Auto-merging via docker-versions-create

# Conflicts:
#	README.md
#	start-minecraftFinalSetup

.circleci/config.yml

@@ -1,16 +1,17 @@
-version: 2.1
-
+version: 2
 jobs:
   minecraft_server:
     docker:
-      - image: docker:18.09.6
-    environment:
-      DOCKER_BUILDKIT: "1"
+      - image: circleci/buildpack-deps:stable
     steps:
       - checkout
-      - setup_remote_docker:
-          version: 18.09.3
-      - run: docker build --platform linux/amd64,linux/arm64,linux/arm/v7 -t itzg/minecraft-server:multiarch .
+      - setup_remote_docker
+      - run:
+          name: Build image
+          command: docker build -t itzg/minecraft-server:${CIRCLE_BRANCH} .
+#      - run:
+#          name: Build arm v7 image
+#          command: docker build -t itzg/minecraft-server:${CIRCLE_BRANCH}-arm-v7 --platform linux/arm/v7 --build-arg ARCH=armv7 .
 
 workflows:
   version: 2

Dockerfile

@@ -1,34 +1,36 @@
-FROM ubuntu:18.04
+FROM adoptopenjdk/openjdk8-openj9:alpine
 
 LABEL maintainer "itzg"
 
-RUN apt-get update \
-  && DEBIAN_FRONTEND=noninteractive \
-  apt-get install -y \
-    openjdk-8-jre-headless \
-    imagemagick \
-    gosu \
-    curl wget \
-    jq \
-    dos2unix \
-    mysql-client \
-    tzdata \
-    rsync \
-    nano \
-    && apt-get clean
+RUN apk add --no-cache -U \
+  openssl \
+  imagemagick \
+  lsof \
+  su-exec \
+  shadow \
+  bash \
+  curl iputils wget \
+  git \
+  jq \
+  mysql-client \
+  tzdata \
+  rsync \
+  nano
 
 HEALTHCHECK --start-period=1m CMD mc-monitor status --host localhost --port $SERVER_PORT
 
-RUN addgroup --gid 1000 minecraft \
-  && adduser --system --shell /bin/false --uid 1000 --ingroup minecraft --home /data minecraft
+RUN addgroup -g 1000 minecraft \
+  && adduser -Ss /bin/false -u 1000 -G minecraft -h /home/minecraft minecraft \
+  && mkdir -m 777 /data \
+  && chown minecraft:minecraft /data /home/minecraft
 
 EXPOSE 25565 25575
 
 # hook into docker BuildKit --platform support
 # see https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope
 ARG TARGETOS=linux
-ARG TARGETARCH=arm
-ARG TARGETVARIANT=v7
+ARG TARGETARCH=amd64
+ARG TARGETVARIANT=""
 
 ARG EASY_ADD_VER=0.7.1
 ADD https://github.com/itzg/easy-add/releases/download/${EASY_ADD_VER}/easy-add_${TARGETOS}_${TARGETARCH}${TARGETVARIANT} /usr/bin/easy-add

README.md

@@ -1077,6 +1077,14 @@ via a `JVM_XX_OPTS` environment variable.
 For some cases, if e.g. after removing mods, it could be necessary to startup minecraft with an additional `-D` parameter like `-Dfml.queryResult=confirm`. To address this you can use the environment variable `JVM_DD_OPTS`, which builds the params from a given list of values separated by space, but without the `-D` prefix. To make things running under systems (e.g. Plesk), which doesn't allow `=` inside values, a `:` (colon) could be used instead. The upper example would look like this:
 `JVM_DD_OPTS=fml.queryResult:confirm`, and will be converted to `-Dfml.queryResult=confirm`.
 
+The container uses [OpenJ9](https://www.eclipse.org/openj9/docs) and a couple of J9 options are
+simplified by environment variables:
+
+- `-e TUNE_VIRTUALIZED=TRUE` : enables the option to 
+  [optimize for virtualized environments](https://www.eclipse.org/openj9/docs/xtunevirtualized/)
+- `-e TUNE_NURSERY_SIZES=TRUE` : configures nursery sizes where the initial size is 50%
+  of the `MAX_MEMORY` and the max size is 80%.
+
 ### Enable Remote JMX for Profiling
 
 To enable remote JMX, such as for profiling with VisualVM or JMC, add the environment variable `ENABLE_JMX=true` and add a port forwarding of TCP port 7091, such as:

start

@@ -40,7 +40,7 @@ if [ $(id -u) = 0 ]; then
     echo 'hosts: files dns' > /etc/nsswitch.conf
   fi
 
-  exec gosu ${runAsUser}:${runAsGroup} /start-configuration $@
+  exec su-exec ${runAsUser}:${runAsGroup} /start-configuration $@
 else
   exec /start-configuration $@
 fi

start-configuration

@@ -7,8 +7,6 @@ shopt -s nullglob
 #umask 002
 export HOME=/data
 
-log "Running as uid=$(id -u) gid=$(id -g) with /data as '$(ls -lnd /data)'"
-
 if [ ! -e /data/eula.txt ]; then
   EULA="${EULA,,}"
   if [ "$EULA" != "true" ]; then
@@ -30,6 +28,15 @@ if [ ! -e /data/eula.txt ]; then
 fi
 
 
+log "Running as uid=$(id -u) gid=$(id -g) with /data as '$(ls -lnd /data)'"
+
+if ! touch /data/.verify_access; then
+  log "ERROR: /data doesn't seem to be writable. Please make sure attached directory is writable by uid=$(id -u)"
+  exit 2
+fi
+
+rm /data/.verify_access || true
+
 if [[ $PROXY ]]; then
     export http_proxy="$PROXY"
     export https_proxy="$PROXY"

start-minecraftFinalSetup

@@ -100,6 +100,23 @@ if [ -n "$JVM_DD_OPTS" ]; then
       done
 fi
 
+if isTrue ${TUNE_VIRTUALIZED}; then
+  JVM_XX_OPTS="${JVM_XX_OPTS} -Xtune:virtualized"
+fi
+
+if isTrue ${TUNE_NURSERY_SIZES}; then
+  case ${MAX_MEMORY^^} in
+    *G)
+      MAX_MEMORY_MB=$(( ${MAX_MEMORY%?} * 1024 )) ;;
+    *M)
+      MAX_MEMORY_MB=${MAX_MEMORY%?} ;;
+  esac
+
+  NURSERY_MINIMUM=$(( ${MAX_MEMORY_MB} / 2 ))
+  NURSERY_MAXIMUM=$(( ${MAX_MEMORY_MB} * 4/5 ))
+  JVM_XX_OPTS="${JVM_XX_OPTS} -Xmns${NURSERY_MINIMUM}M -Xmnx${NURSERY_MAXIMUM}M"
+fi
+
 if isTrue ${ENABLE_JMX}; then
   : ${JMX_HOST:=0.0.0.0}
   : ${JMX_PORT:=7091}