Neutron check Commands

To list all the virtual routers and dhcp server
>> ip netns ls

[root@neutronww1 ~]# ip netns
qrouter-641ca25a-7832-4818-b7ww5b-559c8f75ba5c
qdhcp-71ed8a34-a2d5-4d84-9dww47-e5e107dd8d7e
qdhcp-35a33370-d641-4dca-9wwdab-4ac2d9ffc7c6
qdhcp-e0b51c09-57dd-4b3a-a1ww1f-c83903d52e4d
qrouter-3b7f1bcc-0c95-47d7-a2ww17-9fe2aef7f0c0
qrouter-ac17d3c5-9bf4-4788-b2www6c-ca8aa249613b
[root@neutron1 ~]#

Here the virtual routers are once which start with extension qrouter and dhcp server are those which start with extension qdhcp.


To get more details about the virtual routers and dhcp server we can use following command

>>[root@n1 ~]# ip netns exec <virtual router/dhcp server IP from ip netns command> <network command>

Examples

ip netns exec qrouter-641ca25a-7832-4818-b7ww5b-559c8f75ba5c ip a
ip netns exec qrouter-641ca25a-7832-4818-b7www5b-559c8f75ba5c ifconfig
ip netns exec qrouter-641ca25a-7832-4818-b7www5b-559c8f75ba5c route -n
ip netns exec qrouter-641ca25a-7832-4818-bwww75b-559c8f75ba5c ping

In the above examples we use the commands like “ip a”, “ifconfig” and “route” to list different parameters of the virtual router and dhcp server.  We can use the route command to add up more routing rules if needed.  There we can use the commands like ip, ifconfig, route, ping etc just as we use it on the physical system. To tweak/troubleshoot the entire system. 

Bridge Interface shown down in Horizon Dashboard @ Openstack

sudo ovs-vsctl br-get-external-id br-ex returns nothing, and so br-ex is excluded from the list of ancillary bridges and so the gateway port always shows as DOWN.
A workaround is to set the bridge-id to br-ex and restart the L2 agent:

ovs-vsctl br-set-external-id br-ex bridge-id br-ex
ovs-vsctl br-set-external-id br-ex-2 bridge-id br-ex-2

Changing qpidd to rabbitmq for Openstack

Stopping qpidd on all server

service qpidd stop

chkconfig qpidd off

Installing packages

yum install ntp rabbitmq-server

Configuring Cluster

On Controller1

yum install ntp rabbitmq-server

chown rabbitmq:rabbitmq /var/lib/rabbitmq/*

chown rabbitmq:rabbitmq /var/lib/rabbitmq/.erlang.cookie

/etc/init.d/rabbitmq-server restart

scp /var/lib/rabbitmq/.erlang.cookie root@controller2:/var/lib/rabbitmq/

On Controller2

yum install ntp rabbitmq-server

yum install ntp rabbitmq-server

rabbitmqctl stop_app

rabbitmqctl join_cluster rabbit@controller1

rabbitmqctl start_app

rabbitmqctl cluster_status

Edit the configuration Files

Comment out the Qpidd entries In all the configuration and enter the below details. As Rabbitmq is default message broker other entries are not needed.

rabbit_host = controller

In Both the controller set the rabbitmq policy as below

rabbitmqctl set_policy HA '^(?!amq\.).*' '{"ha-mode": "all"}'