Install kubernetes official way¶
Docs:
- https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
- https://www.webhi.com/how-to/setup-configure-kubernetes-on-ubuntu-debian-and-centos-rhel/
- https://serverfault.com/a/1118760
Disable swap¶
Kubernetes performs best when swap is disabled. Disable it with the following commands:
the swap patition will be unused, you may want to reclaim it and merge it to the root patition
# extend disk
sudo cfdisk /dev/sda
# check
lsblk
lsblk --fs
df -h
# resize fs
resize2fs /dev/sda1
# check again
Install containerd (by docker engine)¶
# Set up Docker's apt repository. (https://docs.docker.com/engine/install/debian/)
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
# Add the repository to Apt sources:
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
# install containerd.io
sudo apt-get install containerd.io
# Create containerd configuration
sudo mkdir -p /etc/containerd
sudo containerd config default | sudo tee /etc/containerd/config.toml
sudo nano /etc/containerd/config.toml # set SystemdCgroup = true
sudo systemctl restart containerd
Install Kubernetes Components¶
sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl gpg
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list # for other Kubernetes minor versions, you need to change the Kubernetes minor version in the URL to match your desired minor version
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
# fix kubeadm init preflight issues
sudo modprobe br_netfilter
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
EOF
sudo sysctl --system
# init cluster
sudo kubeadm init --pod-network-cidr=10.244.0.0/16
# post initialization
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Configure Pod Network¶
Select a Pod network add-on and install it. For instance, you can choose to install Calico:
or Flannelkubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/v0.20.2/Documentation/kube-flannel.yml
Verify¶
All should be running now:
Join worker nodes (if there are)¶
After step "fix kubeadm init preflight issues", instead of running "kubeadm init", we run: (this command should be printed out after master node kubeadm init)