Simple-CNI

The simplest CNI made in Shell Scripting

Number	Name	Email
98678	Bruno Freitas	mailto:bruno.freitas@tecnico.ulisboa.pt

Project Structure

The folder structure of this project is as follows:

|- install-cni.sh
|- install.sh
|- uninstall.sh
\- cni
    |- simple-cni
    \- simple-cni.conf

At the root there is the install-cni.sh script to install the CNI in each node. Basically, it copies the necessary files to each machine and execute the install.sh script.
The install.sh script is the local installation on the node. It is responsible to do the basic configuration of the CNI.
The uninstall.sh script is to uninstall the CNI. By executing this script on each file, all the CNI resources are deleted.
The cni folder contains the CNI binary and a CNI configuration file example. Inside of this folder there is:
- The simple-cni CNI binary (in thi case, a shell script).
- The simple-cni.conf CNI configuration file.

a. Each K8s node has installed the 'rsync' tool. Do it by running:

apt-get install -y rsync

b. Each K8s node has installed the 'jq' tool. Do it by running:

apt-get install -y jq

c. Each K8s node has ssh keys. Do it by running:

ssh-keygen -t rsa -b 4096

d. Enable SSH access for the root user account. Do it by running:

echo "PermitRootLogin yes" >> /etc/ssh/sshd_config && systemctl restart sshd

e. Enable passwordless SSH for each K8s note. Do it by running:

ssh-copy-id -i /root/.ssh/id_rsa.pub <user>@<K8s-node>

To install this CNI run the following commands on root:

chmod +x install-cni.sh

./install-cni.sh