AzureMonitorAgent: add tested Ubuntu 26.04 support - #2201
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Add Ubuntu 26.04 to the x86_64 and aarch64 support gates and cover production detection, installer admission, and troubleshooter admission. Extend CI through Python 3.14 and avoid mutating the shared distro list while formatting unsupported-version guidance. Based on Azure#2199 by @kamilon, which supplied the allowlist change and end-to-end validation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 0652e405-69e7-4c45-bf9c-e81e5026013b
This was referenced Jul 31, 2026
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Summary
Closes #2200. Related to the observed installation failure in #2173.
Add Ubuntu 26.04 to the Azure Monitor Agent supported-distribution maps for x86_64 and aarch64, with regression coverage for the production installer gate, troubleshooting gate, distro detection, and Python 3.14 runtime.
Attribution
This change is based on and credits #2199 by @kamilon for the original Ubuntu 26.04 allowlist change and public x86_64/aarch64 end-to-end validation.
This alternative adds repository-level coverage so the support declaration is protected by CI. The test changes can also be reviewed or reused independently if the project prefers #2199 as the merge vehicle.
Changes
26.04tosupported_dists_x86_64andsupported_dists_aarch64.is_vm_supported_for_extensiongate accepts Ubuntu 26.04 on both architectures.check_vm_supportedgate accepts Ubuntu 26.04 on both architectures.VERSION_ID="26.04".format_alternate_versionsfrom mutating the shared support list while formatting an unsupported-version message.Why the mutation fix is included
The new support-map assertion exposed that
format_alternate_versionsusedpop()on the shared list. Running an unsupported-version check therefore removed the newest supported version for the remainder of the process. Formatting now uses a slice and leaves the support declaration unchanged.Validation
The complete 127-test AzureMonitorAgent suite passes locally on:
All six GitHub Actions jobs pass in the public fork for Python 3.9 through 3.14.
The existing #2199 provides real-VM ingestion validation for Ubuntu 26.04 on both x86_64 and aarch64; this PR adds the missing repository regression and runtime coverage.