refactor: remove Conda support from Llama Stack (#2969)

# What does this PR do?
<!-- Provide a short summary of what this PR does and why. Link to
relevant issues if applicable. -->
This PR is responsible for removal of Conda support in Llama Stack

<!-- If resolving an issue, uncomment and update the line below -->
<!-- Closes #[issue-number] -->
Closes #2539

## Test Plan
<!-- Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.* -->

llama_stack/templates/ci-tests/build.yaml

@@ -47,8 +47,7 @@ distribution_spec:
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
     - provider_type: remote::model-context-protocol
-image_type: conda
-image_name: ci-tests
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - asyncpg

llama_stack/templates/dell/build.yaml

@@ -29,8 +29,7 @@ distribution_spec:
     - provider_type: remote::brave-search
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
-image_type: conda
-image_name: dell
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - sqlalchemy[asyncio]

llama_stack/templates/meta-reference-gpu/build.yaml

@@ -28,8 +28,7 @@ distribution_spec:
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
     - provider_type: remote::model-context-protocol
-image_type: conda
-image_name: meta-reference-gpu
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - sqlalchemy[asyncio]

llama_stack/templates/meta-reference-gpu/doc_template.md

@@ -58,7 +58,7 @@ $ llama model list --downloaded
 
 ## Running the Distribution
 
-You can do this via Conda (build code) or Docker which has a pre-built image.
+You can do this via venv or Docker which has a pre-built image.
 
 ### Via Docker
 
@@ -92,12 +92,12 @@ docker run \
   --env SAFETY_MODEL=meta-llama/Llama-Guard-3-1B
 ```
 
-### Via Conda
+### Via venv
 
 Make sure you have done `uv pip install llama-stack` and have the Llama Stack CLI available.
 
 ```bash
-llama stack build --template {{ name }} --image-type conda
+llama stack build --template {{ name }} --image-type venv
 llama stack run distributions/{{ name }}/run.yaml \
   --port 8321 \
   --env INFERENCE_MODEL=meta-llama/Llama-3.2-3B-Instruct

llama_stack/templates/nvidia/build.yaml

@@ -23,8 +23,7 @@ distribution_spec:
     - provider_type: inline::basic
     tool_runtime:
     - provider_type: inline::rag-runtime
-image_type: conda
-image_name: nvidia
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - sqlalchemy[asyncio]

llama_stack/templates/nvidia/doc_template.md

@@ -105,7 +105,7 @@ curl -X DELETE "$NEMO_URL/v1/deployment/model-deployments/meta/llama-3.1-8b-inst
 
 ## Running Llama Stack with NVIDIA
 
-You can do this via Conda or venv (build code), or Docker which has a pre-built image.
+You can do this via venv (build code), or Docker which has a pre-built image.
 
 ### Via Docker
 
@@ -124,17 +124,6 @@ docker run \
   --env NVIDIA_API_KEY=$NVIDIA_API_KEY
 ```
 
-### Via Conda
-
-```bash
-INFERENCE_MODEL=meta-llama/Llama-3.1-8b-Instruct
-llama stack build --template nvidia --image-type conda
-llama stack run ./run.yaml \
-  --port 8321 \
-  --env NVIDIA_API_KEY=$NVIDIA_API_KEY \
-  --env INFERENCE_MODEL=$INFERENCE_MODEL
-```
-
 ### Via venv
 
 If you've set up your local development environment, you can also build the image using your local virtual environment.

llama_stack/templates/open-benchmark/build.yaml

@@ -32,8 +32,7 @@ distribution_spec:
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
     - provider_type: remote::model-context-protocol
-image_type: conda
-image_name: open-benchmark
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - sqlalchemy[asyncio]

llama_stack/templates/postgres-demo/build.yaml

@@ -18,8 +18,7 @@ distribution_spec:
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
     - provider_type: remote::model-context-protocol
-image_type: conda
-image_name: postgres-demo
+image_type: venv
 additional_pip_packages:
 - asyncpg
 - psycopg2-binary

llama_stack/templates/starter/build.yaml

@@ -47,8 +47,7 @@ distribution_spec:
     - provider_type: remote::tavily-search
     - provider_type: inline::rag-runtime
     - provider_type: remote::model-context-protocol
-image_type: conda
-image_name: starter
+image_type: venv
 additional_pip_packages:
 - aiosqlite
 - asyncpg

llama_stack/templates/template.py

@@ -29,6 +29,7 @@ from llama_stack.core.datatypes import (
 )
 from llama_stack.core.distribution import get_provider_registry
 from llama_stack.core.utils.dynamic import instantiate_class_type
+from llama_stack.core.utils.image_types import LlamaStackImageType
 from llama_stack.providers.utils.inference.model_registry import ProviderModelEntry
 from llama_stack.providers.utils.kvstore.config import SqliteKVStoreConfig
 from llama_stack.providers.utils.kvstore.config import get_pip_packages as get_kv_pip_packages
@@ -314,8 +315,7 @@ class DistributionTemplate(BaseModel):
                 container_image=self.container_image,
                 providers=build_providers,
             ),
-            image_type="conda",
-            image_name=self.name,
+            image_type=LlamaStackImageType.VENV.value,  # default to venv
             additional_pip_packages=sorted(set(additional_pip_packages)),
         )
 

llama_stack/templates/watsonx/build.yaml

@@ -35,16 +35,11 @@ distribution_spec:
     - provider_id: braintrust
       provider_type: inline::braintrust
     tool_runtime:
-    - provider_id: brave-search
-      provider_type: remote::brave-search
-    - provider_id: tavily-search
-      provider_type: remote::tavily-search
-    - provider_id: rag-runtime
-      provider_type: inline::rag-runtime
-    - provider_id: model-context-protocol
-      provider_type: remote::model-context-protocol
-image_type: conda
-image_name: watsonx
+    - provider_type: remote::brave-search
+    - provider_type: remote::tavily-search
+    - provider_type: inline::rag-runtime
+    - provider_type: remote::model-context-protocol
+image_type: venv
 additional_pip_packages:
 - sqlalchemy[asyncio]
 - aiosqlite