Hi all, I want to execute automated user clean up tasks from the host Bash. Manually, I run /var/discourse/launcher enter app rails c UserDestroyer.new(Discourse.system_user).destroy(User.find_by_username_or_email("user@example.com"), delete_posts: false) I have a long list of user names from a text file that need to be removed. Manually executing this is not reasonable. I tried to wrap the deletion command in a bash script. When executing rails c with the launcher app subcommand, the Redis connection fails: /var/discourse/launcher run app "echo \"User.find_by_username_or_email('user@example.com')\" | rails c" Failed to report error: Error connecting to Redis on localhost:6379 (Errno::EADDRNOTAVAIL) 2 Error connecting to Redis on localhost:6379 (Errno::EADDRNOTAVAIL) subscribe failed, reconnecting in 1 second. However, when I compare the environments with export between launcher enter app and launcher run app, they look pretty much identical. What am I missing? launcher run starts in / while launcher enter directly enters /var/www/discourse. Using a cd before executing rails does not help. Any hints? Thanks!

Thanks for the reply. I find that the behavior of rails with docker exec is also very odd. Manually, it works perfectly well: docker exec -it de7f5f6f649c '/bin/bash' root@discourse-app:/# rails c [1] pry(main)> User.find_by_username_or_email('myname') But when I try to execute rails c from outside the container, I get the following problems: docker exec -it de7f5f6f649c "/usr/local/bin/rails console" OCI runtime exec failed: exec failed: container_linux.go:367: starting container process caused: exec: "/usr/local/bin/rails console": stat /usr/local/bin/rails console: no such file or directory: unknown But more interesting: docker exec -it de7f5f6f649c '/bin/bash -c "/usr/local/bin/rails"' OCI runtime exec failed: exec failed: container_linux.go:367: starting container process caused: exec: "/bin/bash -c \"/usr/local/bin/rails\"": stat /bin/bash -c "/usr/local/bin/rails": no such file or directory: unknown Why is this different at all?

This is expected; you are telling docker to execute the binary /usr/local/bin/rails console in the container. That is, a single file with an embedded space. This file doesn’t exist. consider the following: ○ → docker run -i debian /bin/echo hello hello ○ → docker run -i debian '/bin/echo hello' docker: Error response from daemon: OCI runtime create failed: container_linux.go:367: starting container process caused: exec: "/bin/echo hello": stat /bin/echo hello: no such file or directory: unknown. ERRO[0000] error waiting for container: context canceled Quote the command the same way as if you were executing from inside the container: ○ → docker exec -i app rails runner 'puts "hello"' hello Using the example from the OP, this should work: docker exec -i app rails runner 'UserDestroyer.new(Discourse.system_user).destroy(User.find_by_username_or_email("user@example.com"), delete_posts: false)'

Okay, it was unexpected for me because I did not RTFM. Thanks for the fast help.

הפעלת פקודות rails מ-Bash המארח

תמיכה התקנה

pfaffman (Jay Pfaffman) 4 במאי,‏ 2021,‏ 11:11am 2

I think docker run launches a new container.

For things like that I use docker exec rather than launcher,which does a bunch of stuff you don’t need.

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הפעלת פקודות rails מ-Bash המארח

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