Use redis for cache.

- Cache use db #1 of redis.
- Channel layer (of channels) use db #0 of redis.
- `settings` try getting redis connection variables from environment.
- Drop memcached system

cof/settings_dev.py

@@ -115,15 +115,6 @@ USE_L10N = True
 USE_TZ = True
 
 
-# Cache system
-CACHES = {
-    'default': {
-        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
-        'LOCATION': '127.0.0.1:11211',
-    }
-}
-
-
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/1.8/howto/static-files/
 
@@ -176,13 +167,39 @@ RECAPTCHA_PUBLIC_KEY = "DUMMY"
 RECAPTCHA_PRIVATE_KEY = "DUMMY"
 RECAPTCHA_USE_SSL = True
 
-# Channels settings
+
+# Redis settings (for cache and channel layers)
+
+REDIS_HOST = os.environ.get("REDIS_HOST", "localhost")
+REDIS_USER = os.environ.get("REDIS_USER", "")
+REDIS_PASS = os.environ.get("REDIS_PASS", "")
+REDIS_PORT = os.environ.get("REDIS_PORT", "6379")
+
+REDIS_AUTH = REDIS_USER+":"+REDIS_PASS+"@" if REDIS_USER or REDIS_PASS else ''
+REDIS_BASE_URL = "redis://" + REDIS_AUTH + REDIS_HOST + ":" + REDIS_PORT
+
+
+# Cache settings (use db #1 of redis)
+
+CACHE_REDIS_URL = REDIS_BASE_URL + "/1"
+
+CACHES = {
+    'default': {
+        'BACKEND': 'redis_cache.RedisCache',
+        'LOCATION': CACHE_REDIS_URL,
+    }
+}
+
+
+# Channels settings (use db #0 of redis)
+
+CHANNEL_REDIS_URL = REDIS_BASE_URL + "/0"
 
 CHANNEL_LAYERS = {
     "default": {
         "BACKEND": "asgi_redis.RedisChannelLayer",
         "CONFIG": {
-            "hosts": [(os.environ.get("REDIS_HOST", "localhost"), 6379)],
+            "hosts": [CHANNEL_REDIS_URL],
         },
         "ROUTING": "cof.routing.channel_routing",
     }

provisioning/bootstrap.sh

@@ -9,7 +9,7 @@ DBPASSWD="4KZt3nGPLVeWSvtBZPSM3fSzXpzEU4"
 
 # Installation de paquets utiles
 apt-get update && apt-get install -y python3-pip python3-dev python3-venv \
-	libmysqlclient-dev libjpeg-dev git redis-server memcached
+	libmysqlclient-dev libjpeg-dev git redis-server
 pip install -U pip
 
 # Configuration et installation de mysql. Le mot de passe root est le même que

requirements.txt

@@ -5,6 +5,7 @@ django-autoslug==1.9.3
 django-cas-ng==3.5.5
 django-grappelli==2.8.1
 django-recaptcha==1.0.5
+django-redis-cache==1.7.1
 mysqlclient==1.3.7
 Pillow==3.3.0
 six==1.10.0
@@ -21,4 +22,3 @@ git+https://git.eleves.ens.fr/cof-geek/django_custommail.git#egg=django_customma
 ldap3
 git+https://github.com/Aureplop/channels.git#egg=channels
 python-dateutil
-python-memcached