pg_dump postgres database from remote server when port 5432 is blocked

Question

I'm trying to pg_dump a SQL database on a remote server in our DMZ. There are 2 problems.

1. there is not a lot of space left on the remote server so the normal command run to locally backup the database pg_dump -C database > sqldatabase.sql.bak won't work due to space issues.

2. I also can't run the other version of pg_dump command to dump database from remote server to local server using:

   pg_dump -C -h remotehost -U remoteuser db_name | psql localhost -U localuser db_name

as the server is in our DMZ and port 5432 is blocked. What I'm looking to see is if it is possible to pg_dump the database and immediatly save it (ssh or some other form) as a file to a remote server. What I was trying was: pg_dump -C testdb | ssh [email protected] | > /home/admin/testdb.sql.bak

Does anyone know if what i am trying to achieve is possible?

Answer 1

You can connect with ssh to your remote server, do with the connect the pg_dump call and send the output back to stdout of local machine.

ssh user@remote_machine "pg_dump -U dbuser -h localhost -C --column-inserts" \  > backup_file_on_your_local_machine.sql 

Answer 2

let's create a backup from remote postgresql database using pg_dump:

pg_dump -h [host address] -Fc -o -U [database user] <database name> > [dump file] 

later it could be restored at the same remote server using:

sudo -u postgres pg_restore -C mydb_backup.dump 

Ex:

pg_dump -h 67.8.78.10 -Fc -o -U myuser mydb > mydb_backup.dump 

complete (all databases and objects)

pg_dumpall -U myuser -h 67.8.78.10 --clean --file=mydb_backup.dump 

restore from pg_dumpall --clean:

psql -f mydb_backup.dump postgres #it doesn't matter which db you select here 

Copied from: https://codepad.co/snippet/73eKCuLx