{"id":424,"date":"2026-10-14T07:31:16","date_gmt":"2026-10-14T07:31:16","guid":{"rendered":"http:\/\/www.scmgalaxy.com\/tutorials\/2015\/08\/19\/top-cloud-computing-and-operating-software-2\/"},"modified":"2026-10-14T07:31:16","modified_gmt":"2026-10-14T07:31:16","slug":"top-cloud-computing-and-operating-software-2","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/top-cloud-computing-and-operating-software-2\/","title":{"rendered":"OpenStack vs CloudStack: A Practical Guide to Choosing an Open-Source IaaS Platform"},"content":{"rendered":"\n

Originally published on 2015-08-19; fully revised and updated.<\/em><\/p>\n\n\n\n

\"Top<\/p>\n\n\n\n

If you are evaluating open-source platforms for private cloud infrastructure, OpenStack and Apache CloudStack are two widely referenced options. This article explains what each platform is, how they differ operationally, and how to run a practical, low-risk evaluation before committing to production.<\/p>\n\n\n\n

What these platforms are<\/h2>\n\n\n\n

OpenStack<\/h3>\n\n\n\n

OpenStack<\/a><\/strong> is a free and open-source cloud-computing platform commonly deployed as infrastructure-as-a-service (IaaS). It is built from interrelated services that manage compute, storage, and networking resources across a data center, and it is typically operated through a web dashboard, CLI tools, or REST APIs. The original project is released under the Apache License.<\/p>\n\n\n\n

Apache CloudStack<\/h3>\n\n\n\n

Apache CloudStack<\/a><\/strong> is open-source software for creating, managing, and deploying infrastructure cloud services. The original post highlights use with hypervisors such as KVM, VMware vSphere, and XenServer\/XCP, and notes support for both CloudStack\u2019s own API and AWS\/OCCI-oriented API compatibility.<\/p>\n\n\n\n

OpenStack vs CloudStack at a glance<\/h2>\n\n\n\n
Area<\/th>OpenStack<\/th>Apache CloudStack<\/th>Why it matters<\/th><\/tr><\/thead>
License model<\/td>Open-source (Apache License)<\/td>Open-source (Apache project)<\/td>Both are suitable for self-hosted private cloud models.<\/td><\/tr>
Platform style<\/td>Modular, service-oriented architecture<\/td>Integrated cloud orchestration platform<\/td>Impacts complexity, team design, and operations model.<\/td><\/tr>
Primary interfaces<\/td>Dashboard, CLI, REST APIs<\/td>UI\/CLI\/API operations<\/td>Affects automation approach and day-2 workflows.<\/td><\/tr>
Hypervisor notes<\/td>Ecosystem-driven integrations (verify by release)<\/td>Source calls out KVM, VMware vSphere, XenServer\/XCP<\/td>Hypervisor compatibility can constrain architecture choices.<\/td><\/tr>
API compatibility<\/td>Native APIs<\/td>Native API, plus AWS\/OCCI compatibility noted in source<\/td>Important for migration and tooling reuse.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

A practical evaluation workflow<\/h2>\n\n\n\n

For most DevOps and platform teams, a short pilot with production-like networking and storage is more reliable than checklist-based selection. Use a structured flow so the decision is based on operability, not just feature lists.<\/p>\n\n\n\n

\nflowchart TD\n    A[Define private cloud goals] --> B[Assess team operating model]\n    B --> C{Prefer modular services}\n    C -- Yes --> D[Prototype OpenStack]\n    C -- No --> E[Prototype CloudStack]\n    D --> F[Validate automation upgrades observability]\n    E --> F\n    F --> G[Run pilot workloads]\n    G --> H{SLO and cost targets met}\n    H -- No --> I[Refine design and retest]\n    H -- Yes --> J[Plan phased production rollout]\n<\/pre>\n\n\n\n
Example operational commands<\/h2>\n\n\n\n
The exact commands and output will vary by distribution, version, and authentication setup, but these examples show common operator tasks.<\/p>\n\n\n\n
OpenStack CLI examples<\/h3>\n\n\n
# Check authentication and token issuance<\/span>\nopenstack token issue\n\n# View compute services<\/span>\nopenstack compute service list<\/span>\n\n# List networks<\/span>\nopenstack network list<\/span>\n\n# List instances across projects<\/span>\nopenstack server list<\/span> --all-projects<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
CloudStack CLI examples (CloudMonkey)<\/h3>\n\n\n
# Synchronize API metadata<\/span>\ncloudmonkey sync\n\n# List zones<\/span>\ncloudmonkey list<\/span> zones\n\n# List featured templates<\/span>\ncloudmonkey list<\/span> templates templatefilter=featured\n\n# List VMs across accounts when permitted<\/span>\ncloudmonkey list<\/span> virtualmachines listall=true<\/span><\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Decision criteria to prioritize<\/h2>\n\n\n\n
  • Team skill profile:<\/strong> assess whether your team prefers a modular platform model or a more integrated control plane.<\/li>
  • Automation strategy:<\/strong> verify IaC and API workflows early, not after platform selection.<\/li>
  • Hypervisor and network constraints:<\/strong> align platform choice with your existing virtualization and network architecture.<\/li>
  • Upgrade and lifecycle operations:<\/strong> evaluate patching, rollback, and operational runbooks during pilot.<\/li>
  • Interoperability:<\/strong> test API\/tool compatibility with your current CI\/CD and platform tooling.<\/li><\/ul>\n\n\n\n
    Best practices and common pitfalls<\/h2>\n\n\n\n
    • Run a time-boxed pilot with representative workloads before production commitment.<\/li>
    • Define SLOs and operational success criteria up front (availability, recovery, provisioning time).<\/li>
    • Do not select based only on feature checklists from older articles; verify current capabilities in official docs.<\/li>
    • Validate identity, backup, observability, and disaster recovery integration as early design requirements.<\/li>
    • Document day-2 procedures (capacity, patching, incident response) before scale-out.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"
      This guide compares OpenStack and Apache CloudStack for teams building private IaaS clouds. It covers architecture differences, evaluation workflow, and practical operator commands.<\/p>\n","protected":false},"author":1,"featured_media":3384,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[2],"tags":[531,646,1531,1530,1534,1535,1533,1528,1532,1529,179,637],"class_list":["post-424","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorised","tag-cloud","tag-cloud-computing","tag-cloud-computing-and-operating-software","tag-cloud-computing-and-operating-tools","tag-cloud-computing-software","tag-cloud-computing-tools","tag-cloudstack","tag-computing","tag-openstack","tag-operating","tag-software","tag-top"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/424","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=424"}],"version-history":[{"count":4,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/424\/revisions"}],"predecessor-version":[{"id":79297,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/424\/revisions\/79297"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media\/3384"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}