Draft for making OTA images

makefile

@@ -39,6 +39,7 @@ BUILD_VERSION   ?= $(KUBE_VERSION)
 BUILD_DATE      := $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
 BUILD_GIT       := $(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_INFO_FILE := $(OUT_DIR)/build-info
+BUILD_BASE_TAG := $(shell docker image inspect monok8s/build-base:dev | jq -r '.[].Id' | cut -d':' -f2 | cut -c -8 || echo dev)
 
 # ---- File groups -------------------------------------------------------------
 
@@ -148,6 +149,8 @@ $(BUILD_BASE_STAMP): $(BUILD_BASE_DEPS) | $(OUT_DIR)
 		-f docker/build-base.Dockerfile \
 		--build-arg TAG=$(TAG) \
 		-t $(DOCKER_IMAGE_ROOT)/build-base:$(TAG) .
+	@iid=$$(docker image inspect monok8s/build-base:$(TAG) | jq -r '.[].Id' | cut -d':' -f2 | cut -c -8); \
+	docker tag monok8s/build-base:$(TAG) monok8s/build-base:$$iid; \
 	touch $@
 
 $(KERNEL_IMAGE): $(KERNEL_DEPS) | $(OUT_DIR)
@@ -191,6 +194,7 @@ $(BOARD_ITB): $(ITB_DEPS) | $(OUT_DIR)
 $(RELEASE_IMAGE): $(RELEASE_DEPS) | $(OUT_DIR)
 	docker build \
 		-f docker/alpine.Dockerfile \
+		--no-cache \
 		--build-arg DOCKER_IMAGE_ROOT=$(DOCKER_IMAGE_ROOT) \
 		--build-arg TAG=$(TAG) \
 		--build-arg ALPINE_ARCH=$(ALPINE_ARCH) \
@@ -198,6 +202,7 @@ $(RELEASE_IMAGE): $(RELEASE_DEPS) | $(OUT_DIR)
 		--build-arg KUBE_VERSION=$(KUBE_VERSION) \
 		--build-arg CRIO_VERSION=$(CRIO_VERSION) \
 		--build-arg DEVICE_TREE_TARGET=$(DEVICE_TREE_TARGET) \
+		--build-arg BUILD_BASE_TAG=$(BUILD_BASE_TAG) \
 		-t $(DOCKER_IMAGE_ROOT)/buildenv-alpine:$(TAG) .
 
 	@cid=$$(docker create \
@@ -219,6 +224,7 @@ $(RELEASE_IMAGE): $(RELEASE_DEPS) | $(OUT_DIR)
 		bash -lc '/build-rootfs.sh'); \
 	docker start -a $$cid; \
 	docker cp $$cid:/build/output.img.gz $@; \
+	docker cp $$cid:/build/rootfs.ext4.zst $(OUT_DIR)/rootfs.ext4.zst; \
 	docker rm $$cid
 
 	test -f $@