Ihar Hrachyshka <ihrac...@redhat.com> wrote:
Ihar Hrachyshka <ihrac...@redhat.com> wrote:
Sean M. Collins <s...@coreitpro.com> wrote:
Just a quick update where we are:
Increasing the verbosity of the SSH session into the instance that is
created during the cinder portion is showing that we are actually
connecting to the instance successfully. We get the dropbear SSH banner,
but then the instance hangs. Eventually SSH terminates the connection, 5
minutes later.
http://logs.openstack.org/35/187235/12/experimental/gate-grenade-dsvm-neutron-multinode/984e651/logs/grenade.sh.txt.gz#_2016-01-08_20_13_40_040
As per [1], could be related to mtu on the interface. Do we configure
MTU on external devices to accommodate for tunnelling headers?
As per [2] neutron server logs, the network in question is vxlan.
If that’s indeed the mtu issue, and since Cirros does not support DHCP
MTU option documented for ml2 at [3], I don’t know how to validate
whether it’s indeed the issue.
UPD: ^ that’s actually not true, cirros supports the option since 0.3.3
[1] (and we use 0.3.4 [2]), so let’s try to enforce it inside neutron and
see whether it helps: https://review.openstack.org/265759
UPD: seems like enforcing instance mtu to 1400 indeed makes us pass forward
into tempest:
http://logs.openstack.org/59/265759/3/experimental/gate-grenade-dsvm-neutron-multinode/a167a59/console.html
And there are only three failures there:
http://logs.openstack.org/59/265759/3/experimental/gate-grenade-dsvm-neutron-multinode/a167a59/console.html#_2016-01-11_11_58_47_945
I also don’t see any RPC versioning related traces in service logs, which
is a good sign.
[1] https://bugs.launchpad.net/cirros/+bug/1301958
[2]
http://logs.openstack.org/35/187235/11/experimental/gate-grenade-dsvm-neutron-multinode/a5af283/logs/grenade.sh.txt.gz#_2015-11-30_18_57_46_067
Also, what’s the underlying infrastructure that is available in gate?
Does it allow vlan for tenant networks? (We could enforce vlan for the
network and see whether it fixes the issue.)
[1] https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1254085
[2]
http://logs.openstack.org/35/187235/11/experimental/gate-grenade-dsvm-neutron-multinode/a5af283/logs/old/screen-q-svc.txt.gz#_2015-11-30_19_28_44_685
[3]
https://access.redhat.com/documentation/en/red-hat-enterprise-linux-openstack-platform/7/networking-guide/chapter-16-configure-mtu-settings
Ihar
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