Metadata via the DHCP namespace

This is a follow-on from the previous post that described how metadata requests go from instances to the Nova metadata service via a namespace proxy in a Quantum router namespace. This post shows how requests can go via a namespace proxy in a DHCP namespace instead.

Dnsmasq logging and options for the Quantum DHCP agent

Dnsmasq logs to syslog by default when the Quantum DHCP agent is configured to use it as the DHCP driver. This fills the syslog on the network node very quickly with dnsmasq messages - a request and reply line once per minute per instance when the lease time is the default 120 seconds. This post shows how to make dnsmasq log to a different file, give extra log detail and provide additional DHCP options for the clients.

Debugging Quantum DHCP and Open vSwitch

This post describes how Quantum DHCP in Grizzly works when using the Open vSwitch plugin. A basic understanding of the mechanism is needed to troubleshoot issues.