Supervisor Pool

1. Introduction

In the infrastructure, we have 3 masters that ensure the clustering of Kubernetes as well as the application masters of other programs. This coexistence is called Sidecar.

2. Roles

The Supervisor plays a significant role in managing and ensuring the proper functioning of the cluster.

• Administration of the Kubernetes cluster by interacting with the Control plane
• Backup storage via the network (GlusterFS)
• Handles versioning and CI with Gitlab Server
• Infrastructure management using the Protobox software (Ansible)
• Acts as a bastion for SSH access
• Externalizes Git on a private network intended for developers
• Bastion for VSCode

3. Networking

3.1 Interfaces

• box-network

4. Volumes

5. Applications

• Gitlab Server
• Gitlab Containers Registry
• Docker
• Kubectl
• Kustomize
• GlusterFS
• Ansible

6. Installation

- name: Setup supervisor host
  hosts: supervisor-2
  become: true
  user: supervisor
  gather_facts: false
  roles:
    - role: set-hostname
    - {role: network-setup}
    - {role: gateway, iptables: true, nginx_enabled: false, haproxy_enabled: false, iptables: false}
    - role: etc-hosts
    - role: monitoring/node-exporter
    - role: docker
    - role: docker-compose
    - role: dnsmasq
      vars:
        install: true
      vars:
        installation: false
    - {role: ldap, install: false}
    - role: factory/init
    - {role: factory/gitlab, runtime: "systemd", install: true}
    - role: kubernetes/kubectl-setup
      vars:
        distant_host: true

7. Summary