Package org.apache.logging.log4j.kubernetes

Class ContainerUtil

java.lang.Object

org.apache.logging.log4j.kubernetes.ContainerUtil

public class ContainerUtil
extends Object

Locate the current docker container.

Constructor Summary

Constructors

Constructor	Description
ContainerUtil()

Method Summary

Modifier and Type	Method	Description
static String	getContainerId()	Returns the container id when running in a Docker container.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContainerUtil

public ContainerUtil()

Method Detail

getContainerId

public static String getContainerId()

Returns the container id when running in a Docker container. This inspects /proc/self/cgroup looking for a Kubernetes Control Group. Once it finds one it attempts to isolate just the docker container id. There doesn't appear to be a standard way to do this, but it seems to be the only way to determine what the current container is in a multi-container pod. It would have been much nicer if Kubernetes would just put the container id in a standard environment variable.

See Also:

Stackoverflow for a discussion on retrieving the containerId.,

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