OpenStack Cloud Application Development Quotes

“While not supported currently, it is also possible that other container formats like Rocket could allow you to use Magnum without Docker at all”
― John Belamaric, OpenStack Cloud Application Development

“The first of these technologies, flannel (yes it’s a lowercase f), was created by the people at CoreOS Inc. It is a virtual network that gives a subnet to each host for use with container runtimes”
― John Belamaric, OpenStack Cloud Application Development

“More recent offerings like Mesos and others are not yet supported, but are likely to be implemented at some point in the near future”
― John Belamaric, OpenStack Cloud Application Development

“Unfortunately, as of the Kilo release, Designate does not yet support split-horizon DNS. However, it is on the roadmap so we can look forward to it in a future release”
― John Belamaric, OpenStack Cloud Application Development

“In the database world, outside of clouds, it is necessary to automate tasks such as a daily backup, but it does seem that Trove misses such ability due to heavy decisions on which technology to pick or creating from scratch. Implementing a scheduler is in the roadmap, but it is not clear when it will happen”
― John Belamaric, OpenStack Cloud Application Development

“A VLAN tags Ethernet frames with a 12-bit number, and this enables the physical networking gear to differentiate between the traffic that belongs with individual VLANs”
― John Belamaric, OpenStack Cloud Application Development

“For example, without subnet pools, you would use this API call to create a new subnet:
neutron subnet-create private-network 10.1.0.0 /24”
― John Belamaric, OpenStack Cloud Application Development

“A subnet pool is a collection of IP network prefixes from which a tenant may allocate subnets. That is, in Juno and earlier, the tenant had to specify a specific subnet–like 10.10.10.0 /24–to allocate”
― John Belamaric, OpenStack Cloud Application Development

“In Neutron, when creating a router you can additionally specify that it provide high availability (HA), or that it be a distributed virtual router, which as mentioned above is spread out across all of the compute nodes”
― John Belamaric, OpenStack Cloud Application Development

“Just like Nova Compute, which lets you virtualize machine instances, Neutron Networking lets you virtualize networking components such as routers, firewalls, and load balancers, as shown in Figure 2-10”
― John Belamaric, OpenStack Cloud Application Development

“Nova networking is deprecated in favor of Neutron networking, but some existing clouds still use it, so having some familiarity with it can be useful.”
― John Belamaric, OpenStack Cloud Application Development

“OpenStack includes a dashboard project named Horizon, which is a web interface built with the Django framework and the different OpenStack APIs from the OpenStack services.”
― John Belamaric, OpenStack Cloud Application Development

“An interesting feature introduced with the Kilo release of OpenStack is federated identity. This takes the distributed nature of OpenStack and allows it to span across multiple clouds, even from different providers. Two cloud providers can set up a trust relationship, enabling users of one provider to use the same credentials with another, trusted provider. Thus the same workload management tools you use for a single cloud can theoretically be used to manage workloads across multiple clouds. For capacity burst use cases, this is a powerful feature”
― John Belamaric, OpenStack Cloud Application Development