Comment 7 for bug 1392330

Later I do following:
* singletoning neutron server to the node-1
* enabling debug on node-1
* restarting on node-1 server and agents

some time l3-agent don't create router namespaces:
root@node-1:/var/log/neutron# ip netns
haproxy
root@node-1:/var/log/neutron# neutron l3-agent-list-hosting-router router04
+--------------------------------------+--------+----------------+-------+
| id | host | admin_state_up | alive |
+--------------------------------------+--------+----------------+-------+
| 021bce30-d7da-4143-bc61-0a2995a086ce | node-1 | True | :-) |
+--------------------------------------+--------+----------------+-------+
root@node-1:/var/log/neutron# ip netns
haproxy

but some tome after:

root@node-1:/var/log/neutron# neutron l3-agent-list-hosting-router router04
+--------------------------------------+--------+----------------+-------+
| id | host | admin_state_up | alive |
+--------------------------------------+--------+----------------+-------+
| 021bce30-d7da-4143-bc61-0a2995a086ce | node-1 | True | :-) |
+--------------------------------------+--------+----------------+-------+
root@node-1:/var/log/neutron# ip netns
qrouter-8334420c-818c-4abb-9e78-3a9d12288f1a
qrouter-8dd0cb25-054e-4373-a191-91cb8dbc9c64
haproxy
root@node-1:/var/log/neutron# ip netns exec qrouter-8dd0cb25-054e-4373-a191-91cb8dbc9c64 ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
80: qr-13a0e6db-b0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:91:5e:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.111.1/24 brd 192.168.111.255 scope global qr-13a0e6db-b0
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe91:5e71/64 scope link
       valid_lft forever preferred_lft forever
82: qg-19bc0777-d6: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:10:76:fd brd ff:ff:ff:ff:ff:ff
    inet 10.77.11.130/24 brd 10.77.11.255 scope global qg-19bc0777-d6
       valid_lft forever preferred_lft forever
    inet 10.77.11.138/32 brd 10.77.11.138 scope global qg-19bc0777-d6
       valid_lft forever preferred_lft forever
    inet 10.77.11.139/32 brd 10.77.11.139 scope global qg-19bc0777-d6
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe10:76fd/64 scope link
       valid_lft forever preferred_lft forever
root@node-1:/var/log/neutron# ip netns exec qrouter-8dd0cb25-054e-4373-a191-91cb8dbc9c64 ping 192.168.111.33
PING 192.168.111.33 (192.168.111.33) 56(84) bytes of data.
From 192.168.111.1 icmp_seq=1 Destination Host Unreachable
From 192.168.111.1 icmp_seq=2 Destination Host Unreachable
From 192.168.111.1 icmp_seq=3 Destination Host Unreachable
From 192.168.111.1 icmp_seq=4 Destination Host Unreachable
From 192.168.111.1 icmp_seq=5 Destination Host Unreachable
From 192.168.111.1 icmp_seq=6 Destination Host Unreachable
^C
--- 192.168.111.33 ping statistics ---
9 packets transmitted, 0 received, +6 errors, 100% packet loss, time 8117ms
pipe 3
root@node-1:/var/log/neutron# ip netns exec qrouter-8dd0cb25-054e-4373-a191-91cb8dbc9c64 ping 192.168.111.29
PING 192.168.111.29 (192.168.111.29) 56(84) bytes of data.
From 192.168.111.1 icmp_seq=1 Destination Host Unreachable
From 192.168.111.1 icmp_seq=2 Destination Host Unreachable
From 192.168.111.1 icmp_seq=3 Destination Host Unreachable
From 192.168.111.1 icmp_seq=4 Destination Host Unreachable
From 192.168.111.1 icmp_seq=5 Destination Host Unreachable
From 192.168.111.1 icmp_seq=6 Destination Host Unreachable
^C
--- 192.168.111.29 ping statistics ---
6 packets transmitted, 0 received, +6 errors, 100% packet loss, time 5013ms
pipe 3
root@node-1:/var/log/neutron#