Docker: Use runtime-deps base image#1782
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Pull request overview
This PR optimizes the Docker image size by switching the base image from aspnet:10.0-alpine to runtime-deps:10.0-alpine. Following PR #1760 which enabled self-contained trimmed binaries for Docker, this change removes the unnecessary ASP.NET runtime from the base image since all required dependencies are now included in the self-contained binary itself.
Changes:
- Switch Docker base image from
aspnet:10.0-alpinetoruntime-deps:10.0-alpine, achieving an additional ~20-25% image size reduction - Update Azure MCP Server CHANGELOG.md to document the image size improvements from the trimmed binary change
- Add changelog entry describing the Docker base image optimization
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| Dockerfile | Changed base image from aspnet to runtime-deps, appropriate for self-contained binaries |
| servers/Azure.Mcp.Server/CHANGELOG.md | Updated description for PR #1760 to include image size metrics (incorrect section - should be in Unreleased) |
| servers/Azure.Mcp.Server/changelog-entries/1771625444448.yaml | Added changelog entry for the Docker base image change |
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vukelich
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Feb 20, 2026
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What does this PR do?
In this merged pr, we enabled self-contained trimmed server binary for the Docker image. The beta.21 release shows the following size savings:
This is a follow-up PR that changes the Docker base image from
aspnet:10.0-alpinetoruntime-deps:10.0-alpine. Since a self-contained trimmed binary doesn't require the fullASP.NETruntime, this change reduces the image size by an additional ~20-25%aspnetbase)runtime-depsbase, projected for upcoming release)Combining these two PRs, the overall size savings is in the range of 50-60%.
aspnetbase)runtime-depsbase, projected for upcoming release)[Any additional context, screenshots, or information that helps reviewers]GitHub issue number?
[Link to the GitHub issue this PR addresses]Pre-merge Checklist
servers/Azure.Mcp.Server/CHANGELOG.mdand/orservers/Fabric.Mcp.Server/CHANGELOG.mdfor product changes (features, bug fixes, UI/UX, updated dependencies)servers/Azure.Mcp.Server/README.mdand/orservers/Fabric.Mcp.Server/README.mddocumentationeng/scripts/Process-PackageReadMe.ps1. See Package README/servers/Azure.Mcp.Server/docs/azmcp-commands.mdand/or/docs/fabric-commands.md.\eng\scripts\Update-AzCommandsMetadata.ps1to update tool metadata in azmcp-commands.md (required for CI)ToolDescriptionEvaluatorand obtained a score of0.4or more and a top 3 ranking for all related test promptsconsolidated-tools.json/servers/Azure.Mcp.Server/docs/e2eTestPrompts.mdcrypto mining, spam, data exfiltration, etc.)/azp run mcp - pullrequest - liveto run Live Test Pipeline