Public bug reported:
The bionic-rocky deployment fails to allocate DHCP to new instances:
neutron/neutron-dhcp-agent.log:2018-09-17 07:08:01.432 190830 ERROR
neutron.agent.dhcp.agent [-] Unable to enable dhcp for ade593b1-153b-
47b8-84a9-009fca692003.: OSError: [Errno 22] failed to open netns
This can be tracked to the pyroute2 package, where it is simply
executing:
pyroute2.NetNS("qdhcp-UUID", flags=0")
While the namespace is visible with the "ip netns" command, the pyroute2
method fails (and this is with either python 2.7 or 3.?) with OSError
22, and this associated syscall:
[pid 51036] openat(AT_FDCWD,
"/var/run/netns/qdhcp-ade593b1-153b-47b8-84a9-009fca692003", O_RDONLY) = 4
[pid 51036] tee(4, 1073741824, 17109518126325597131, 0xaa7bac30 /* SPLICE_F_???
*/) = -1 EINVAL (Invalid argument)
This is specific to s390x, and does not occur on bionic-queens, only
using the bionic-rocky cloud archive. These archives do not contain
different versions of pyroute2 so this seems unlikely to be the issue.
Downgrading openvswitch to the bionic-queens version (2.10.0-0ubuntu2
--> 2.9.0-0ubuntu1) did not seem to make a difference but more testing
may be necessary.
A bug has also been logged against pyroute2:
https://github.com/svinota/pyroute2/issues/542
** Affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Affects: pyroute2 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: pyroute2 (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- network namespace inaccessible via pyroute2 package to charms with
bionic-rocky cloud-archive
+ OSError: [Errno 22] failed to open netns (bionic-rocky)
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https://bugs.launchpad.net/bugs/1792947
Title:
OSError: [Errno 22] failed to open netns (bionic-rocky)
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