The second NIC is used for private, storage, and public networking via VLANs. My OpenStack cluster has an administration network that is also used for PXE on the onboard NIC. Once everything was set up and the wiring was complete, I started the installation of Mirantis OpenStack 9.1 from a USB stick on my designated Fuel master node.
The adapter supports 802.1Q, checksum offloading, has drivers for Linux kernel 4.x/3.x/2.6.x, and it’s received positive reviews for running on Linux. Since my cluster nodes only have one NIC and I wanted to have a multi-NIC setup, I considered my options and settled on a USB 3.0 to Gigabit Ethernet adapter as a second NIC.
In any event, my goal was to set up a portable OpenStack cluster for demo purposes, not for production use cases. True, this is not the usual enterprise hardware you would want for a production cluster, but I tend to take things literally, so I set up OpenStack on commodity hardware. I set up my OpenStack cluster on 6 Dell OptiPlex 7040 machines, 1 router, 1 managed switch, and 1 unmanaged switch. It was the perfect opportunity to learn more about OpenStack, perform a head-long deep dive into Neutron, and update my network troubleshooting skills. Once upon a time, I set up an OpenStack cluster and experienced some strange connectivity problems with all my OpenStack instances.
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