I want to execute a command that uses commands from multiple containers.

E.g., I want to execute a backup script that used psql and pg_dump commands.

docker exec backup_container pg_dump
failed to exec: exec: "pg_dump": executable file not found in $PATH

docker run has an option --link. Is there a similar option for exec?

I want to execute a command that uses commands from multiple containers.

E.g., I want to execute a backup script that used psql and pg_dump commands.

docker exec db_backup pg_dump
failed to exec: exec: "pg_dump": executable file not found in $PATH

docker run has an option --link. Is there a similar option for exec?

To clear this up, there are 3 containers:

• my_app
• db
• db_backup

I want to use pg commands located in db from my db_backup scripts.