Switch Pulp to use sqlite3 as default

.travis.yml

@@ -2,6 +2,9 @@ sudo: false
 # https://docs.travis-ci.com/user/trusty-ci-environment/
 dist: trusty
 language: python
+env:
+  - DB=sqlite
+  - DB=postgres
 python:
     # python versions used in el7 SCL & supported fedora
     - "3.5"
@@ -20,8 +23,10 @@ install:
     - "pushd pulpcore/ && pip install -e . && popd"
     - "pushd plugin/ && pip install -e .  && popd"
 before_script:
-    - psql -U postgres -c "CREATE USER pulp WITH SUPERUSER LOGIN;"
-    - psql -U postgres -c "CREATE DATABASE pulp OWNER pulp;"
+    - sh -c "if [ '$DB' = 'postgres' ]; then sed -i \"s/'ENGINE': 'django.db.backends.sqlite3'/'ENGINE': 'django.db.backends.postgresql_psycopg2'/\" pulpcore/pulpcore/app/settings.py"
+    - sh -c "if [ '$DB' = 'postgres' ]; then sed -i \"s/'USER': ''/'USER': 'pulp'/\" pulpcore/pulpcore/app/settings.py"
+    - sh -c "if [ '$DB' = 'postgres' ]; then psql -U postgres -c 'CREATE USER pulp WITH SUPERUSER LOGIN;'"
+    - sh -c "if [ '$DB' = 'postgres' ]; then psql -U postgres -c 'CREATE DATABASE pulp OWNER pulp;'"
 script:
     # flake8
     - "flake8 --config flake8.cfg"

pulpcore/pulpcore/app/settings.py

@@ -168,9 +168,9 @@
     # https://docs.djangoproject.com/en/1.8/ref/settings/#databases
     'databases': {
         'default': {
-            'ENGINE': 'django.db.backends.postgresql_psycopg2',
+            'ENGINE': 'django.db.backends.sqlite3',
             'NAME': 'pulp',
-            'USER': 'pulp',
+            'USER': '',
             'CONN_MAX_AGE': 0,
         },
     },

pulpcore/pulpcore/etc/pulp/server.yaml

@@ -17,15 +17,15 @@
 # shipped with your version of Django, or online at
 # https://docs.djangoproject.com/en/1.8/ref/settings/#databases
 #
-# By default, Pulp will attempt to connect to PostgreSQL on a local Unix
-# socket using the 'pulp' user with a database name of 'pulp'.
+# By default, Pulp will use a sqlite3 database. If your environment is used in production
+# consider configuring Postgresql or another Django supported database.
 #
 # databases:
 #   default:
 #     CONN_MAX_AGE: 0
-#     ENGINE: django.db.backends.postgresql_psycopg2
-#     NAME: pulp
-#     USER: pulp
+#     ENGINE: django.db.backends.sqlite3
+#     NAME:
+#     USER:
 #     PASSWORD:
 #     HOST:
 #     PORT: