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README.md

@@ -1043,6 +1043,12 @@ 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`.
 
+### 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:
+
+    -e ENABLE_JMX=true -p 7091:7091
+
 ### HTTP Proxy
 
 You may configure the use of an HTTP/HTTPS proxy by passing the proxy's URL via the `PROXY`

start-minecraftFinalSetup

@@ -96,6 +96,21 @@ if [ -n "$JVM_DD_OPTS" ]; then
       done
 fi
 
+if isTrue ${ENABLE_JMX}; then
+  : ${JMX_HOST:=0.0.0.0}
+  : ${JMX_PORT:=7091}
+  JVM_OPTS="${JVM_OPTS}
+  -Dcom.sun.management.jmxremote.local.only=false
+  -Dcom.sun.management.jmxremote.port=${JMX_PORT}
+  -Dcom.sun.management.jmxremote.rmi.port=${JMX_PORT}
+  -Dcom.sun.management.jmxremote.authenticate=false
+  -Dcom.sun.management.jmxremote.ssl=false
+  -Dcom.sun.management.jmxremote.host=${JMX_HOST}
+  -Djava.rmi.server.hostname=${JMX_HOST}"
+
+  log "JMX is enabled. Make sure you have port forwarding for ${JMX_PORT}"
+fi
+
 mcServerRunnerArgs="--stop-duration 60s"
 
 if [[ ${TYPE} == "FEED-THE-BEAST" ]]; then