[gpfsug-discuss] rhel 7.1 systemd is un mounting gpfs file systems PMR 70339, 122, 000

[Puneet Chaudhary]

Matt, GPFS version 4.1.0-8 and prior had an issue with RHEL 7.1 systemd.
Red Hat introduced new changes is systemd that led to this issue.
Subsequently Red Hat issued an errata and reverted the changes to systemd (
https://rhn.redhat.com/errata/RHBA-2015-0738.html). Please update the level
of systemd on your nodes which will address the issue.



Regards,

Puneet Chaudhary
Scalable I/O Development
General Parallel File System (GPFS) and
Technical Computing (TC) Solutions Enablement
                                                                                    
                                                                                    
                                                                                    
 Phone: 1-720-342-1546 | Mobile: 1-845-475-8806                                 IBM 
 E-mail: puneetc at us.ibm.com                                                         
                                                                      2455 South Rd 
                                                        Poughkeepsie, NY 12601-5400 
                                                                      United States 
                                                                                    





From:	Matt Weil <mweil at genome.wustl.edu>
To:	gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:	11/30/2015 01:42 PM
Subject:	[gpfsug-discuss] rhel 7.1 systemd is un mounting gpfs file
            systems	PMR 70339, 122, 000
Sent by:	gpfsug-discuss-bounces at spectrumscale.org



Hello all,

Not sure if this is the a good place but we are experiencing a strange
issue.

It appears that systemd is un-mounting the file system immediately after
it is mounted.

#strace of systemd shows that the device is not there.  Systemd sees
that the path is failed and umounts the device.  Our only work around
currently is to link /usr/bin/umount to true.  Then the device stays
mounted.

1     stat("/dev/aggr3", {st_mode=S_IFBLK|0644, st_rdev=makedev(239,
235), ...}) = 0
1     readlink("/sys/dev/block/239:235", 0x7ffdb657a750, 1024) = -1
ENOENT (No such file or directory)
1     stat("/sys/dev/block/239:235", 0x7ffdb657a2c0) = -1 ENOENT (No
such file or directory)
1     socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 19

# It appears that the major min numbers have been changed
[root at gennsd4 system]# ls -l /sys/dev/block/|grep 239
lrwxrwxrwx 1 root root 0 Nov 19 15:04 253:239 ->
../../devices/virtual/block/dm-239
[root at gennsd4 system]#  ls -l /dev/aggr3
brw-r--r-- 1 root root 239, 235 Nov 19 15:06 /dev/aggr3
[root at gennsd4 system]# ls /sys/dev/block/239:235
ls: cannot access /sys/dev/block/239:235: No such file or directory

[root at gennsd4 system]# rpm -qa | grep gpfs
gpfs.gpl-4.1.0-7.noarch
gpfs.gskit-8.0.50-32.x86_64
gpfs.msg.en_US-4.1.0-7.noarch
gpfs.docs-4.1.0-7.noarch
gpfs.base-4.1.0-7.x86_64
gpfs.gplbin-3.10.0-229.14.1.el7.x86_64-4.1.0-7.x86_64
gpfs.ext-4.1.0-7.x86_64
[root at gennsd4 system]# rpm -qa | grep systemd
systemd-sysv-219-19.el7.x86_64
systemd-libs-219-19.el7.x86_64
systemd-219-19.el7.x86_64
systemd-python-219-19.el7.x86_64

any help would be appreciated.

Thanks

Matt

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