在DOCKERFILE中运行2个java进程

Question

我在kuberntes中有一个ignite(Gridgain Community)状态集集群。我从下面的docker创建了sucssfuly镜像( cmd运行jmx exporter)：

FROM gridgain/community:8.8.1-slim

USER root
RUN mkdir -p /opt/jmx_exporter/

COPY ./jmx/*  /opt/jmx_exporter/
RUN chmod 700 /opt/jmx_exporter/start.sh
CMD ["/bin/sh", "/opt/jmx_exporter/start.sh"]

但是当我从这个图像开始图表时，pod正在运行，但还没有准备好：

NAME          READY   STATUS    RESTARTS   AGE
online-db-0   0/1     Running   3          4m2s

在describe中：

  Normal   Started    51s                kubelet, samppc01srv01kbr002.novalocal  Started container online-db
  Warning  Unhealthy  12s (x3 over 32s)  kubelet, samppc01srv01kbr002.novalocal  Liveness probe failed: Get http://10.233.109.23:8080/ignite?cmd=version: dial tcp 10.233.109.23:8080: connect: connection refused
  Normal   Killing    12s                kubelet, samppc01srv01kbr002.novalocal  Container online-db failed liveness probe, will be restarted
  Warning  Unhealthy  9s (x3 over 29s)   kubelet, samppc01srv01kbr002.novalocal  Readiness probe failed: Get http://<IP>/ignite?cmd=probe: dial tcp <ip>:8080: connect: connection refused

当我检查pod时，我看到只有jmx在打开，ignite java在关闭，当我在ignite容器上手动启动jmx时，它起作用了：

bash-4.4# ps -ef | grep java
    6 root      0:01 java -Djava.net.preferIPv4Stack=true -jar /opt/jmx_exporter/jmx_prometheus_httpserver-0.12.0-jar-with-dependencies.jar 5556 /opt/jmx_exporter/config.yml
   26 root      0:00 grep java

start.sh - the java_script

!/bin/sh

if [ -z "$SERVICE_PORT" ]; then
 

     SERVICE_PORT=5556
    fi
    
    if [ -z "$JVM_OPTS" ]; then
      JVM_OPTS="-Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=5555"
    fi
    
    if [ -z "$CONFIG_YML" ]; then
      CONFIG_YML=/opt/jmx_exporter/config.yml
    fi
    
    VERSION=0.12.0
    
    java $JVM_OPTS -jar /opt/jmx_exporter/jmx_prometheus_httpserver-$VERSION-jar-with-dependencies.jar $SERVICE_PORT $CONFIG_YML

日志里什么都没有，有没有人能帮助解释为什么会发生这种情况？

Answer 1

我创建了一个同时运行ignite进程和jm脚本的startall.sh脚本，如下所示：

#!/bin/sh

set -m


/opt/jmx_exporter/start.sh &

/bin/sh -c ${IGNITE_HOME}/run.sh

然后编辑我的dockefile，只运行包装器脚本：

FROM gridgain/community:8.8.1-slim
USER root
RUN mkdir -p /opt/jmx_exporter/ 
COPY ./jmx/*  /opt/jmx_exporter/ 
RUN chmod 700 /opt/jmx_exporter/start.sh 
CMD ["/bin/sh", "/opt/jmx_exporter/startall.sh" ]