initial version

Signed-off-by: Kornilios Kourtis <[email protected]>

Makefile

@@ -0,0 +1,11 @@
+
+OCIORG ?= quay.io/lvh-images
+LVH           ?= $(OCIORG)/lvh
+ROOT_BUILDER  ?= $(OCIORG)/root-builder
+ROOT_IMAGES   ?= $(OCIORG)/root-images
+DOCKER ?= docker
+
+.PHONY: images
+images:
+	$(DOCKER) build -f dockerfiles/root-builder -t $(ROOT_BUILDER) .
+	$(DOCKER) build -f dockerfiles/root-images  -t $(ROOT_IMAGES)  .

README.md

@@ -0,0 +1,12 @@
+This repository contains (little-vm-helper)[https://github.com/cilium/little-vm-helper]
+configuration files and dockerfiles for building kernel and rootfs images.
+
+- [configuration](_data/images.json) for building root images (single image for now)
+- [dockerfile](./dockerfiles/root-builder) for a container that can be used to build root images
+- [dockerfile](./dockerfiles/root-images) for a container with the root images
+
+### Issues
+ - Using docker build means that there will be no /dev/kvm device in the builder which will
+   unfortunately result in slower builds than what you would get otherwise. There are some hints
+   in https://github.com/moby/moby/issues/1916 that this might be solved using buildx, but I'm not
+   sure how.

_data/.dockerignore

@@ -0,0 +1,2 @@
+images
+kernels

_data/.gitignore

@@ -0,0 +1,2 @@
+/images
+/kernels

_data/images.json

@@ -0,0 +1,24 @@
+[
+    {
+        "name": "base.qcow2",
+        "packages": [
+            "less",
+            "vim",
+            "sudo",
+            "openssh-server",
+            "curl",
+	    "bpftool",
+	    "iproute2",
+	    "util-linux"
+        ],
+        "actions": [
+            {
+                "comment": "disable password for root",
+                "op": {
+                    "Cmd": "passwd -d root"
+                },
+                "type": "run-command"
+            }
+        ]
+    }
+]

dockerfiles/root-builder

@@ -0,0 +1,9 @@
+# vim: set ft=dockerfile:
+FROM quay.io/lvh-images/lvh AS lvh
+
+FROM debian:sid
+WORKDIR /
+RUN  apt-get update -yq &&  \
+     apt-get upgrade -yq &&  \
+     apt-get install -yq  mmdebstrap libguestfs-tools qemu-utils extlinux
+COPY --from=lvh /usr/bin/lvh /usr/bin/lvh

dockerfiles/root-images

@@ -0,0 +1,10 @@
+# vim: set ft=dockerfile:
+FROM quay.io/lvh-images/root-builder AS builder
+COPY _data /data
+WORKDIR /data
+# mmdebstrap outputs messages in stderr, so we redirect stderr
+RUN lvh images build --dir . 2>&1
+
+FROM busybox
+COPY --from=builder /data/images/base.qcow2 /images/base.qcow2
+RUN gzip /images/base.qcow2