Open Source Cloud Platform Cloudstack detailed explanation

Cloudstack was developed by Vmops in 2008, and Vmops renamed Cloudstack.com in May 2010, with the release of version 2.0. Last July, Cloudstack.com acquired the 3.0 edition. This April, Cloudstack contributed to the Apache community with open source. October Cloudstack released the first version of--cloudstack4.0 as a community. The first Cloudstack conference was held in Las Vegas in mid-November.

This is the general history of Cloudstack, Cloudstack is a low-cost resource control of open source cloud platform, often used to fight against the OpenStack, the platform has all the attributes of cloud computing, support multi-tenant, with smooth extensibility ... Cloudstack can abstract physical resources and manage them, provide an integrated management engine, complete the API system, and provide some UI.

In the 2012 Cloud World Congress, the Forum "cloud Open source", from the Apache Open source community Sun Zhennan introduced to US cloudstack related content, he said Cloudstack to the cluster has certain requirements, the cluster must be a consistent physical machine, convenient in the cluster to do some migration, Cluster this level should be a logical structure inside the more important level, the cluster below is the specific host. Each cluster is actually required to share primary storage, provided that the storage is shared. The following is the Cloudstack chart:

Pictures from Baidu Encyclopedia

What is the current expansion of Cloudstack? Sun Zhennan said: "A Management Server node, currently can support to 10,000 or so resources, of course, this resource is not only your physical host, but also includes other primary storage, level two storage, as well as your switch, these are your resources, it can be a Management Server node can support to 10,000, It is enough for everyone to deploy their own private cloud, and some of the public clouds are almost not up to that scale. If the traffic is very large, you can add more than one Management server, the front load balance can be completely done. ”

Apache has a test on cloudstack scalability, with four Management Server load balancing, can support 30,000 physical resources, 30,000 virtual machine size.

Cloudstack has a lot of active or passive way, he introduced: "The active way is, for example, do dynamic migration, the host for artificial maintenance, in predictable time, hard disk damage, my memory needs to increase some, in this case is actually active behavior, Maintain a certain resources of the system. "Passive in this case is unpredictable, most of this is the case, Cloudstack provides HA mechanism, as long as the virtual machine before the start, use this service to check the HA, the host is broken, or the virtual machine server has problems, you can automatically pick it up."

In addition, we learned that Cloudstack supports two resource domains. The first is the basic network, which can be thought of as a basic resource domain in the cloudstack domain. Two different colors refers to two different users or two different accounts under the user virtual machine, their own allocation of IP, through the network of three-tier exchange for interoperability, or set up some rules. Put a firewall in front of it and isolate it through a security group. Another is the advanced resource domain, where for virtual routers, each account has its own virtual router, responsible for many network functions, two-tier isolation, that is, based on VLAN isolation. Two different customers whose virtual machines and IP can be duplicated.

Finally, Sun Zhennan the survey, they found that the current virtualization platform, or the first three of virtualization software is VMware, XenServer and KVM. Referring to the contrast with OpenStack, he says the advantage of Openstack,cloudstack is that it is early in the open source cloud platform and has many commercial success stories. In addition, he wants more people to join the Cloudstack community to promote the development of open source cloud.

(Responsible editor: The good of the Legacy)