适用于 Linux 的 Java Service Wrapper 找不到环境变量

Question

我正在使用 Java Service Wrapper (tanukisoftware) 在 centos linux 机器上运行我的 java 服务器。我的java代码使用System.getenv访问一些环境变量

当我在没有包装器的情况下运行程序时（例如ant run），我可以访问我的环境变量，但是当我通过包装器执行它时，我不能（服务XX控制台）

所以我放弃了定义的属性而不是我在wrapper.conf中定义的属性。这解决了我的java代码中的环境问题。

但后来我意识到我的 log4j.xml 也有一些环境变量引用。由于环境变量无法通过包装器获得，因此我的日志记录不起作用。

所以我必须解决并通过包装器提供环境变量。

有趣的是，当我的wrapper.conf作为服务运行时，它可以在Windows机器上工作，并且我可以访问环境变量......只是它不适用于Linux环境。

我在这两种环境中都使用了下面的wrapper.conf。

        #encoding=UTF-8
        # Configuration files must begin with a line specifying the encoding
        #  of the file.

        #********************************************************************
        # Wrapper License Properties (Ignored by Community Edition)
        #********************************************************************
        # Professional and Standard Editions of the Wrapper require a valid
        #  License Key to start.  Licenses can be purchased or a trial license
        #  requested on the following pages:
        # http://wrapper.tanukisoftware.com/purchase
        # http://wrapper.tanukisoftware.com/trial

        # Include file problems can be debugged by removing the first '#'
        #  from the following line:
        ##include.debug

        # The Wrapper will look for either of the following optional files for a
        #  valid License Key.  License Key properties can optionally be included
        #  directly in this configuration file.
        #include ../conf/wrapper-license.conf
        #include ../conf/wrapper-license-%WRAPPER_HOST_NAME%.conf

        # The following property will output information about which License Key(s)
        #  are being found, and can aid in resolving any licensing problems.
        #wrapper.license.debug=TRUE

        #********************************************************************
        # Wrapper Localization
        #********************************************************************
        # Specify the locale which the Wrapper should use.  By default the system
        #  locale is used.
        #wrapper.lang=en_US # en_US or ja_JP

        # Specify the location of the Wrapper's language resources.  If these are
        #  missing, the Wrapper will default to the en_US locale.
        wrapper.lang.folder=../lang

        #********************************************************************
        # Wrapper Java Properties
        #********************************************************************
        # Java Application
        #  Locate the java binary on the system PATH:
        wrapper.java.command=java
        #  Specify a specific java binary:
        #set.JAVA_HOME=/java/path
        #wrapper.java.command=%JAVA_HOME%/bin/java

        # Tell the Wrapper to log the full generated Java command line.
        wrapper.java.command.loglevel=INFO

        # Java Main class.  This class must implement the WrapperListener interface
        #  or guarantee that the WrapperManager class is initialized.  Helper
        #  classes are provided to do this for you.  See the Integration section
        #  of the documentation for details.
        wrapper.java.mainclass=org.tanukisoftware.wrapper.WrapperSimpleApp

        # Java Classpath (include wrapper.jar)  Add class path elements as
        #  needed starting from 1
        wrapper.java.classpath.1=../lib/wrapper.jar
        wrapper.java.classpath.2=../bin/ventsimulator.jar
        wrapper.java.classpath.3=../lib/netty-3.2.4.Final-sources.jar
        wrapper.java.classpath.4=../lib/netty-3.2.4.Final.jar
        wrapper.java.classpath.5=../lib/theronyxutils.jar


        # Java Library Path (location of Wrapper.DLL or libwrapper.so)
        wrapper.java.library.path.1=../lib

        # Java Bits.  On applicable platforms, tells the JVM to run in 32 or 64-bit mode.
        wrapper.java.additional.auto_bits=TRUE

        # Java Additional Parameters
        # Wait 4 secs till application initializes.
        # Make environment variables available as properties as an option, because on linux somehow the ENV variables are not available, through wrapper
        set.default.MDASJ_HOME_WIN=C:/Projects/MDASJ/code/mdasj-core/MDASJ
        set.default.MDASJ_PROJECTS_WIN=C:/Projects/MDASJ/code
        set.default.MDASJ_HOME_LINUX=/opt/mdasjroot/MDASJ
        set.default.MDASJ_PROJECTS_LINUX=/opt/mdasjroot


        wrapper.java.additional.1=-Dorg.tanukisoftware.wrapper.WrapperSimpleApp.maxStartMainWait=4
        wrapper.java.additional.2=-DMDASJ_HOME_WIN=%MDASJ_HOME_WIN%
        wrapper.java.additional.3=-DMDASJ_PROJECTS_WIN=%MDASJ_PROJECTS_WIN%
        wrapper.java.additional.4=-DMDASJ_HOME_LINUX=%MDASJ_HOME_LINUX%
        wrapper.java.additional.5=-DMDASJ_PROJECTS_LINUX=%MDASJ_PROJECTS_LINUX%


        # Initial Java Heap Size (in MB)
        #wrapper.java.initmemory=3

        # Maximum Java Heap Size (in MB)
        #wrapper.java.maxmemory=64

        # Application parameters.  Add parameters as needed starting from 1
        wrapper.app.parameter.1=com.theronyx.simulator.SimulatorManager

        #********************************************************************
        # Wrapper Logging Properties
        #********************************************************************
        # Enables Debug output from the Wrapper.
        # wrapper.debug=TRUE

        # Format of output for the console.  (See docs for formats)
        wrapper.console.format=PM

        # Log Level for console output.  (See docs for log levels)
        wrapper.console.loglevel=INFO

        # Log file to use for wrapper output logging.
        wrapper.logfile=%MDASJ_PROJECTS%/log/ventsimulator-wrapper.log

        # Format of output for the log file.  (See docs for formats)
        wrapper.logfile.format=LPTM

        # Log Level for log file output.  (See docs for log levels)
        wrapper.logfile.loglevel=INFO

        # Maximum size that the log file will be allowed to grow to before
        #  the log is rolled. Size is specified in bytes.  The default value
        #  of 0, disables log rolling.  May abbreviate with the 'k' (kb) or
        #  'm' (mb) suffix.  For example: 10m = 10 megabytes.
        wrapper.logfile.maxsize=0

        # Maximum number of rolled log files which will be allowed before old
        #  files are deleted.  The default value of 0 implies no limit.
        wrapper.logfile.maxfiles=0

        # Log Level for sys/event log output.  (See docs for log levels)
        wrapper.syslog.loglevel=NONE

        #********************************************************************
        # Wrapper General Properties
        #********************************************************************
        # Allow for the use of non-contiguous numbered properties
        wrapper.ignore_sequence_gaps=TRUE

        # Title to use when running as a console
        wrapper.console.title=OPUS Ventilator Simulator

        #********************************************************************
        # Wrapper JVM Checks
        #********************************************************************
        # Detect DeadLocked Threads in the JVM. (Requires Standard Edition)
        wrapper.check.deadlock=TRUE
        wrapper.check.deadlock.interval=60
        wrapper.check.deadlock.action=RESTART
        wrapper.check.deadlock.output=FULL

        # Out Of Memory detection.
        # (Simple match)
        wrapper.filter.trigger.1000=java.lang.OutOfMemoryError
        # (Only match text in stack traces if -XX:+PrintClassHistogram is being used.)
        #wrapper.filter.trigger.1000=Exception in thread "*" java.lang.OutOfMemoryError
        #wrapper.filter.allow_wildcards.1000=TRUE
        wrapper.filter.action.1000=RESTART
        wrapper.filter.message.1000=WRAPPER detected java.lang.OutOfMemoryError.....The JVM has run out of memory... RESTARTING

        #********************************************************************
        # Wrapper Email Notifications. (Requires Professional Edition)
        #********************************************************************
        # Common Event Email settings.
        #wrapper.event.default.email.debug=TRUE
        #wrapper.event.default.email.smtp.host=<SMTP_Host>
        #wrapper.event.default.email.smtp.port=25
        #wrapper.event.default.email.subject=[%WRAPPER_HOSTNAME%:%WRAPPER_NAME%:%WRAPPER_EVENT_NAME%] Event Notification
        #wrapper.event.default.email.sender=<Sender email>
        #wrapper.event.default.email.recipient=<Recipient email>

        # Configure the log attached to event emails.
        #wrapper.event.default.email.attach_log=TRUE
        #wrapper.event.default.email.maillog.lines=50
        #wrapper.event.default.email.maillog.format=LPTM
        #wrapper.event.default.email.maillog.loglevel=INFO

        # Enable specific event emails.
        #wrapper.event.wrapper_start.email=TRUE
        #wrapper.event.jvm_prelaunch.email=TRUE
        #wrapper.event.jvm_start.email=TRUE
        #wrapper.event.jvm_started.email=TRUE
        #wrapper.event.jvm_deadlock.email=TRUE
        #wrapper.event.jvm_stop.email=TRUE
        #wrapper.event.jvm_stopped.email=TRUE
        #wrapper.event.jvm_restart.email=TRUE
        #wrapper.event.jvm_failed_invocation.email=TRUE
        #wrapper.event.jvm_max_failed_invocations.email=TRUE
        #wrapper.event.jvm_kill.email=TRUE
        #wrapper.event.jvm_killed.email=TRUE
        #wrapper.event.jvm_unexpected_exit.email=TRUE
        #wrapper.event.wrapper_stop.email=TRUE

        # Specify custom mail content
        wrapper.event.jvm_restart.email.body=The JVM was restarted.\n\nPlease check on its status.\n

        #********************************************************************
        # Wrapper Windows NT/2000/XP Service Properties
        #********************************************************************
        # WARNING - Do not modify any of these properties when an application
        #  using this configuration file has been installed as a service.
        #  Please uninstall the service before modifying this section.  The
        #  service can then be reinstalled.

        # Name of the service
        wrapper.name=VentSimulator

        # Display name of the service
        wrapper.displayname=OPUS Vent Simulator

        # Description of the service
        wrapper.description=Runs a  Vent Simulation program to use with OPUS MDASJ, just for testing purposes

        # Service dependencies.  Add dependencies as needed starting from 1
        wrapper.ntservice.dependency.1=

        # Mode in which the service is installed.  AUTO_START, DELAY_START or DEMAND_START
        wrapper.ntservice.starttype=AUTO_START

        # Allow the service to interact with the desktop.
        wrapper.ntservice.interactive=false

Answer 1

您在 Linux 上看不到环境变量是有道理的。尝试通过直接调用 /etc/init.d 脚本来运行您的应用程序。它应该有效。所发生的情况是服务命令重置环境变量（以便服务始终在一致的环境中运行）。

Answer 2

优雅地使用参数 wrapper.java.additional 和 -D ;-)

正如您可能已经知道的，环境参数可能不适用于每个
用户/进程，因此您应该通过在
命令行。

Answer 3

你使用什么java版本？

getenv 在 1.3 中被弃用，但在 1.5 中恢复。

System.getenv("xxx") 返回什么？
是否只是找不到您定义的变量或常见的变量（例如 PATH 等）？

干杯

Answer 4

我在 yajsw-beta-12.05 版本中偶然发现了同样的问题。

那么我是如何偶然发现它的（这同样重要）：我正在使用 .sh 文件来调用 java -jar 包装器和其他东西......并且正在导出一个环境变量。并且该环境变量在应用程序中不可见。这就是我的搜索开始的地方。

我没有使用像安装卸载之类的包装脚本。我宁愿直接使用wrapper.jar并使用经过非常精简的yajsw版本。所以我需要传递环境变量。我没有选择采用 {wrapper.java.additional} 方式，因为我的变量应该具有动态值。
我查看了 {wrapper.app.env.key1=value1} ，这确实为应用程序提供了环境变量。但后来我想要一个动态值。

但最终我发现，如果我的wrapper.conf 文件中有任何像 wrapper.app.env.DUMMY=value 这样的虚拟条目，那么所有从 linux shell 脚本导出的变量都将在该应用程序。

希望这对某人有帮助。

Answer 5

在 opt/apacheds-2.0.0.AM26/conf/wrapper.conf 中设置以下内容（$JAVA_HOME/bin/java）对我有用。

wrapper.java.command=/usr/lib/jvm/jdk1.8.0_151/jre/bin/java