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https://github.com/rpenziol/proxmox-kubernetes-bootstrap

This is a collection of resources to get a Kubernetes cluster up and running in a Proxmox Virtual Environment. These tools and commands assume the user is executing in a Linux or Linux-like environment.
https://github.com/rpenziol/proxmox-kubernetes-bootstrap

ansible guide kubernetes kubespray proxmox

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This is a collection of resources to get a Kubernetes cluster up and running in a Proxmox Virtual Environment. These tools and commands assume the user is executing in a Linux or Linux-like environment.

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# PROXMOX KUBERNETES BOOTSTRAP



## Description

This is a collection of resources to get a Kubernetes cluster up and running in a Proxmox Virtual Environment. These tools and commands assume the user is executing in a Linux or Linux-like environment.

# Prerequisites



* Proxmox 6 or newer server up and running

* A set of RSA SSH keys generated (Specifically, a public key located at `$HOME/.ssh/id_rsa.pub`)

* Install Python 3

* [Install Docker](https://github.com/docker/docker-install#usage)

* Install Ansible and its dependencies



    ```bash

    python -m pip install -r ansible/requirements.txt

    exec bash --login  # Reload shell to add 'ansible-playbook' and 'ansible-galaxy' to your path

    ```



    Note: in some environments you may need to use `python3` instead of `python`

* Install Ansible collections



    ```bash

    ansible-galaxy install -r ansible/requirements.yml

    ```



# Create a VM template



## Copy the example configuration files



```bash

# From the repo's root path

cp ansible/group_vars/example-all.yml ansible/group_vars/all.yml

cp ansible/inventories/example-hosts.yml ansible/inventories/hosts.yml

cp ansible/inventories/example-proxmox.json ansible/inventories/proxmox.json

```



Fill in the `ansible/group_vars/all.yml`, `ansible/inventories/hosts.yml`, and `ansible/inventories/proxmox.json` files with values that are appropriate for your environment.



## Create your ubuntu-2004-server template



```bash

cd ansible # All the following steps assume you're in the 'ansible' directory. Ansible is directory dependant.

ansible-playbook proxmox_new_vm_template.yml -K

```



# Clone and prepare Kubernetes VMs



## Create Kubernetes control plane VMs



Note: All `ansible-playbook` commands should be run from the 'ansible' directory. Ansible is directory dependant.



```bash

# Use a for loop to create multiple systems. Set NUM_CONTROL_PLANE equal to the number of VMs you want.

#

# Minimum required: 1

# Kubespray requires an odd number of control plane nodes.

NUM_CONTROL_PLANE=1

for i in {1..${NUM_CONTROL_PLANE}} ; do ansible-playbook proxmox_k8s_new_master_vm.yml ; done

```



## Create Kubernetes node VMs



```bash

# Use a for loop to create multiple systems. Set NUM_NODES equal to the number of VMs you want.

#

# Minimum required: 1

NUM_NODES=1

for i in {1..${NUM_NODES}} ; do ansible-playbook proxmox_k8s_new_node_vm.yml ; done

```



## Prepare VMs



```bash

# Install 'sshpass' dependency locally for password authentication.

sudo apt-get install sshpass -y



ansible-playbook proxmox_vms_start_all.yml # Start all VMs. They automatically shutdown after being cloned.



ansible-playbook proxmox_k8s_vm_base_setup.yml -k # Ansible will prompt for a password. The default password defined in the template is 'ubuntu'

```



# Kubespray - Deploy Kubernetes



## (Optional, not recommended) Create kubespray Docker image



Note: This will pull the latest kubespray changes from GitHub, where the official kubespray Docker image may be months old



```bash

# This will take a few minutes

ansible-playbook kubespray_create_docker_image.yml

```



## Copy sample inventory files



```bash

# Run this command if you did the optional step above and wish to use the latest kubespray updates (not recommended)

DOCKER_IMAGE=kubespray_github

# Run this command if you wish to use the official kubespray Docker image (recommended)

DOCKER_IMAGE=quay.io/kubespray/kubespray:v2.19.1



CID=$(docker create ${DOCKER_IMAGE})

docker cp ${CID}:/kubespray/inventory/sample mycluster

docker rm ${CID}

```



Make any desired modifications to the files in "mycluster"



## Run deploy



```bash

docker run --name kubespray -d -t \

    -v $(pwd)/mycluster:/kubespray/inventory/mycluster \

    -v $(pwd)/inventories/proxmox.json:/kubespray/inventory/mycluster/proxmox.json \

    -v $(pwd)/inventories/proxmox.py:/kubespray/inventory/mycluster/proxmox.py \

    -v $HOME/.ssh/id_rsa:/root/.ssh/id_rsa \

    ${DOCKER_IMAGE}



docker exec -it kubespray ansible-playbook -i inventory/mycluster/proxmox.py --user=ubuntu --become --become-user=root cluster.yml

```



# kubectl - Manager your Kubernetes cluster - WIP



## Authorization



```bash

mkdir -p $HOME/.kube



IP=192.168.1.133  # Master node IP address



ssh ubuntu@${IP} 'mkdir -p $HOME/.kube && sudo cp -f /etc/kubernetes/admin.conf $HOME/.kube/config'



ssh ubuntu@${IP} 'sudo cat $HOME/.kube/config' > $HOME/.kube/config



sudo chown $(id -u):$(id -g) $HOME/.kube/config

```



## Dashboard Tokens



```bash

kubectl create serviceaccount dashboard -n default



kubectl create clusterrolebinding dashboard-admin -n default --clusterrole=cluster-admin --serviceaccount=default:dashboard



kubectl get secret $(kubectl get serviceaccount dashboard -o jsonpath="{.secrets[0].name}") -o jsonpath="{.data.token}" | base64 --decode

```



## Dummy deploy



```bash

kubectl run kubia --image=luksa/kubia --port=8080



kubectl expose pod kubia --type=LoadBalancer --name kubia-http



kubectl get services



kubectl proxy

```



# Proxmox CLI cheat sheet - Potentially useful commands



Note: These commands must be run on the Proxmox host as root



## Snapshot commands



```bash

qm list | grep running | awk '{print $1}' | xargs -I {} qm snapshot {} base --vmstate true

qm list | grep running | awk '{print $1}' | xargs -I {} qm rollback {} base

qm list | awk '{print $1}' | grep [0-9] | xargs -i sh -c "qm start {} || true"

```