Bug 1580480
| Summary: | ironic-dbsync.log has errors related to loading classic drivers and pysnmp_mibs | ||||||
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| Product: | Red Hat OpenStack | Reporter: | Bob Fournier <bfournie> | ||||
| Component: | python-proliantutils | Assignee: | Ilya Etingof <ietingof> | ||||
| Status: | CLOSED ERRATA | QA Contact: | mlammon | ||||
| Severity: | low | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 13.0 (Queens) | CC: | bfournie, hbrock, ietingof, joflynn, jschluet, jslagle, jtrowbri, mburns, srevivo | ||||
| Target Milestone: | z2 | Keywords: | Triaged, ZStream | ||||
| Target Release: | 13.0 (Queens) | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | python-proliantutils-2.5.0-4.el7ost | Doc Type: | Bug Fix | ||||
| Doc Text: |
When the ironic-dbsync utility tried to load the ironic drivers and when a driver imported the proliantutils.ilo client module, the proliantutils library tried to load all of the pysnmp MIBs. If the ironic-dbsync process resided in an unreadable CWD, pysnmp failed when trying to search for MIBs in CWD. This results in the following error messages in ironic-dbsync.log on deployment: Unable to load classic driver fake_drac: MIB file pysnmp_mibs/CPQIDA-MIB.pyc access error: [Errno 13] Permission denied: 'pysnmp_mibs': MibLoadError: MIB file pysnmp_mibs/CPQIDA-MIB.pyc access error: [Errno 13] Permission denied: 'pysnmp_mibs'
An update to proliantutils ensures that pysnmp does not load all MIBs on module import. This avoids the situation when an MIB search is attempted prior to the moment of being explicitly requested by the application.
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Story Points: | --- | ||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2018-08-29 16:32:35 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Just to share my thoughts on this...
It seems that this business has something to do with the `proliantutils` package. Whilst migrating the database, ironic tries to load its drivers. Whenever a driver imports `proliantutils.ilo.client` while being in an unreadable CWD, pysnmp fails on EACCESS.
Here is a quite artificial but concise reproducer:
[stack@host01 ~]$ cd /tmp/unreadable/
[stack@host01 unreadable]$ chmod 666 .
[stack@host01 unreadable]$ python -c 'import proliantutils.ilo.client'
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/python2.7/site-packages/proliantutils/ilo/client.py", line 21, in <module>
from proliantutils.ilo.snmp import snmp_cpqdisk_sizes as snmp
File "/usr/lib/python2.7/site-packages/proliantutils/ilo/snmp/snmp_cpqdisk_sizes.py", line 33, in <module>
mibBuilder = mBuilder.loadModules('CPQIDA-MIB', 'CPQSCSI-MIB')
File "/usr/lib/python2.7/site-packages/pysnmp/smi/builder.py", line 337, in loadModules
self.loadModule(modName, **userCtx)
File "/usr/lib/python2.7/site-packages/pysnmp/smi/builder.py", line 283, in loadModule
modData, sfx = mibSource.read(modName)
File "/usr/lib/python2.7/site-packages/pysnmp/smi/builder.py", line 68, in read
pycData = self._getData(f + pycSfx, pycMode)
File "/usr/lib/python2.7/site-packages/pysnmp/smi/builder.py", line 211, in _getData
raise error.MibLoadError('MIB file %s access error: %s' % (p, why))
pysnmp.smi.error.MibLoadError: MIB file pysnmp_mibs/CPQIDA-MIB.pyc access error: [Errno 13] Permission denied: 'pysnmp_mibs'
I believe that `proliantutils` could be patched up not to load MIBs on import as well as not to search for `pysnmp-mibs` which is likely to be absent on the system (proliantutils carries its own copy of these MIBs).
On the other hand, is it that `ironic-dbsync` is being invoked from an unreadable directory? The easiest immediate (and dirty) fix perhaps would be to make CWD readable...
Just moving back to to ON_DEV until patch merges in stable/queens since this is targeted to 13.z. Forgot there were no branches for proliantutils, moving back to POST. Deployed osp13 UC + OC (3 controller, 2 compute, 3 ceph) using puddle 2018-08-03.3 Environment: python-proliantutils-2.5.0-4.el7ost.noarch Could not duplicate issue. No errors or warnings as described in description. This bug is marked for inclusion in the errata but does not currently contain draft documentation text. To ensure the timely release of this advisory please provide draft documentation text for this bug as soon as possible. If you do not think this bug requires errata documentation, set the requires_doc_text flag to "-". To add draft documentation text: * Select the documentation type from the "Doc Type" drop down field. * A template will be provided in the "Doc Text" field based on the "Doc Type" value selected. Enter draft text in the "Doc Text" field. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:2573 |
Created attachment 1439644 [details] ironic-dbsync.log Description of problem: Following a deployment the ironic-dbsync.log has these error messages: ironic/ironic-dbsync.log:2018-04-12 14:35:39.947 23662 WARNING ironic.common.driver_factory [req-75bb0eae-6c3e-47b3-afe1-5a2b91a04d5b - - - - -] Unable to load classic driver fake_drac: MIB file pysnmp_mibs/CPQIDA-MIB.pyc access error: [Errno 13] Permission denied: 'pysnmp_mibs': MibLoadError: MIB file pysnmp_mibs/CPQIDA-MIB.pyc access error: [Errno 13] Permission denied: 'pysnmp_mibs' This does not appear to be causing any functional problems. Version-Release number of selected component (if applicable): (undercloud) [stack@host01 log]$ rpm -qa | grep ironic openstack-ironic-conductor-10.1.2-0.20180326121311.ef08927.el7ost.noarch puppet-ironic-12.3.1-0.20180326225303.3956a4c.el7ost.noarch python-ironic-lib-2.12.0-1.el7ost.noarch openstack-ironic-common-10.1.2-0.20180326121311.ef08927.el7ost.noarch openstack-ironic-api-10.1.2-0.20180326121311.ef08927.el7ost.noarch python2-ironicclient-2.2.0-1.el7ost.noarch (undercloud) [stack@host01 log]$ rpm -qa | grep pysnmp python-pysnmp-4.3.2-3.el7ost.noarch How reproducible: Seems to be logged each deployment.