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https://issues.apache.org/jira/browse/LOG4J2-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17702894#comment-17702894
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Volkan Yazici commented on LOG4J2-3655:
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You can either use one of the existing
[lookups|https://logging.apache.org/log4j/2.x/manual/lookups.html] (put the IP
into an environment variable called {{IP}} and use {{${env:IP}}}, use
{{${kubernetes.containerId}}} if you are running in a Kubernetes pod, etc.) or
create your own lookup (see {{DateLookup}} class for inspiration).
> Set the ip variable in loggerContext
> ------------------------------------
>
> Key: LOG4J2-3655
> URL: https://issues.apache.org/jira/browse/LOG4J2-3655
> Project: Log4j 2
> Issue Type: Question
> Reporter: xuwenping
> Priority: Major
>
> Hello, is it possible to get the server ip when the project is initialized,
> and put the ip into the LoggerContext as a variable, thank you.
> In this case, the downstream can directly use the value of ${ip} in the
> configuration file, similar to ${hostname}.
> I hope I can submit a pull request if I want, thanks!
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