title: Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?
body: <p>I tried to deploy my Django project on Heroku but everytime I try 'heroku run python3 manage.py migrate' I get this error:</p>
  
  <pre><code>/app/.heroku/python/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: &lt;http://initd.org/psycopg/docs/install.html#binary-install-from-pypi&gt;.
    """)
  Traceback (most recent call last):
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
      self.connect()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
      self.connection = self.get_new_connection(conn_params)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
      connection = Database.connect(**conn_params)
    File "/app/.heroku/python/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect
      conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
  psycopg2.OperationalError: could not connect to server: Connection refused
      Is the server running on host "localhost" (127.0.0.1) and accepting
      TCP/IP connections on port 5432?
  
  
  The above exception was the direct cause of the following exception:
  
  Traceback (most recent call last):
    File "manage.py", line 15, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
      utility.execute()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
      self.execute(*args, **cmd_options)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
      output = self.handle(*args, **options)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 79, in handle
      executor = MigrationExecutor(connection, self.migration_progress_callback)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/executor.py", line 18, in __init__
      self.loader = MigrationLoader(self.connection)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in __init__
      self.build_graph()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/loader.py", line 206, in build_graph
      self.applied_migrations = recorder.applied_migrations()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 61, in applied_migrations
      if self.has_table():
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 44, in has_table
      return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 255, in cursor
      return self._cursor()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 232, in _cursor
      self.ensure_connection()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
      self.connect()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
      raise dj_exc_value.with_traceback(traceback) from exc_value
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
      self.connect()
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
      self.connection = self.get_new_connection(conn_params)
    File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
      connection = Database.connect(**conn_params)
    File "/app/.heroku/python/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect
      conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
  django.db.utils.OperationalError: could not connect to server: Connection refused
      Is the server running on host "localhost" (127.0.0.1) and accepting
      TCP/IP connections on port 5432?
  </code></pre>
  
  <p>I already researched and tried tons of solutions but nothing works. I changed the localhost to * in postgres.conf file, I changed 127.0.0.1/32 into 0.0.0.0/0 in pg_hba.conf, I restarted Postgres thounsands of times and Im sure its running. I'm using Linux and virtual env. Are there even any options left?</p>