Raspberry-Pi-k8s-script

This document refers to open source document opsnull/follow-me-install-kubernetes-cluster, which aims to use shell scripts on the Raspberry Pi, semi-automatically Build a highly available cluster.

Experimental equipment

Raspberry Pi 4 model B

Operating system environment

Ubuntu Server 20.04.2 LTS

Cluster node address planning:

• k8s-01: 192.168.11.30
• k8s-02: 192.168.11.31
• k8s-03: 192.168.11.32

Topology

Version 1 usage

The three devices are both Master nodes and Worker nodes. The following operations are performed on each node.

Set hostname

hostnamectl set-hostname k8s-01 # The host names of different nodes are different, take k8s-01 as an example

If DNS does not support host name resolution, you also need to add the correspondence between host name and IP in the /etc/hosts file of each machine:

cat >> /etc/hosts <<EOF
192.168.11.30 k8s-01
192.168.11.31 k8s-02
192.168.11.32 k8s-03
EOF

Log out and log in to the root account again, and you can see that the host name takes effect.

Add node trust relationship

This operation only needs to be performed on the k8s01 node, and the root account can be set to log in all nodes without a password:

ssh-keygen -t rsa
ssh-copy-id root@k8s-01
ssh-copy-id root@k8s-02
ssh-copy-id root@k8s-03

After performing the above operations, please perform the following operations.

Step 1: Execute the script 1.system_environment.sh on all nodes

Step 2: Execute the following 4 scripts on the k8s-01 node

• 2.basic_setting.sh
• 3.master.sh
• 4.worker.sh
• 5.calico.sh

Note: Before executing these scripts, you need to change the cluster node IP in the script to the actual node IP