initial specific VM formats support

Raw disk images are convenient and universal but there are custom formats like Qemu's qcow2 providing additional features, e.g. copy-on-write or space savings. All of this ultimately belongs to mkimage but in the mean time has been implemented here as well.

initial specific VM formats support
8a04d9b6 · Michael Shigorin · 90be07fb · 8a04d9b6 · 8a04d9b6 · 8a04d9b6
Commit 8a04d9b6 authored Jun 19, 2012 by Michael Shigorin
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Makefile Makefile +1 -1

vm.txt doc/vm.txt +4 -0

90-build-vm.mk features.in/build-vm/lib/90-build-vm.mk +17 -2

config.mk features.in/pack/config.mk +4 -2

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--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ endif
 # recursive make considered useful for m-p
 MAKE += -r --no-print-directory

-DIRECT_TARGETS := clean distclean check help help/distro help/ve
+DIRECT_TARGETS := clean distclean check help help/distro help/ve help/vm
 .PHONY: $(DIRECT_TARGETS)
 $(DIRECT_TARGETS):
 	@$(MAKE) -f main.mk $@

--- a/doc/vm.txt
+++ b/doc/vm.txt
@@ -13,6 +13,10 @@ mike ALL=NOPASSWD: /usr/share/mkimage-profiles/bin/tar2vm
 пользователю право выполнять с повышенными привилегиями доступный ему
 по записи скрипт равнозначно предоставлению полных привилегий root.

+Для работы с более специфичными форматами, чем raw ("буквальный"
+образ диска), потребуется утилита qemu-img из одноименного пакета;
+см. тж. вывод команды make help/vm
+
 Также потребуется пакет multipath-tools (/sbin/kpartx).

 Пример сборки и запуска VM:

--- a/features.in/build-vm/lib/90-build-vm.mk
+++ b/features.in/build-vm/lib/90-build-vm.mk
@@ -9,6 +9,7 @@ IMAGE_PACKAGES = $(SYSTEM_PACKAGES) \

 # intermediate chroot archive
 VM_TARBALL := $(IMAGE_OUTDIR)/$(IMAGE_NAME).tar
+VM_RAWDISK := $(IMAGE_OUTDIR)/$(IMAGE_NAME).raw

 check-sudo:
 	@if ! type -t sudo >&/dev/null; then \
@@ -16,15 +17,29 @@ check-sudo:
 		exit 1; \
 	fi

-convert-image: check-sudo
+prepare-image: check-sudo
 	@if ! sudo $(TOPDIR)/bin/tar2vm \
-		"$(VM_TARBALL)" "$(IMAGE_OUTPATH)" $$VM_SIZE; then \
+		"$(VM_TARBALL)" "$(VM_RAWDISK)" $$VM_SIZE; then \
 		echo "** error: sudo tar2vm failed, see also doc/vm.txt" >&2; \
 		exit 1; \
 	fi

+convert-image: prepare-image
+	@case "$(IMAGE_TYPE)" in \
+	"img") VM_FORMAT="raw";; \
+	"vhd") VM_FORMAT="vpc";; \
+	*) VM_FORMAT="$(IMAGE_TYPE)"; \
+	esac; \
+	if ! type -t qemu-img >&/dev/null; then \
+		echo "** warning: qemu-img not available" >&2; \
+	else \
+		qemu-img convert -O "$$VM_FORMAT" \
+			"$(VM_RAWDISK)" "$(IMAGE_OUTPATH)"; \
+	fi
+
 run-image-scripts: GLOBAL_ROOTPW := $(ROOTPW)

+# override
 pack-image: MKI_PACK_RESULTS := tar:$(VM_TARBALL)

 all: $(GLOBAL_DEBUG) build-image copy-tree run-image-scripts pack-image \

--- a/features.in/pack/config.mk
+++ b/features.in/pack/config.mk
+### this might really belong to build-*...
+
 # distributions
 DISTRO_EXTS := .iso

@@ -38,6 +40,6 @@ $(foreach c,$(VE_ARCHIVES), \
 		$(eval $(call PACK_compressors,$(c),$(z)))))

 # virtual machines
-VM_EXTS := .img
+VM_EXTS := .img .qcow2 .vdi .vmdk .vhd

-use/pack/img: use/pack; @:
+$(VM_EXTS:.%=use/pack/%): use/pack; @: