vrouter snat script can fail on update an LBaaS NetNS

[Édouard Thuleau]

vrouter snat script can fail on update an LBaaS NetNS if the Linux netns was not already created on the linux host:

Traceback (most recent call last):
  File "/usr/bin/opencontrail-vrouter-netns", line 9, in <module>
    load_entry_point('opencontrail-vrouter-netns==0.1', 'console_scripts', 'opencontrail-vrouter-netns')()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 446, in main
    vrouter_netns.args.func()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 410, in create
    netns_mgr.set_lbaas()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 131, in set_lbaas
    raise ValueError('Need to create the network namespace before set '
ValueError: Need to create the network namespace before set up the lbaas

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/11846
Submitter: Édouard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/11849
Submitter: Édouard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/11846
Committed: http://github.org/Juniper/contrail-controller/commit/cc61f98cdfd5f289ef3adeab4d3f756d1912fa0a
Submitter: Zuul
Branch: master

commit cc61f98cdfd5f289ef3adeab4d3f756d1912fa0a
Author: Édouard Thuleau <email address hidden>
Date: Fri Jun 19 15:45:32 2015 +0200

[vrouter_netns] Create netns if it's not exist

If the script opencontrail-vrouter-netns is call with the '--uptae'
flag, the Linux network namespace is not initialized before it sets SNAT
or LBaaS stuff on it. So it fails. To resolve that, it create it if it's
not exist.

Change-Id: I74f87f3e7f1ebca1ac664d646d139a4f6eddbf98
Closes-Bug: #1466879

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/13585
Submitter: ?douard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/13585
Committed: http://github.org/Juniper/contrail-controller/commit/2a36949c3caeac3f858cd6137fc75cc2982001c8
Submitter: Zuul
Branch: R2.20

commit 2a36949c3caeac3f858cd6137fc75cc2982001c8
Author: Édouard Thuleau <email address hidden>
Date: Fri Jun 19 15:45:32 2015 +0200

[vrouter_netns] Create netns if it's not exist

If the script opencontrail-vrouter-netns is call with the '--uptae'
flag, the Linux network namespace is not initialized before it sets SNAT
or LBaaS stuff on it. So it fails. To resolve that, it create it if it's
not exist.

Change-Id: I74f87f3e7f1ebca1ac664d646d139a4f6eddbf98
Closes-Bug: #1466879
(cherry picked from commit cc61f98cdfd5f289ef3adeab4d3f756d1912fa0a)