build: disable cache export for frontend build in ci (#5365)

Signed-off-by: Tushar Sharma <tusharma@nvidia.com>
Signed-off-by: Dillon Cullinan <dcullinan92@gmail.com>
Co-authored-by: Dillon Cullinan <dcullinan92@gmail.com>

.github/actions/docker-build/action.yml

@@ -108,13 +108,16 @@ runs:
 
         # Collect optional overrides provided by the workflow
         # Set base cache args and set --cache-to if this is a main commit
+        # TODO: Fix this - Skip cache for frontend target - a different docker driver is used for the EPP build, which causes issues with cache export
         EXTRA_ARGS=""
+        if [[ "${{ inputs.target }}" != "frontend" ]]; then
           EXTRA_ARGS="--cache-to type=inline "
           EXTRA_ARGS+="--cache-from type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache "
           EXTRA_ARGS+="--cache-from type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:main-${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/} "
           if [[ "$GITHUB_REF_NAME" == "main" ]]; then
             EXTRA_ARGS+="--cache-to type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache,mode=max "
           fi
+        fi
 
         echo "$EXTRA_ARGS"
         # Collect optional overrides provided by the workflow

.github/workflows/build-frontend-image.yaml

@@ -8,6 +8,7 @@ on:
     branches:
     - main
     - release/*.*.*
+    - "pull-request/[0-9]+"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name == 'main' && github.run_id || github.ref_name }}

container/Dockerfile.epp

@@ -17,13 +17,14 @@
 
 # Dockerfile.epp - Custom Dockerfile for GAIE EPP. This is to be used with the deploy/inference-gateway/build-epp-dynamo.sh
 
-ARG BUILDER_IMAGE=golang:1.24
-ARG BASE_IMAGE=ubuntu:22.04
+ARG DOCKER_PROXY
+ARG BUILDER_IMAGE="golang:1.24"
+ARG BASE_IMAGE="ubuntu:22.04"
 
 ############################
 # Builder
 ############################
-FROM ${BUILDER_IMAGE} AS builder
+FROM ${DOCKER_PROXY}${BUILDER_IMAGE} AS builder
 
 ENV CGO_ENABLED=1
 # be explicit; helps cgo when linking libstdc++
@@ -66,7 +67,7 @@ RUN go build \
 ############################
 # Runtime
 ############################
-FROM ${BASE_IMAGE} AS runtime
+FROM ${DOCKER_PROXY}${BASE_IMAGE} AS runtime
 
 ARG DYNAMO_COMMIT_SHA
 ENV DYNAMO_COMMIT_SHA=$DYNAMO_COMMIT_SHA

container/build.sh

@@ -997,6 +997,12 @@ if [[ ${TARGET^^} == "FRONTEND" ]]; then
     export GAIE_DIR="${GAIE_CLONE_DIR}"
     export DYNAMO_DIR="${BUILD_CONTEXT}"
 
+    # Set DOCKER_PROXY from ECR_HOSTNAME if available (for pulling base images through proxy)
+    if [[ -n "${ECR_HOSTNAME}" ]]; then
+        export DOCKER_PROXY="${ECR_HOSTNAME}/dockerhub/"
+        echo "Using DOCKER_PROXY: ${DOCKER_PROXY}"
+    fi
+
     $RUN_PREFIX bash ${DYNAMO_DIR}/deploy/inference-gateway/build-epp-dynamo.sh
 
     # Set EPP image tag (matches what build-epp-dynamo.sh produces)

deploy/inference-gateway/build-epp-dynamo.sh

@@ -97,6 +97,14 @@ fi
 
 # Step 6: Build the EPP image
 echo "Building the custom EPP image for GAIE..."
-make dynamo-image-local-load
+
+# Build make args - pass DOCKER_PROXY if set (e.g., from ECR_HOSTNAME)
+MAKE_ARGS=""
+if [[ -n "${DOCKER_PROXY}" ]]; then
+    echo "Using DOCKER_PROXY: ${DOCKER_PROXY}"
+    MAKE_ARGS+="DOCKER_PROXY=${DOCKER_PROXY} "
+fi
+
+make ${MAKE_ARGS} dynamo-image-local-load
 
 echo "EPP image with Dynamo KV routing built"

deploy/inference-gateway/epp-patches/v0.8.0/gaie.patch

@@ -41,7 +41,7 @@ diff --git a/Makefile b/Makefile
 index dee7e99..d3f9ec7 100644
 --- a/Makefile
 +++ b/Makefile
-@@ -170,6 +170,48 @@ verify-all:
+@@ -170,6 +170,49 @@ verify-all:
  
  ##@ Build
  
@@ -67,6 +67,7 @@ index dee7e99..d3f9ec7 100644
 +dynamo-image-build: ## Build the Dynamo EPP image using Docker Buildx with CGO support.
 +	$(IMAGE_BUILD_CMD) -f Dockerfile.dynamo -t $(IMAGE_TAG) \
 +		--platform=$(PLATFORMS) \
++		--build-arg DOCKER_PROXY=$(DOCKER_PROXY) \
 +		--build-arg BASE_IMAGE=ubuntu:24.04 \
 +		--build-arg BUILDER_IMAGE=$(BUILDER_IMAGE) \
 +		--build-arg COMMIT_SHA=${GIT_COMMIT_SHA} \