无法连接到 Ubuntu 18.04 服务器上的 PostgreSQL db

Question

Having a time trying to connect to a PostgreSQL database on Ubuntu 18.04 server.

Here is my: postgresql.conf file:

port=5432
listen_addresses='*'

pg_hba.conf:

host  all  all 0.0.0.0/0 md5

firewall is currently disabled

here is the output when I did the command (saw in another thread to do this...): sudo netstat -ltpn

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      608/systemd-resolve 
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      842/sshd            
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      2922/postgres       
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      1055/master         
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      867/nginx: master p 
tcp6       0      0 :::22                   :::*                    LISTEN      842/sshd            
tcp6       0      0 :::25                   :::*                    LISTEN      1055/master         
tcp6       0      0 :::80                   :::*                    LISTEN 

I have restarted postgresql each when making a change using the command: sudo service postgresql restart .

I have tried to access the db using the python library psycopg2 on macOS and getting this error

could not connect to server: Connection refused
Is the server running on host "<ip_address>" and accepting
TCP/IP connections on port 5432?

What am I missing?

Answer 1

From the netstat output it is obvious that you didn't restart PostgreSQL after changing listen_addresses .