When I try to connect to my docker container (got from https://github.com/gitcoinco/passport-scorer), it outputs weird symbols to console:
$ docker exec -t passport-scorer_postgres_1 sh
/ # ^[[45;5R
Pressing ENTER does not work as expected for sh: it just moves the cursor to beginning of the next line (new sh prompt is not produced).
If I type ls and press ENTER in this prompt (both directly after this or after first removing ^[[45;5R by Backspace), the cursor is just moved to the next line (ls is not executed).
However, this works as expected:
docker exec -t passport-scorer_postgres_1 ls
Help to connect to my container.
I use Gnome Terminal.
$ echo $TERM
xterm-256color
You have to use the -i flag as well (combined -it).
As Docker official documentation says:
--interactive -i Keep STDIN open even if not attached
--tty -t Allocate a pseudo-TTY
Example with detailed comments:
# It's not working as you expect because the STDIN is not open (-i)
# so the container doesn't handle the written things from terminal
# (Only the direct command is executed inside the container).
# -------------
>>> docker exec -t 27a4dcfe37df sh
#
ls
# It's working if I pass directly the "ls" command
# (Because the STDIN is not needed for further operations,
# just run the provided command and that's it).
# -------------
>>> docker exec -t 27a4dcfe37df ls.
bin boot dev etc home lib media mnt opt proc root run sbin srv sys tmp usr var
# It's working as you expect.
# The STDIN is kept open (-i) so the user can operate in the terminal
# (inside container). In other words, the container can handle the
# provided details from STDIN.
# -------------
>>> docker exec -it 27a4dcfe37df sh
# ls
bin boot dev etc home lib media mnt opt proc root run sbin srv sys tmp usr var
#