Microsoft · GitHub · Kubernetes · boxofcables.dev
Back in February 2022 I went looking through Microsoft's package mirrors and found CBL-Delridge
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By November 2022, Delridge was 404: its apt repository went dark and Cloud Shell moved to Microsoft's other Linux: CBL-Mariner.
Key facts
- Azure Linux 4.0 is derived from Fedora, right now a Fedora 43 snapshot, rather than assembled package by package the way 1.0 through 3.0
- By November 2022, Delridge was 404: its apt repository went dark and Cloud Shell moved to Microsoft's other Linux: CBL-Mariner
- So when the reporter say Azure Linux, the reporter mean the distribution that started internal development in September 2019, went public on GitHub in November 2020, hit 2.0 in April 2022, and has been the container host
- Microsoft shipped Azure Linux 4.0 into public preview at Build 2026, and for the first time you can run it on any Azure virtual machine, not as the host underneath Azure Kubernetes Service
Summary
Microsoft shipped Azure Linux 4.0 into public preview at Build 2026, and for the first time you can run it on any Azure virtual machine, not as the host underneath Azure Kubernetes Service. The reporter has been following this distribution since before it had a marketing name. Microsoft has built more than one Linux distribution. CBL stands for Common Base Linux, a whole family of internal distros named after Seattle geography. In March 2024 Microsoft renamed it Azure Linux and renamed the GitHub repository to match. So when the reporter say Azure Linux, the reporter mean the distribution that started internal development in September 2019, went public on GitHub in November 2020, hit 2.0 in April 2022, and has been the container host for AKS since 2023.