URI를 사용하여 postgres에 연결할 수 없지만 psql -U를 사용하여 연결할 수 있습니다.

Digital Ocean에서 간단한 웹 서버를 설정하려고 하는데 sqlalchemy를 통해 데이터베이스에 연결하기 위해 URI를 사용하는 데 문제가 있습니다.

달리기

root@maudlin:/server/http/maudlin# psql postgresql://maudlin:<password>@localhost/maudlin
psql: error: 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?

실패했지만 실행 중

root@maudlin:/server/http/maudlin# psql -U maudlin
Password for user maudlin: <password>
psql (12.7 (Ubuntu 12.7-0ubuntu0.20.04.1))
Type "help" for help.

maudlin=>

통과하다.

내가 아는 한, 내 pg_hba.conf 파일은 로컬 IP 연결을 허용합니다.

# This file is read on server startup and when the server receives a
# SIGHUP signal.  If you edit the file on a running system, you have to
# SIGHUP the server for the changes to take effect, run "pg_ctl reload",
# or execute "SELECT pg_reload_conf()".
#
# Put your actual configuration here
# ----------------------------------
#
# If you want to allow non-local connections, you need to add more
# "host" records.  In that case you will also need to make PostgreSQL
# listen on a non-local interface via the listen_addresses
# configuration parameter, or via the -i or -h command line switches.
host    maudlin         maudlin         <personal ip 1>/32         md5
host    maudlin         maudlin         <personal ip 2>/32        md5


# DO NOT DISABLE!
# If you change this first entry you will need to make sure that the
# database superuser can access the database using some other method.
# Noninteractive access to all databases is required during automatic
# maintenance (custom daily cronjobs, replication, and similar tasks).
#
# Database administrative login by Unix domain socket
local   all             postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     md5
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
local   replication     all                                     peer
host    replication     all             127.0.0.1/32            md5
host    replication     all             ::1/128                 md5

선 없음

host    all             all             127.0.0.1/32            md5

md5를 사용하여 localhost에서 비밀번호로 ipv4 연결을 허용한다는 의미입니까?

나는 외부 IP의 최상위 목록에 컴퓨터의 IP를 추가하고 이를 통해 연결을 라우팅할 수 있다고 생각하지만 그것은 나쁜 생각인 것 같습니다™

디버깅 팁이나 제안 사항이 있는 사람이 있나요?