2
GB runtime memory,allocated from the total available memory on your machine. To increase the RAM, set this to a higher number. To decrease it, lower the number.file not found
or cannot start service
errors at runtime. See Volume mounting requires shared folders for Linux containers.+
and navigate to the directory you want to add.-v
) feature.test
and Test
, while on Windows these filenames would actually refer to the same underlying file. This can lead to problems where an app works correctly on a developer Windows machine (where the file contents are shared) but fails when run in Linux in production (where the file contents are distinct). To avoid this, Docker Desktop insists that all shared files are accessed as their original case. Therefore if a file is created called test
, it must be opened as test
. Attempts to open Test
will fail with “No such file or directory”. Similarly once a file called test
is created, attempts to create a second file called Test
will fail.http://proxy.example.com
, Docker uses this proxy when pulling containers.docker
commands that pull images from Docker Hub that are not alreadydownloaded, such as a first time run of docker run hello-world
. If youencounter this, reset the DNS server to use the Google DNS fixed address:8.8.8.8
. For more information, seeNetworking issues in Troubleshooting.wsl --set-default <distro name>
. (For example, to set Ubuntu as your default WSL distro, run wsl --set-default ubuntu
).docker version
to verify whether you have enabled experimental features. Experimental modeis listed under Server
data. If Experimental
is true
, then Docker isrunning in experimental mode, as shown here:localhost
and published ports~/.docker/certs.d/<MyRegistry>:<Port>/client.cert
and~/.docker/certs.d/<MyRegistry>:<Port>/client.key
. You do not need to push your certificates with git
commands.~/.docker/certs.d
folder on your Windows system to the /etc/docker/certs.d
directory on Moby (the Docker Desktop virtual machine running on Hyper-V).~/.docker/certs.d
directory in order for the changes to take effect.docker run
that attempt to pull from the registryproduce error messages on the command line, as well as on the registry.package.json
file that describes your app and its dependencies:package.json
file, run npm install
. If you are using npm
version 5 or later, this will generate a package-lock.json
file which will be copiedto your Docker image.server.js
file that defines a web app using theExpress.js framework:Dockerfile
:Dockerfile
in your favorite text editor14
of node
available from the Docker Hub:npm
binary. Pleasenote that if you are using npm
version 4 or earlier a package-lock.json
file will not be generated.package.json
file. This allows us to take advantage of cached Dockerlayers. bitJudo has a good explanation of thishere.Furthermore, the npm ci
command, specified in the comments, helps provide faster, reliable, reproducible builds for production environments.You can read more about this here.COPY
instruction:8080
so you'll use the EXPOSE
instruction to have itmapped by the docker
daemon:CMD
which definesyour runtime. Here we will use node server.js
to start your server:Dockerfile
should now look like this:.dockerignore
file in the same directory as your Dockerfile
with following content:Dockerfile
and run the following command tobuild the Docker image. The -t
flag lets you tag your image so it's easier tofind later using the docker images
command:-d
runs the container in detached mode, leaving thecontainer running in the background. The -p
flag redirects a public port to aprivate port inside the container. Run the image you previously built:exec
command:8080
port inside of the container tothe port 49160
on your machine.curl
(install if needed via: sudo apt-getinstall curl
):