Why doesn’t Python app print anything when run in a detached docker container?

Finally I found a solution to see Python output when running daemonized in Docker, thanks to @ahmetalpbalkan over at GitHub. Answering it here myself for further reference : Using unbuffered output with CMD [“python”,”-u”,”main.py”] instead of CMD [“python”,”main.py”] solves the problem; you can see the output now (both, stderr and stdout) via docker logs myapp … Read more

How to run a pulled images – docker

There isnt any image with tag “latest” Try running using the tag “dab-1.1.0slim” docker run 24325.dkr.ecr.us-east-1.amazonaws.com/lm/rd/tools:dab-1.1.0slim Or else you could run the docker image using image id docker run -i -t f994713b61cb for more info on docker run command check out https://docs.docker.com/engine/reference/commandline/run/

How do I run a sql file of inserts through docker run?

to execute commands against a running container use docker exec. to copy a file (ex: dump.sql) into a container, use docker cp So your approach might look something like this: docker cp ./dump.sql pg_test:/docker-entrypoint-initdb.d/dump.sql docker exec -u postgres pg_test psql postgres postgres -f docker-entrypoint-initdb.d/dump.sql here it is in generic form: docker cp ./localfile.sql containername:/container/path/file.sql docker … Read more

Unable to find docker image locally

Well this is illogical but still sharing so future people like me don’t get stuck. The problem was that I was trying to run a docker image which doesn’t exist. I needed to build the image: docker build . -t xameeramir/cra-docker And then run it: docker run -p 8080:80 xameeramir/cra-docker

Docker container will automatically stop after “docker run -d”

The centos dockerfile has a default command bash. That means, when run in background (-d), the shell exits immediately. Update 2017 More recent versions of docker authorize to run a container both in detached mode and in foreground mode (-t, -i or -it) In that case, you don’t need any additional command and this is … Read more

What is the difference between “expose” and “publish” in Docker?

Basically, you have three options: Neither specify EXPOSE nor -p Only specify EXPOSE Specify EXPOSE and -p 1) If you specify neither EXPOSE nor -p, the service in the container will only be accessible from inside the container itself. 2) If you EXPOSE a port, the service in the container is not accessible from outside … Read more