Apache CloudStack vs Juju

Apache CloudStack is free, open-source software for deploying and managing networks of virtual machines as a highly available, scalable IaaS cloud platform. Organizations can use it to build public, private, or hybrid clouds. Its features include compute orchestration, network services, account management, resource accounting, a web interface, and an open API. Operators can manage clouds through a web UI, command-line tools, or REST API, with optional AWS EC2- and S3-compatible APIs. Supported hypervisors include XenServer or XCP, KVM, Hyper-V, and VMware ESXi with vSphere. Storage options include iSCSI, NFS, Ceph RBD with KVM, volume encryption, snapshots, and storage tiering. Authentication options include OAuth2 single sign-on, two-factor authentication, TOTP, SAML, and LDAP. The project says CloudStack can manage tens of thousands of physical servers across geographically distributed data centers. Long Term Support releases receive bug and security fixes for 18 months after the main release. Operators remain responsible for protections such as monitoring, host security, and defenses against DoS and brute-force attacks.

Juju is Canonical’s open source orchestration engine for deploying, connecting and managing application lifecycles with charms. A charm packages reusable business logic to automate parts of an application’s life. Juju treats application integrations as part of lifecycle management and can manage software across public clouds, Kubernetes, virtual machines and bare metal. It can apply networking and configuration changes between applications even when they run on different clouds. Charmhub is a curated marketplace with charms for tools such as PostgreSQL, MySQL, MongoDB, Kafka, Kubeflow, Apache Spark, Prometheus, Grafana, Loki, Vault, Traefik and Landscape. For enterprise use, JAAS provides a central control plane that can manage hundreds of Juju controllers. It adds fine-grained access controls, auditing and support for external identity providers through OIDC and single sign-on in the CLI and web dashboard. JAAS also has a graphical administration and monitoring dashboard. Juju is free and open source; listed platforms include Linux, macOS, Windows, API and self-hosted environments.