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https://issues.apache.org/jira/browse/ZOOKEEPER-4757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17774903#comment-17774903
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Jan Høydahl commented on ZOOKEEPER-4757:
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> What do you mean exactly by 'Maven can help keep versions' and why is it an
> advantage over a docker project?
Dockerfile is not particaulary suited for pulling jar files. You end up with
wget from mvnrepo or similar and no dependabot support or similar for staying
up to date. Let's see what downstream says.
Is there anything at all from my PR you want to accept? Docs with pointers?
Commented-out appender?
> Support JSON format logging
> ---------------------------
>
> Key: ZOOKEEPER-4757
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4757
> Project: ZooKeeper
> Issue Type: Improvement
> Reporter: Jan Høydahl
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> More and more enterprise users request structured JSON format logging for
> their applications. This removes the need for configuring custom log line
> parsers for every application when collecting logs centrally.
> Zookeeper has flexible logging through Slf4j and Logback, for which there are
> several ways to achieve JSON logging. But for end users (such as helm chart
> user) it is very difficult to achieve. It should ideally be as simple as a
> configuration option.
> OpenTelemetry is a CNCF project that has become the defacto standard for
> metrics and traces collection. They also cover logging, and they recently
> [standardized on ECS JSON
> format|https://opentelemetry.io/blog/2023/ecs-otel-semconv-convergence/] as
> their log schema for OTEL-logging. Although there are other JSON formats in
> use, a pragmatic option for zookeeper is to only support ECS.
> Proposed way to enable JSON logging:
> {code:java}
> export ZOO_LOG_FORMAT=json
> bin/zkServer.sh start-foreground{code}
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