Update entrypoint.sh
- Add comments - Move argument compiler from initialize() into compile_args() - Add compile_flags() function - Add internal_error() function - Move several functions - Move log cleaning into own function - Support for Aikar's flags (better variant) - Support for G1GC and ZGC garbage collectors - Support for manipulating memory limits
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1 changed files with 136 additions and 24 deletions
158
entrypoint.sh
158
entrypoint.sh
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@ -2,6 +2,33 @@
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# Disables warning about echo not expanding escape sequences
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# shellcheck disable=SC2028
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# Used for internal errors
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function internal_error() {
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echo "-> INTERNAL ERROR: ${*}"
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exit 99
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}
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# Automatically accepts the End User License Agreement
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function accept_eula() {
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echo "eula=true" > /data/eula.txt
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}
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# Cleans /logs and /crash-reports
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function clean_logs() {
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if [ "${MCSD_CLEAN_LOGS}" == "true" ]; then
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rm -rf "/data/logs" "/data/crash-reports"
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fi
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}
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# Used by trap, shuts the server down
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function kill_server() {
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if [ -z "${CHILDPID}" ]; then
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internal_error "\$CHILDPID is unset"
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fi
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kill -SIGINT "${CHILDPID}"
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}
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# Print the MCSD banner
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function print_banner() {
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echo " ____ ____ ____ __"
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echo " /'\\_/\`\\/\\ _\`\\ /\\ _\`\\ /\\ _\`\\ /\\ \\"
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@ -12,18 +39,23 @@ function print_banner() {
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echo " \\/_/ \\/_/\\/___/ \\/_____/\\/____/ \\/_/ \\/__/ \\/____/ \\/_/ \\/___/ \\/___/ \\/____/ \\/_/\\/_/\\/____/ \\/_/"
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}
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# Initialize MCSD
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function initialize() {
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echo ":: Initializing MCSD"
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export "ARGS=--nogui "
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if [ -z "${MCSD_ENFORCE_FRESH_CACHES}" ]; then
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export "ARGS=${ARGS}--eraseCache "
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# Server arguments
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if [ ! "${MCSD_ENFORCE_FRESH_CACHES}" == "true" ] && [ ! "${MCSD_ENFORCE_FRESH_CACHES}" == "false" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_ENFORCE_FRESH_CACHES, defaulting to false"
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export "MCSD_ENFORCE_FRESH_CACHES=false"
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fi
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if [ -z "${MCSD_FORCE_UPGRADE}" ]; then
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export "ARGS=${ARGS}--forceUpgrade "
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if [ ! "${MCSD_FORCE_UPGRADE}" == "true" ] && [ ! "${MCSD_FORCE_UPGRADE}" == "false" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_FORCE_UPGRADE, defaulting to true"
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export "MCSD_FORCE_UPGRADE=true"
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fi
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if [ -z "${MCSD_SAFEMODE}" ]; then
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export "ARGS=${ARGS}--safeMode "
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if [ ! "${MCSD_SAFEMODE}" == "true" ] && [ ! "${MCSD_SAFEMODE}" == "false" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_SAFEMODE, defaulting to false"
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export "MCSD_SAFEMODE=false"
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fi
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# MCSD functionality
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if [ ! "${MCSD_AUTO_RESTART}" == "true" ] && [ ! "${MCSD_AUTO_RESTART}" == "false" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_AUTO_RESTART, defaulting to false"
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export "MCSD_AUTO_RESTART=false"
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@ -32,12 +64,32 @@ function initialize() {
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echo ":: Warning: No/Invalid value supplied to \$MCSD_CLEAN_LOGS, defaulting to false"
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export "MCSD_CLEAN_LOGS=false"
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fi
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# Memory limits
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if [ -n "${MCSD_MEMORY_MIN}" ]; then
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echo ":: Error: No memory limit supplied to \$MCSD_MEMORY_MIN"
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exit 1
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fi
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if [ -n "${MCSD_MEMORY_MAX}" ]; then
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echo ":: Error: No memory limit supplied to \$MCSD_MEMORY_MAX"
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exit 1
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fi
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# Java version
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if [ ! "${MCSD_JAVA_VERSION}" == "17" ] && [ ! "${MCSD_JAVA_VERSION}" == "11" ] && [ ! "${MCSD_JAVA_VERSION}" == "8" ]; then
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echo ":: Warning: No/Invalid java version supplied to \$MCSD_JAVA_VERSION, defaulting to java version 17"
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export "MCSD_JAVA_VERSION=17"
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fi
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# Java optimization
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if [ ! "${MCSD_OPTIMIZED_FLAGS}" == "true" ] && [ ! "${MCSD_OPTIMIZED_FLAGS}" == "false" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_OPTIMIZED_FLAGS, defaulting to true"
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export "MCSD_OPTIMIZED_FLAGS=true"
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fi
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if [ ! "${MCSD_GARBAGECOLLECTOR}" == "G1GC" ] && [ ! "${MCSD_GARBAGECOLLECTOR}" == "ZGC" ]; then
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echo ":: Warning: No/Invalid value supplied to \$MCSD_GARBAGECOLLECTOR, defaulting to G1GC"
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export "MCSD_GARBAGECOLLECTOR=G1GC"
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fi
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}
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# Check for directories and files
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function check() {
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echo ":: Checking environment"
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if [ ! -d "/data" ]; then
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@ -50,27 +102,96 @@ function check() {
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fi
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}
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function accept_eula() {
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echo "eula=true" > /data/eula.txt
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# Compile server arguments
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function compile_args() {
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echo ":: Compiling server arguments"
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export "ARGS=--nogui"
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case "${MCSD_ENFORCE_FRESH_CACHES}" in
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"true")
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export "ARGS=${ARGS} --eraseCache"
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;;
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"false") ;;
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*)
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internal_error "\$MCSD_ENFORCE_FRESH_CACHES has invalid value"
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;;
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esac
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case "${MCSD_FORCE_UPGRADE}" in
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"true")
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export "ARGS=${ARGS} --forceUpgrade"
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;;
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"false") ;;
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*)
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internal_error "\$MCSD_FORCE_UPGRADE has invalid value"
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;;
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esac
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case "${MCSD_SAFEMODE}" in
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"true")
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export "ARGS=${ARGS} --safeMode"
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;;
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"false") ;;
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*)
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internal_error "\$MCSD_SAFEMODE has invalid value"
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;;
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esac
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}
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function kill_server() {
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kill -SIGINT "$CHILDPID"
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# Compile java flags
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function compile_flags() {
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echo ":: Compiling java flags"
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export "FLAGS=-Xms${MCSD_MEMORY_MIN} -Xmx${MCSD_MEMORY_MAX}"
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case "${MCSD_OPTIMIZED_FLAGS}" in
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"true")
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export "FLAGS=${FLAGS} -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+AlwaysActAsServerClassMachine -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+UseNUMA -XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=400M -XX:NonNMethodCodeHeapSize=12M -XX:ProfiledCodeHeapSize=194M -XX:NonProfiledCodeHeapSize=194M -XX:-DontCompileHugeMethods -XX:MaxNodeLimit=240000 -XX:NodeLimitFudgeFactor=8000 -XX:+UseVectorCmov -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority -XX:ThreadPriorityPolicy=1 -XX:AllocatePrefetchStyle=3"
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;;
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"false") ;;
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*)
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internal_error "\$MCSD_OPTIMIZED_FLAGS has invalid value"
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;;
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esac
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case "${MCSD_GARBAGECOLLECTOR}" in
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"G1GC")
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export "FLAGS=${FLAGS} -XX:+UseG1GC -XX:MaxGCPauseMillis=130 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=28 -XX:G1HeapRegionSize=16M -XX:G1ReservePercent=20 -XX:G1MixedGCCountTarget=3 -XX:InitiatingHeapOccupancyPercent=10 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=0 -XX:SurvivorRatio=32 -XX:MaxTenuringThreshold=1 -XX:G1SATBBufferEnqueueingThresholdPercent=30 -XX:G1ConcMarkStepDurationMillis=5 -XX:G1ConcRSHotCardLimit=16 -XX:G1ConcRefinementServiceIntervalMillis=150"
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;;
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"ZGC")
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export "FLAGS=${FLAGS} -XX:+UseZGC -XX:AllocatePrefetchStyle=1 -XX:-ZProactive"
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;;
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*)
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internal_error "\$MCSD_GARBAGECOLLECTOR has invalid value"
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;;
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esac
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}
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# Starts the server
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function run() {
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echo ":: Starting server"
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cd /data||exit 69
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# We want to use ${ARGS} without using parenthesis
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# shellcheck disable=SC2086
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"/usr/lib/jvm/java-${MCSD_JAVA_VERSION}-openjdk/bin/java" -jar "/data/server.jar" ${ARGS} &
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"/usr/lib/jvm/java-${MCSD_JAVA_VERSION}-openjdk/bin/java" ${FLAGS} -jar "/data/server.jar" ${ARGS} &
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# Set server pid
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export "CHILDPID=${!}"
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# Setup trap
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trap kill_server SIGTERM
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trap kill_server SIGINT
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# Wait for server to end
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wait
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}
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# Need I say more?
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function main() {
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print_banner
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initialize
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check
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accept_eula
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clean_logs
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compile_args
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compile_flags
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# Run server once
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run
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# Restart server if enabled
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case "${MCSD_AUTO_RESTART}" in
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"true")
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echo ":: Restarting server after shutdown"
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echo ":: Restarting server"
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run
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;;
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"false")
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@ -78,18 +199,9 @@ function run() {
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exit 0
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;;
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*)
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echo ":: An internal error occured (run function, can't decide MCSD_AUTO_RESTART)"
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internal_error "\$MCSD_AUTO_RESTART has invalid value"
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;;
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esac
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}
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function main() {
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print_banner
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initialize
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check
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accept_eula
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if [ "${MCSD_CLEAN_LOGS}" == "true" ]; then rm -rf "/data/logs" "/data/crash-reports"; fi
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run
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}
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main
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