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Reviewed:  https://review.opendev.org/661042
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=959af761cb1197bbeaed4ba1f0c3e5ef4aba3ee1
Submitter: Zuul
Branch:    master

commit 959af761cb1197bbeaed4ba1f0c3e5ef4aba3ee1
Author: Slawek Kaplonski <skaplons@xxxxxxxxxx>
Date:   Thu May 23 17:08:56 2019 +0200

    [Functional tests] Test keepalived in namespaces
    
    Functional tests for keepalived should spawn processes in namespaces
    where dummy interfaces used in keepalived.conf file exists.
    Otherwise keepalived 2.0.10 (this is version used currently in RHEL 8)
    fails to start and tests are failing.
    
    On older versions of keepalived, like 1.3.9 used in Ubuntu 18.04,
    keepalived is logging warning about not existing interfaces but it's
    starting fine thus tests are running properly.
    
    So this patch adds creation of namespace for each test from
    neutron.tests.functional.agent.linux.test_keepalived module,
    creates dummy interfaces with names used in keepalived config file
    and runs keepalive process in this namespace.
    
    Change-Id: I54f45b8c52fc1ecce811b028f0f92e0d78d3157b
    Closes-Bug: #1830232


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1830232

Title:
  [Functional tests] Keepalived fails to start when not existing
  interfaces are set in config file

Status in neutron:
  Fix Released

Bug description:
  It looks that when not existing interfaces are given in
  keepalived.conf file, keepalived may not start properly.

  I saw that when running functional tests from module neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase on RHEL 8 where keepalived 2.0.10 is used.
  I saw in logs something like:

  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: Registering Kernel netlink reflector
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: Registering Kernel netlink command channel
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: Opening file '/tmp/tmpo_he5agd/tmpnhyku1i8/router1/keepalived.conf'.
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 7) WARNING - interface eth0 for vrrp_instance VR_1 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 17) (VR_1) tracked interface eth0 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 20) WARNING - interface eth0 for ip address 169.254.0.1/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 23) WARNING - interface eth1 for ip address 192.168.1.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 24) WARNING - interface eth2 for ip address 192.168.2.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 25) WARNING - interface eth2 for ip address 192.168.3.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 26) WARNING - interface eth10 for ip address 192.168.55.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 29) WARNING - interface eth1 for VROUTE nexthop doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 34) WARNING - interface eth4 for vrrp_instance VR_2 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 40) (VR_2) tracked interface eth4 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 43) WARNING - interface eth4 for ip address 169.254.0.2/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 46) WARNING - interface eth2 for ip address 192.168.2.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 47) WARNING - interface eth6 for ip address 192.168.3.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: (Line 48) WARNING - interface eth10 for ip address 192.168.55.0/24 doesn't exist
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: Non-existent interface specified in configuration
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived_vrrp[11267]: Stopped - used 0.000608 user time, 0.000000 system time
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived[11266]: Keepalived_vrrp exited with permanent error CONFIG. Terminating
  maj 23 10:10:16 de208a364e0f82ba5124812fa88cfd47-tester-0 Keepalived[11266]: Stopped Keepalived v2.0.10 (11/12,2018)

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