Im using the raspi4 with 4GB, and im stuck with this at this point.

Thanks in advice!

Some info about my errors:

Code:
root@kali:~# service postgresql status
● postgresql.service - PostgreSQL RDBMS
     Loaded: loaded (/lib/systemd/system/postgresql.service; disabled; vendor preset: disabled)
     Active: active (exited) since Sat 2020-07-04 05:55:50 UTC; 44min ago
    Process: 2172 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
    Process: 2723 ExecReload=/bin/true (code=exited, status=0/SUCCESS)
   Main PID: 2172 (code=exited, status=0/SUCCESS)

Jul 04 05:55:50 kali systemd[1]: Starting PostgreSQL RDBMS...
Jul 04 05:55:50 kali systemd[1]: Finished PostgreSQL RDBMS.
Jul 04 06:08:01 kali systemd[1]: Reloading PostgreSQL RDBMS.
Jul 04 06:08:01 kali systemd[1]: Reloaded PostgreSQL RDBMS.

Code:
msf5 > db_status [*] postgresql selected, no connection

Code:
root@kali:~# msfdb reinit
[i] Database already started
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
[+] Deleting configuration file /usr/share/metasploit-framework/config/database.yml
[+] Stopping database
[+] Starting database
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
[+] Creating database user 'msf'
createuser: error: could not connect to database postgres: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
[+] Creating databases 'msf'
createdb: error: could not connect to database template1: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
psql: error: could not connect to server: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
[+] Creating databases 'msf_test'
createdb: error: could not connect to database template1: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
[+] Creating configuration file '/usr/share/metasploit-framework/config/database.yml'
[+] Creating initial database schema
rake aborted!
PG::ConnectionBad: could not connect to server: Connection refused
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
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?
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `initialize'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `new'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `connect'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:242:in `initialize'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `new'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `postgresql_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/connection_handling.rb:87:in `connection'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/migration.rb:941:in `initialize'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/migration.rb:823:in `new'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/migration.rb:823:in `up'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/migration.rb:801:in `migrate'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/tasks/database_tasks.rb:139:in `migrate'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/activerecord-4.2.11.3/lib/active_record/railties/databases.rake:44:in `block (2 levels) in <top (required)>'
/usr/share/metasploit-framework/vendor/bundle/ruby/2.7.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

Code:
root@kali:~# msfdb status
● postgresql.service - PostgreSQL RDBMS
     Loaded: loaded (/lib/systemd/system/postgresql.service; disabled; vendor preset: disabled)
     Active: active (exited) since Sat 2020-07-04 06:43:49 UTC; 48s ago
    Process: 4035 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
   Main PID: 4035 (code=exited, status=0/SUCCESS)

Jul 04 06:43:49 kali systemd[1]: Starting PostgreSQL RDBMS...
Jul 04 06:43:49 kali systemd[1]: Finished PostgreSQL RDBMS.
[i] No network service running
[+] Detected configuration file (/usr/share/metasploit-framework/config/database.yml)