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From "Bernd Mathiske" <be...@mesosphere.io>
Subject Re: Review Request 41438: Added documentation on using network proxy for mesos fetcher
Date Thu, 17 Dec 2015 11:12:11 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/41438/#review110932
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docs/fetcher.md (line 224)
<https://reviews.apache.org/r/41438/#comment170934>

    s/a/an
    
    How about this title?
    
    "HTTP and SOCKS proxy settings"



docs/fetcher.md (lines 225 - 226)
<https://reviews.apache.org/r/41438/#comment170935>

    s/it's/it is



docs/fetcher.md (line 229)
<https://reviews.apache.org/r/41438/#comment170939>

    Since multiple protocols may be addressed, would plural read better here? "when certain
environment variables are set."
    
    (Otherwise, an "a" is missing before "certain".)



docs/fetcher.md (line 231)
<https://reviews.apache.org/r/41438/#comment170941>

    s/The/The respective
    
    This may make it even more clear that this is a variable per scheme



docs/fetcher.md (line 232)
<https://reviews.apache.org/r/41438/#comment170942>

    s/uri/URI
    
    BTW: You can end the sentence after this word and start a new one.



docs/fetcher.md (line 239)
<https://reviews.apache.org/r/41438/#comment170946>

    We should point out that FTP/FTPS also go over HTTP/HTTPS proxies. Even though in general
this  constrains the available FTP protocol operations, everything the fetcher uses is supported.



docs/fetcher.md (line 241)
<https://reviews.apache.org/r/41438/#comment170948>

    Suggestion: "Your proxy settings can be placed in `...`. Here is an example:"



docs/fetcher.md (line 244)
<https://reviews.apache.org/r/41438/#comment170950>

    Did you not have to write "export" in front?
    I know of a case where nothing worked unless you did.



docs/fetcher.md (line 248)
<https://reviews.apache.org/r/41438/#comment170944>

    Suggestion (less uncertain than "would" and less colloquial than "get"): 
    
    The fetcher will pick up these environment variable settings since the utility program
mesos-fetcher which it employs is a child of mesos-slave.


- Bernd Mathiske


On Dec. 16, 2015, 12:27 a.m., Shuai Lin wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/41438/
> -----------------------------------------------------------
> 
> (Updated Dec. 16, 2015, 12:27 a.m.)
> 
> 
> Review request for mesos and Bernd Mathiske.
> 
> 
> Bugs: MESOS-4130
>     https://issues.apache.org/jira/browse/MESOS-4130
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Added documentation on using network proxy for mesos fetcher
> 
> 
> Diffs
> -----
> 
>   docs/fetcher.md ec7372293491ed9ee4e20dda3c2def72a77a3f84 
> 
> Diff: https://reviews.apache.org/r/41438/diff/
> 
> 
> Testing
> -------
> 
> - Set `https_proxy=http://localhost:3128` (a local squid server) in `/etc/default/mesos-slave`,
restart mesos-slave, launch a new marathon task with a `https://` uri, and through the following
sysdig command I can see there is data exchanging between mesos-fetcher process and port 3128.
> 
> ```
> sudo sysdig -A -c echo_fds proc.name=mesos-fetcher and fd.port=3128
> ```
> 
> - Stop the local squid server, try to restart the marathon task, the task would fail
repeatly, from slave logs there are error messages that fetcher failed to fetch the uri.
> ```
> Dec 16 15:16:35 lin-E400 mesos-slave[24247]: E1216 15:16:35.678032 24283 slave.cpp:3342]
Container '45c14132-c56a-4cff-a6b5-f57ba2670643' for executor 'testapp_web.f0ef72d2-a3c4-11e5-af60-56847afe9799'
of framework 'b52179fd-8968-4
> bf8-baf0-dddc8a38c903-0000' failed to start: Failed to fetch all URIs for container '45c14132-c56a-4cff-a6b5-f57ba2670643'
with exit status: 2
> ```
> 
> - Restart the squid server, the task would start without a problem.
> 
> 
> Thanks,
> 
> Shuai Lin
> 
>


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