vagrant-k8s

Scripts to create libvirt lab with vagrant and prepare some stuff for k8s deployment with kargo.

Requirements

• libvirt
• vagrant
• vagrant-libvirt plugin (vagrant plugin install vagrant-libvirt)
• $USER should be able to connect to libvirt (test with virsh list --all)

How-to

Vargant lab preparation

• Change default IP pool for vagrant networks if you want:

export VAGRANT_POOL="10.100.0.0/16"

• Clone this repo

git clone https://github.com/adidenko/vagrant-k8s
cd vagrant-k8s

• If you want to run OpenStack CCP (Containerised Control Plane) then you need to pull CCP repos and patches:

pushd ccp
./ccp-pull.sh
popd

• Prepare the virtual lab:

vagrant up

Deployment on a lab

• Login to master node and sudo to root:

vagrant ssh $USER-k8s-01
sudo su -

• Clone this repo

git clone https://github.com/adidenko/vagrant-k8s ~/mcp

• Install required software and pull needed repos (modify script if you're not running it on Vagrant lab, you'll need to create nodes list manually and clone microservices and microservices-repos repositories, see ccp-pull.sh for details)

cd ~/mcp
./bootstrap-master.sh

• Check nodes list and make sure you have SSH access to them

cd ~/mcp
cat nodes

• Deploy k8s using kargo playbooks

cd ~/mcp
./deploy-k8s.kargo.sh

• Deploy OpenStack CCP:

cd ~/mcp
./deploy-ccp.sh

Working with kubernetes

• Login to one of your kube-master nodes (see /root/kargo/inventory/inventory.cfg on master node) and run:

# List images in registry
curl -s 127.0.0.1:31500/v2/_catalog | python -mjson.tool

# Check CCP jobs status
kubectl --namespace=openstack get jobs

# Check CCP pods
kubectl --namespace=openstack get pods -o wide

• Troubleshooting

# Get logs from pod
kubectl --namespace=openstack logs $POD_NAME

# Exec command from pod
kubectl --namespace=openstack exec $POD_NAME cat /etc/resolv.conf
kubectl --namespace=openstack exec $POD_NAME curl http://etcd-client:2379/health

# Run a container
docker run -t -i 127.0.0.1:31500/mcp/neutron-dhcp-agent /bin/bash