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https://issues.apache.org/jira/browse/YARN-5430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408798#comment-15408798
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Jian He commented on YARN-5430:
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bq. Similarly we should change getIpAndHost and split them up into getIps and
getHost calls.
Separating this means we need to make two separate calls into
container-executor binary and invoke the docker command which is additional
cost. I'd like to keep this as a single call.
bq. Instead of this, we should just use NetUtils.getLocalHostname() and
NetUtils.getIPs
This method will return all internal-facing IPs, including loopback ip which
will be meaningless to the user. I think we can return the localhost ip for
now, as the ip info is anyways not much useful for non-docker container
currently.
bq. Change log level to debug?
I'd like to keep as info which is useful for debugging. This is only a single
line output.
> Get container's ip and host from NM
> -----------------------------------
>
> Key: YARN-5430
> URL: https://issues.apache.org/jira/browse/YARN-5430
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Jian He
> Assignee: Jian He
> Attachments: YARN-5430.1.patch, YARN-5430.2.patch, YARN-5430.3.patch,
> YARN-5430.4.patch
>
>
> In YARN-4757, we introduced a DNS mechanism for containers. That's based on
> the assumption that we can get the container's ip and host information and
> store it in the registry-service. This jira aims to get the container's ip
> and host from the NM, primarily docker container
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