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종료, 상태 등 명령어 송신 기능 #1

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icksishu@gmail.com 6 days ago
commit dd6bada7ea
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3
.gitattributes vendored
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/gradlew text eol=lf
*.bat text eol=crlf
*.jar binary

37
.gitignore vendored
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HELP.md
.gradle
build/
!gradle/wrapper/gradle-wrapper.jar
!**/src/main/**/build/
!**/src/test/**/build/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
bin/
!**/src/main/**/bin/
!**/src/test/**/bin/
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
out/
!**/src/main/**/out/
!**/src/test/**/out/
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
### VS Code ###
.vscode/

14
HELP.md
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# Getting Started
### Reference Documentation
For further reference, please consider the following sections:
* [Official Gradle documentation](https://docs.gradle.org)
* [Spring Boot Gradle Plugin Reference Guide](https://docs.spring.io/spring-boot/3.5.9/gradle-plugin)
* [Create an OCI image](https://docs.spring.io/spring-boot/3.5.9/gradle-plugin/packaging-oci-image.html)
### Additional Links
These additional references should also help you:
* [Gradle Build Scans – insights for your project's build](https://scans.gradle.com#gradle)

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build.gradle
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plugins {
id 'java'
id 'org.springframework.boot' version '3.4.3'
id 'io.spring.dependency-management' version '1.1.7'
}
group = 'com.bsmlab.dfx'
version = '0.0.1-SNAPSHOT'
description = 'DFX Command'
java {
toolchain {
languageVersion = JavaLanguageVersion.of(17)
}
}
bootRun {
// 실행시 jvm에 -D 옵션을 적용하기 위하여 설정
systemProperties System.properties
}
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}
tasks.named('test') {
useJUnitPlatform()
}

251
gradlew vendored
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#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
# This is normally unused
# shellcheck disable=SC2034
APP_BASE_NAME=${0##*/}
# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH="\\\"\\\""
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
if ! command -v java >/dev/null 2>&1
then
die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Collect all arguments for the java command:
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
# and any embedded shellness will be escaped.
# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
# treated as '${Hostname}' itself on the command line.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
-jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
"$@"
# Stop when "xargs" is not available.
if ! command -v xargs >/dev/null 2>&1
then
die "xargs is not available"
fi
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

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gradlew.bat vendored
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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@rem SPDX-License-Identifier: Apache-2.0
@rem
@if "%DEBUG%"=="" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%"=="" set DIRNAME=.
@rem This is normally unused
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if %ERRORLEVEL% equ 0 goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:execute
@rem Setup the command line
set CLASSPATH=
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
:end
@rem End local scope for the variables with windows NT shell
if %ERRORLEVEL% equ 0 goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
set EXIT_CODE=%ERRORLEVEL%
if %EXIT_CODE% equ 0 set EXIT_CODE=1
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
exit /b %EXIT_CODE%
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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settings.gradle
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rootProject.name = 'dfxcmd'

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src/docs/script/dfxcmd.sh
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#!/bin/sh
AGENT_HOME=/home/dfxagent/agent
JAVA_HOME=$JAVA_HOME
java -XX:TieredStopAtLevel=1 -jar $AGENT_HOME/lib/dfxagent.jar -Xms2048m -Xmx8192m --setting.file=$AGENT_HOME/conf/settings.json &
#JDK: Red Hat OpenJDK 17.0.11+9 (LTS), OS: Rocky Linux 8.10 사용 중 하기의 오류 발생 -> -XX:TieredStopAtLevel=1 추가 (C1만 사용하여 C2 비활성화)
#크래시 시그널: SIGSEGV
#문제 프레임: PhaseOutput::BuildOopMaps() (HotSpot C2 JIT 내부)
#크래시 스레드: "C2 CompilerThread2" (JIT 컴파일러 스레드)
#크래시 직전 컴파일 중이던 메서드: C2: ... org.springframework.boot.loader.net.protocol.jar.Handler::openConnection (5 bytes)

112
src/main/java/com/bsmlab/dfx/cmd/DfxcmdApplication.java
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package com.bsmlab.dfx.cmd;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import javax.management.MBeanServerConnection;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import java.io.IOException;
import java.util.Set;
@SpringBootApplication
public class DfxcmdApplication {
public static void main(String[] args) {
if (args.length < 2) {
usage();
System.exit(1);
}
String agentId = args[0];
String command = args[1];
// shutdown 옵션
int exitCode = 0;
int delaySec = 0;
if ("shutdown".equalsIgnoreCase(command)) {
// dfxcmd <agentId> shutdown [exitCode] [delaySec]
if (args.length >= 3) exitCode = Integer.parseInt(args[2]);
if (args.length >= 4) delaySec = Integer.parseInt(args[3]);
}
ObjectName targetName = null;
try {
targetName = new ObjectName("com.bsmlab.dfx.agent:type=Control,agentId=" + ObjectName.quote(agentId));
}
catch (MalformedObjectNameException e) {
println("cannot find a jvm for " + agentId + " by ObjectName");
}
// 1) 타깃 JVM 찾기
JmxTarget target = null;
try {
target = JmxLocalAttach.findTargetJvmByMBean(targetName);
}
catch (Exception e) {
println("cannot find a jmx for " + agentId + " by MBean");
println(e.getMessage());
}
if (target == null) {
System.err.println("Target dfxagent not found for agentId=" + agentId);
System.exit(2);
}
try (JMXConnector connector = JmxLocalAttach.connect(target.pid())) {
MBeanServerConnection mbsc = connector.getMBeanServerConnection();
// 2) 정말 등록돼있는지 확인(안전)
Set<ObjectName> names = mbsc.queryNames(targetName, null);
if (names == null || names.isEmpty()) {
System.err.println("MBean not found in target JVM. agentId=" + agentId);
System.exit(3);
}
switch (command.toLowerCase()) {
case "status" -> {
String status = (String) mbsc.invoke(
targetName,
"status",
new Object[]{},
new String[]{}
);
System.out.println("status (agentId=" + agentId + ", status=" + status + ")");
}
case "shutdown" -> {
mbsc.invoke(
targetName,
"shutdown",
new Object[]{exitCode, delaySec},
new String[]{"int", "int"}
);
System.out.println("shutdown requested (agentId=" + agentId + ", exitCode=" + exitCode + ", delaySec=" + delaySec + ")");
}
default -> {
System.err.println("Unknown command: " + command);
usage();
System.exit(4);
}
}
}
catch (IOException e) {
println("exception on JMXConnector");
println(e.getLocalizedMessage());
}
catch (Exception e) {
println("exception on JMXConnector");
println(e.getLocalizedMessage());
}
}
private static void usage() {
System.out.println("Usage:");
System.out.println(" dfxcmd <agentId> status");
System.out.println(" dfxcmd <agentId> shutdown [exitCode] [delaySec]");
}
private static void println(String str) {
System.out.println(str);
}
}

64
src/main/java/com/bsmlab/dfx/cmd/JmxLocalAttach.java
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package com.bsmlab.dfx.cmd;
import com.sun.tools.attach.VirtualMachineDescriptor;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import com.sun.tools.attach.VirtualMachine;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public final class JmxLocalAttach {
private JmxLocalAttach() {}
public static JmxTarget findTargetJvmByMBean(ObjectName targetMBean) throws Exception {
List<JmxTarget> matches = new ArrayList<>();
for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {
// dn 예) com.bsmlab.dfx.agent.DfxAgentApplication --setting.file=D:\projects\bsm-lab\dfx\dfxagent\src\docs\agent-tuf-a15-defree-oracle\conf\dfxagent-tuf-a15-defree-oracle.json
String dn = vmd.displayName();
if (dn == null || dn.isBlank()) continue;
if (!dn.toLowerCase().contains("dfxagentapplication")) continue;
String pid = vmd.id();
// PID별로 JMX 접속을 시도해서 MBean 존재 여부로 판별
try (JMXConnector c = connect(pid)) {
MBeanServerConnection mbsc = c.getMBeanServerConnection();
Set<ObjectName> found = mbsc.queryNames(targetMBean, null);
if (found != null && !found.isEmpty()) {
matches.add(new JmxTarget(pid));
}
} catch (Exception ignore) {
// 접근 불가/권한 불가/JVM이 아닌 프로세스/연결 실패 등은 스킵
}
}
if (matches.isEmpty()) return null;
if (matches.size() > 1) {
// 동일 agentId로 여러개가 뜨면 설계상 문제이므로 명확히 에러
throw new IllegalStateException("Multiple JVMs matched for MBean " + targetMBean + " : " + matches);
}
return matches.get(0);
}
/**
* target JVM에 attach 후 startLocalManagementAgent()로 로컬 JMX 주소를 만든 다음 접속합니다.
*/
public static JMXConnector connect(String pid) throws Exception {
VirtualMachine vm = VirtualMachine.attach(pid);
try {
String addr = vm.startLocalManagementAgent();
if (addr == null || addr.isBlank()) {
throw new IllegalStateException("startLocalManagementAgent() returned empty for pid=" + pid);
}
return JMXConnectorFactory.connect(new JMXServiceURL(addr));
} finally {
vm.detach();
}
}
}

5
src/main/java/com/bsmlab/dfx/cmd/JmxTarget.java
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package com.bsmlab.dfx.cmd;
public record JmxTarget(String pid) {
}

3
src/main/resources/application.yaml
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spring:
application:
name: dfxcmd
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