Kubernetes : Install Kubeadm2026/05/12

Configure Multi Nodes Kubernetes Cluster.

This example is based on the environment like follows.

For System requirements, each Node has unique Hostname, MAC address, Product_uuid.
MAC address and Product_uuid are generally already unique one if you installed OS on physical machine or virtual machine with common procedure.
You can see Product_uuid with the command [dmidecode -s system-uuid].

+----------------------+   +----------------------+
|  [ ctrl.srv.world ]  |   |   [ dlp.srv.world ]  |
|     Manager Node     |   |     Control Plane    |
+-----------+----------+   +-----------+----------+
        eth0|10.0.0.25             eth0|10.0.0.30
            |                          |
------------+--------------------------+-----------
            |                          |
        eth0|10.0.0.51             eth0|10.0.0.52
+-----------+----------+   +-----------+----------+
| [ node01.srv.world ] |   | [ node02.srv.world ] |
|     Worker Node#1    |   |     Worker Node#2    |
+----------------------+   +----------------------+

[1]	On all Kubernetes Cluster Nodes except Manager Node, Change settings for System requirements.

root@dlp:~#

apt -y install containerd curl gpg

root@dlp:~#

mkdir /etc/containerd

root@dlp:~#

containerd config default | tee /etc/containerd/config.toml

root@dlp:~#

vi /etc/containerd/config.toml

# line 51 : change
sandbox = 'registry.k8s.io/pause:3.10.1'

# line 109 : change
SystemdCgroup = true

root@dlp:~#

systemctl restart containerd.service

root@dlp:~#

cat > /etc/sysctl.d/99-k8s-cri.conf <<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
EOF

root@dlp:~#

sysctl --system

# disable ufw and swap

root@dlp:~#

ufw disable

root@dlp:~#

swapoff -a

root@dlp:~#

vi /etc/fstab

# comment out
#/swap.img      none    swap    sw      0       0

[2]	On all Kubernetes Cluster Nodes except Manager Node, Install required packages.

root@dlp:~#

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.36/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

root@dlp:~#

echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.36/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list

root@dlp:~#

apt update

root@dlp:~#

apt -y install kubeadm kubelet kubectl

root@dlp:~#

ln -s /opt/cni/bin /usr/lib/cni

Matched Content