Virtualization platform cloudstack (1) -- Introduction

What is cloudstack

Cloudstack is an open-source cloud computing platform with high availability and scalability. Currently, cloudstack supports most mainstream hypervisors, such as KVM, xenserver, VMWare, Oracle Vm, and xen. Cloudstack is an open-source cloud computing solution. It can accelerate the deployment, management, and configuration of highly scalable Public and Private clouds (IAAS. With cloudstack as the basis, data center operators can quickly and conveniently create cloud services through existing infrastructure.

Cloudstack conceptual architecture

User: access my virtual machines, buckets, and manage my personal templates through the network.

Administrator: deploy configuration, manage accounts, monitor resources, arrange jobs, and troubleshoot

Developers: Develop billing, monitoring, statistical reports, and other functional modules to customize graphical interfaces and workflows.

Cloudstack deployment architecture

ZONE: Zone corresponds to a data center in reality. It is the largest unit in cloudstack.

Pod: the pod corresponds to a rack. Machines in the same pod are in the same subnet (network segment.

Cluster: a cluster composed of multiple hosts. Hosts in the same cluster have the same hardware, hypervisor, and shared storage. Virtual machines in the same cluster can be migrated from one host to another without interrupting services.

HOST: the host that runs the VM.

That is, in terms of the Inclusion relationship, a zone contains multiple pods, a pod contains multiple clusters, and a cluster contains multiple hosts.

Primary storage: The primary storage is associated with the cluster. It provides disk volumes for all virtual machines in the cluster. A cluster must have at least one level of storage and be deployed near the host to provide high performance.

Secondary storage: the second-level storage is associated with the zone. It stores template files, ISO images, and disk volume snapshots.

• Template: the operating system image of the virtual machine that can be started, including other configurations such as installed applications.
• ISO image: A disk image that contains operating system data or boot media.
• Disk volume snapshot: The saved copy of the VM data, which can be used to recover data or create a new template.

Cloudstack Software Architecture

Is the software architecture of cloudstack:

Architecture deployed with cloudstack and KVM

Is the architecture deployed together cloudstack and KVM:

The agent program must be deployed on each KVM host.

Architecture deployed with cloudstack and vsphere

Is the architecture where cloudstack and vsphere are deployed together:

If you deploy VMware products, you must deploy vcenter server.

Storage types supported by cloudstack

Is the storage type supported by cloudstack:

Cloudstack APIs

• Web Services
• Rest Architecture
• Support Post/get requests
• Return XML or JSON response format
• Root administrator, domain administrator, and user

Comparison between cloudstack and openstack

Next we will look at the comparison of the two cloud platforms:

Comparison item	Cloudstack	Openstack
Service Level	IAAs	IAAs
Authorization Protocol	In Apache 2.0	In Apache 2.0
In Apache 2.0	No	No
Dynamic Resource Allocation	Automatic VM migration in maintainance Mode	No ready-to-use functions, which must be implemented by the Nova-Scheduler Component
VM Template	Supported	Supported
VM Console	Supported	Supported
Development language	Java	Python
User Interface	Web console with complete functions	Dashboard, relatively simple
Server Load balancer	Virtual router and Hardware load balancing	Software Load Balancing (NOVA-network or Openstack load balance API) and Hardware load balancing
Virtualization Technology	Xenserver, Oracle Vm, vcenter, KVM, bare metal	Xenserver, Oracle VM, KVM, qemu, ESX/esxi, lxc (liunx container), etc.
Minimal deployment	One Management node and one host Node	All in one (required for the Nova, Keystone, and glance components)
Supported Databases	MySQL	PostgreSQL, MySQL, SQLite
Components	Console proxy Vm, second storage Vm, virtual router Vm, Host agent, Management Server	Nova, glance, Keystone, Horizon, swift
Network format	Isolation (VLAN), share	VLAN, flat, flatdhcp
Version Problems	Stable version release, no compatibility issues	Compatibility issues of different versions
VLAN	Mutual access between VLANs is not allowed	Support interconnection between VLANs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Of course, things are evolving, and open-source developers make contributions every day. Therefore, functions that are not available or unsupported are likely to be supported in the next version.