Azure Linux 4.0 is a Fedora-based, general-purpose server distribution for Azure virtual machines, expanding supported Linux offerings beyond container hosting. Azure Container Linux is an immutable, container-optimized host built on the acquired Flatcar project and is generally available. The hardened approach targets security, predictability, and easier development of cloud-native applications and AI agents. Azure already runs Linux on more than two-thirds of customer cores, and large-scale AI workloads run on Linux compute. The product split matches workload needs: Azure Linux 4.0 supports familiar RPM-based package ecosystems for VM workloads, while Azure Container Linux uses an immutable model with no package manager and runs customer workloads in containers on a fixed base.
"Open source is the foundation for AI and, as AI workloads scale, developers need that foundation to be more secure, more predictable, and easier to build apps and agents. Azure Linux 4.0 and Azure Container Linux give developers and organizations a hardened Linux distribution purpose-built for cloud native and AI workloads."
"More than two-thirds of customer cores in Azure already run Linux. ChatGPT scales across over 10 million compute cores running Linux. Microsoft's previous Azure Linux (version 3.0, originally CBL-Mariner) was available only through AKS as a container host. The split into two products reflects two distinct workload patterns: Azure Linux 4.0 for general-purpose VM workloads where teams need a familiar RPM-based package ecosystem, and Azure Container Linux for immutable, minimal container hosts in regulated and security-sensitive environments."
"everything is baked in with no package manager, and all customer workloads run in containers on top of the immutable base. If teams need to change system packages, they're on the wrong product."
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