Issue with netcat-tarditional and docker

Question

I have a bash script in my docker container that use netcat to receive a datagram from a raspberry with this command:

msg_port=60001
nc -k -u -l -p $msg_port >> /data/hydro/info.txt &

Now, i have tested this script on my computer (outside of container) and it works.

But when i run it with a container, that use netcat-traditional, in the first run it works perfectly. But if i restart the script in the raspberry without restarting the container, it seems to no longer receive data, even if it remains listening.

I think the problem is that the netcat command is unable to accept new connections, althought -k option should be used to avoid this problem. I repeat that, outside of the container, everything works

What are the exact version of nc on the host machine where the script has been tested and in the container? — Ortomala Lokni
– Ortomala Lokni, Commented Dec 26, 2024 at 23:09
@OrtomalaLokni version of nc on the host machine is 1.226-1 (netcat-OpenBsd) and version in the container is 1.10-48 (netcat-traditional) — rollback
– rollback, Commented Dec 27, 2024 at 11:33
You should try to use nc 1.226-1 (netcat-OpenBsd) in the container. — Ortomala Lokni
– Ortomala Lokni, Commented Dec 27, 2024 at 16:30
I had already tried, but ran into this problem package netcat has no installation candidate and had to switch to netcat-traditional — rollback
– rollback, Commented Dec 27, 2024 at 20:36

rollback · Accepted Answer · 2024-12-27 21:58:18Z

0

I solved the problem. At the beginning I had written apt install netcat in the dockerfile, so I had come across this problem package netcat has no installation whose solution was to specify the netcat package. due to my forgetfulness, instead of writing apt install netcat-openbsd I had written apt install netcat-traditional, thinking that that package was installed on the host (where the command worked)

edited Dec 27, 2024 at 21:58

answered Dec 27, 2024 at 21:01

rollback

211 silver badge2 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Issue with netcat-tarditional and docker

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related