Remote execute of check_postgres.pl for disk_usage flags data_dir as invalid

[ItsBoris1]

Hey,
i am testing out the check_postgres script on which options i can use, so that i can use them in my monitoring system icinga.

Right know I want to have some general information which is going to be feed to Icinga such as disk size, connection, hitratio etc.

When i try to use the disk_usage option like this
./check_postgres.pl --host=<ipadress> --port=5432 --dbuser=icinga --dbpass=<password> --action=disk_space --warning='80%' --db=test

I receive the following error
POSTGRES_DISK_SPACE UNKNOWN: DB "test" (host:<ipaddress>) Could not find data directory "/var/lib/postgresql/13/main" | time=0.16s

When I include the option assume-prod and adding the data dir's location like this
./check_postgres.pl --host=<ipaddress> --port=5432 --dbuser=icinga --dbpass=<pass> --action=disk_space --warning='80%' --db=test --datadir /var/lib/postgresql/13/main --assume-prod

I get this error
ERROR: Invalid data_directory: "/var/lib/postgresql/13/main"
Could it be, that the script is trying to find the data directory on the local system and because of that is throwing the error "invalid data_directory", because the dir exists on the remote system

[ItsBoris1]

Edit:
Just tried it out and making a dir "/var/lib/postgresql/13/main" inside the local system executing the perl script and after executing it with ./check_postgres.pl --host=<ipaddress> --port=5432 --dbuser=icinga --dbpass=<pass> --action=disk_space --warning='80%' --db=test --datadir /var/lib/postgresql/13/main --assume-prod

I get
ERROR: Could not find a suitable pg_controldata executable

in this case shouldnt the script check the targeted system through the ip or this option disk_usage is only to be used locally

Locally meaning i have the script on my system that i want to check