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https://issues.apache.org/jira/browse/YARN-8365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493884#comment-16493884
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Eric Yang commented on YARN-8365:
---------------------------------
Root record can still be fetched through ANY or SOA if upstream supports them:
{code}
dig @registry.dns.host . ANY
{code}
This is less aggressive than the default behavior. Hence, the change should
have negligible effect.
> Revisit the record type used by Registry DNS for upstream resolution
> --------------------------------------------------------------------
>
> Key: YARN-8365
> URL: https://issues.apache.org/jira/browse/YARN-8365
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn-native-services
> Reporter: Shane Kumpf
> Assignee: Shane Kumpf
> Priority: Major
> Attachments: YARN-8365.001.patch
>
>
> YARN-7326 leveraged the ANY record type for upstream resolution, but some
> implementations [don't support
> ANY|https://tools.ietf.org/html/draft-ietf-dnsop-refuse-any-06] due to the
> potential for abuse, namely Cloudflare. Docker Hub leverages Cloudflare for
> image distribution, so when Registry DNS is used as the sole resolver, docker
> image downloads are failing.
> {code:java}
> [root@host ~]# docker run -u root -it centos bash
> Unable to find image 'centos:latest' locally
> latest: Pulling from library/centos
> 469cfcc7a4b3: Already exists
> docker: error pulling image configuration: Get
> https://production.cloudflare.docker.com/registry-v2/docker/registry/v2/blobs/sha256/e9/e934aafc22064b7322c0250f1e32e5ce93b2d19b356f4537f5864bd102e8531f/data?verify=1527265495-nG8jk%2Bya9qrdPVlXRKGMnOhSnV0%3D:
> dial tcp: lookup production.cloudflare.docker.com on registry.dns.host:53:
> no such host.
> {code}
> {code:java}
> [root@host~]# nslookup production.cloudflare.docker.com registry.dns.host
> Server: registry.dns.host
> Address: registry.dns.host#53
> Non-authoritative answer:
> production.cloudflare.docker.com hinfo = "ANY obsoleted" "See
> draft-ietf-dnsop-refuse-any"
> {code}
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