On Fri, Mar 23, 2018 at 9:50 PM, Josh Haft <paccrap@xxxxxxxxx> wrote: > On Fri, Mar 23, 2018 at 12:14 AM, Yan, Zheng <ukernel@xxxxxxxxx> wrote: >> >> On Fri, Mar 23, 2018 at 5:14 AM, Josh Haft <paccrap@xxxxxxxxx> wrote: >> > Hello! >> > >> > I'm running Ceph 12.2.2 with one primary and one standby MDS. Mounting >> > CephFS via ceph-fuse (to leverage quotas), and enabled ACLs by adding >> > fuse_default_permissions=0 and client_acl_type=posix_acl to the mount >> > options. I then export this mount via NFS and the clients mount NFS4.1. >> > >> does fuse_default_permissions=0 work? > > Yes, ACLs work as expected when I set fuse_default_permissions=0. > >> > After doing some in-depth testing it seems I'm unable to allow access from >> > the NFS clients to a directory/file based on group membership when the >> > underlying CephFS was mounted with ACL support. This issue appears using >> > both filesystem permissions (e.g. chgrp) and NFSv4 ACLs. However, ACLs do >> > work if the principal is a user instead of a group. If I disable ACL support >> > on the ceph-fuse mount, things work as expected using fs permissions; >> > obviously I don't get ACL support. >> > >> > As an intermediate step I did check whether this works directly on the >> > CephFS filesystem - on the NFS server - and it does. So it appears to be an >> > issue re-exporting it via NFS. >> > >> > I do not see this issue when mounting CephFS via the kernel, exporting via >> > NFS, and re-running these tests. >> > >> > I searched the ML and bug reports but only found this - >> > http://tracker.ceph.com/issues/12617 - which seems close to the issue I'm >> > running into, but was closed as resolved 2+ years ago. >> > >> > Has anyone else run into this? Am I missing something obvious? >> > >> >> ceph-fuse does permission check according to localhost's config of >> supplement group. that's why you see this behavior. > > You're saying both the NFS client and server (where ceph-fuse is > running) need to use the same directory backend? (they are) > I should have mentioned I'm using LDAP/AD on client and server, so I > don't think that is the problem. > > Either way, I would not expect the behavior to change simply by > enabling ACLs, especially when I'm using filesystem permissions, and > ACLs aren't part of the equation. More specifically, ceph-fuse find which groups request initiator are in by function fuse_req_getgroups(). this function does tricks on "/proc/%lu/task/%lu/status". It only works when nfs client and ceph-fuse are running on the same machine. >> Yan, Zheng >> >> > Thanks! >> > Josh >> > >> > >> > _______________________________________________ >> > ceph-users mailing list >> > ceph-users@xxxxxxxxxxxxxx >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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