feat: deploy SearXNG search engine with Valkey rate limiting

- Add SearXNG service on port 6060 (replaces old port 11112)
- Add Valkey for rate limiting (5/min, 60/hour, 500/day)
- Add Nginx reverse proxy with X-Real-IP and X-Forwarded-For headers
- Configure JSON format and French locale
- Add rate limiting configuration in limiter.toml
- Add Valkey configuration in valkey.conf

docker-compose.yml

@@ -6,20 +6,44 @@
 services:
 
   # ─────────────────────────────────────────────────────────
-  # 0. SEARXNG - Meta-search Engine (Web Search)
+  # 0. VALKEY - Backend de rate limiting pour SearXNG
-  #    → http://192.168.1.27:11112
+  #    → Port interne uniquement (non exposé)
+  # ─────────────────────────────────────────────────────────
+  valkey:
+    image: valkey/valkey:7-alpine
+    container_name: effi-valkey
+    restart: unless-stopped
+    command: valkey-server /usr/local/etc/valkey/valkey.conf
+    volumes:
+      - ./searxng-config/valkey.conf:/usr/local/etc/valkey/valkey.conf:ro
+      - valkey-data:/data/valkey-data
+    networks:
+      - effi-net
+
+  # ─────────────────────────────────────────────────────────
+  # 1. SEARXNG - Meta-search Engine (API JSON)
+  #    → http://192.168.1.27:6060
   # ─────────────────────────────────────────────────────────
   searxng:
     image: searxng/searxng:latest
     container_name: effi-searxng
     restart: unless-stopped
     ports:
-      - "11112:8080"
+      - "6060:8080"
     volumes:
-      - ./searxng-data:/etc/searxng:rw
+      - ./searxng-config/settings.yml:/etc/searxng/settings.yml:ro
     environment:
-      - SEARXNG_BASE_URL=http://192.168.1.27:11112/
+      - SEARXNG_BASE_URL=http://192.168.1.27:6060/
       - SEARXNG_SECRET=${SEARXNG_SECRET_KEY}
+      - SEARXNG_SETTINGS_PATH=/etc/searxng/settings.yml
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/healthz"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+    depends_on:
+      - valkey
     networks:
       - effi-net
 
@@ -265,3 +289,4 @@ volumes:
   open-webui-data:
   pipelines-data:
   whisper-cache:
+  redis-data:

proxy-config/nginx.conf

@@ -0,0 +1,22 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    upstream searxng {
+        server effi-searxng:8080;
+    }
+
+    server {
+        listen 6060;
+        server_name localhost;
+
+        location / {
+            proxy_pass http://searxng;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+    }
+}

searxng-config/limiter.toml

@@ -0,0 +1,50 @@
+[botdetection]
+
+# The prefix defines the number of leading bits in an address that are compared
+# to determine whether or not an address is part of a (client) network.
+
+ipv4_prefix = 32
+ipv6_prefix = 48
+
+# If the request IP is in trusted_proxies list, the client IP address is
+# extracted from the X-Forwarded-For and X-Real-IP headers. This should be
+# used if SearXNG is behind a reverse proxy or load balancer.
+
+trusted_proxies = [
+  '127.0.0.0/8',
+  '::1',
+  '172.19.0.0/16',
+  # '192.168.0.0/16',
+  # '172.16.0.0/12',
+  # '10.0.0.0/8',
+  # 'fd00::/8',
+]
+
+[botdetection.ip_limit]
+
+# To get unlimited access in a local network, by default link-local addresses
+# (networks) are not monitored by the ip_limit
+filter_link_local = false
+
+# activate link_token method in the ip_limit method
+link_token = false
+
+[botdetection.ip_lists]
+
+# In the limiter, the ip_lists method has priority over all other methods -> if
+# an IP is in the pass_ip list, it has unrestricted access and it is also not
+# checked if e.g. the "user agent" suggests a bot (e.g. curl).
+
+block_ip = [
+  # '93.184.216.34',  # IPv4 of example.org
+  # '257.1.1.1',      # invalid IP --> will be ignored, logged in ERROR class
+]
+
+pass_ip = [
+  # '192.168.0.0/16',      # IPv4 private network
+  # 'fe80::/10'            # IPv6 linklocal / wins over botdetection.ip_limit.filter_link_local
+]
+
+# Activate passlist of (hardcoded) IPs from the SearXNG organization,
+# e.g. `check.searx.space`.
+pass_searxng_org = true

searxng-config/settings.yml

@@ -0,0 +1,61 @@
+use_default_settings: true
+
+general:
+  instance_name: "Effi Search"
+  debug: false
+
+search:
+  format: json
+  max_results: 15
+  default_lang: fr
+  safe_search: 0
+  autocomplete: "google"
+  default_locale: fr
+  formats:
+    - html
+    - json
+
+server:
+  secret_key: "${SEARXNG_SECRET_KEY}"
+  bind_address: "0.0.0.0"
+  port: 8080
+  limiter: true
+  image_proxy: true
+  public_instance: false
+  method: "GET"
+  default_http_headers:
+    X-Content-Type-Options: nosniff
+    X-Download-Options: noopen
+    X-Robots-Tag: noindex, nofollow
+    Referrer-Policy: no-referrer
+
+valkey:
+  url: "valkey://172.19.0.12:6379/0"
+
+limiter:
+  enabled: true
+  search_url: false
+  key:
+    - "client_ip"
+  limits:
+    search: "5/minute;60/hour;500/day"
+    other: "10/minute;100/hour"
+  whitelist: []
+
+ui:
+  default_theme: simple
+  static_use_hash: true
+  default_view: index
+  infinite_scroll: false
+
+outgoing:
+  request_timeout: 10.0
+  max_request_timeout: 15.0
+  pool_connections: 100
+  pool_maxsize: 20
+  enable_http2: true
+  useragent_suffix: ""
+
+enable_obfuscation: false
+
+enable_http2: true

searxng-config/valkey.conf

@@ -0,0 +1,26 @@
+# Redis configuration for SearXNG rate limiting
+bind 0.0.0.0
+protected-mode no
+port 6379
+tcp-backlog 511
+timeout 0
+tcp-keepalive 300
+daemonize no
+supervised no
+pidfile /var/run/redis_6379.pid
+loglevel notice
+databases 1
+save 900 1
+save 300 10
+save 60 10000
+stop-writes-on-bgsave-error yes
+rdbcompression yes
+rdbchecksum yes
+dbfilename dump.rdb
+dir /data
+appendonly no
+appendfilename "appendonly.aof"
+hz 10
+dynamic-hz yes
+aof-rewrite-incremental-fsync yes
+rdb-save-incremental-fsync yes