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Old 10-09-2019, 05:54 AM   #1
masavini
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Registered: Jun 2008
Posts: 257

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docker: umask mounted host volume...


hi,
is there a way to mount a host volume into a docker container so that it is seen as owned by root instead of a normal user?
this is what i mean...
let's touch a file:
Code:
$ echo $USER
teo
$ id -u
1000
$ id -g
1000
$ mkdir /tmp/test
$ touch /tmp/test/t
$ ls -l /tmp/test/t
-rw-rw-r-- 1 teo teo 0 Oct  9 12:47 /tmp/test/t
... so far so good.

not let's mount /tmp/test as a host volume in a simple docker container and run the same ls -l command:
Code:
$ docker run --rm -v /tmp/test:/tmp/test alpine:3.7 ls -l /tmp/test/t
-rw-rw-r--    1 1000     1000             0 Oct  9 10:39 /tmp/test/t
question is:
is there a way to mount /tmp/test so that file t looks owned by container's root user and the output of the last command looks like this?
Code:
-rw-rw-r--    1 root     root             0 Oct  9 10:39 /tmp/test/t
thanks!
 
Old 10-09-2019, 06:29 AM   #2
pan64
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t is a file and is owned by 1000:1000. mount will not [be able to] change it.
 
  


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