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Re: [Rdo-list] Quantum and lack of connections



On 06/18/2013 09:02 AM, Ofer Blaut wrote:

----- Original Message -----
From: "Gary Kotton"<gkotton redhat com>
To: "Ofer Blaut"<oblaut redhat com>
Cc: rdo-list redhat com
Sent: Tuesday, June 18, 2013 8:58:05 AM
Subject: Re: [Rdo-list] Quantum and lack of connections

On 06/18/2013 08:35 AM, Ofer Blaut wrote:
Hi

I wonder how can i configure quantum network /subnets/ports when L3/DHCP
fails to connect to quantum server.
These are not related. The Quantum service enables the user to configure
the network configuration. The DHCP agent provides the IPAM
implementation and the L3 agent provides the floating IP and routing
support.

I expect that user will have CLI/API errors upon DHCP not connected , and
new IPs will not be allocated
Yes, it would be nice if the user was able to know if there was a
problem, but it is not related at all to the Quantum API. In actual fact
the administrator is able to invoke the command: "quantum agent-list" to
determine if there are any issues with the backiend implementation of
the Quantum API's. The administrator would in turn need to address the
issues.
I don't expect user to check quantum agent-list all the time.
In case DHCP/L3 fails , i think new commands should alert about it
Can it be DHCP will miss it info about restart ?

Please differentiate between a user and an administrator. The user will be able to configure ports, subnets and networks. The administrator is responsible to ensure that the service is up and running. Anyone who will be running a cloud service will need to ensure that they have highly available and redundant dhcp and l3 agents. The way of monitoring this is via the aforementioned command.

You are welcome to check out http://docs.openstack.org/trunk/openstack-network/admin/content/ch_high_avail.html


Ofer


See errors attached http://paste.openstack.org/show/38836/
   From the traces it looks like the l3 agent has successfully connected
to the message broker. The DHCP agent is unable to connect to the
message broker. This may be during the boot process where it may take up
to a minute (this is due to the qpid timeouts)

Ofer

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