Public bug reported:
Description
===========
After installing Openstack in Ubuntu 18.04 and using LXC as
virtualization engine, the creation of an instance fails with a log in
`nova-compute.log` reporting that:
```Instance failed to spawn: TypeError: mount() takes exactly 4
arguments (3 given)```
Extra analysis of the logs an code points towards this file of `python-
nova` package:
/usr/lib/python2.7/dist-packages/nova/virt/disk/mount/api.py
The problem seems that the call at line 251
```
246 def mnt_dev(self):
247 """Mount the device into the file system."""
248 LOG.debug("Mount %(dev)s on %(dir)s",
249 {'dev': self.mapped_device, 'dir': self.mount_dir})
250 out, err = nova.privsep.fs.mount(None, self.mapped_device,
251 self.mount_dir)
252 if err:
253 self.error = _('Failed to mount filesystem: %s') % err
254 LOG.debug(self.error)
255 return False
256
257 self.mounted = True
258 return True
```
is not matching the function signature defined in /usr/lib/python2.7
/dist-packages/nova/privsep/fs.py as:
```
30 def mount(fstype, device, mountpoint, options):
31 mount_cmd = ['mount']
32 if fstype:
33 mount_cmd.extend(['-t', fstype])
34 if options is not None:
35 mount_cmd.extend(options)
36 mount_cmd.extend([device, mountpoint])
37 return processutils.execute(*mount_cmd)
```
So, it should be safe just to add `None` as `options` parameter.
Steps to reproduce
==================
Environment info:
OS: Ubuntu 18.04.2 LTS
Kernel: Linux 4.15.0-46-generic #49-Ubuntu SMP x86_64
Openstack: queens
Related packages versions:
nova-api: Installed: 2:17.0.9-0ubuntu1
python-nova: Installed: 2:17.0.9-0ubuntu1
nova-compute: Installed: 2:17.0.9-0ubuntu1
nova-compute-lxc: Installed: 2:17.0.9-0ubuntu1
Command executed to create the instance:
```
# openstack server create --flavor lxc.small --image lxc_ubuntu_18.04 --nic
net-id=${NEUTRON_NETWORK_NAT_ID} --security-group default --key-name vagrant
test_lxc_instance
+-------------------------------------+---------------------------------------------------------+
| Field | Value
|
+-------------------------------------+---------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL
|
| OS-EXT-AZ:availability_zone |
|
| OS-EXT-SRV-ATTR:host | None
|
| OS-EXT-SRV-ATTR:hypervisor_hostname | None
|
| OS-EXT-SRV-ATTR:instance_name |
|
| OS-EXT-STS:power_state | NOSTATE
|
| OS-EXT-STS:task_state | scheduling
|
| OS-EXT-STS:vm_state | building
|
| OS-SRV-USG:launched_at | None
|
| OS-SRV-USG:terminated_at | None
|
| accessIPv4 |
|
| accessIPv6 |
|
| addresses |
|
| adminPass | GhYewcoXch3w
|
| config_drive |
|
| created | 2019-05-17T10:00:57Z
|
| flavor | lxc.small (0)
|
| hostId |
|
| id | fe69997d-10c2-4850-bdba-2468da7148d6
|
| image | lxc_ubuntu_18.04
(de3ca120-42f6-47a2-be1b-65c7276f1566) |
| key_name | vagrant
|
| name | test_lxc_instance
|
| progress | 0
|
| project_id | 4c2cf8fa37c8451d87ddd2cf28cfd6bc
|
| properties |
|
| security_groups |
name='35a8788c-364b-4da3-9c26-4aebf0ac04c4' |
| status | BUILD
|
| updated | 2019-05-17T10:00:57Z
|
| user_id | 0d48615bb8c747f4b5ec5bfc693b6832
|
| volumes_attached |
|
+-------------------------------------+---------------------------------------------------------+
```
Expected result
===============
```
# openstack server list
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
| ID | Name | Status | Networks
| Image | Flavor |
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
| dac7b2b8-841b-4a16-a54f-2d5177f05934 | test_lxc_instance | ACTIVE |
nat=10.123.1.11 | lxc_ubuntu_18.04 | lxc.small |
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
```
Actual result
=============
```
# openstack server list
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
| ID | Name | Status | Networks
| Image | Flavor |
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
| fe69997d-10c2-4850-bdba-2468da7148d6 | test_lxc_instance | ERROR |
| lxc_ubuntu_18.04 | lxc.small |
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
```
Logs
====
Included some logs generated during the command, and retrieved using:
```
grep -r "2019-05-17 10:0[01]" /var/log >>
openstack_queens_lxc_instance_creation_mount_error.logs
```
** Affects: nova
Importance: Undecided
Assignee: Miguel Ángel Herranz Trillo (maherranzt)
Status: In Progress
** Attachment added: "openstack_queens_lxc_instance_creation_mount_error.logs"
https://bugs.launchpad.net/bugs/1829506/+attachment/5264452/+files/openstack_queens_lxc_instance_creation_mount_error.logs
--
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1829506
Title:
Error mounting device on create instance (LXC)
Status in OpenStack Compute (nova):
In Progress
Bug description:
Description
===========
After installing Openstack in Ubuntu 18.04 and using LXC as
virtualization engine, the creation of an instance fails with a log in
`nova-compute.log` reporting that:
```Instance failed to spawn: TypeError: mount() takes exactly 4
arguments (3 given)```
Extra analysis of the logs an code points towards this file of
`python-nova` package:
/usr/lib/python2.7/dist-packages/nova/virt/disk/mount/api.py
The problem seems that the call at line 251
```
246 def mnt_dev(self):
247 """Mount the device into the file system."""
248 LOG.debug("Mount %(dev)s on %(dir)s",
249 {'dev': self.mapped_device, 'dir':
self.mount_dir})
250 out, err = nova.privsep.fs.mount(None,
self.mapped_device,
251 self.mount_dir)
252 if err:
253 self.error = _('Failed to mount filesystem: %s') %
err
254 LOG.debug(self.error)
255 return False
256
257 self.mounted = True
258 return True
```
is not matching the function signature defined in /usr/lib/python2.7
/dist-packages/nova/privsep/fs.py as:
```
30 def mount(fstype, device, mountpoint, options):
31 mount_cmd = ['mount']
32 if fstype:
33 mount_cmd.extend(['-t', fstype])
34 if options is not None:
35 mount_cmd.extend(options)
36 mount_cmd.extend([device, mountpoint])
37 return processutils.execute(*mount_cmd)
```
So, it should be safe just to add `None` as `options` parameter.
Steps to reproduce
==================
Environment info:
OS: Ubuntu 18.04.2 LTS
Kernel: Linux 4.15.0-46-generic #49-Ubuntu SMP x86_64
Openstack: queens
Related packages versions:
nova-api: Installed: 2:17.0.9-0ubuntu1
python-nova: Installed: 2:17.0.9-0ubuntu1
nova-compute: Installed: 2:17.0.9-0ubuntu1
nova-compute-lxc: Installed: 2:17.0.9-0ubuntu1
Command executed to create the instance:
```
# openstack server create --flavor lxc.small --image lxc_ubuntu_18.04 --nic
net-id=${NEUTRON_NETWORK_NAT_ID} --security-group default --key-name vagrant
test_lxc_instance
+-------------------------------------+---------------------------------------------------------+
| Field | Value
|
+-------------------------------------+---------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL
|
| OS-EXT-AZ:availability_zone |
|
| OS-EXT-SRV-ATTR:host | None
|
| OS-EXT-SRV-ATTR:hypervisor_hostname | None
|
| OS-EXT-SRV-ATTR:instance_name |
|
| OS-EXT-STS:power_state | NOSTATE
|
| OS-EXT-STS:task_state | scheduling
|
| OS-EXT-STS:vm_state | building
|
| OS-SRV-USG:launched_at | None
|
| OS-SRV-USG:terminated_at | None
|
| accessIPv4 |
|
| accessIPv6 |
|
| addresses |
|
| adminPass | GhYewcoXch3w
|
| config_drive |
|
| created | 2019-05-17T10:00:57Z
|
| flavor | lxc.small (0)
|
| hostId |
|
| id | fe69997d-10c2-4850-bdba-2468da7148d6
|
| image | lxc_ubuntu_18.04
(de3ca120-42f6-47a2-be1b-65c7276f1566) |
| key_name | vagrant
|
| name | test_lxc_instance
|
| progress | 0
|
| project_id | 4c2cf8fa37c8451d87ddd2cf28cfd6bc
|
| properties |
|
| security_groups |
name='35a8788c-364b-4da3-9c26-4aebf0ac04c4' |
| status | BUILD
|
| updated | 2019-05-17T10:00:57Z
|
| user_id | 0d48615bb8c747f4b5ec5bfc693b6832
|
| volumes_attached |
|
+-------------------------------------+---------------------------------------------------------+
```
Expected result
===============
```
# openstack server list
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
| ID | Name | Status |
Networks | Image | Flavor |
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
| dac7b2b8-841b-4a16-a54f-2d5177f05934 | test_lxc_instance | ACTIVE |
nat=10.123.1.11 | lxc_ubuntu_18.04 | lxc.small |
+--------------------------------------+-------------------+--------+-----------------+------------------+-----------+
```
Actual result
=============
```
# openstack server list
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
| ID | Name | Status |
Networks | Image | Flavor |
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
| fe69997d-10c2-4850-bdba-2468da7148d6 | test_lxc_instance | ERROR |
| lxc_ubuntu_18.04 | lxc.small |
+--------------------------------------+-------------------+--------+----------+------------------+-----------+
```
Logs
====
Included some logs generated during the command, and retrieved using:
```
grep -r "2019-05-17 10:0[01]" /var/log >>
openstack_queens_lxc_instance_creation_mount_error.logs
```
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1829506/+subscriptions
--
Mailing list: https://launchpad.net/~yahoo-eng-team
Post to : [email protected]
Unsubscribe : https://launchpad.net/~yahoo-eng-team
More help : https://help.launchpad.net/ListHelp
