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SERVER_RUNNER is expanded when exec'ed (#4183)

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Geoff Bourne
2026-07-19 21:35:08 -05:00
committed by GitHub
parent 1e77b81b32
commit a3bb7bff34
2 changed files with 7 additions and 4 deletions
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docs/configuration/misc-options.md
+3
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@@ -206,6 +206,9 @@ If you are using a host-attached data directory, then you can have the image set
By default, the image finishes startup by exec'ing [mc-server-runner](https://github.com/itzg/mc-server-runner) to run the Minecraft server itself. This can be replaced by setting the environment variable `SERVER_RUNNER`. The arguments passed will start with ones specific to mc-server-runner, followed by `--`, and then the actual `java -jar` arguments or equivalent server entry script, such as `run.sh` for Forge.
> [!TIP]
> The `SERVER_RUNNER` variable is expanded when passed to `exec` so that `mc-server-runner` can be wrapped by another executable that is mounted into the container.
## Enable Flare Flags
To enable the JVM flags required to fully support the [Flare profiling suite](https://blog.airplane.gg/flare), set the following variable:
scripts/start-finalExec
+4 -4
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@@ -497,7 +497,7 @@ if [[ ${TYPE} == "CURSEFORGE" && "${SERVER}" ]]; then
if isTrue "${DEBUG_EXEC}"; then
set -x
fi
exec "${SERVER_RUNNER}" ${bootstrapArgs} "${mcServerRunnerArgs[@]}" -- java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar "$(basename "${SERVER}")" "$@" $EXTRA_ARGS
exec ${SERVER_RUNNER} ${bootstrapArgs} "${mcServerRunnerArgs[@]}" -- java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar "$(basename "${SERVER}")" "$@" $EXTRA_ARGS
elif [[ ${TYPE} == "CURSEFORGE" ]]; then
mcServerRunnerArgs+=(--shell bash)
@@ -551,7 +551,7 @@ fi
JVM_ARGS=${JVM_ARGS//$'\n'/}
sed -i "s~JAVA_ARGS=.*~JAVA_ARGS=\"${JVM_ARGS}\"~" "${FTB_DIR}/variables.txt"
fi
exec "${SERVER_RUNNER}" "${mcServerRunnerArgs[@]}" -- "${finalArgs[@]}"
exec ${SERVER_RUNNER} "${mcServerRunnerArgs[@]}" -- "${finalArgs[@]}"
elif [[ $SERVER =~ run.sh ]]; then
log "Using Forge supplied run.sh script..."
echo $JVM_XX_OPTS $JVM_OPTS $expandedDOpts > user_jvm_args.txt
@@ -562,7 +562,7 @@ elif [[ $SERVER =~ run.sh ]]; then
if isTrue "${DEBUG_EXEC}"; then
set -x
fi
exec "${SERVER_RUNNER}" "${mcServerRunnerArgs[@]}" --shell bash -- "${SERVER}" $EXTRA_ARGS
exec ${SERVER_RUNNER} "${mcServerRunnerArgs[@]}" --shell bash -- "${SERVER}" $EXTRA_ARGS
else
# If we have a bootstrap.txt file... feed that in to the server stdin
if [ -f $bootstrapPath ]; then
@@ -600,5 +600,5 @@ else
set -x
fi
exec "${SERVER_RUNNER}" ${bootstrapArgs} "${mcServerRunnerArgs[@]}" -- java "${finalArgs[@]}"
exec ${SERVER_RUNNER} ${bootstrapArgs} "${mcServerRunnerArgs[@]}" -- java "${finalArgs[@]}"
fi