Understanding dnsmasq

Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used for tethering on smartphones and portable hotspots, and to support virtual networking in virtualisation frameworks. When we…

Traffic policing in Running VMs – Openstack

One of the major issued facing by a cloud administrator is to control the traffic in/out in a virtual machine. There is two methods you can control this, first one is to inject a special meta-data into the flavor. Second method is to apply special controls on the virtual interface of a running virtual machine.…

Add Second Interface to a VM – Openstack

Openstack in default spawning a virtual machine with a single Interface. If the customer need another interface, here is the to do. This command line commands will work in CP method. List your Networks root@node-175:~# neutron net-list +————————————–+———–+——————————————————-+ | id                                   | name      | subnets                                               | +————————————–+———–+——————————————————-+ | de53e7b0-a7de-44b2-8008-39734bb1d634 | net04     | f079aa91-d1fc-47e5-a734-542eef84a7b1 192.168.111.0/24 | |…