I changed /webcluster/data this way
rwxrwxrwx dev dev /webcluster/data
Still newly added users can't write to it.
On 11/5/2019 7:04 PM, Alex Litvak wrote:
Plot thickens.
I create a new user sam2 and group sam2 both uid and gid = 1501. User sam2 is
a member of group dev. When I switch to user sam2 I get permission deny when
writing to
rwxrwxr-x dev dev /webcluster/data
However I can write to
rwxrwxr-x dev dev /webcluster/data/examples
It makes no sense. Old users from the group dev (created and connected) long
time ago can write into data dir and new ones cannot.
On 11/5/2019 3:07 PM, Alex Litvak wrote:
Hello Cephers,
I am trying to understand how uid and gid are handled on the shared cephfs
mount. I am using 14.2.2 and cephfs kernel based client.
I have 2 client vms with following uid gid
vm1 user dev (uid=500) group dev (gid=500)
vm2 user dev (uid=500) group dev (gid=500)
vm1 user tomcat (uid=996) group tomcat (gid=995)
vm2 user tomcat (uid=990) group tomcat (gid=990)
on both machines user tomcat is added to a group dev.
Directory /webcluster/data is a kernel cephfs mount and has permissions visible
on both clients as
rwxrwxr-x dev dev /webcluster/data
also
rwxr-xr-x root root /webcluster
So it is my understanding that on both vms I should be able to successfully run
touch /webcluster/data/foo as user tomcat.
However, on vm2 I get permission denied when I attempt to write a file in
/webcluster/data.
When I change uid and gid of tomcat on vm2 to match those on vm1, then I
successfully can write into /webcluster/data.
As on both machines user tomcat is a member of group dev and group dev is
allowed to write in the directory, why do the uids of the group members need to
match across network?
I tried research it on my own and failed to find a good explanation.
Thank you for your help,
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