Question

我有一个启动多个进程的bash脚本调用run.sh

#!/bin/bash
proc1 &
proc2 &
proc3 &
final # this runs until sigterm

当我执行run.sh并将SIGTERM发送到run.sh时，我认为SIGTERM不会被发送到final，我认为它不会被发送到{{} 1}}，proc1和proc2。请注意，在此用例中，这是一个运行proc3的docker容器，并且正在尝试发送SIGTERM，正在运行run.sh。

bash脚本将sigterm发送到它启动的所有进程的最简单方法是什么？我能想到的唯一方法是使用docker stop启动final，然后在&中执行while循环？

编辑 - 虽然我尝试过但似乎不起作用：在run.sh

run.sh

当停止停靠时，我从未看到#!/bin/bash _term() { echo "Caught SIGTERM signal!" } trap _term SIGTERM echo "hi" sleep 100000 & wait $!

Answer 1

你说你在Docker容器中运行该脚本。您能否详细介绍一下如何启动容器以及如何调用docker stop？

当调用SIGTERM或容器收到直接run.sh时，包含PID 1的进程将接收它。当您的&创建在后台中运行的子进程时，它还必须将信号转发给他们。

因此，在使用supervisord的bash脚本中创建后台子进程不是一个好方法。使用supervisor是一种很好的做法，因为它可以正确处理信号并将它们转发到子进程，而无需进一步编写脚本。

此外，Dockerfile不应作为shell子进程本身启动。如果您在CMD /usr/bin/supervisord：

中将此指定为容器命令，则会发生这种情况

CMD ["/usr/bin/supervisord"]

相反它应该看起来像：

  import javax.mail.BodyPart;
  import javax.mail.Message;
  import javax.mail.internet.MimeMultipart;
  import org.jsoup.Jsoup;

  ....    
  private String getTextFromMessage(Message message) throws Exception {
    if (message.isMimeType("text/plain")){
        return message.getContent().toString();
    }else if (message.isMimeType("multipart/*")) {
        String result = "";
        MimeMultipart mimeMultipart = (MimeMultipart)message.getContent();
        int count = mimeMultipart.getCount();
        for (int i = 0; i < count; i ++){
            BodyPart bodyPart = mimeMultipart.getBodyPart(i);
            if (bodyPart.isMimeType("text/plain")){
                result = result + "\n" + bodyPart.getContent();
                break;  //without break same text appears twice in my tests
            } else if (bodyPart.isMimeType("text/html")){
                String html = (String) bodyPart.getContent();
                result = result + "\n" + Jsoup.parse(html).text();

            }
        }
        return result;
    }
    return "";
}

这样主管就成为PID 1的根进程，并将正确接收所有信号，并将它们重定向到子进程。

Answer 2

使用jobs -p获取所有后台作业的流程ID，然后将其传递给kill。

trap 'kill $(jobs -p)' TERM

proc1 &
proc2 &
proc3 &

wait

Answer 3

正确，我会将它们全部收集在一个数组中，然后在完成时向每个数组发送一个信号。我会使用像dReader.o Make/linux64GccDPOpt/chem1dToFoam.o -L/home/vasu/OpenFOAM/OpenFOAM-2.3.1/platforms/linux64GccDPOpt/lib \ -L/home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib -lODE -lspecie -lcompressibleLESModels -lcompressibleTurbulenceModel - lcompressibleRASModels -lpdfFGMbasicThermophysicalModels - lpdfFGMreactionThermophysicalModels -lpdfFGMCombustionModels - lfiniteVolume -lOpenFOAM -ldl -lm -o /home/vasu/OpenFOAM/vasu- 2.3.1/platforms/linux64GccDPOpt/bin/pasrChem1dToFoam_m /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::fluidThermo::destroyTimeConstructorTables()' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::basicThermo::constructTimeConstructorTables()' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::basicThermo::destroyTimeConstructorTables()' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::fluidThermo::fluidThermo(Foam::Time const&, Foam::word const&)' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::fluidThermo::constructTimeConstructorTables()' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::basicThermo::TimeConstructorTablePtr_' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/lib/libpdfFGMbasicThermophysicalModels.so: undefined reference to `Foam::fluidThermo::TimeConstructorTablePtr_' collect2: error: ld returned 1 exit status /home/vasu/OpenFOAM/OpenFOAM-2.3.1/wmake/Makefile:149: recipe for target ' /home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/bin/pasrChem1dToFoam_m' failed make: *** [/home/vasu/OpenFOAM/vasu-2.3.1/platforms/linux64GccDPOpt/bin/pasrChem1dToFoam_m] Error 1这样的东西。

将SIGTERM发送到所有进程

3 个答案: