feat(controller): watch run.yaml configmap for updates (#68)

Updates the operator's controller to watch for the changes to the
ConfigMap specified in the LlamaStackDistribution CR.

Closes: #12

---------

Signed-off-by: Doug Edgar <dedgar@redhat.com>

Author: rhdedgar

README.md

@@ -70,6 +70,16 @@ spec:
 ```
 3. Verify the server pod is running in the user defined namespace.
 
+### Using a ConfigMap for run.yaml configuration
+
+A ConfigMap can be used to store run.yaml configuration for each LlamaStackDistribution.
+Updates to the ConfigMap will restart the Pod to load the new data.
+
+Example to create a run.yaml ConfigMap, and a LlamaStackDistribution that references it:
+```
+kubectl apply -f config/samples/example-with-configmap.yaml
+```
+
 ## Developer Guide
 
 ### Prerequisites

api/v1alpha1/llamastackdistribution_types.go

@@ -1999,6 +1999,21 @@ spec:
                         pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
                         x-kubernetes-int-or-string: true
                     type: object
+                  userConfig:
+                    description: UserConfig defines the user configuration for the
+                      llama-stack server
+                    properties:
+                      configMapName:
+                        description: ConfigMapName is the name of the ConfigMap containing
+                          user configuration
+                        type: string
+                      configMapNamespace:
+                        description: ConfigMapNamespace is the namespace of the ConfigMap
+                          (defaults to the same namespace as the CR)
+                        type: string
+                    required:
+                    - configMapName
+                    type: object
                 required:
                 - distribution
                 type: object
@@ -2150,6 +2165,9 @@ spec:
         required:
         - spec
         type: object
+    selectableFields:
+    - jsonPath: .spec.server.userConfig.configMapName
+    - jsonPath: .spec.server.userConfig.configMapNamespace
     served: true
     storage: true
     subresources:

api/v1alpha1/zz_generated.deepcopy.go

@@ -8,14 +8,25 @@ rules:
   - ""
   resources:
   - configmaps
+  verbs:
+  - '*'
+- apiGroups:
+  - ""
+  resources:
   - deployments
-  - persistentvolumeclaims
   - persistentvolumes
   - pods
   - pods/exec
   - pods/log
   verbs:
   - '*'
+- apiGroups:
+  - ""
+  resources:
+  - persistentvolumeclaims
+  - services
+  verbs:
+  - '*'
 - apiGroups:
   - ""
   resources:
@@ -30,15 +41,14 @@ rules:
   - update
   - watch
 - apiGroups:
-  - ""
+  - apps
   resources:
-  - services
+  - deployments
   verbs:
   - '*'
 - apiGroups:
   - apps
   resources:
-  - deployments
   - deployments/finalizers
   verbs:
   - '*'

config/crd/bases/llamastack.io_llamastackdistributions.yaml

@@ -0,0 +1,43 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: llama-stack-config
+data:
+  run.yaml: |
+    # Llama Stack Configuration
+    version: '2'
+    image_name: ollama
+    apis:
+    - inference
+    providers:
+      inference:
+      - provider_id: ollama
+        provider_type: "remote::ollama"
+        config:
+          url: "http://ollama-server-service.ollama-dist.svc.cluster.local:11434"
+    models:
+      - model_id: "llama3.2:1b"
+        provider_id: ollama
+        model_type: llm
+    server:
+      port: 8321
+---
+apiVersion: llamastack.io/v1alpha1
+kind: LlamaStackDistribution
+metadata:
+  name: llamastack-with-config
+spec:
+  replicas: 1
+  server:
+    distribution:
+      name: ollama
+    containerSpec:
+      port: 8321
+      env:
+      - name: INFERENCE_MODEL
+        value: "llama3.2:1b"
+      - name: OLLAMA_URL
+        value: "http://ollama-server-service.ollama-dist.svc.cluster.local:11434"
+    userConfig:
+      configMapName: llama-stack-config
+      # configMapNamespace: ""  # Optional - defaults to the same namespace as the CR