ChainGuard images were not loading Microsoft fonts but were loading in Alpine:
Alpine Dockerfile
FROM alpine:latest
USER root
RUN apk add tzdata
RUN apk --update add fontconfig msttcorefonts-installer
RUN apk add fontconfig
RUN update-ms-fonts
RUN fc-cache -f
RUN fc-list | wc -l
Build command
docker build -t alpine_fonts_test .
Output
Results from alpine_fonts_test build, with 55 fonts installed.
Step 8/8 : RUN fc-list | wc -l
---> Running in 2b84ca81068c
55
55 fonts are installed.
Chainguard Dockerfile
FROM alpine:latest
USER root
RUN apk add tzdata
RUN apk --update add fontconfig msttcorefonts-installer
RUN apk add fontconfig
RUN update-ms-fonts
RUN fc-cache -f
RUN fc-list | wc -l
Build command
docker build -t chainguard_fonts_test .
Output
Results from chainguard_fonts_test build, with 0 fonts installed.
Step 8/8 : RUN fc-list | wc -l
---> Running in a8013bd322c1
0
Identifying differences:
Locate the docker image
$ docker image ls | grep chainguard_fonts_test
chainguard_fonts_test latest 010b22e0d8cc 6 minutes ago 169MB
Start and drop into a shell:
$ docker run -it --entrypoint=/bin/bash --user 0:0 010b22e0d8cc
With this image now running as a container, you can extract files from the filesystem but you need to identify the running container id:
$ docker container ls | grep 010b22e0d8cc | awk '{ print $1}'
a5f5de6033fa
Copy the file off of the image:
docker cp a5f5de6033fa:/usr/bin/update-ms-fonts ./Chain_guard_script
Successfully copied 10.2kB to /folder/youre/in/Chain_guard_script
Start the alpine image you created earlier as a container:
docker run -it --entrypoint=/bin/sh 1b45d6d559e0
Identify the container id:
$ docker container ls | grep 1b45d6d559e0 | awk '{ print $1}'
Copy the file from Alpine image to your local system:
docker cp 210ab15be542:/usr/bin/update-ms-fonts ./Alpine_script`
Successfully copied 10.2kB to /folder/youre/in/Alpine_script
Diff the files:
➜ diff Chain_guard_script Alpine_script
193a194
> mv $ttf $FONTDIR/$longname
1 additional line in script on the Alpine image.
Add the line into the Chainguard script and test:
update-ms-fonts
fc-list | wc -l
55
