[RFC PATCH 2/2] automation: Add yocto containers with cache

[Bertrand Marquis <bertrand.marquis@xxxxxxx>]

Create yocto containers for kirkstone with a builder step to fill the
yocto cache by running the build script once.
Those containers depend on the kirkstone.dockerfile container to be
created and use it as base image.

To run a build test on one image the following command must be called
inside the container:
build-yocto.sh --xen-dir=XENSRC TARGET where
- XENSRC is the directory where xen sources are available in the
container
- TARGET is the build target (qemuarm64, qemuarm or qemux86_64)

In case of error, the script will return an error code and the logs will
be in /home/docker-build/logs.

!!!
The build of each container can take several hours depending on the
network bandwith (for downloading all sources) and the amount of
computing power on the machine where the docker images are created.
!!!

Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
---
 automation/build/Makefile                     |  2 ++
 .../build/yocto/kirkstone-qemuarm.dockerfile  | 28 +++++++++++++++++++
 .../yocto/kirkstone-qemuarm64.dockerfile      | 28 +++++++++++++++++++
 .../yocto/kirkstone-qemux86-64.dockerfile     | 28 +++++++++++++++++++
 4 files changed, 86 insertions(+)
 create mode 100644 automation/build/yocto/kirkstone-qemuarm.dockerfile
 create mode 100644 automation/build/yocto/kirkstone-qemuarm64.dockerfile
 create mode 100644 automation/build/yocto/kirkstone-qemux86-64.dockerfile

diff --git a/automation/build/Makefile b/automation/build/Makefile
index a4b2b85178..00e6f46090 100644
--- a/automation/build/Makefile
+++ b/automation/build/Makefile
@@ -16,5 +16,7 @@ help:
                $(DOCKER_CMD) push $(REGISTRY)/$(@D):$(@F); \
        fi
 
+yocto/kirkstone-%: yocto/kirkstone
+
 .PHONY: all
 all: $(CONTAINERS)
diff --git a/automation/build/yocto/kirkstone-qemuarm.dockerfile 
b/automation/build/yocto/kirkstone-qemuarm.dockerfile
new file mode 100644
index 0000000000..e3cdc4dcf3
--- /dev/null
+++ b/automation/build/yocto/kirkstone-qemuarm.dockerfile
@@ -0,0 +1,28 @@
+# Docker file to populate the initial sstate and download cache for yocto
+# for a specific target
+#
+# This requires the build-yocto.sh script to be in the same directory as this
+# dockerfile during the image creation
+#
+# Arguments that can be passed during image creation using --build-arg:
+# "from_image=img" to select the docker image and tag to start from
+# "target=qemuxxx": to select which target to build in this image
+
+ARG from_image=registry.gitlab.com/xen-project/xen/yocto:kirkstone
+
+FROM $from_image AS builder
+
+ARG target=qemuarm
+
+# This step can take one to several hours depending on your download bandwith
+# and the speed of your computer
+RUN /home/$USER_NAME/bin/build-yocto.sh $target
+
+FROM $from_image
+
+# Only copy the cache status
+COPY --from=builder /home/$USER_NAME/yocto-cache /home/$USER_NAME/yocto-cache/.
+
+LABEL maintainer.name="The Xen Project " \
+      maintainer.email="xen-devel@xxxxxxxxxxxxxxxxxxxx"
+
diff --git a/automation/build/yocto/kirkstone-qemuarm64.dockerfile 
b/automation/build/yocto/kirkstone-qemuarm64.dockerfile
new file mode 100644
index 0000000000..6045b6ac24
--- /dev/null
+++ b/automation/build/yocto/kirkstone-qemuarm64.dockerfile
@@ -0,0 +1,28 @@
+# Docker file to populate the initial sstate and download cache for yocto
+# for a specific target
+#
+# This requires the build-yocto.sh script to be in the same directory as this
+# dockerfile during the image creation
+#
+# Arguments that can be passed during image creation using --build-arg:
+# "from_image=img" to select the docker image and tag to start from
+# "target=qemuxxx": to select which target to build in this image
+
+ARG from_image=registry.gitlab.com/xen-project/xen/yocto:kirkstone
+
+FROM $from_image AS builder
+
+ARG target=qemuarm64
+
+# This step can take one to several hours depending on your download bandwith
+# and the speed of your computer
+RUN /home/$USER_NAME/bin/build-yocto.sh $target
+
+FROM $from_image
+
+# Only copy the cache status
+COPY --from=builder /home/$USER_NAME/yocto-cache /home/$USER_NAME/yocto-cache/.
+
+LABEL maintainer.name="The Xen Project " \
+      maintainer.email="xen-devel@xxxxxxxxxxxxxxxxxxxx"
+
diff --git a/automation/build/yocto/kirkstone-qemux86-64.dockerfile 
b/automation/build/yocto/kirkstone-qemux86-64.dockerfile
new file mode 100644
index 0000000000..35e2fdeb1e
--- /dev/null
+++ b/automation/build/yocto/kirkstone-qemux86-64.dockerfile
@@ -0,0 +1,28 @@
+# Docker file to populate the initial sstate and download cache for yocto
+# for a specific target
+#
+# This requires the build-yocto.sh script to be in the same directory as this
+# dockerfile during the image creation
+#
+# Arguments that can be passed during image creation using --build-arg:
+# "from_image=img" to select the docker image and tag to start from
+# "target=qemuxxx": to select which target to build in this image
+
+ARG from_image=registry.gitlab.com/xen-project/xen/yocto:kirkstone
+
+FROM $from_image AS builder
+
+ARG target=qemux86-64
+
+# This step can take one to several hours depending on your download bandwith
+# and the speed of your computer
+RUN /home/$USER_NAME/bin/build-yocto.sh $target
+
+FROM $from_image
+
+# Only copy the cache status
+COPY --from=builder /home/$USER_NAME/yocto-cache /home/$USER_NAME/yocto-cache/.
+
+LABEL maintainer.name="The Xen Project " \
+      maintainer.email="xen-devel@xxxxxxxxxxxxxxxxxxxx"
+
-- 
2.25.1