kris/minecraft
kris/minecraft
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Update the Dockerfile for readability

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- Make the download/verify section more readable
- Add JVM_OPTS to CMD
- Use ARG EULA during the build
- Update build instructions in README
This commit is contained in:
Kris Lamoureux 2024-05-10 03:19:58 -04:00
parent 08fc5d16c8
commit 0c19cc1913
Signed by: kris
GPG Key ID: 3EDA9C3441EDA925
2 changed files with 21 additions and 15 deletions
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32
Dockerfile
View File

@ -1,9 +1,9 @@
FROM debian:stable
ENV DEBIAN_FRONTEND=noninteractive
ENV VERSION=1.20.1
ENV JVM_OPTS="-Xmx2G -Xms1G"
ENV EULA=false
ENV DEBIAN_FRONTEND=noninteractive
ARG EULA=false
# Install dependencies
RUN apt-get update && \
@ -21,17 +21,21 @@ RUN mkdir /app && \
# Download and verify sha1sum for server.jar
WORKDIR /app
RUN curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \
| jq -r --arg id "$VERSION" '.versions[] | select(.id == $id) | .url' | xargs curl -s \
| jq -r '.downloads.server' | tee "/tmp/dl.json" | jq -r '.url' | xargs curl -s -o server.jar \
&& sha1sum server.jar | awk '{print $1}' | xargs -I{} sh -c '[ "{}" = "$(jq -r .sha1 /tmp/dl.json)" ] && \
(echo "Checksum matches" && rm /tmp/dl.json) || (echo "Checksum failed" && exit 1)' \
&& chown minecraft:minecraft server.jar
USER minecraft
RUN set -ux; \
# Get server.jar based on $VERSION
curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \
| jq -r --arg id "$VERSION" '.versions[] | select(.id == $id) | .url' | xargs curl -s \
| jq -r '.downloads.server' | tee "/tmp/dl.json" | jq -r '.url' | xargs curl -s -o server.jar && \
java -jar server.jar --initSettings --nogui && \
sed -i "s/^eula=.*\$/eula=$EULA/" eula.txt && \
# Get SHA1 hash of server.jar and compare
SHA1="$(sha1sum server.jar | awk '{print $1}')" && \
EXPECTED="$(jq -r .sha1 /tmp/dl.json)"; rm /tmp/dl.json && \
if [ ! "$SHA1" = "$EXPECTED" ]; then \
echo "[ERROR] SHA1=\"$SHA1\" expected \"$EXPECTED\""; \
exit 1; \
fi
EXPOSE 25565
# temp
RUN echo 'eula=true' > eula.txt
CMD ["java", "-jar", "server.jar", "nogui"]
CMD ["java", "-jar", "server.jar", "$JVM_OPTS", "--nogui"]

4
README.md
View File

@ -4,7 +4,9 @@ This Dockerfile sets up a Minecraft server based on Debian stable. WIP.
To test image creation, run:
```
docker build . -t minecraft:vanilla; docker run -d minecraft:vanilla
docker build --build-arg EULA=true -t minecraft . && \
docker run -d --name minecraft --rm minecraft && \
docker logs -f minecraft
```
## Copyright and License