I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages stored so that I can quote accurately?).
I have temporarily disabled both the firewall and selinux, and the problem persists, so clearly they are not the cause. Logwatch has the following section which may or may not be connected:
--------------------- Connections (secure-log) Begin ------------------------
Userhelper executed applications: anne -> system-config-users as root: 1 Time(s)
**Unmatched Entries** polkitd(authority=local): Operator of unix- session:/org/freedesktop/ConsoleKit/Session2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.fedoraproject.config.firewall.auth for system-bus-name::1.88 [/usr/bin/python /usr/bin/system-config-firewall] (owned by unix-user:anne): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session2 (system bus name :1.45 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session6 (system bus name :1.214, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8) (disconnected from bus): 1 Time(s)
---------------------- Connections (secure-log) End -------------------------
An example fstab line is
/Data1 /nfs4exports/Data1 none bind 0 0
Under CentOS 5 this was mounted by the exports line:
/nfs4exports/Data1 192.168.0.0/24(rw,insecure,no_subtree_check,nohide)
Following advice, I have changed this to:
/Data1/ 192.168.0.0/255.255.255.0 *(rw,sync,insecure,no_all_squash)
That hasn't helped at all.
I'm completely at a loss, and really need to get this connection working again. I've done lots of googling and reading, but just feel to be digging an ever-deeper hole. All help appreciated.
Anne
On Aug 19, 2011, at 10:39 AM, Anne Wilson wrote:
I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages stored so that I can quote accurately?).
I have temporarily disabled both the firewall and selinux, and the problem persists, so clearly they are not the cause. Logwatch has the following section which may or may not be connected:
--------------------- Connections (secure-log) Begin
Userhelper executed applications: anne -> system-config-users as root: 1 Time(s)
**Unmatched Entries** polkitd(authority=local): Operator of unix- session:/org/freedesktop/ConsoleKit/Session2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.fedoraproject.config.firewall.auth for system-bus-name::1.88 [/usr/bin/python /usr/bin/system-config-firewall] (owned by unix- user:anne): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session2 (system bus name :1.45 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session6 (system bus name :1.214, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8) (disconnected from bus): 1 Time(s)
---------------------- Connections (secure-log) End
An example fstab line is
/Data1 /nfs4exports/Data1 none bind 0 0
Under CentOS 5 this was mounted by the exports line:
/nfs4exports/Data1 192.168.0.0/24(rw,insecure,no_subtree_check,nohide)
Following advice, I have changed this to:
/Data1/ 192.168.0.0/255.255.255.0 *(rw,sync,insecure,no_all_squash)
That hasn't helped at all.
I'm completely at a loss, and really need to get this connection working again. I've done lots of googling and reading, but just feel to be digging an ever-deeper hole. All help appreciated.
Anne _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
Tony
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
On Aug 19, 2011, at 10:39 AM, Anne Wilson wrote:
I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages stored so that I can quote accurately?).
I have temporarily disabled both the firewall and selinux, and the problem persists, so clearly they are not the cause. Logwatch has the following section which may or may not be connected:
--------------------- Connections (secure-log) Begin
Userhelper executed applications: anne -> system-config-users as root: 1 Time(s)
**Unmatched Entries** polkitd(authority=local): Operator of unix- session:/org/freedesktop/ConsoleKit/Session2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.fedoraproject.config.firewall.auth for system-bus-name::1.88 [/usr/bin/python /usr/bin/system-config-firewall] (owned by unix- user:anne): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session2 (system bus name :1.45 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session6 (system bus name :1.214, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8) (disconnected from bus): 1 Time(s)
---------------------- Connections (secure-log) End
An example fstab line is
/Data1 /nfs4exports/Data1 none bind 0 0
Under CentOS 5 this was mounted by the exports line:
/nfs4exports/Data1 192.168.0.0/24(rw,insecure,no_subtree_check,nohide)
Following advice, I have changed this to:
/Data1/ 192.168.0.0/255.255.255.0 *(rw,sync,insecure,no_all_squash)
That hasn't helped at all.
I'm completely at a loss, and really need to get this connection working again. I've done lots of googling and reading, but just feel to be digging an ever-deeper hole. All help appreciated.
Anne
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square 1. Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's whre the problem is, it seems. Can you please give me a sample line of a known good nfs4 export?
Anne
On Friday 19 Aug 2011 17:23:34 Anne Wilson wrote:
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square
- Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's whre the problem is, it seems. Can you please give me a sample line of a known good nfs4 export?
It's hard to be sure when messages flash by so quickly, but I got the impression that there was something about fstab. Maybe the format required for those lines has changed, too? These are the lines that I guess it is looking at:
/Data1 /nfs4exports/Data1 none bind 0 0 /Data2 /nfs4exports/Data2 none` bind 0 0 /Data3 /nfs4exports/Data3 none bind 0 0 /home /nfs4exports/home none bind 0 0
I think there was something about wrong or missing type. Each of those partitions is defined earlier in fstab and does have the correct type stated.
Anne
On Fri, 2011-08-19 at 17:46 +0100, Anne Wilson wrote:
On Friday 19 Aug 2011 17:23:34 Anne Wilson wrote:
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square
- Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's whre the problem is, it seems. Can you please give me a sample line of a known good nfs4 export?
It's hard to be sure when messages flash by so quickly, but I got the impression that there was something about fstab. Maybe the format required for those lines has changed, too? These are the lines that I guess it is looking at:
/Data1 /nfs4exports/Data1 none bind 0 0 /Data2 /nfs4exports/Data2 none` bind 0 0 /Data3 /nfs4exports/Data3 none bind 0 0 /home /nfs4exports/home none bind 0 0
I think there was something about wrong or missing type. Each of those partitions is defined earlier in fstab and does have the correct type stated.
---- this is obviously intended to be your NFS server (who knows whether this is CentOS or Fedora 14). You can only bind mount something that already exists and maybe it's empty.
does ls -l /Data1 /Data2 /Data3 /home show much of anything?
On the other system (the NFS client), what does it have in fstab?
Craig
On Saturday 20 Aug 2011 03:41:12 Craig White wrote:
On Fri, 2011-08-19 at 17:46 +0100, Anne Wilson wrote:
On Friday 19 Aug 2011 17:23:34 Anne Wilson wrote:
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square 1. Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's whre the problem is, it seems. Can you please give me a sample line of a known good nfs4 export?
It's hard to be sure when messages flash by so quickly, but I got the impression that there was something about fstab. Maybe the format required for those lines has changed, too? These are the lines that I guess it is looking at:
/Data1 /nfs4exports/Data1 none bind 0 0 /Data2 /nfs4exports/Data2 none` bind 0 0 /Data3 /nfs4exports/Data3 none bind 0 0 /home /nfs4exports/home none bind 0 0
I think there was something about wrong or missing type. Each of those partitions is defined earlier in fstab and does have the correct type stated.
this is obviously intended to be your NFS server (who knows whether this is CentOS or Fedora 14).
The server is CentOS 6.
You can only bind mount something that already exists and maybe it's empty.
does ls -l /Data1 /Data2 /Data3 /home show much of anything?
Yes, it lists the contents of each of them.
On the other system (the NFS client), what does it have in fstab?
192.168.0.40:/Data1 /mnt/borg_Data1 nfs4 rsize=8192,wsize=8192,timeo=14,intr 0 0 and equivalents for each of the others.
As I said originally, these lines worked with nfs4 on CentOS 5.
Anne
On Sat, 2011-08-20 at 09:38 +0100, Anne Wilson wrote:
On Saturday 20 Aug 2011 03:41:12 Craig White wrote:
On Fri, 2011-08-19 at 17:46 +0100, Anne Wilson wrote:
On Friday 19 Aug 2011 17:23:34 Anne Wilson wrote:
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square 1. Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's whre the problem is, it seems. Can you please give me a sample line of a known good nfs4 export?
It's hard to be sure when messages flash by so quickly, but I got the impression that there was something about fstab. Maybe the format required for those lines has changed, too? These are the lines that I guess it is looking at:
/Data1 /nfs4exports/Data1 none bind 0 0 /Data2 /nfs4exports/Data2 none` bind 0 0 /Data3 /nfs4exports/Data3 none bind 0 0 /home /nfs4exports/home none bind 0 0
I think there was something about wrong or missing type. Each of those partitions is defined earlier in fstab and does have the correct type stated.
this is obviously intended to be your NFS server (who knows whether this is CentOS or Fedora 14).
The server is CentOS 6.
You can only bind mount something that already exists and maybe it's empty.
does ls -l /Data1 /Data2 /Data3 /home show much of anything?
Yes, it lists the contents of each of them.
On the other system (the NFS client), what does it have in fstab?
192.168.0.40:/Data1 /mnt/borg_Data1 nfs4 rsize=8192,wsize=8192,timeo=14,intr 0 0 and equivalents for each of the others.
As I said originally, these lines worked with nfs4 on CentOS 5.
---- then issuing the command (on the Fedora client)
mount /mnt/borg_Data1 should either work or fail and give you a message (at worst, log to /var/log/messages).
This of course assumes that it isn't already mounted which could be noted by simply issuing a 'mount' command by itself to see what is mounted.
You may have to check /var/log/messages on the CentOS server for clues too.
Craig
On Saturday 20 Aug 2011 12:05:51 Craig White wrote:
On Sat, 2011-08-20 at 09:38 +0100, Anne Wilson wrote:
On Saturday 20 Aug 2011 03:41:12 Craig White wrote:
On Fri, 2011-08-19 at 17:46 +0100, Anne Wilson wrote:
On Friday 19 Aug 2011 17:23:34 Anne Wilson wrote:
On Friday 19 Aug 2011 15:43:23 Tony Schreiner wrote:
NFS v4 problems maybe. Try setting a value for Domain in
/etc/idmapd.conf
on both systems (the same for both).
That gave me an unbootable system. I've removed it, and am back at square 1. Two things -
I should have said that I can access the system from the laptop using ssh + keys.
During bootup I saw many messages about nfs4 exports failing, so that's
whre the problem is, it seems. Can you please give me a sample line
of a known good nfs4 export?
It's hard to be sure when messages flash by so quickly, but I got the impression that there was something about fstab. Maybe the format required for those lines has changed, too? These are the lines that I guess it is looking at:
/Data1 /nfs4exports/Data1 none bind 0 0 /Data2 /nfs4exports/Data2 none` bind 0 0 /Data3 /nfs4exports/Data3 none bind 0 0 /home /nfs4exports/home none bind 0 0
I think there was something about wrong or missing type. Each of those partitions is defined earlier in fstab and does have the correct type stated.
this is obviously intended to be your NFS server (who knows whether this is CentOS or Fedora 14).
The server is CentOS 6.
You can only bind mount something that already exists and maybe it's empty.
does ls -l /Data1 /Data2 /Data3 /home show much of anything?
Yes, it lists the contents of each of them.
On the other system (the NFS client), what does it have in fstab?
192.168.0.40:/Data1 /mnt/borg_Data1 nfs4 rsize=8192,wsize=8192,timeo=14,intr 0
0
and equivalents for each of the others.
As I said originally, these lines worked with nfs4 on CentOS 5.
then issuing the command (on the Fedora client)
mount /mnt/borg_Data1 should either work or fail and give you a message (at worst, log to /var/log/messages).
This of course assumes that it isn't already mounted which could be noted by simply issuing a 'mount' command by itself to see what is mounted.
You may have to check /var/log/messages on the CentOS server for clues too.
Every attempt to mount was simply hanging - so no help at all. However, as you will have seen by now, the problem is solved. I was right that I had missed some steps, and you were right that the mount points at the server end were not correctly set up. The guide on http://www.crazysquirrel.com/computing/debian/servers/setting-up-nfs4.jspx has got everything working again.
Thanks for trying to help.
Anne
On Sat, 20 Aug 2011, Anne Wilson wrote:
Every attempt to mount was simply hanging - so no help at all. However, as you will have seen by now, the problem is solved. I was right that I had missed some steps, and you were right that the mount points at the server end were not correctly set up. The guide on http://www.crazysquirrel.com/computing/debian/servers/setting-up-nfs4.jspx has got everything working again.
Thanks for trying to help.
I'd also suggest that you'd be better to not have these mounted directly from fstab. Make a simple automounter map for these and your life is all round less troublesome. You'll not suffer anywhere near as badly when an nfs mount is unavailable, and it'll recover gracefully once it's available again.
jh
On Saturday 20 Aug 2011 12:45:17 John Hodrien wrote:
On Sat, 20 Aug 2011, Anne Wilson wrote:
Every attempt to mount was simply hanging - so no help at all. However, as you will have seen by now, the problem is solved. I was right that I had missed some steps, and you were right that the mount points at the server end were not correctly set up. The guide on http://www.crazysquirrel.com/computing/debian/servers/setting-up-nfs4.jsp x has got everything working again.
Thanks for trying to help.
I'd also suggest that you'd be better to not have these mounted directly from fstab. Make a simple automounter map for these and your life is all round less troublesome. You'll not suffer anywhere near as badly when an nfs mount is unavailable, and it'll recover gracefully once it's available again.
Hi, John. That sounds really useful, particularly on the netbook where I have to remember to disable the mounts before travelling. The only problem is, I don't know how to do that. Can you either describe it to me or point me to suitable reading? Thanks
Anne
On Sat, 20 Aug 2011, Anne Wilson wrote:
Hi, John. That sounds really useful, particularly on the netbook where I have to remember to disable the mounts before travelling. The only problem is, I don't know how to do that. Can you either describe it to me or point me to suitable reading? Thanks
Basically the automounter will just step in and mount things when you try to access files within the directory.
http://www.linux-consulting.com/Amd_AutoFS/autofs.html
That probably tells you everything you need, but I'll just note the basics.
Basically you can have:
/etc/auto.master:
/remote /etc/auto.remote
/etc/auto.remote:
somemount -rw,intr,rsize=32768,wsize=32768,udp nfsserver:/blah/blah someothermount -rw,intr,rsize=32768,wsize=32768,udp nfsserver:/foo/foo
chkconfig autofs on service autofs start
Then you should be able to do:
cd /remote/somemount
When you do that, autofs will mount the share.
There's a lot more you can do, you really do need to read the documentation. Executable automount maps and ldap based maps really give you a lot of flexibility on how you can use it, but you probably need something very simple.
jh
On Saturday 20 Aug 2011 17:58:13 John Hodrien wrote:
On Sat, 20 Aug 2011, Anne Wilson wrote:
Hi, John. That sounds really useful, particularly on the netbook where I have to remember to disable the mounts before travelling. The only problem is, I don't know how to do that. Can you either describe it to me or point me to suitable reading? Thanks
Basically the automounter will just step in and mount things when you try to access files within the directory.
http://www.linux-consulting.com/Amd_AutoFS/autofs.html
That probably tells you everything you need, but I'll just note the basics.
Basically you can have:
/etc/auto.master:
/remote /etc/auto.remote
/etc/auto.remote:
somemount -rw,intr,rsize=32768,wsize=32768,udp nfsserver:/blah/blah someothermount -rw,intr,rsize=32768,wsize=32768,udp nfsserver:/foo/foo
chkconfig autofs on service autofs start
Then you should be able to do:
cd /remote/somemount
When you do that, autofs will mount the share.
There's a lot more you can do, you really do need to read the documentation. Executable automount maps and ldap based maps really give you a lot of flexibility on how you can use it, but you probably need something very simple.
Thanks. Plenty to read, then :-)
Anne
On Aug 19, 2011, at 10:39 AM, Anne Wilson wrote:
I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages stored so that I can quote accurately?).
I have temporarily disabled both the firewall and selinux, and the problem persists, so clearly they are not the cause. Logwatch has the following section which may or may not be connected:
--------------------- Connections (secure-log) Begin
Userhelper executed applications: anne -> system-config-users as root: 1 Time(s)
**Unmatched Entries** polkitd(authority=local): Operator of unix- session:/org/freedesktop/ConsoleKit/Session2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.fedoraproject.config.firewall.auth for system-bus-name::1.88 [/usr/bin/python /usr/bin/system-config-firewall] (owned by unix- user:anne): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session2 (system bus name :1.45 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session6 (system bus name :1.214, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8) (disconnected from bus): 1 Time(s)
---------------------- Connections (secure-log) End
An example fstab line is
/Data1 /nfs4exports/Data1 none bind 0 0
Under CentOS 5 this was mounted by the exports line:
/nfs4exports/Data1 192.168.0.0/24(rw,insecure,no_subtree_check,nohide)
Following advice, I have changed this to:
/Data1/ 192.168.0.0/255.255.255.0 *(rw,sync,insecure,no_all_squash)
That hasn't helped at all.
I'm completely at a loss, and really need to get this connection working again. I've done lots of googling and reading, but just feel to be digging an ever-deeper hole. All help appreciated.
Anne
I didn't read your original post carefully enough the first time.
You show the exports file, but nowhere do I see a reference of how the client is mounting the export from the server. THe bind mounts above are remounting a local file system in a different location, they do not mount an NFS share from an external server. Usually it looks something like this:
server:/share /local/mount nfs defaults 0 0
(obviously defaults can instead be specific options)
On Friday 19 Aug 2011 15:39:12 Anne Wilson wrote:
I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages stored so that I can quote accurately?).
I have temporarily disabled both the firewall and selinux, and the problem persists, so clearly they are not the cause. Logwatch has the following section which may or may not be connected:
--------------------- Connections (secure-log) Begin
Userhelper executed applications: anne -> system-config-users as root: 1 Time(s)
**Unmatched Entries** polkitd(authority=local): Operator of unix- session:/org/freedesktop/ConsoleKit/Session2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.fedoraproject.config.firewall.auth for system-bus-name::1.88 [/usr/bin/python /usr/bin/system-config-firewall] (owned by unix-user:anne): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8): 1 Time(s) polkitd(authority=local): Registered Authentication Agent for session /org/freedesktop/ConsoleKit/Session2 (system bus name :1.45 [/usr/libexec/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session1 (system bus name :1.24, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus): 1 Time(s) polkitd(authority=local): Unregistered Authentication Agent for session /org/freedesktop/ConsoleKit/Session6 (system bus name :1.214, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_GB.utf8) (disconnected from bus): 1 Time(s)
---------------------- Connections (secure-log) End
An example fstab line is
/Data1 /nfs4exports/Data1 none bind 0 0
Under CentOS 5 this was mounted by the exports line:
/nfs4exports/Data1 192.168.0.0/24(rw,insecure,no_subtree_check,nohide)
Following advice, I have changed this to:
/Data1/ 192.168.0.0/255.255.255.0 *(rw,sync,insecure,no_all_squash)
That hasn't helped at all.
I'm completely at a loss, and really need to get this connection working again. I've done lots of googling and reading, but just feel to be digging an ever-deeper hole. All help appreciated.
I was certain I had missed some steps in setting up the exports, but simply could not remember them. Nor could I find the guide that got me started before. This morning I found it. I cannot recommend this guide too highly - so you might like to bookmark it for a reference sheet - for next time someone asks you for help :-)
http://www.crazysquirrel.com/computing/debian/servers/setting-up-nfs4.jspx
Thanks, everyone, for trying to help.
Anne
I was certain I had missed some steps in setting up the exports, but simply could not remember them. Nor could I find the guide that got me started before. This morning I found it. I cannot recommend this guide too highly - so you might like to bookmark it for a reference sheet - for next time someone asks you for help :-)
http://www.crazysquirrel.com/computing/debian/servers/setting-up-nfs4.jspx
Thanks, everyone, for trying to help.
Just one thing to note... RHEL6/CentOS6 no longer requires the bind mounts or fsid=0 on the NFS host... the system now defaults to NFS4 being tried first and does some stuff in the background so that the bindings and fsid=0 is not required... in principle (barring nfs4 specific options) the same exportfs line can be used for nfs3 or nfs4.... this is a change from 5.X... I thought it was in the release notes, technical notes or migration guide but I can't locate the relevant entry now...
-
Anne Wilson -
Craig White -
James Hogarth -
John Hodrien -
Tony Schreiner