Multi arch builds (#15)

1. Add intel/arm container builds
2. Do not pre-load module on build so that arm modules don't fail intel builds and vice versa

.github/workflows/ci-modules.yaml

@@ -2,9 +2,21 @@ name: Build and Push PF_RING modules
 
 on:
   workflow_dispatch:
+    inputs:
+      tag:
+        type: choice
+        description: "Tag to build"
+        options:
+          - all
+          - canary
+      per-module:
+        type: boolean
+        description: "Build container per module"
+        default: true
 
 jobs:
   prepare-matrix:
+    if: inputs.per-module == 'true'
     runs-on: ubuntu-latest
     outputs:
       versions: ${{ steps.set-matrix.outputs.versions }}
@@ -60,6 +72,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -76,7 +91,7 @@ jobs:
           images: kubeshark/pf-ring-module
           tags: |
             type=raw,value={{date 'YYYYMMDD'}}
-            type=raw,value=all
+            type=raw,value=${{ inputs.tag}}
 
       - name: Build and push
         uses: docker/build-push-action@v5
@@ -85,6 +100,7 @@ jobs:
           file: ./modules/Dockerfile.all
           push: true
           tags: ${{ steps.meta.outputs.tags }}
+          platforms: linux/amd64,linux/arm64/v8
 
   upload-modules-to-s3:
     runs-on: ubuntu-latest

modules/Dockerfile.all

@@ -1,9 +1,8 @@
 # Build container with all available modules
 FROM alpine:3.18
 
-COPY ko/*.ko /tmp/modules/
-COPY scripts/load-all-modules.sh /opt/scripts/load-all-modules.sh
+COPY ko/*.ko /opt/modules/
 COPY scripts/entrypoint.sh /opt/scripts/entrypoint.sh
 
-RUN /opt/scripts/load-all-modules.sh
+RUN apk add kmod
 ENTRYPOINT [ "/opt/scripts/entrypoint.sh" ]

modules/Dockerfile.single

@@ -2,9 +2,8 @@
 FROM alpine:3.18
 ARG KERNEL_VERSION
 
-COPY ko/pf-ring-${KERNEL_VERSION}.ko /opt/lib/modules/${KERNEL_VERSION}/pf_ring.ko
+COPY ko/pf-ring-${KERNEL_VERSION}.ko /opt/modules/pf-ring-${KERNEL_VERSION}.ko
 COPY scripts/entrypoint.sh /opt/scripts/entrypoint.sh
 RUN apk add kmod
 
-RUN depmod -b /opt ${KERNEL_VERSION}
 ENTRYPOINT [ "/opt/scripts/entrypoint.sh" ]

modules/scripts/entrypoint.sh

@@ -1,26 +1,31 @@
 #!/bin/sh
 
 # Get the current kernel version
-current_kernel_version=$(uname -r)
+kernel_version=$(uname -r)
 
 # Check if the module directory exists for the current kernel
-module_path="/opt/lib/modules/${current_kernel_version}/pf_ring.ko"
+module_path="/opt/modules/pf-ring-${kernel_version}.ko"
 
 if [ -f "$module_path" ]; then
     # Check if the module is already loaded
     if ! lsmod | grep -q pf_ring; then
-        echo "Loading pf_ring module for kernel ${current_kernel_version}"
-        insmod $module_path
+        echo "Loading pf_ring module for kernel ${kernel_version}"
+        module_load_path="/opt/lib/modules/${kernel_version}/pf_ring.ko"
+        mkdir /opt/lib/modules/${kernel_version} -p
+        cp $module_path ${module_load_path}
+        depmod -b /opt ${kernel_version}
+        insmod ${module_load_path}
         if [ $? -ne 0 ]; then
-            echo "Failed to load module from $module_path"
+            echo "Failed to load module from ${module_load_path}"
             echo "Falling back to AF_PACKET"
             exit 0
         fi
+        echo "pf_ring module loaded for kernel ${kernel_version}"
     else
-        echo "pf_ring module is already loaded for kernel ${current_kernel_version}"
+        echo "pf_ring module is already loaded for kernel ${kernel_version}"
         exit 0
     fi
 else
-    echo "No pf_ring module found for the current kernel version ${current_kernel_version}"
+    echo "No pf_ring module found for the current kernel version ${kernel_version}"
     echo "Falling back to AF_PACKET"
 fi