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:

```bash
export VAGRANT_POOL="10.100.0.0/16"
```

* Clone this repo

```bash
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:

```bash
pushd ccp
./ccp-pull.sh
popd
```

* Prepare the virtual lab:

```bash
vagrant up
```

Deployment on a lab
-------------------

* Login to master node and sudo to root:

```bash
vagrant ssh $USER-k8s-01
sudo su -
```

* Clone this repo

```bash
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)

```bash
cd ~/mcp
./bootstrap-master.sh
```

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

```bash
cd ~/mcp
cat nodes
```

* Deploy k8s using kargo playbooks

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

* Deploy OpenStack CCP:

```bash
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:

```bash
# 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

    * Some basic commands
```bash
# 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
```
    * Network checker
```bash
cd ~/mcp
./deploy-netchecker.sh
# or in openstack namespace
./deploy-netchecker.sh openstack