BlueFox/docker-cmatrix
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Author SHA1 Message Date
BlueFox
8ed1e1b2c2 Update README.md 2024-09-21 16:19:57 +00:00
BlueFox
971bab4c2f Added multiplatform build and push instructions 2024-09-21 16:13:28 +00:00
BlueFox
db7dd90c84 Dockerfile: Made the resulting image more friendly by using ENTRYPOINT 2024-09-21 17:38:03 +02:00
BlueFox
d0e251de94 Dockerfile: Added user for security reasons 2024-09-21 17:28:05 +02:00
2 changed files with 42 additions and 4 deletions
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8
Dockerfile
View File

@@ -19,7 +19,11 @@ FROM alpine
LABEL org.opencontainers.image.authors="bluefox@privacynerd.de"
RUN apk update --no-cache && apk add --no-cache ncurses-terminfo-base
RUN apk update --no-cache && \
apk add --no-cache ncurses-terminfo-base && \
adduser -g "cmatrix" -s /usr/sbin/nologin -D -H cmatrix
COPY --from=cmatrixbuildimage /cmatrix/cmatrix /cmatrix
CMD ["./cmatrix"]
USER cmatrix
ENTRYPOINT ["./cmatrix"]
CMD ["-akb", "-u 3"]

38
README.md
View File

@@ -1,6 +1,6 @@
# docker-cmatrix
A simple docker image I used to teach me the basics of docker images and how to build them.
A simple alpine-based docker image I used to teach me the basics of docker images and how to build them.
## Build the container
@@ -9,4 +9,38 @@ To build the container to an image called "cmatrix-demo", run
```sh
docker build -t cmatrix-demo .
```
```
## Multi-platform builds
To do a build for multiple architectures, run:
```sh
sudo docker buildx create --name buildx-multi-arch
sudo docker buildx use buildx-multi-arch
```
Then, to build it (e.g. for amd64 and arm64/v8):
```sh
sudo docker buildx build --no-cache --platform linux/amd64,linux/arm64/v8 -t cmatrix-demo .
```
**Please note that this will not load the images into the local image store (because it's obviously hard to run images built for the wrong architecture)! For uploading this to a container registry, see below.**
## Pushing the container to a registry
As you've got everything working, maybe it's time to share the work! This can be done by uploading the built image to a docker container registry, e.g. [Docker Hub](https://hub.docker.com/).
First, sign into your Docker Hub account with your local docker installation (to create an account head to [https://app.docker.com/signup](https://app.docker.com/signup) in your favourite browser). The procedure is self-explaining:
```sh
docker login
```
To build and push the image directly to Docker Hub, use the following command (differs from the one above only in the --push option):
```sh
sudo docker buildx build --no-cache --platform linux/amd64,linux/arm64/v8 -t <USER>/cmatrix-demo . --push
```