-cert-hash sha256:3de23d42c7002be0893339fbe558ee75e14399e11f22e3f0b34351077b7c4b56
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Install Kubernetes on CENTOS
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Step1: On All Machines ( Master & All nodes ):
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### Set SELinux in permissive mode (effectively disabling it)
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setenforce 0
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sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
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### Install Docker
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sudo yum remove -y docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine docker-ce docker-ce-cli containerd.io
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sudo yum install -y yum-utils device-mapper-persistent-data lvm2
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sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
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sudo yum install -y docker-ce docker-ce-cli containerd.io
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systemctl enable --now docker
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systemctl start docker
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### Install kubeadm,kubelet,kubectl
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cat <<EOF > /etc/yum.repos.d/kubernetes.repo
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[kubernetes]
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name=Kubernetes
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baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
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enabled=1
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gpgcheck=1
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repo_gpgcheck=1
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gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
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EOF
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yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
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systemctl enable --now kubelet
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Step2: On Master only:
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sudo kubeadm init --ignore-preflight-errors=all
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sudo mkdir -p $HOME/.kube
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sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
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sudo chown $(id -u):$(id -g) $HOME/.kube/config
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## Weave Pod Network
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kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
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kubectl get nodes
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kubectl get all --all-namespaces
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Step3: On Nodes only:
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copy the kubeadm join token from master & run it on all nodes
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Ex: kubeadm join 10.128.15.231:6443 --token mks3y2.v03tyyru0gy12mbt \
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--discovery-token-ca-cert-hash sha256:3de23d42c7002be0893339fbe558ee75e14399e11f22e3f0b34351077b7c4b56
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how to find kubeadm join token later
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kubeadm token create --print-join-command --ttl=0

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