[jira] [Commented] (TC-151) Delivery Service XML IDs should be limited to lower-case letters

["Hank Beatty (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TC-151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121911#comment-16121911 ] 

Hank Beatty commented on TC-151:
--------------------------------

[~shemesh] Changing this from "Bug" to "New Feature". This is not a bug for TO because TO does not allow for case sensitive XML IDs.

The TR portion would be a separate issue. However...

> 1. The TR sends a redirect to a host FQDN which contains a lower-case version of the DS XML ID

I don't think this is a bug for TR either. I would expect TR to act this way.

> 2. The TR does not resolve the lower-case version of the host FQDN

I wasn't able to resolve the host either. Maybe it is a lab host? Can you post a dig where it is resolving?

If you still think this is a bug please open another jira ticket against the component Traffic Router.

Thanks,
Hank

> Delivery Service XML IDs should be limited to lower-case letters
> ----------------------------------------------------------------
>
>                 Key: TC-151
>                 URL: https://issues.apache.org/jira/browse/TC-151
>             Project: Traffic Control
>          Issue Type: New Feature
>          Components: Traffic Ops
>    Affects Versions: 1.7.0
>            Reporter: Oren Shemesh
>            Priority: Minor
>              Labels: delivery_service, xml-id
>
> The DNS system is case-insensitive. Since a delivery service XML ID is used as part of the FQDN of the cache being redirected to, two different DSs cannot differ only by case.
> This leads to the conclusion that it is best if we limit the XML IDs of delivery services to be lower-case only.
> This would achieve the following:
> 1. Make domain names used by TC 'conventional' (i.e. lower-case only)
> 2. Remove the possibility of a case-conflict between DSs
> 3. Currently, Traffic Router does not behave correctly when a DS XML ID contains upper case letters. Limiting to lower-case would prevent the need to fix this :-)
> Current problems with TR behaviour, when an XML ID contains opper-case letter are:
> 1. The TR sends a redirect to a host FQDN which contains a lower-case version of the DS XML ID
> 2. The TR does not resolve the lower-case version of the host FQDN.
> Here is an example to demo current bug in TR. DS XML ID is opencachehub-DT, TR redirects to opencachehub-dt, and then refused to resolve the cache name using this DS (a lot of irrelevant data was removed fro this text):
> $ curl -L -s -D - http://tr.opencachehub-DT.stage-cdn.tc-stage.cqloud.com/video01.mp4 -v
> * Connected to tr.opencachehub-DT.stage-cdn.tc-stage.cqloud.com (54.244.152.242) port 80 (#0)
> > GET /video01.mp4 HTTP/1.1
> > Host: tr.opencachehub-DT.stage-cdn.tc-stage.cqloud.com
> > Accept: */*
> > 
> < HTTP/1.1 302 Moved Temporarily
> < Location: http://p39-edge-lab.opencachehub-dt.stage-cdn.tc-stage.cqloud.com/video01.mp4
> < Content-Length: 0
> < 
> * Connection #0 to host tr.opencachehub-DT.stage-cdn.tc-stage.cqloud.com left intact
> * Issue another request to this URL: 'http://p39-edge-lab.opencachehub-dt.stage-cdn.tc-stage.cqloud.com/video01.mp4'
> * getaddrinfo(3) failed for p39-edge-lab.opencachehub-dt.stage-cdn.tc-stage.cqloud.com:80
> * Couldn't resolve host 'p39-edge-lab.opencachehub-dt.stage-cdn.tc-stage.cqloud.com'



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