From ed8e578a07ba86fc3af4eb4aaa41ef0b23763824 Mon Sep 17 00:00:00 2001
From: Henrik Levkowetz <henrik@levkowetz.com>
Date: Tue, 23 Jun 2020 20:41:26 +0000
Subject: [PATCH] Separated the session cache from the default cache, using
 slightly different settings, in order to not drop sessions when a new release
 is deployed.  - Legacy-Id: 18041

---
 ietf/settings.py           | 10 ++++++++++
 ietf/settings_testcrawl.py |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/ietf/settings.py b/ietf/settings.py
index c16319491..4972a163a 100644
--- a/ietf/settings.py
+++ b/ietf/settings.py
@@ -332,6 +332,7 @@ SESSION_EXPIRE_AT_BROWSER_CLOSE = False
 SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer'
 SESSION_ENGINE = "django.contrib.sessions.backends.cache"
 SESSION_SAVE_EVERY_REQUEST = True
+SESSION_CACHE_ALIAS = 'sessions'
 
 PREFERENCES_COOKIE_AGE = 60 * 60 * 24 * 365 * 50 # Age of cookie, in seconds: 50 years
 
@@ -722,6 +723,12 @@ CACHES = {
         'VERSION': __version__,
         'KEY_PREFIX': 'ietf:dt',
     },
+    'sessions': {
+        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+        'LOCATION': '127.0.0.1:11211',
+        # No release-specific VERSION setting.
+        'KEY_PREFIX': 'ietf:dt',
+    },
     'htmlized': {
         'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
         'LOCATION': '/a/cache/datatracker/htmlized',
@@ -1161,6 +1168,9 @@ if SERVER_MODE != 'production':
             'VERSION': __version__,
             'KEY_PREFIX': 'ietf:dt',
         },
+        'sessions': {
+            'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
+        },
         'htmlized': {
             'BACKEND': 'django.core.cache.backends.dummy.DummyCache',
             #'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
diff --git a/ietf/settings_testcrawl.py b/ietf/settings_testcrawl.py
index 8848c0933..06dd28eb7 100644
--- a/ietf/settings_testcrawl.py
+++ b/ietf/settings_testcrawl.py
@@ -27,6 +27,10 @@ CACHES = {
             'MAX_ENTRIES': 10000,
         },
     },
+    'sessions': {
+        'BACKEND': 'django.core.cache.backends.memcached.LocMemCache',
+        # No version-specific VERSION setting.
+    },
     'htmlized': {
         'BACKEND': 'django.core.cache.backends.dummy.DummyCache',
         #'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',