Delegatio

Delegatio is a framework that can be used to manage homework of classes (i.e. system security). The aim is to provide a infrastructure to let students work on problems independent of their hardware.

Installation

pacman -S libvirt qemu-full go mkosi make cmake

systemd 253 or newer is required to build the images, otherwise a local systemd tree is needed mkosi issue

Build

mkdir build
cd build
cmake ..
make

Run

Before we start the program we have create a kubernetes persistent storage. The easiest way to do that is through NFS. First create a shared dir and make is user accessible.

sudo mkdir /mnt/myshareddir
sudo chmod 777 /mnt/myshareddir

Secondly configure the shared folder in /etc/exports start the nfs.service and update the exported foler list

echo "/mnt/myshareddir *(rw,sync,no_subtree_check,no_root_squash,fsid=0)" | sudo tee -a /etc/exports
sudo systemctl enable --now nfsv4-server.service
sudo exportfs -arv

Lastly, you can run the cli

./cli --path=../images/image.qcow2

By default the ssh image will be pulled from Github, and deployed in Kubernetes. For testing you can also start the ssh binary locally with an exported kubeconfig export KUBECONFIG=/path/to/admin.conf.

Connecting is possible by sshing into the daemon, either on the kubernetes nodes or on localhost.

ssh testchallenge2@localhost -p 2200 -i ~/.ssh/id_rsa

You must provide your public keys in ./internal/config/global.go (will be changed to read a config file soon)

Limitations

Currently we only support one ControlPlane, thus we only have one KubeAPIServer. It might be possible that under high load (many port forward requests) the container is not capable of handing everything. However, we need to test it with some 100 users.

TODO

• Unittests
• Abstract storage
• Webserver to deploy a website to generate ssh keys and sync them with the ssh daemon
• Support for multiple control planes
• Harden Kubernetes Pods

Toubleshoot

firewall_backend = "iptables" in /etc/libvirt/network.conf