computer-playbook/roles/web-app-pihole/README.md

web-app-pihole

Deploys Pi-hole — a network-wide ad blocker — as a Docker-based service within the Infinito.Nexus platform.

Description

Deploys Pi-hole — a network-wide DNS sinkhole for ad and tracker blocking — with OAuth2/Keycloak SSO protection as part of the Infinito.Nexus stack.

Overview

This role deploys Pi-hole as a containerized service within the Infinito.Nexus platform. Access is protected by OAuth2/Keycloak SSO, with RBAC enforced via OpenLDAP group membership.

Cosmos

The diagram places web-app-pihole in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).

flowchart LR
    subgraph deps [Dependencies]
        dep_svc_bkp_volume_2_local["svc-bkp-volume-2-local 💻"]
        dep_svc_net_tor["svc-net-tor 🐳🐝"]
        dep_web_app_dashboard["web-app-dashboard 🐳🐝"]
        dep_web_app_keycloak["web-app-keycloak 🐳🐝"]
        dep_web_app_matomo["web-app-matomo 🐳🐝"]
        dep_web_app_prometheus["web-app-prometheus 🐳🐝"]
        dep_web_app_stalwart["web-app-stalwart 🐳🐝"]
        dep_web_svc_css["web-svc-css 💻"]
        dep_web_svc_logout["web-svc-logout 🐳🐝"]
    end
    subgraph role [web-app-pihole 🐳]
        svc_logout["logout"]
        svc_dashboard["dashboard"]
        svc_matomo["matomo"]
        svc_email["email ❌"]
        svc_javascript["javascript"]
        svc_prometheus["prometheus"]
        svc_tor["tor"]
        svc_css["css"]
        svc_sso["sso"]
        svc_pihole["pihole"]
        svc_container_backup["container_backup"]
    end
    dep_svc_bkp_volume_2_local -. "0..1" .-> svc_container_backup
    dep_svc_net_tor -. "0..1" .-> svc_tor
    dep_web_app_dashboard -. "0..1" .-> svc_dashboard
    dep_web_app_keycloak -. "0..1" .-> svc_javascript
    dep_web_app_keycloak -. "0..1" .-> svc_sso
    dep_web_app_matomo -. "0..1" .-> svc_matomo
    dep_web_app_prometheus -. "0..1" .-> svc_prometheus
    dep_web_app_stalwart -- "0..0" --> svc_email
    dep_web_svc_css -. "0..1" .-> svc_css
    dep_web_svc_logout -. "0..1" .-> svc_logout
    linkStyle 7 stroke:red;

Solid 1:1 edges are fixed relationships; dashed 0..1 edges are conditional (enabled only in matching deployments); red 0..0 edges are turned off in this role. Node markers show the role's deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in meta/main.yml.

Features

• OAuth2/SSO protection via Keycloak and oauth2-proxy
• RBAC — only users in the web-app-pihole-administrator group can access the dashboard
• OpenLDAP integration for group synchronization
• Logout button injected into the Pi-hole admin navbar via JavaScript
• Auto-redirect from Pi-hole root 403 page to /admin/
• Redis session storage for oauth2-proxy
• Prometheus metrics support

Quick Setup

Development

Clone, set up the workstation, and deploy web-app-pihole onto the local stack:

git clone https://github.com/infinito-nexus/core.git
cd core
make onboard
make compose-deploy mode=reinstall apps=web-app-pihole full_cycle=false

Production

Run the published image to provision the inventory and deploy web-app-pihole to a managed server (the mounted volume persists the inventory):

APP=web-app-pihole
HOST=<your-server>
DOMAIN=<your-domain>
TLS_MODE=self_signed
SSH_PUBLIC_KEY="<your-ssh-public-key>"

docker run --rm -it \
  -v "$PWD/inventories:/etc/infinito.nexus/inventories" \
  -e APP="$APP" -e HOST="$HOST" -e DOMAIN="$DOMAIN" -e TLS_MODE="$TLS_MODE" -e SSH_PUBLIC_KEY="$SSH_PUBLIC_KEY" \
  ghcr.io/infinito-nexus/core/debian bash -c '
    INVENTORY=/etc/infinito.nexus/inventories/production
    infinito administration inventory provision "$INVENTORY" \
      --inventory-file "$INVENTORY/devices.yml" \
      --host "$HOST" \
      --include "$APP" \
      --vars "{\"TLS_MODE\": \"$TLS_MODE\", \"DOMAIN_PRIMARY\": \"$DOMAIN\", \"users\": {\"administrator\": {\"authorized_keys\": [\"$SSH_PUBLIC_KEY\"]}}}" &&
    infinito administration deploy dedicated "$INVENTORY/devices.yml" \
      --password-file "$INVENTORY/.password" \
      --diff -vv'

Access

After deployment, Pi-hole is available at: https://pihole.<DOMAIN_PRIMARY>/admin/

Access is protected by SSO. Users must be members of the web-app-pihole-administrator group in Keycloak/LDAP.

Dependencies

• web-app-keycloak — for SSO/OIDC authentication
• svc-db-openldap — for LDAP group synchronization

Configuration

Variable	Description	Default
pihole.upstream_dns	Upstream DNS servers	{{ NETWORK_PUBLIC_DNS_RESOLVERS }}

Variants

Variant	Description
0	Default deploy with OAuth2/Keycloak protection

E2E Tests

Four Playwright scenarios are tested:

1. Pi-hole is protected — unauthenticated access redirects to Keycloak
2. Admin can log in via SSO and access the dashboard
3. Biber (non-admin) is denied access
4. Admin can log out via the logout button

Credits

Implemented by Prageeth Panicker. Part of the Infinito.Nexus Project and maintained by Kevin Veen-Birkenbach. Licensed under the Infinito.Nexus Community License (Non-Commercial).