Replace mdev with udev:

.gitignore

@@ -4,7 +4,6 @@ dist/
 .env
 !/hook-bootkit/
 !/hook-docker/
-!/hook-mdev/
 hook*.*.yaml
 !linuxkit-templates
 out/

README.md

@@ -150,7 +150,7 @@ The most important environment variables are:
 
 - There's a distributed GitHub Actions build workflow `"matrix"`.
   - The bash build system produces JSON objects that drive the matrix stages:
-    - One matrix is per-arch, and builds all the containers whose source is hosted in this repo (bootkit, docker, mdev)
+    - One matrix is per-arch, and builds all the containers whose source is hosted in this repo (bootkit, docker, udev)
     - Second matrix is per-flavor(/kernel), and builds the kernel
     - Third matrix, depending on the other two, is per-flavor(/kernel), and builds Hook itself (via LinuxKit) and prepares a .tar.gz into GH artifacts
 

bash/hook-lk-containers.sh

@@ -9,7 +9,7 @@ function build_all_hook_linuxkit_containers() {
 	# # NOTE: linuxkit containers must be in the images/ directory
 	build_hook_linuxkit_container hook-bootkit "HOOK_CONTAINER_BOOTKIT_IMAGE"
 	build_hook_linuxkit_container hook-docker "HOOK_CONTAINER_DOCKER_IMAGE"
-	build_hook_linuxkit_container hook-mdev "HOOK_CONTAINER_MDEV_IMAGE"
+	build_hook_linuxkit_container hook-udev "HOOK_CONTAINER_UDEV_IMAGE"
 	build_hook_linuxkit_container hook-containerd "HOOK_CONTAINER_CONTAINERD_IMAGE"
 	build_hook_linuxkit_container hook-runc "HOOK_CONTAINER_RUNC_IMAGE"
 	build_hook_linuxkit_container hook-embedded "HOOK_CONTAINER_EMBEDDED_IMAGE"

bash/json-matrix.sh

@@ -21,7 +21,7 @@
 # - CI_RUNNER_LK is the runner to use for all linuxkit builds
 # - CI_RUNNER_AMD64 is the runner to use for all AMD64 things
 # - CI_RUNNER is the runner to use for everything
-## LK containers (hook-bootkit, hook-docker, hook-mdev): (3):
+## LK containers (hook-bootkit, hook-docker, hook-udev): (3):
 # - CI_RUNNER_LK_CONTAINERS_AMD64 is the runner to use for amd64 linuxkit containers builds
 # - CI_RUNNER_LK_CONTAINERS is the runner to use for all linuxkit containers builds
 # - CI_RUNNER_AMD64 is the runner to use for all AMD64 things

files/dhcp.sh

@@ -9,11 +9,11 @@ set -x
 
 run_dhcp_client() {
 	one_shot="$1"
-	al="eth*"
+	al="en*"
 
 	vlan_id=$(sed -n 's/.* vlan_id=\([0-9]*\).*/\1/p' /proc/cmdline)
 	if [ -n "$vlan_id" ]; then
-		al="eth*.*"
+		al="en*.*"
 	fi
 
 	if [ "$one_shot" = "true" ]; then

files/dhcpcd.conf

@@ -1,4 +1,4 @@
-# Default values for dhcpcd from linuxkit/dhcpcd:v0.8 with `allowinterfaces eth*` removed
+# Default values for dhcpcd from linuxkit/dhcpcd:v0.8 with `allowinterfaces en*` removed
 # This allows the `--allowinterfaces` flag of dhcpcd to specify the allowinterfaces.
 hostname
 clientid

files/vlan.sh

@@ -71,8 +71,8 @@ function add_vlan_interface() {
 			ifname="$(get_interface_name ${hw_addr})"
 			echo "VLAN handling - vlan_id: '${vlan_id}', hw_addr: '${hw_addr}', found interface: '${ifname}'" >&2
 		else
-			echo "VLAN handling - vlan_id: '${vlan_id}', hw_addr: '${hw_addr}', no hw_addr found in kernel commandline; default ifname to eth0." >&2
-			ifname="eth0"
+			echo "VLAN handling - vlan_id: '${vlan_id}', hw_addr: '${hw_addr}', no hw_addr found in kernel commandline; cannot set vlan interface." >&2
+			ifname=""
 		fi
 
 		if [ -n "$ifname" ]; then

images/hook-udev/Dockerfile

@@ -0,0 +1,9 @@
+FROM debian:12-slim AS base
+
+RUN DEBIAN_FRONTEND=noninteractive apt update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends udev && \
+    apt-get clean autoclean && \
+    apt-get autoremove --yes && \
+    rm -rf /var/lib/apt /var/lib/dpkg /var/lib/cache /var/lib/log /var/cache/* /usr/lib/apt/* /usr/share/*
+
+CMD ["/etc/init.d/udev", "start"]

linuxkit-templates/hook.template.yaml

@@ -5,7 +5,7 @@
 # - HOOK_KERNEL_VERSION: ${HOOK_KERNEL_VERSION}
 # - HOOK_CONTAINER_BOOTKIT_IMAGE: ${HOOK_CONTAINER_BOOTKIT_IMAGE}
 # - HOOK_CONTAINER_DOCKER_IMAGE: ${HOOK_CONTAINER_DOCKER_IMAGE}
-# - HOOK_CONTAINER_MDEV_IMAGE: ${HOOK_CONTAINER_MDEV_IMAGE}
+# - HOOK_CONTAINER_UDEV_IMAGE: ${HOOK_CONTAINER_UDEV_IMAGE}
 # - HOOK_CONTAINER_CONTAINERD_IMAGE: ${HOOK_CONTAINER_CONTAINERD_IMAGE}
 # - HOOK_CONTAINER_RUNC_IMAGE: ${HOOK_CONTAINER_RUNC_IMAGE}
 # - HOOK_CONTAINER_EMBEDDED_IMAGE: ${HOOK_CONTAINER_EMBEDDED_IMAGE}
@@ -41,6 +41,19 @@ onboot:
     image: linuxkit/modprobe:v1.0.0
     command: [ "modprobe", "cdc_ncm" ] # for usb ethernet dongles
 
+  - name: udev
+    image: "${HOOK_CONTAINER_UDEV_IMAGE}"
+    capabilities:
+      - all
+    binds:
+      - /dev:/dev
+      - /sys:/sys
+      - /lib/modules:/lib/modules
+    rootfsPropagation: shared
+    devices:
+      - path: all
+        type: b
+
   - name: dhcpcd-once
     image: linuxkit/dhcpcd:v1.0.0
     command: [ "/etc/ip/dhcp.sh", "true" ] # 2nd paramter is one-shot true/false: true for onboot, false for services
@@ -64,19 +77,6 @@ services:
   - name: ntpd
     image: linuxkit/openntpd:v1.0.0
 
-  - name: mdev
-    image: "${HOOK_CONTAINER_MDEV_IMAGE}"
-    command: [ "mdev", "-v", "-S", "-df" ]
-    capabilities:
-      - all
-    binds:
-      - /dev/:/dev/
-      - /lib/modules:lib/modules
-    rootfsPropagation: shared
-    devices:
-      - path: all
-        type: b
-
   - name: getty
     image: linuxkit/getty:v1.0.0
     capabilities: