Replace Traefik Crowdsec bouncer container with plugin, install iptables bouncer

[bubacoder]

Summary by CodeRabbit

• New Features

  • Introduced a new environment variable for managing collections in the Crowdsec service.
  • Enabled improved network connectivity by connecting the Crowdsec service to the proxy network.
  • Added support for a new Crowdsec bouncer API key in the Traefik service configuration.
  • Integrated a plugin-based approach for authentication middleware, offering dynamic key management and a live operational mode.
  • Rolled out experimental plugin support with clear versioning details.
  • Added new configuration options for managing the installation of the CrowdSec bouncer.
  • Introduced a new task for installing and configuring the CrowdSec firewall bouncer on Debian-based systems.
  • Added a new task to conditionally install the Crowdsec iptables bouncer.

• Chores

  • Removed deprecated bouncer integration.
  • Updated underlying container base images for improved performance.
  • Restored the nas host entry in the inventory configuration.
  • Added a new handler for restarting the Crowdsec firewall bouncer service.
  • Updated Ansible configuration to align with new standards.

[coderabbitai]

Walkthrough

The changes update the security service configurations and Traefik middleware integration. In the Docker Compose configurations, new environment variables and network settings are added while a deprecated service is removed. The Traefik configuration revises the middleware handling for the Crowdsec bouncer, transitioning from an old forward authentication method to a plugin-based structure. Additionally, an experimental section is introduced to declare the plugin details, and the logrotate base image is updated.

Changes

File(s)	Change Summary
docker/security/crowdsec.yaml, docker/security/traefik.yaml	crowdsec.yaml: Added COLLECTIONS env variable with a reference comment; added a new networks section for the proxy network; removed the deprecated crowsec-traefik-bouncer service; updated bottom network name from default to proxy. traefik.yaml: Added CROWDSEC_BOUNCER_API_KEY env variable to the traefik service; updated the logrotate base image from alpine:3.20 to alpine:3.21.
docker/security/traefik/dynamic/middlewares.yml, docker/security/traefik/traefik.yml	middlewares.yml: Replaced the forwardAuth middleware configuration with a plugin-based configuration for crowdsec-bouncer-traefik-plugin, including settings for enabling the plugin, API key sourcing, host, and mode. traefik.yml: Added a new experimental section to declare the crowdsec-bouncer-traefik-plugin with its moduleName and version.
ansible/inventory/group_vars/debian/vars.yaml, ansible/inventory/inventory.yaml	vars.yaml: Added new variable install_crowdsec_bouncer set to false. inventory.yaml: Added host nas as an empty dictionary; added variable install_crowdsec_bouncer set to true under nest.
ansible/roles/debian_base/tasks/45-crowdsec.yaml, ansible/roles/debian_base/tasks/main.yaml	45-crowdsec.yaml: Introduced tasks for adding CrowdSec GPG key, repository, and installing crowdsec-firewall-bouncer-iptables. main.yaml: Added a task to install the Crowdsec iptables bouncer, conditional on install_crowdsec_bouncer being true.
ansible/roles/debian_base/handlers/main.yaml	Added a new handler for restarting the crowdsec-firewall-bouncer service.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Traefik
    participant Middleware as "Crowdsec Bouncer Plugin"
    participant Crowdsec

    Client->>Traefik: Send HTTP request
    Traefik->>Middleware: Invoke plugin for auth check
    Middleware->>Crowdsec: Validate request (using LAPI key & host)
    Crowdsec-->>Middleware: Return authentication status
    Middleware-->>Traefik: Relay auth result
    Traefik-->>Client: Forward or block request

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