Modernize demo sample to Radius.* resource types and add Redis/PostgreSQL variants with secret binding

samples/demo/app-postgresql.bicep

@@ -0,0 +1,92 @@
+extension radius
+
+@description('The Radius Environment ID. Injected automatically by the rad CLI.')
+param environment string
+
+@description('Container image for the demo app. Defaults to the published sample image; overridden in CI to test a locally-built image.')
+param image string = 'ghcr.io/radius-project/samples/demo:latest'
+
+@description('The administrator password for the PostgreSQL database. Pass via the CLI, e.g. -p password=$(openssl rand -hex 16).')
+@secure()
+param password string
+
+// Environment name derived from the Environment ID, used to keep resource names
+// unique per environment (e.g. dev/test/prod) within the same resource group.
+var environmentName = last(split(environment, '/'))
+
+resource demoApp 'Radius.Core/applications@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
+  properties: {
+    environment: environment
+  }
+}
+
+// The demo container needs the same password used to provision the database.
+// Store it in a Radius.Security/secrets resource and bind it by reference rather
+// than passing it to the container as a plain `env` value: `data.value` is
+// x-radius-sensitive, so Radius encrypts it at rest and redacts it on reads,
+// whereas a container `env.value` is stored unencrypted on the container
+// resource and rendered literally into the pod spec.
+resource dbCredentials 'Radius.Security/secrets@2025-08-01-preview' = {
+  name: 'postgresql-credentials-${environmentName}'
+  properties: {
+    environment: environment
+    application: demoApp.id
+    data: {
+      password: {
+        value: password
+      }
+    }
+  }
+}
+
+resource postgresql 'Radius.Data/postgreSqlDatabases@2025-08-01-preview' = {
+  name: 'postgresql-${environmentName}'
+  properties: {
+    environment: environment
+    application: demoApp.id
+    size: 'S'
+    database: 'appdb'
+    username: 'myadmin'
+    password: password
+  }
+}
+
+resource demoContainer 'Radius.Compute/containers@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
+  properties: {
+    environment: environment
+    application: demoApp.id
+    containers: {
+      web: {
+        image: image
+        // Host, port, username, and database arrive automatically as
+        // CONNECTION_POSTGRESQL_* env vars from the connection below. The
+        // connection cannot carry the password (x-radius-sensitive properties
+        // redact to null on reads and are skipped by the containers recipe), so
+        // it is bound by reference here under the same naming scheme, filling
+        // the one gap the connection leaves.
+        env: {
+          CONNECTION_POSTGRESQL_PASSWORD: {
+            valueFrom: {
+              secretKeyRef: {
+                secretName: dbCredentials.name
+                key: 'password'
+              }
+            }
+          }
+        }
+        ports: {
+          web: {
+            containerPort: 3000
+          }
+        }
+      }
+    }
+    connections: {
+      postgresql: {
+        source: postgresql.id
+      }
+    }
+  }
+}

samples/demo/app-redis.bicep

@@ -0,0 +1,63 @@
+extension radius
+
+@description('The Radius Environment ID. Injected automatically by the rad CLI.')
+param environment string
+
+@description('Container image for the demo app. Defaults to the published sample image; overridden in CI to test a locally-built image.')
+param image string = 'ghcr.io/radius-project/samples/demo:latest'
+
+// Environment name derived from the Environment ID, used to keep resource names
+// unique per environment (e.g. dev/test/prod) within the same resource group.
+var environmentName = last(split(environment, '/'))
+
+resource demoApp 'Radius.Core/applications@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
+  properties: {
+    environment: environment
+  }
+}
+
+resource redis 'Radius.Data/redisCaches@2025-08-01-preview' = {
+  name: 'redis-${environmentName}'
+  properties: {
+    environment: environment
+    application: demoApp.id
+    size: 'S'
+  }
+}
+
+resource demoContainer 'Radius.Compute/containers@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
+  properties: {
+    environment: environment
+    application: demoApp.id
+    containers: {
+      web: {
+        image: image
+        // The recipe's `url` secret is NOT injected through the connection. It is
+        // materialized into a managed Radius.Security/secrets resource, so bind it
+        // by reference with secretKeyRef -- the value never lands in the pod spec.
+        env: {
+          REDIS_URL: {
+            valueFrom: {
+              secretKeyRef: {
+                secretName: redis.properties.secrets.name
+                key: 'url'
+              }
+            }
+          }
+        }
+        ports: {
+          web: {
+            containerPort: 3000
+          }
+        }
+      }
+    }
+    connections: {
+      redis: {
+        source: redis.id
+      }
+    }
+  }
+}

samples/demo/app.bicep

@@ -1,40 +1,36 @@
 extension radius
 
-param application string
+@description('The Radius Environment ID. Injected automatically by the rad CLI.')
 param environment string
 
+@description('Container image for the demo app. Defaults to the published sample image; overridden in CI to test a locally-built image.')
 param image string = 'ghcr.io/radius-project/samples/demo:latest'
 
-resource demo 'Applications.Core/containers@2023-10-01-preview' = {
-  name: 'demo'
+// Environment name derived from the Environment ID, used to keep resource names
+// unique per environment (e.g. dev/test/prod) within the same resource group.
+var environmentName = last(split(environment, '/'))
+
+resource demoApp 'Radius.Core/applications@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
   properties: {
-    application: application
-    container: {
-      image: image
-      ports: {
-        web: {
-          containerPort: 3000
-        }
-      }
-      livenessProbe: {
-        kind: 'httpGet'
-        containerPort: 3000
-        path: '/healthz'
-        initialDelaySeconds: 10
-      }
-    }
-    connections: {
-      redis: {
-        source: db.id
-      }
-    }
+    environment: environment
   }
 }
 
-resource db 'Applications.Datastores/redisCaches@2023-10-01-preview' = {
-  name: 'db'
+resource demoContainer 'Radius.Compute/containers@2025-08-01-preview' = {
+  name: 'demo-${environmentName}'
   properties: {
-    application: application
     environment: environment
+    application: demoApp.id
+    containers: {
+      web: {
+        image: image
+        ports: {
+          web: {
+            containerPort: 3000
+          }
+        }
+      }
+    }
   }
 }