This is probably a build issue of some kind, but I'm not quite sure how...
The MDS (and all the Ceph code) is just invoking the getgrnam_r function,
which is part of POSIX and implemented by glib (or whatever other libc). So
any dependency on nscd is being created "behind our backs" somewhere.
Anyone have any ideas?
-Greg
On Tue, Feb 26, 2019 at 7:06 PM Chad W Seys <cws...@physics.wisc.edu> wrote:
> Hi all,
> I cannot get my luminous 12.2.11 mds servers to start on Debian 9(.8)
> unless nscd is also installed.
>
> Trying to start from command line:
> # /usr/bin/ceph-mds -f --cluster ceph --id mds02.hep.wisc.edu --setuser
> ceph --setgroup ceph unable to look up group 'ceph': (34) Numerical
> result out of range
>
> Can look up ceph fine with 'id'
> # id ceph
> uid=11(ceph) gid=11(ceph) groups=11(ceph)
>
>
> If I strace, I notice that an nscd directory makes an appearance:
> [...]
> open("/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
> lseek(3, 0, SEEK_CUR) = 0
> fstat(3, {st_mode=S_IFREG|0644, st_size=285846, ...}) = 0
> mmap(NULL, 285846, PROT_READ, MAP_SHARED, 3, 0) = 0x7f5970ed2000
> lseek(3, 285846, SEEK_SET) = 285846
> munmap(0x7f5970ed2000, 285846) = 0
> close(3) = 0
> socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
> connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) =
> -1 ENOENT (No such file or directory)
> close(3) = 0
> socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
> connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) =
> -1 ENOENT (No such file or directory)
> close(3) = 0
> open("/etc/group", O_RDONLY|O_CLOEXEC) = 3
> lseek(3, 0, SEEK_CUR) = 0
> fstat(3, {st_mode=S_IFREG|0644, st_size=122355, ...}) = 0
> mmap(NULL, 122355, PROT_READ, MAP_SHARED, 3, 0) = 0x7f5970efa000
> lseek(3, 122355, SEEK_SET) = 122355
> lseek(3, 7495, SEEK_SET) = 7495
> munmap(0x7f5970efa000, 122355) = 0
> close(3) = 0
> write(2, "unable to look up group '", 25unable to look up group ') = 25
> write(2, "ceph", 4ceph) = 4
> write(2, "'", 1') = 1
> write(2, ": ", 2: ) = 2
> write(2, "(34) Numerical result out of ran"..., 34(34) Numerical result
> out of range) = 34
> write(2, "\n", 1
>
> So I install nscd and mds starts!
>
> Shouldn't ceph be agnostic in how the ceph group is looked up? Do I
> have some kind of config problem?
>
> My nsswitch.conf file is below. I've tried replacing 'compat' with
> files, but there is no change.
>
> # cat /etc/nsswitch.conf
> # /etc/nsswitch.conf
> #
> # Example configuration of GNU Name Service Switch functionality.
> # If you have the `glibc-doc-reference' and `info' packages installed, try:
> # `info libc "Name Service Switch"' for information about this file.
>
> passwd: compat
> group: compat
> shadow: compat
> gshadow: files
>
> hosts: files dns
> networks: files
>
> protocols: db files
> services: db files
> ethers: db files
> rpc: db files
>
> netgroup: nis
>
>
> Thanks!
> Chad.
> _______________________________________________
> ceph-users mailing list
> ceph-users@lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
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