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mini-lab

The mini-lab is a small, virtual setup to locally run the metal-stack. It deploys the metal control plane and a metal-stack partition with two simulated leaf switches. The lab can be used for trying out metal-stack, demonstration purposes or development.

overview components

This project can also be used as a template for writing your own metal-stack deployments.

Requirements

  • Linux machine with hardware virtualization support
  • kvm as hypervisor for the VMs (you can check through the kvm-ok command)
  • docker >= 18.09 (for using kind and our deployment base image)
  • docker-compose >= 2.0 (for ease of use and for parallelizing control plane and partition deployment)
  • kind == v0.15.0 (for hosting the metal control plane on a kubernetes cluster v1.25)
  • containerlab == v0.25.1
  • the lab creates a docker network on your host machine (172.17.0.1), this hopefully does not overlap with other networks you have
  • (recommended) haveged to have enough random entropy (only needed if the PXE process does not work)

Here is some code that should help you setting up most of the requirements:

# Install kvm
sudo apt install -y git curl qemu qemu-kvm haveged

# Install Docker
curl -fsSL https://get.docker.com | sh
# if you want to be on the safe side, follow the original installation
# instructions at https://docs.docker.com/engine/install/ubuntu/

# Ensure that your user is member of the group "docker"
# you need to login again in order to make this change take effect
sudo usermod -G docker -a ${USER}

# Install containerlab
bash -c "$(curl -sL https://get-clab.srlinux.dev)"

# Install kind (kubernetes in docker), for more details see https://kind.sigs.k8s.io/docs/user/quick-start/#installation
sudo curl -Lo /usr/local/bin/kind "https://kind.sigs.k8s.io/dl/latest/kind-linux-amd64"
sudo chmod +x /usr/local/bin/kind

# Install docker-compose, for more details see https://docs.docker.com/compose/install/
sudo curl -Lo /usr/local/bin/docker-compose "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)"
sudo chmod +x /usr/local/bin/docker-compose

The following ports are used statically on your host machine:

Port Bind Address Description
6443 0.0.0.0 kube-apiserver of the kind cluster
4443 0.0.0.0 HTTPS ingress
4150 0.0.0.0 nsqd
4161 0.0.0.0 nsq-lookupd
8080 0.0.0.0 HTTP ingress

Known Limitations

  • to keep the demo small there is no EVPN
  • machine restart and destroy does not work because we cannot change the boot order via IPMI in the lab easily (virtual-bmc could, but it's buggy)
  • login to the machines is possible with virsh console, login to the firewall is possible with SSH from your local machine

Try it out

git clone https://github.com/metal-stack/mini-lab.git
cd mini-lab

Start the mini-lab with a kind cluster, a metal-api instance as well as two containers wrapping leaf switches and another container that hosts two user-allocatable machines:

make
# containerlab will ask you for root permissions (https://github.com/srl-labs/containerlab/issues/669)

After the deployment and waiting for a short amoung of time, two machines in status PXE booting become visible through metalctl machine ls:

docker-compose run metalctl machine ls

ID                                          LAST EVENT   WHEN     AGE  HOSTNAME  PROJECT  SIZE          IMAGE  PARTITION
e0ab02d2-27cd-5a5e-8efc-080ba80cf258        PXE Booting  3s
2294c949-88f6-5390-8154-fa53d93a3313        PXE Booting  5s

Wait until the machines reach the waiting state:

docker-compose run metalctl machine ls

ID                                          LAST EVENT   WHEN     AGE  HOSTNAME  PROJECT  SIZE          IMAGE  PARTITION
e0ab02d2-27cd-5a5e-8efc-080ba80cf258        Waiting      8s                               v1-small-x86         mini-lab
2294c949-88f6-5390-8154-fa53d93a3313        Waiting      8s                               v1-small-x86         mini-lab

Create a firewall and a machine with:

make firewall
make machine

Alternatively, you may want to issue the metalctl commands on your own:

docker-compose run metalctl network allocate \
        --partition mini-lab \
        --project 00000000-0000-0000-0000-000000000000 \
        --name user-private-network

# lookup the network ID and create a machine
docker-compose run metalctl machine create \
        --description test \
        --name machine \
        --hostname machine \
        --project 00000000-0000-0000-0000-000000000000 \
        --partition mini-lab \
        --image ubuntu-20.04 \
        --size v1-small-x86 \
        --networks <network-ID>

# create a firewall that is also connected to the virtual internet-mini-lab network
docker-compose run metalctl machine create \
        --description fw \
        --name fw \
        --hostname fw \
        --project 00000000-0000-0000-0000-000000000000 \
        --partition mini-lab \
        --image firewall-ubuntu-2.0 \
        --size v1-small-x86 \
        --networks internet-mini-lab,$(privatenet)

See the installation process in action

make console-machine01/02
...
Ubuntu 20.04 machine ttyS0

machine login:

Two machines are now installed and have status "Phoned Home"

docker-compose run metalctl machine ls
ID                                          LAST EVENT   WHEN   AGE     HOSTNAME  PROJECT                               SIZE          IMAGE                             PARTITION
e0ab02d2-27cd-5a5e-8efc-080ba80cf258        Phoned Home  2s     21s     machine   00000000-0000-0000-0000-000000000000  v1-small-x86  Ubuntu 20.04 20200331             mini-lab
2294c949-88f6-5390-8154-fa53d93a3313        Phoned Home  8s     18s     fw        00000000-0000-0000-0000-000000000000  v1-small-x86  Firewall 2 Ubuntu 20200730        mini-lab

Login with user name metal and the console password from

docker-compose run metalctl machine consolepassword e0ab02d2-27cd-5a5e-8efc-080ba80cf258

If you want to access the firewall with SSH or have internet connectivity from the firewall and machine, you'll need to have a static route configured that points to the leaf switches:

# Add the route to the network internet-mini-lab 100.255.254.0/24 via leaf01 and leaf02, whose IPs are dynamically allocated. Make sure there's no old route before execution.
make route

# Connect to the firewall
ssh metal@100.255.254.1

To remove the kind cluster, the switches and machines, run:

make cleanup

Reinstall machine

Reinstall a machine with

docker-compose run metalctl machine reinstall \
        --image ubuntu-20.04 \
        e0ab02d2-27cd-5a5e-8efc-080ba80cf258

Free machine

Free a machine with

docker-compose run metalctl machine rm e0ab02d2-27cd-5a5e-8efc-080ba80cf258

Flavors

There's few versions of mini-lab environment that you can run. We call them flavors. There's 2 flavors at the moment:

  • default -- runs 2 machines.
  • cluster-api -- runs 3 machines. Usefull for testing Control plane and worker node deployment with Cluster API provider.
  • sonic -- use SONiC as network operating system for the leaves

In order to start specific flavor, you can define the flavor as follows:

export MINI_LAB_FLAVOR=cluster-api
make