Ubuntu 24.04
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Kubernetes : Configure Manager Node2024/06/07
 

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] Configure Manager Node first.
root@ctrl:~#
apt -y install nginx libnginx-mod-stream
root@ctrl:~#
vi /etc/nginx/nginx.conf 
# add to last line : proxy settings
stream {
    upstream k8s-api {
        server 10.0.0.30:6443;
    }
    server {
        listen 6443;
        proxy_pass k8s-api;
    }
}
# disable default site on Nginx

root@ctrl:~#
unlink /etc/nginx/sites-enabled/default

root@ctrl:~#
systemctl restart nginx
[2] On Manager Node, Install Kubernetes client.
root@ctrl:~#
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

root@ctrl:~#
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
root@ctrl:~#
apt update

root@ctrl:~#
apt -y install kubectl
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