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unable to allow TCP connection to PostgreSQL from Draco (Apache Nifi)

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xpanta

I am trying to use NGSIToPostgreSQL processor to stream data to PostgreSQL-9.6 (on CentOS 7.4). But I keep getting this:

Cannot create PoolableConnectionFactory (Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.)

I prepared firewall to accept TCP connections on 5432 port:

sudo firewall-cmd --zone=public --add-port=5432/tcp --permanent

and

sudo firewall-cmd --reload

Then I updated PostgreSQL files:

pg_hba.conf like this:

host    all             all             127.0.0.1/32            trust

and postgresql.conf like this:

listen_addresses='*'

and finally restart the server like this:

sudo service postgresql-9.6.service restart #restart_psql

However I still get this error.

Draco (Apache NiFi) runs through Docker if that means something.

Also

When I try to curl I get this:

$ curl -X GET 127.0.0.1:5432

$ curl: (52) Empty reply from server

Which I guess it means that the server is not responding.

What am I missing?

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