Karmada vs Qstack

Karmada manages cloud-native applications across multiple Kubernetes clusters and clouds without requiring changes to the applications. It supports public and private cloud, on-premises, edge, and self-built environments that meet Kubernetes specifications. Cluster connections can use Push mode through a Kubernetes API server or Pull mode through an in-cluster agent. Scheduling policies cover cluster affinity, taints and tolerations, topology spread, and replicated or divided placement. OverridePolicy allows per-cluster changes to images, arguments, commands, and plain-text configuration. Karmada can move replicas after a cluster failure, including migration that avoids service replicas dropping to zero. Through karmada-apiserver, teams can create, update, delete, and query resources across member clusters. Its components export Prometheus metrics; integrations described include Submariner networking and ErieCanal service governance. Installation options include CLI tools, Helm, an operator, binaries, or source. The CLI initialization requires escalated privileges to store shared configuration under /etc/karmada by default. Karmada is open source and free, with customer-managed control plane; it manages clusters but does not provision them.

Qstack is a multi-cloud management system for managing servers, cloud hosts, proxy IP products, operations, and secure storage. It is aimed at IDC service providers, teams, and businesses that manage product processes. The system can connect to Alibaba Cloud, Tencent Cloud, and Huawei Cloud, synchronize current product information, and support automated payments on connected public cloud platforms. Product management listings also name QStack, 星外, Proxmox, 小鸟云, and 景安云. Team functions include member management, ticketing, workflow approvals, and revenue sharing. Qstack supports private deployment; the maker says the system program is provided free for that use, with non-core code open source and support for secondary development. An open API and plugin and template mechanism are available for connections and customization. API requests can use HTTP or HTTPS, with HTTPS recommended. Deployment guidance describes Linux with an LNMP setup of Nginx, MySQL, and PHP 7.3. The basic edition is free for small IDC teams; the professional edition costs 9,999 CNY a year. The operations edition has no listed price.