aircraft aircraft - 3 years ago 171
Linux Question

mount.nfs: access denied by server while mounting 192.168.8.104:/mnt/sdb/var/lib/glance/images

Before asking this question, I searched the stackoverflow, but the answers no use:
mount: nfs access denied by server

In my VM, I have

sda
,
sdb
hard disk in the VM.

Then VM have ips:
192.168.8.101
,
192.168.8.104
.

When I mount the
sdb
's directory to the VM's directory under
/var
:

[root@ha-node1 sdb]# mount -t nfs 192.168.8.104:/mnt/sdb/var/lib/glance/images /var/lib/glance/images


Get the below error:


mount.nfs: access denied by server while mounting 192.168.8.104:/mnt/sdb/var/lib/glance/images


And the directories under
/mnt
permissions all are perfect.

[root@ha-node1 sdb]# ll -d /mnt/
drwxr-xr-x. 4 root root 26 Jul 26 00:43 /mnt/
[root@ha-node1 sdb]# ll -d /mnt/sdb
drwxr-xr-x 4 root root 4096 Jul 26 10:05 /mnt/sdb
[root@ha-node1 sdb]# ll -d /mnt/sdb/var/
drwxr-xr-x 3 root root 4096 Jul 26 10:05 /mnt/sdb/var/
[root@ha-node1 sdb]# ll -d /mnt/sdb/var/lib/
drwxr-xr-x 3 root root 4096 Jul 26 10:05 /mnt/sdb/var/lib/
[root@ha-node1 sdb]# ll -d /mnt/sdb/var/lib/glance/
drwxr-xr-x 3 root root 4096 Jul 26 10:05 /mnt/sdb/var/lib/glance/
[root@ha-node1 sdb]# ll -d /mnt/sdb/var/lib/glance/images/
drwxr-xr-x 2 root root 4096 Jul 26 10:05 /mnt/sdb/var/lib/glance/images/


The network connection is also ok.

[root@ha-node1 sdb]# ping 192.168.8.104
PING 192.168.8.104 (192.168.8.104) 56(84) bytes of data.
64 bytes from 192.168.8.104: icmp_seq=1 ttl=64 time=0.024 ms
64 bytes from 192.168.8.104: icmp_seq=2 ttl=64 time=0.030 ms
64 bytes from 192.168.8.104: icmp_seq=3 ttl=64 time=0.032 ms
64 bytes from 192.168.8.104: icmp_seq=4 ttl=64 time=0.031 ms


The NFS service works normal :

[root@ha-node1 sdb]# systemctl status nfs.service
‚óŹ nfs-server.service - NFS server and services
Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; enabled; vendor preset: disabled)
Active: active (exited) since Wed 2017-07-26 00:26:23 CST; 11h ago
Process: 1916 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=0/SUCCESS)
Process: 1786 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
Main PID: 1916 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/nfs-server.service

Jul 26 00:26:22 ha-node1 systemd[1]: Starting NFS server and services...
Jul 26 00:26:23 ha-node1 systemd[1]: Started NFS server and services.


In the log I grep the mount:

[root@ha-node1 sdb]# cat /var/log/messages | grep mount
Jul 24 14:44:07 ha-node1 systemd: tmp.mount: Directory /tmp to mount over is not empty, mounting anyway.
Jul 26 00:12:08 ha-node1 systemd: Started dracut pre-mount hook.
Jul 26 00:12:11 ha-node1 systemd: Started dracut mount hook.
Jul 26 00:12:15 ha-node1 systemd: Started Remount Root and Kernel File Systems.
Jul 26 00:23:44 ha-node1 rpc.mountd[4312]: Version 1.3.0 starting
Jul 26 00:26:02 ha-node1 systemd: Started dracut pre-mount hook.
Jul 26 00:26:04 ha-node1 systemd: Started dracut mount hook.
Jul 26 00:26:08 ha-node1 systemd: Started Remount Root and Kernel File Systems.
Jul 26 00:26:22 ha-node1 rpc.mountd[1561]: Version 1.3.0 starting
Jul 26 00:43:03 ha-node1 kernel: EXT4-fs (sdb): mounted filesystem with ordered data mode. Opts: (null)
Jul 26 00:43:13 ha-node1 kernel: EXT4-fs (sdc): mounted filesystem with ordered data mode. Opts: (null)
Jul 26 10:07:03 ha-node1 rpc.mountd[1561]: refused mount request from 192.168.8.104 for /mnt/sdb/var/lib/glance/images (/): not exported


It shows
not exported
, I tried to
exportfs -r
, but no use.

Someone can tell me about this, why I can not NFS mount the sdb to self directory?

wen wen
Answer Source

The directories exported to outer world is controled by file:'/etc/exports ' under linux OS. add: /mnt/sdb/var/lib/glance/images *(rw,sync,no_subtree_check) in that file and try again. This is only a example for you, The access right should be modified accroding exactly requirement. read the manual of exports please.

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