如何解决在 DOCKERFILE 中运行 2 个 java 进程
我在 kuberntes 中有一个 ignite(gridgain-community) statefulset 集群。 我从下面的 docker(cmd 运行 jmx 导出器)创建了 sucssfuly 图像:
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"]
但是当我从此图像开始图表时,pod 正在运行但尚未准备好:
NAME READY STATUS RESTARTS AGE
online-db-0 0/1 Running 3 4m2s
并在描述中:
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 启动而 ignite java 关闭,当我在 ignite 容器上手动启动 jmx 时它确实起作用了:
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 - 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
日志中没有任何内容,有人可以帮助解释为什么会发生这种情况吗?
解决方法
我创建了一个 startall.sh 脚本,它同时运行 ignite 进程和 jm scrpts,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 以仅运行包装器脚本:
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" ]
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