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Public bug reported:

Stderr: u'mount.nfs: /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68 is busy or already mounted\n'
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Traceback (most recent call last):
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2438, in _build_and_run_instance
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     block_device_info=block_device_info)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3550, in spawn
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     mdevs=mdevs)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 6157, in _get_guest_xml
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     context, mdevs)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5820, in _get_guest_config
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     flavor, guest.os_type)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4580, in _get_guest_storage_config
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     self._connect_volume(context, connection_info, instance)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 1650, in _connect_volume
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     vol_driver.connect_volume(connection_info, instance)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/fs.py", line 117, in connect_volume
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     self._mount_options(connection_info))
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/mount.py", line 411, in mount
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     options)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/mount.py", line 307, in mount
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     nova.privsep.fs.mount(fstype, export, mountpoint, options)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/oslo_privsep/priv_context.py", line 245, in _wrap
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     return self.channel.remote_call(name, args, kwargs)
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/oslo_privsep/daemon.py", line 224, in remote_call
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     raise exc_type(*result[2])
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] ProcessExecutionError: Unexpected error while running command.
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Command: mount -t nfs 192.168.130.203:/data/file01 /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Exit code: 32
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Stdout: u''
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Stderr: u'mount.nfs: /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68 is busy or already mounted\n'
2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]
-----------------
solvle methed:


modifild class LibvirtMountedFileSystemVolumeDriver(LibvirtBaseFileSystemVolumeDriver) `s function connect_volume：

    def connect_volume(self, connection_info, instance):
        """Connect the volume."""
        export = connection_info['data']['export']
        vol_name = connection_info['data']['name']
        mountpoint = self._get_mount_path(connection_info)
        if not os.path.isfile(mountpoint):   #isdir exist?
           mount.mount(self.fstype, export, vol_name, mountpoint, instance, self._mount_options(connection_info))
        connection_info['data']['device_path'] = \
            self._get_device_path(connection_info)

** Affects: openstack-i18n
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1908379

Title:
  cinder use backend nfs,nova report error

Status in openstack i18n:
  New

Bug description:
  Stderr: u'mount.nfs: /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68 is busy or already mounted\n'
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Traceback (most recent call last):
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2438, in _build_and_run_instance
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     block_device_info=block_device_info)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3550, in spawn
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     mdevs=mdevs)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 6157, in _get_guest_xml
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     context, mdevs)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5820, in _get_guest_config
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     flavor, guest.os_type)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4580, in _get_guest_storage_config
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     self._connect_volume(context, connection_info, instance)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 1650, in _connect_volume
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     vol_driver.connect_volume(connection_info, instance)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/fs.py", line 117, in connect_volume
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     self._mount_options(connection_info))
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/mount.py", line 411, in mount
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     options)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/volume/mount.py", line 307, in mount
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     nova.privsep.fs.mount(fstype, export, mountpoint, options)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/oslo_privsep/priv_context.py", line 245, in _wrap
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     return self.channel.remote_call(name, args, kwargs)
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]   File "/usr/lib/python2.7/site-packages/oslo_privsep/daemon.py", line 224, in remote_call
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]     raise exc_type(*result[2])
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] ProcessExecutionError: Unexpected error while running command.
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Command: mount -t nfs 192.168.130.203:/data/file01 /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Exit code: 32
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Stdout: u''
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743] Stderr: u'mount.nfs: /var/lib/nova/mnt/e1bda570eff9a173b2d193986ed9bd68 is busy or already mounted\n'
  2020-12-16 16:33:27.084 79881 ERROR nova.compute.manager [instance: 14b8c2c2-29c9-4fa3-a13b-1b3cdc57b743]
  -----------------
  solvle methed:

  
  modifild class LibvirtMountedFileSystemVolumeDriver(LibvirtBaseFileSystemVolumeDriver) `s function connect_volume：

      def connect_volume(self, connection_info, instance):
          """Connect the volume."""
          export = connection_info['data']['export']
          vol_name = connection_info['data']['name']
          mountpoint = self._get_mount_path(connection_info)
          if not os.path.isfile(mountpoint):   #isdir exist?
             mount.mount(self.fstype, export, vol_name, mountpoint, instance, self._mount_options(connection_info))
          connection_info['data']['device_path'] = \
              self._get_device_path(connection_info)

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