chore(ci): reach the database over the tailnet when CI_DB_TAILNET is set (#9541)

Author: waleedlatif1

.github/workflows/ci.yml

@@ -114,6 +114,7 @@ jobs:
   migrate:
     permissions:
       contents: read
+      id-token: write
     name: migrate
     needs: [checks]
     # Explicit need results instead of the implicit success(): a skipped job
@@ -133,6 +134,8 @@ jobs:
       STAGING_DATABASE_URL: ${{ secrets.STAGING_DATABASE_URL }}
       MIGRATION_DATABASE_URL: ${{ secrets.MIGRATION_DATABASE_URL }}
       STAGING_MIGRATION_DATABASE_URL: ${{ secrets.STAGING_MIGRATION_DATABASE_URL }}
+      TS_OAUTH_CLIENT_ID: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+      TS_AUDIENCE: ${{ secrets.TS_AUDIENCE }}
 
   # Same ordering for dev (schema push before the dev image lands in ECR)
   migrate-dev:
@@ -146,6 +149,8 @@ jobs:
       environment: dev
     secrets:
       DEV_DATABASE_URL: ${{ secrets.DEV_DATABASE_URL }}
+      TS_OAUTH_CLIENT_ID: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+      TS_AUDIENCE: ${{ secrets.TS_AUDIENCE }}
 
   # Dev: build immutable images alongside the schema push and Trigger upload.
   image-dev:
@@ -1166,6 +1171,9 @@ jobs:
 
   # Process docs embeddings (only when docs change, after images are promoted)
   docs:
+    permissions:
+      contents: read
+      id-token: write
     name: docs
     needs: [promote, docs-changes]
     # Explicit results: see migrate's comment.
@@ -1178,6 +1186,8 @@ jobs:
     secrets:
       DATABASE_URL: ${{ secrets.DATABASE_URL }}
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      TS_OAUTH_CLIENT_ID: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+      TS_AUDIENCE: ${{ secrets.TS_AUDIENCE }}
 
   # Create GitHub Release (only for version commits on main, after all builds complete)
   release:

.github/workflows/docs.yml

@@ -7,6 +7,10 @@ on:
         required: false
       OPENAI_API_KEY:
         required: false
+      TS_OAUTH_CLIENT_ID:
+        required: false
+      TS_AUDIENCE:
+        required: false
   workflow_dispatch:
     inputs:
       publish:
@@ -40,6 +44,10 @@ jobs:
     concurrency:
       group: docs-search-index-production
       cancel-in-progress: false
+    permissions:
+      contents: read
+      # Tailscale workload identity federation exchanges this job's OIDC token.
+      id-token: write
 
     steps:
       - name: Record verified deployment and backup
@@ -68,6 +76,16 @@ jobs:
           provider: ${{ vars.CI_PROVIDER }}
           node-version: '24'
 
+      # Database IP restrictions admit the tailnet's app connector; see migrate.yml.
+      - name: Join the tailnet
+        if: vars.CI_DB_TAILNET == 'true'
+        uses: tailscale/github-action@d1b6cd204f8dceda5b3eaad7f1f767be390056cd # v4.2.0
+        with:
+          oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+          audience: ${{ secrets.TS_AUDIENCE }}
+          tags: tag:ci
+          args: --accept-routes
+
       - name: Process docs embeddings
         working-directory: ./apps/docs
         env:

.github/workflows/migrate.yml

@@ -18,6 +18,10 @@ on:
         required: false
       STAGING_MIGRATION_DATABASE_URL:
         required: false
+      TS_OAUTH_CLIENT_ID:
+        required: false
+      TS_AUDIENCE:
+        required: false
   workflow_dispatch:
     inputs:
       environment:
@@ -46,6 +50,10 @@ jobs:
     concurrency:
       group: migrate-${{ inputs.environment }}
       cancel-in-progress: false
+    permissions:
+      contents: read
+      # Tailscale workload identity federation exchanges this job's OIDC token.
+      id-token: write
 
     steps:
       # An environment only migrates from its own branch, so a manual dispatch
@@ -73,6 +81,18 @@ jobs:
             exit 1
           fi
 
+      # Database IP restrictions admit the tailnet's app connector, never a
+      # runner's address. Linux nodes only use app connector routes with
+      # --accept-routes.
+      - name: Join the tailnet
+        if: vars.CI_DB_TAILNET == 'true'
+        uses: tailscale/github-action@d1b6cd204f8dceda5b3eaad7f1f767be390056cd # v4.2.0
+        with:
+          oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+          audience: ${{ secrets.TS_AUDIENCE }}
+          tags: tag:ci
+          args: --accept-routes
+
       - name: Checkout code
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with: