could not connect to postgresql server django lightsail

问题

I keep running into the problem of not being able to connect to the database:

django.db.utils.OperationalError: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/opt/bitnami/postgresql/.s.PGSQL.5432/.s.PGSQL.5432"?

its my list of databases:

                                  List of databases
    Name    |  Owner   | Encoding |   Collate   |    Ctype    |   Access privileges   
------------+----------+----------+-------------+-------------+-----------------------
 postgres   | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +
            |          |          |             |             | postgres=CTc/postgres
 template1  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres          +
            |          |          |             |             | postgres=CTc/postgres
(3 rows)

and its the postgres config section of settings.py:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'postgres',
        'HOST': '/opt/bitnami/postgresql/.s.PGSQL.5432',
        'PORT': '5432',
        'USER': 'postgres',
        'PASSWORD': 'mypass'
    }
}

I also tried answers to these two questions

Can't connect to Postgres database with Bitnami Django stack
Can't connect the postgreSQL with psycopg2 but none of them helped.

here is pip list:

 psycopg2-binary==2.8.6

my debug mode is false:

DEBUG = False

and in allowed hosts I have my private IP:

 ALLOWED_HOSTS = ['XXX.XXX.XXX.XXX']

回答1:

There is a confusion in Bitnami documentation. The file traceback says it can't find the file: .s.PGSQL.5432 This file is actually located in /tmp folder. (don't ask)

If you change your settings.py to have a /tmp folder as a Host it will work:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'postgres',
        # 'HOST': '/opt/bitnami/postgresql',
        'HOST': '/tmp/',
        'PORT': '5432',
        'USER': 'postgres',
        'PASSWORD': '1234'
    }
}

Another option is to create a symlink:

sudo ln -s /tmp/.s.PGSQL.5432 /opt/bitnami/postgresql/.s.PGSQL.5432

but I haven't tested it.

来源：https://stackoverflow.com/questions/64860073/could-not-connect-to-postgresql-server-django-lightsail

标签

postgresql

psycopg2

amazon-lightsail