| # containerd | |
| cat > /etc/modules-load.d/containerd.conf <<EOF | |
| overlay | |
| br_netfilter | |
| EOF | |
| modprobe overlay | |
| modprobe br_netfilter | |
| # Setup required sysctl params, these persist across reboots. | |
| cat > /etc/sysctl.d/99-kubernetes-cri.conf <<EOF | |
| net.bridge.bridge-nf-call-iptables = 1 | |
| net.ipv4.ip_forward = 1 | |
| net.bridge.bridge-nf-call-ip6tables = 1 | |
| EOF | |
| sysctl --system | |
| # Install containerd | |
| ## Set up the repository | |
| ### Install required packages | |
| yum install -y yum-utils device-mapper-persistent-data lvm2 | |
| ### Add docker repository | |
| yum-config-manager \ | |
| --add-repo \ | |
| https://download.docker.com/linux/centos/docker-ce.repo | |
| ## Install containerd | |
| yum -y update && yum -y install containerd.io | |
| # Configure containerd | |
| mkdir -p /etc/containerd | |
| containerd config default > /etc/containerd/config.toml | |
| # Restart containerd | |
| systemctl restart containerd | |
| # kubelet | |
| cat <<EOF > /etc/yum.repos.d/kubernetes.repo | |
| [kubernetes] | |
| name=Kubernetes | |
| baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 | |
| 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 | |
| EOF | |
| # Set SELinux in permissive mode (effectively disabling it) | |
| setenforce 0 | |
| sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config | |
| yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes | |
| systemctl enable --now kubelet | |
| # crate cluster | |
| kubeadm init --pod-network-cidr=192.168.0.0/16 --cri-socket=/run/containerd/containerd.sock | |
| mkdir -p $HOME/.kube | |
| sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config | |
| sudo chown $(id -u):$(id -g) $HOME/.kube/config | |
| # deploy Calico | |
| kubectl apply -f https://docs.projectcalico.org/v3.8/manifests/calico.yaml |
| [root@containerd-k8s ~]# kubectl get node | |
| NAME STATUS ROLES AGE VERSION | |
| containerd-k8s Ready master 83s v1.17.1 | |
| [root@containerd-k8s ~]# kubectl get pod -n kube-system | |
| NAME READY STATUS RESTARTS AGE | |
| calico-kube-controllers-5c45f5bd9f-j4wks 1/1 Running 0 55s | |
| calico-node-s2s98 1/1 Running 0 54s | |
| coredns-6955765f44-dfdww 1/1 Running 0 72s | |
| coredns-6955765f44-rjm7p 1/1 Running 0 72s | |
| etcd-containerd-k8s 1/1 Running 0 68s | |
| kube-apiserver-containerd-k8s 1/1 Running 0 68s | |
| kube-controller-manager-containerd-k8s 1/1 Running 0 68s | |
| kube-proxy-chztk 1/1 Running 0 72s | |
| kube-scheduler-containerd-k8s 1/1 Running 0 68s |