根据节点具体的PID如何定位到指定的容器，三种方法

• 笨方法，根据进程PID定位，如节点运行了很多的java进程，在部署设计时没有什么区别及环境变量，很难区分进程对应的容器

1. 列出具体应用的进程，如下

   <root@SIT-K8S-WN7 ~># ps -ef | grep java
   nflow     1272  1245  9 11:26 ?        00:01:33 java -jar -javaagent:/home/nflow/servers/jvmAgent/jmx_prometheus_javaagent-0.15.0.jar=8888:/home/nflow/servers/jvmAgent/config.yml -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar
   nflow     3504  3469  0 Apr01 ?        04:11:43 java -jar -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar --spring.profiles.active=sit02
   nflow     5865  5846  0 Jul28 ?        03:24:03 java -jar -javaagent:/home/nflow/servers/jvmAgent/jmx_prometheus_javaagent-0.15.0.jar=8888:/home/nflow/servers/jvmAgent/config.yml -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar
   nflow     8457  8428  0 Aug16 ?        00:10:03 /usr/local/java/bin/java -Djava.util.logging.config.file=/home/nflow/servers/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0022 -javaagent:/home/nflow/servers/jvmAgent/jmx_prometheus_javaagent-0.15.0.jar=8888:/home/nflow/servers/jvmAgent/config.yml -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom -Dignore.endorsed.dirs= -classpath /home/nflow/servers/tomcat/bin/bootstrap.jar:/home/nflow/servers/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/home/nflow/servers/tomcat -Dcatalina.home=/home/nflow/servers/tomcat -Djava.io.tmpdir=/home/nflow/servers/tomcat/temp org.apache.catalina.startup.Bootstrap start
   nflow    10338 10100  0 Apr01 ?        09:28:40 java -jar -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar --spring.profiles.active=sit02
   nflow    12192 12173  1 Jun30 ?        20:52:01 java -jar -javaagent:/home/nflow/servers/jvmAgent/jmx_prometheus_javaagent-0.15.0.jar=8888:/home/nflow/servers/jvmAgent/config.yml -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar --spring.profiles.active=sit03

2. 根据子PID定位父PID

   <root@SIT-K8S-WN7 ~># ps -ef | grep 3504
   nflow     3504  3469  0 Apr01 ?        04:11:44 java -jar -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar --spring.profiles.active=sit02
   root     27273  7708  0 11:47 pts/0    00:00:00 grep --color=auto 3504
   <root@SIT-K8S-WN7 ~># ps -ef | grep 3469
   nflow     3469  3443  0 Apr01 ?        00:00:00 /bin/bash /home/nflow/scripts/start.sh
   nflow     3504  3469  0 Apr01 ?        04:11:44 java -jar -d64 -server -XX:+UseContainerSupport -XX:MaxRAMPercentage=80.0 -XX:InitialRAMPercentage=80.0 -XX:MinRAMPercentage=80.0 -Duser.timezone=GMT+08 -XX:MetaspaceSize=512m -XX:MaxMetaspaceSize=512M -Djava.security.egd=file:/dev/./urandom /home/nflow/servers/app.jar --spring.profiles.active=sit02

3. 逐层追踪

   <root@SIT-K8S-WN7 ~># ps -ef | grep 3443
   root      3443  1858  0 Apr01 ?        00:29:24 containerd-shim -namespace moby -workdir /var/lib/containerd/io.containerd.runtime.v1.linux/moby/06be66e1babe13bd58d3b7aa462aae055d5b90595378a9eca684de5b0571109c -address /run/containerd/containerd.sock -containerd-binary /usr/bin/containerd -runtime-root /var/run/docker/runtime-runc
   nflow     3469  3443  0 Apr01 ?        00:00:00 /bin/bash /home/nflow/scripts/start.sh

4. 第3步已经追踪到具体的container_id，06be66e1babe13bd58d3b7aa462aae055d5b90595378a9eca684de5b0571109c
5. 定位

根据PID查看具体的容器