I am getting this message nc command is missing and by doing some R&D, I got to know that in order to resolve this, (I think) I need to run below command in MySQL container in docker-compose

RUN apt-get -q update && apt-get -qy install netcat

But the issue is I don't have it's docker file else I could have written this command in docker file and might have called docker file from docker-compose

Does anyone have any idea how can I run this command from docker-compose?

CodePudding user response：

You could build and publish your own container image if you wanted with a dockerfile like this

FROM mysql:8
RUN apt-get -q update && apt-get -qy install netcat

and build it like docker build . -t user123/mysql:8

and push it like docker push user123/mysql:8

then switch your docker compose to use your custom container.

if you just need to pop in temporarily to install netcat, you can do that by doing

docker exec -it --user=root ContainerHashOrName /bin/bash where ContainerHashOrName can be retrieved from docker ps then just run your commands like you would on any other distro. Just be aware that you are only making changes to the specific instance of a container and that any rescheduling will bring up a different instance of the container.

CodePudding user response：

You can use "build" option of compose file, https://docs.docker.com/compose/compose-file/compose-file-v3/#build and use your own Dockerfile starts with FROM mysql:8 and then install all additional stuff you need.