Canonical Landscape vs Rex

Canonical Landscape manages Ubuntu desktops, servers, cloud instances, IoT devices, and other Ubuntu systems from a central portal. Administrators can handle updates, packages and repositories, run scripts remotely, set role-based access, and monitor machines. It can alert on updates and graph temperature, disk and memory use, system load, and custom metrics. One instance can manage up to 40,000 machines, with options to scale further. Deployment choices are Canonical-hosted SaaS, Managed Landscape, and self-hosted software; SaaS is bundled with Ubuntu Pro. A free SaaS account with Ubuntu Pro covers up to five machines. Managed Landscape costs $6,861 a year per physical machine on public clouds, VMware, OpenStack, or LXD, or $9,470 a year per physical machine on bare metal. No self-hosted price is listed; Ubuntu Pro is its main licensing mechanism. Landscape has a scriptable API and can integrate with configuration management, monitoring, and ticketing systems. Self-hosting requires the organization to install, host, and maintain it. SaaS does not currently offer repository mirroring or custom external identity-provider configuration.

Rex is a free, open-source automation framework for managing local computers and remote machines over SSH. It runs self-hosted and agentless on Linux and Windows, with support also listed for RHEL/CentOS, Fedora, OpenWRT, BSDs, and Solaris. Projects keep inventory, environments, authentication details, and tasks in a Rexfile. You can combine local or remote execution, push or pull management, and imperative or declarative styles. Tasks can install packages, upload configuration files, start services, and trigger actions when files change. Rex uses a DSL compatible with Perl syntax and can be extended with Perl modules or custom code. Authentication documentation covers passwords, SSH keys, passphrases, external credential sources, and ssh-agent. The control host needs Perl and dependencies; managed hosts need Perl 5 and a valid SSH account. Installation is recommended through CPAN, with package-manager and source options. Apache 2.0 licensing applies to Rex and its parts.