Setup Kubernetes 1.20.13 on openSUSE Leap 15.4

Setup Kubernetes 1.20.13 on openSUSE Leap 15.4

Nothing to do in the holiday, and want to try the Kubernetes in SUSE. The most important reason is I buy a new Parallels Desktop and have a powerful computer:)

environment

OS: openSUSE Leap 15.4

kubernetes: 1.20.13

virtualization: Parallels Desktop 18 for Mac Pro Edition

setup the virtual machines

create 2 virtual machines of (aarch64) openSUSE Leap 15.4, one is for the master node, the other is for the worker node. the 2 virtual machines are connected under the 'Shared' model in Parallels Desktop.

10.211.55.7    LZY-SUSE154-001
10.211.55.8    LZY-SUSE154-002

during the setup of the virtual machines, ensure swap partition is not created.

add IP, full-hostname and short-hostname into etc\hosts, ==not understand why need do this actually==.

10.211.55.7    LZY-SUSE154-001    master
10.211.55.8    LZY-SUSE154-002    node1

preflight in both virtual machines

sudo zypper update
sudo zypper refresh

#ensure the swap is disable
sudo swapon --show 

install docker, kubelet, kubeadm and kubectl in both virtual machines

sudo zypper install docker

#enable the docker service started on boot
sudo systemctl enable docker
sudo systemctl start docker

sudo docker ps

sudo zypper install kubernetes1.20-kubelet
sudo zypper install kubernetes1.20-kubeadm
sudo zypper install kubernetes1.20-client

#enable the kubelet service started on boot
sudo systemctl enable kubelet

setup the firewall rules in both virtual machines

sudo firewall-cmd --query-port=6443/tcp

#add port in the firewall rules
sudo firewall-cmd --permanent --zone=public --add-port=6443/tcp

sudo systemctl reload firewalld

do in master node, initialize the cluster with kubeadm

initialize the cluster

sudo kubeadm init --kubernetes-version=1.20.13 \
    --apiserver-advertise-address=10.211.55.7 \
    --image-repository registry.aliyuncs.com/google_containers \
    --service-cidr=172.17.0.0/16 \
    --pod-network-cidr=172.18.0.0/16

make kubectl work for the non-root user

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

install a Pod network add-on

sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

if https://raw.githubusercontent.com is blocked, just get the yaml file and copy/pates into vi

sudo vi kube-flannel.yml
sudo kubectl apply -f  kube-flannel.yml

change the IP range of service-cidr

net-conf.json: |
{
    "Network": "172.17.0.0/16",
    "Backend": {
        "Type": "vxlan"
    }
}

check the status, all pods should be in running status

sudo kubectl get pods --all-namespaces

do in worker node, add the worker node into the cluster with kubeadm

specify the container runtime in --cri-socket, Kubernetes uses the Container Runtime Interface (CRI) to interface with your chosen container runtime, if it's using Docker Engine, then set --cri-socket=/var/run/dockershim.sock

sudo kubeadm join 10.211.55.7:6443 --cri-socket=/var/run/dockershim.sock \
    --token <your token> \
    --discovery-token-ca-cert-hash sha256:<your hash>

check status in master node

sudo kubectl get nodes

references

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm
https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm
https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/troubleshooting-kubeadm
https://www.cnblogs.com/yg0070/articles/13848084.html
https://nugi.abdiansyah.com/how-to-kubernetes-in-opensuse-leap-15-1-hardest-way