Operation not permitted) while reading upstream - error log is filled with tons of these

Francis Daly francis at daoine.org
Sat Jan 20 13:58:23 UTC 2018

On Sat, Jan 20, 2018 at 12:47:29PM +0000, Friscia, Michael wrote:

Hi there,

> 2018/01/20 07:37:44 [crit] 122598#122598: *91 chmod() "/etc/nginx/cache/nginx2/main/a5/d8/e0/72677057b97aef4eee8e619c49e0d8a5.0000000013" failed (1: Operation not permitted) while reading upstream, client:, server: *.---.com, request: "GET /search/----.profile HTTP/1.1", upstream: "http://---.---.---.---:80/search/----.profile", host: "---.com"

> The actual setup is that this is on Azure, the storage location /etc/nginx/cache/nginx2 is a mounted file share from Azure storage.

How precisely is the file share mounted?

The error indication is that chmod() failed.

Does chmod() work on that filesystem?

Can you change the mount options such that chmod() will return success,
even if it does not actually change the permissions of the file?

https://superuser.com/questions/744384/allow-chmod-on-cifs-mount suggests
that "noperm" in the mount options had the desired effect for one user;
note that that does not seem (to me) to match what the "mount.cifs"
documentation says, so you'll want to do your own investigation and
testing before relying on it.

> Has anyone seen/solved this before?

I haven't. So the above is "questions" rather than "suggestions how to fix".

Good luck with it,

Francis Daly        francis at daoine.org

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