That 2GB limit you see is the total memory of the VM (virtual machine) on which docker runs. If you are using Docker Desktop you can easily increase it from the Whale 🐳 icon in the task bar, then go to Preferences -> Advanced: But if you are using VirtualBox behind, open VirtualBox, Select and … Read more
If you are using a Dockerfile, try: ENTRYPOINT [“tail”, “-f”, “/dev/null”] (Obviously this is for dev purposes only, you shouldn’t need to keep a container alive unless it’s running a process eg. nginx…)
To see the file size of your containers, you can use the –size argument of docker ps: docker ps –size
docker-compose up $ docker-compose up -d –no-deps –build <service_name> –no-deps – Don’t start linked services. –build – Build images before starting containers.
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
For all platforms Docker v 20.10 and above (since December 14th 2020) On Linux, add –add-host=host.docker.internal:host-gateway to your Docker command to enable this feature. (See below for Docker Compose configuration.) Use your internal IP address or connect to the special DNS name host.docker.internal which will resolve to the internal IP address used by the host. … Read more
Docker 1.9.0 and above Use volume API docker volume create –name hello docker run -d -v hello:/container/path/for/volume container_image my_command This means that the data-only container pattern must be abandoned in favour of the new volumes. Actually the volume API is only a better way to achieve what was the data-container pattern. If you create a … Read more
An instance of an image is called a container. You have an image, which is a set of layers as you describe. If you start this image, you have a running container of this image. You can have many running containers of the same image. You can see all your images with docker images whereas … Read more
docker attach will let you connect to your Docker container, but this isn’t really the same thing as ssh. If your container is running a webserver, for example, docker attach will probably connect you to the stdout of the web server process. It won’t necessarily give you a shell. The docker exec command is probably … Read more
The cp command can be used to copy files. One specific file can be copied TO the container like: docker cp foo.txt container_id:/foo.txt One specific file can be copied FROM the container like: docker cp container_id:/foo.txt foo.txt For emphasis, container_id is a container ID, not an image ID. (Use docker ps to view listing which … Read more