postgresql does not seem to respect the pg_hba.conf config - how can I diagnose this? I have the following pg_hba.conf:
# TYPE  DATABASE        USER            ADDRESS                 METHOD

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


With the above I assume host    all             all             127.0.0.1/32            trust would allow TCP connections from localhost. However this does not seem to be the case
[root@XenonKiloCranberry:~]# psql -U postgres
psql (11.7)
Type &quot;help&quot; for help.

postgres=# \q

[root@XenonKiloCranberry:~]# psql -U postgres -h 127.0.0.1
psql: FATAL:  no pg_hba.conf entry for host &quot;127.0.0.1&quot;, user &quot;postgres&quot;, database &quot;postgres&quot;, SSL off

Where am I going wrong?
Output of select * from pg_hba_file_rules:
line_number | type  | database | user_name | address |                 netmask                 | auth_method | options | error 
-------------+-------+----------+-----------+---------+-----------------------------------------+-------------+---------+-------
           1 | local | {all}    | {all}     |         |                                         | trust       |         | 
           2 | host  | {all}    | {all}     | ::1     | ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff | trust       |         | 
(2 rows)
If you have restarted the database and the contents of the view pg_hba_file_rules doesn't match your pg_hba.conf file, then you probably have more than one such file, and edited the one which is not being used.  If you can connect via another means, you can use show hba_file; to get PostgreSQL to tell you which file is the one that is being used.