Monitoring Lab: K8s

Successor to the Docker Compose based monitoring lab, this time in Kubernetes.

Assumptions

The hosts in the inventory are reachable and you can authenticate with your SSH key to the ubuntu user on each machine.

1. Create 5 VMs with ubuntu user
2. Add SSH public key to ~/.ssh/authorized_keys of ubuntu user
3. Make sure all hosts are reachable via hostname from ansible machine.

🤝 Dependencies

• ansible
• 5 servers (VMs): k8s1, k8s2, k8s3, k8skw1, k8skw2

⏩ Quickstart

Run the ansible playbook:

ansible-playbook configure-k8s-cluster.yml

Optional

If you need to target specific tags or hosts, here are some examples:

# Install dependencies on all hosts
ansible-playbook configure-k8s-cluster.yml -t setup

# Other examples
ansible-playbook configure-k8s-cluster.yml -t hostname --limit control_nodes
ansible-playbook configure-k8s-cluster.yml -t k8s --limit primary_control_node,secondary_control_nodes

Update ubuntu

ansible-playbook update-ubuntu.yml

Get k8s version

ansible-playbook get-k8s-versions.yml