Configure environment and secrets for ASP.NET Core

Summary

Configuration and secrets for a ASP.NET Core app on Ample. Verified on ASP.NET Core: an --env value delivered encrypted and reported as present without being echoed (secret=set). Build and start: dotnet publish -c Release -o out in the builder, then dotnet <entry>.dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT.

Infrastructure requirements

• Compute: verified (Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.)

Prerequisites

• A ASP.NET Core project (dotnet publish -c Release -o out in the builder, then dotnet <entry>.dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT)
• An Ample account token with servers:write

Exact tested configuration

• template: dotnet-10
• runtime: dotnet
• size: s-1vcpu-1gb
• build: dotnet publish -c Release -o out
• start: ASPNETCORE_URLS=http://0.0.0.0:$PORT dotnet out/$(basename $(ls out/*.runtimeconfig.json | head -n 1) .runtimeconfig.json).dll

Steps

1. Build and start. dotnet publish -c Release -o out in the builder, then dotnet <entry>.dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT; the server must bind 0.0.0.0 on PORT.
2. Pass values on deploy. Use --env KEY=value (repeatable) or --env-file; values are encrypted at rest and reused on redeploys. Declare names only in ample.toml.

   ample deploy . --name <app-name> --public --env MY_SECRET=...

3. Verify. Fetch the live URL and /p/configuration-secrets on the example; on failure read the build and runtime logs.

   ample logs <deployment_id> --kind build

Tested examples

• ASP.NET Core pattern fixture (tests/deploy-canaries/asp-net-core-patterns): Verified configuration and secrets on ASP.NET Core.

Success checks

• app responds on its public URL (/ on the live URL, expect ample canary asp net core patterns)
• configuration-secrets check from the example (/p/configuration-secrets on the live URL, expect see the pattern fixture checks)

Limitations

• Verified on the dotnet-10 template at s-1vcpu-1gb; other sizes and ASP.NET Core major versions are not verified.
• Region, compliance attestations and request-duration limits are unknown and not claimed.

Cost estimate

Estimated 5.00 USD per month (size prices from pricing.toml at build revision a1b8c38919e59cd035ebabaced73cf84ece24371).

• app server x1 s-1vcpu-1gb: 5.00 USD

Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included.

Verification evidence

• canary_run on 2026-09-21T01:15:54Z at revision 50dbac567d2c5cc8e55e6c748a646be0025d9cfb-dirty (CLI 0.1.21): ASP.NET Core pattern fixture deployed on Ample (dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT); for this guide: an --env value delivered encrypted and reported as present without being echoed (secret=set). (expires 2027-03-20T01:15:54Z)

Last verified: 2026-09-21T01:15:54Z

Execution binding

MCP tool ample_deploy (registry mcp:ample_deploy), schema hash 876465fce906da0c observed 2026-09-21T03:19:59.461917+00:00 at revision 49962bcade4f, binding state current, required scopes: servers:write.