Files
slp-modular-cms/aidlc-docs/features/local-dev-master-slave-setup/construction/build-and-test/build-instructions.md
T
SluijsensandClaude Sonnet 5 0447993181 Completes local-dev-master-slave-setup: dual-instance frontend tooling, module-capability gating, and master/slave protocol self-healing fixes
Frontend (Unit 2 completion): dual dev-server tooling (pnpm dev:slave,
pnpm dev:all), per-instance browser tab titles, and a backend
capability check (SystemController + useSystemCapabilities +
ModuleGuard) so a Master-only page is hidden on a slave instance
instead of assuming every backend has every module.

Master/slave protocol fixes surfaced by actually running master and
slave side by side locally:
- Deactivating a CMS instance (Inactive) now releases the slave's
  master gate instead of leaving it stuck on its last pushed status.
- The periodic integrity check now also re-pushes status to every
  reachable slave (previously URL-verification only) and runs once
  immediately on startup.
- Added the originally-specified (but never implemented) slave-pull
  path: a slave now periodically polls its own status from the master
  (GET /api/v1/SlaveStatus) and fails open to Available if the master
  is unreachable for too long, complementing the existing push.
- The slave's own Settings page can no longer "successfully" change
  local availability while the master controls it; it's now locked
  with an explanatory banner and the backend rejects the write with
  409 instead of silently no-op'ing it.
- CMS instance status badges now match the dashboard's color/icon
  styling instead of a plain grey badge.

Also corrected the master-cms-module design docs to match this
as-built behavior, and flagged (without a full rewrite) a larger,
pre-existing divergence between its inception-stage application
design and what construction actually built.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-04 19:53:52 +02:00

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# Build Instructions — Local Dev Master/Slave Setup
## Prerequisites
- **Build Tool**: .NET 10 SDK
- **Dependencies**: NuGet packages restore automatically on build (no new external dependencies introduced by this feature)
- **Environment Variables**: None required to build (runtime config is via `appsettings.local.json`, see below)
- **System Requirements**: Same as the rest of the repository — no new system requirements
## Build Steps
### 1. Restore & Build
```powershell
dotnet build SlpModularCms.sln
```
### 2. Verify Build Success
- **Expected Output**: `Build succeeded.` with 0 errors (NuGet advisory warnings for `Microsoft.OpenApi` and a few `NU1510`/prune warnings are pre-existing and unrelated to this feature).
- **Build Artifacts**: `src/SlpModularCms.Api/bin/`, `src/SlpModularCms.Api.Slave/bin/` (new), plus all existing project outputs.
- **Common Warnings**: NU1903 (Microsoft.OpenApi advisory) and NU1510 (package pruning) appear across multiple projects — pre-existing, not introduced by this feature.
### Actual Result (this session)
Ran `dotnet build SlpModularCms.sln`**Build succeeded**, 0 errors.
## Troubleshooting
### Build Fails with `CS0246` in `SlpModularCms.Core/Hosting/*.cs`
- **Cause**: `SlpModularCms.Core` is a plain `Microsoft.NET.Sdk` project (not `Sdk.Web`), so ASP.NET Core implicit usings (`Microsoft.Extensions.DependencyInjection`, `Microsoft.Extensions.Configuration`, `Microsoft.AspNetCore.Builder`, `Microsoft.AspNetCore.Http`) aren't automatically available like they are in `SlpModularCms.Api`.
- **Solution**: Already fixed during Code Generation — explicit `using` statements were added to `ServiceCollectionExtensions.cs`. If this recurs after further edits, add the missing explicit `using`.
### `SlpModularCms.Api.Slave` fails to start with a SQL connection error
- **Cause**: Missing `src/SlpModularCms.Api.Slave/appsettings.local.json` (gitignored, must be created locally per developer).
- **Solution**: Copy `appsettings.local.json.example` to `appsettings.local.json` and fill in your local SQL Server credentials, using a **different** `Database=` name than the master instance (e.g. `SlpModularCmsSlave`).