Inconsistent Automount (v5.0.7-83.el7) across RHEL 7.5 cluster

shawarden · 06-12-2018, 04:39 PM

I am having an issue with automount on a small university cluster.

Specifically the headnode doesn't mount anything listed in the auto.cifs file, but the compute nodes do without issue.

We're using samba for ads authentication and, sshd.conf allowing, I can log in using the domain accounts on the head and compute nodes without issue using those accounts.

The following files are identical across the head and compute nodes:

/etc/samba/smb.conf:

Code:

[global]
	workgroup = STAFF
	password server = STAFF.SCHOOL.EDU
	realm = STAFF.SCHOOL.EDU
	security = ads
	idmap config * : backend = tdb
	idmap config * : range = 10000-19999
	idmap config STAFF : backend = rid
	idmap config STAFF : range = 1000000-1999999
	idmap config STUDENT : backend = rid
	idmap config STUDENT : range = 2000000-2999999
	template shell = /bin/bash
	kerberos method = secrets and keytab
	winbind use default domain = true
	winbind offline logon = true
	server string = Samba Server Version %v
	log file = /var/log/samba/log.%m
	max log size = 50
	client use spnego = yes
	encrypt passwords = yes
	restrict anonymous = 2
	wins support = no
	dns proxy = yes
	load printers = no
	local master = no
	preferred master = no
	os level = 0
	log level = 3
	cups options = raw
	winbind nss info = rfc2307
	winbind enum users  = yes
	winbind enum groups = yes
	winbind refresh tickets = Yes
	winbind separator = +
	host msdfs = no

/etc/nsswitch.conf:

Code:

passwd:     files sss winbind
shadow:     files sss winbind
group:      files sss winbind

hosts:      files dns myhostname

bootparams: nisplus [NOTFOUND=return] files

ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files sss

netgroup:   files sss

publickey:  nisplus

automount:  files
aliases:    files nisplus

/etc/autofs.conf:
default values

/etc/auto.master:

Code:

+dir:/etc/auto.master.d
+auto.master
/-      auto.cifs        --timeout=345600        --ghost

/etc/auto.cifs:

Code:

/mnt/cifs/pathology/ \
 -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER \
 ://storage.storage.cifs.school.edu/pathology

/mnt/cifs/Clinical/ \
 -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER \
 ://storage.storage.cifs.school.edu/Clinical\$

/mnt/cifs/CSDG/ \
 -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER \
 ://storage.storage.cifs.school.edu/CSDG

/mnt/cifs/dgg/ \
 -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER \
 ://storage.storage.cifs.school.edu/dgg

/mnt/cifs/biochem/ \
 -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER \
 ://storage.storage.cifs.school.edu/biochem

I'm not sure what else could be affecting it.

The nodes work perfectly to mount the drive:

Code:

] automount -dfv
Starting automounter version 5.0.7-83.el7, master map auto.master
using kernel protocol version 5.02
lookup_nss_read_master: reading master files auto.master
do_init: parse(sun): init gathered global options: (null)
spawn_mount: mtab link detected, passing -n to mount
spawn_umount: mtab link detected, passing -n to mount
lookup_read_master: lookup(file): read entry +dir:/etc/auto.master.d
lookup_nss_read_master: reading master dir /etc/auto.master.d
lookup_read_master: lookup(dir): scandir: /etc/auto.master.d
lookup_read_master: lookup(file): read entry +auto.master
lookup_nss_read_master: reading master files auto.master
do_init: parse(sun): init gathered global options: (null)
lookup_read_master: lookup(file): read entry /-
master_do_mount: mounting /-
automount_path_to_fifo: fifo name /run/autofs.fifo--
lookup_nss_read_map: reading map files auto.hcs
do_init: parse(sun): init gathered global options: (null)
spawn_mount: mtab link detected, passing -n to mount
spawn_umount: mtab link detected, passing -n to mount
mounted direct on /mnt/cifs/dgg/ with timeout 345600, freq 86400 seconds
do_mount_autofs_direct: mounted trigger /mnt/cifs/dgg/
mounted direct on /mnt/cifs/pathology/ with timeout 345600, freq 86400 seconds
do_mount_autofs_direct: mounted trigger /mnt/cifs/pathologys/
mounted direct on /mnt/cifs/biochem/ with timeout 345600, freq 86400 seconds
do_mount_autofs_direct: mounted trigger /mnt/cifs/biochem/
remount_active_mount: trying to re-connect to mount /mnt/cifs/CSDG/
mounted direct on /mnt/cifs/CSDG/ with timeout 345600, freq 86400 seconds
lookup_mount: lookup(file): looking up /mnt/cifs/CSDG/
lookup_mount: lookup(file): /mnt/cifs/CSDG/ -> -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=$USER,cruid=$UID,gid=$USER  ://storage.cifs.school.edu/CSDG
parse_mount: parse(sun): expanded entry: -fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=staffXYZ,cruid=1042047,gid=staffXYZ  ://storage.cifs.school.edu/CSDG
parse_mount: parse(sun): gathered options: fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=staffXYZ,cruid=1042047,gid=staffXYZ
parse_mount: parse(sun): dequote("://storage.cifs.school.edu/CSDG") -> ://storage.cifs.school.edu/CSDG
parse_mount: parse(sun): core of entry: options=fstype=cifs,rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=staffXYZ,cruid=1042047,gid=staffXYZ, loc=://storage.cifs.school.edu/CSDG
sun_mount: parse(sun): mounting root /mnt/cifs/CSDG/, mountpoint /mnt/cifs/CSDG/, what //storage.cifs.school.edu/CSDG, fstype cifs, options rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=staffXYZ,cruid=1042047,gid=staffXYZ
do_mount: //storage.cifs.school.edu/CSDG /mnt/cifs/CSDG/ type cifs options rw,noserverino,nounix,file_mode=0770,dir_mode=0770,multiuser,sec=krb5,user=staffXYZ,cruid=1042047,gid=staffXYZ using module generic
re-connected to /mnt/cifs/CSDG/
remount_active_mount: re-connected to mount /mnt/cifs/CSDG/
mounted direct on /mnt/cifs/Clinical/ with timeout 345600, freq 86400 seconds
do_mount_autofs_direct: mounted trigger /mnt/cifs/Clinical/
st_ready: st_ready(): state = 0 path /-

but on the headnode it's just:

Code:

] automount -dfv
Starting automounter version 5.0.7-83.el7, master map auto.master
using kernel protocol version 5.02
lookup_nss_read_master: reading master files auto.master
do_init: parse(sun): init gathered global options: (null)
spawn_mount: mtab link detected, passing -n to mount
spawn_umount: mtab link detected, passing -n to mount
lookup_read_master: lookup(file): read entry +dir:/etc/auto.master.d
lookup_nss_read_master: reading master dir /etc/auto.master.d
lookup_read_master: lookup(dir): scandir: /etc/auto.master.d
lookup_read_master: lookup(file): read entry +auto.master
lookup_nss_read_master: reading master files auto.master
do_init: parse(sun): init gathered global options: (null)
lookup_read_master: lookup(file): read entry /-
master_do_mount: mounting /-
automount_path_to_fifo: fifo name /run/autofs.fifo--
lookup_nss_read_map: reading map files auto.cifs
do_init: parse(sun): init gathered global options: (null)
spawn_mount: mtab link detected, passing -n to mount
spawn_umount: mtab link detected, passing -n to mount
st_ready: st_ready(): state = 0 path /-

It's not even looking at the /etc/auto.cifs file and I've no idea why.

These file are rsync-ed cluster-wide and look to me to be completely identical.

Are there other files that have an impact on automount under this configuration?

Many thanks.

shawarden · 06-17-2018, 07:02 PM

Resolved.

The share list file /etc/auto.cifs can't be executable.

Nice that there's no error or comment about it in the debug output.