Merge pull request #41 from dlorenc/iso

Add scripts for building an iso

iso/.gitignore

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+minikube.iso

iso/Dockerfile

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+# TODO: Move this to somewhere on GCR and manage tags explicitly instead of
+# relying on latest.
+FROM boot2docker/boot2docker
+
+# Set the version of Docker and the expected sha.
+RUN echo "1.9.1" > $ROOTFS/etc/version
+ENV DOCKER_SHA 8824f8a67fbe55d1e52dcbebc74219ba8090006e
+
+# Add other dependencies here to $ROOTFS/
+ADD nsenter $ROOTFS/usr/bin/
+
+# Get a specific version of Docker. This will overwrite the binary installed
+# in the base image.
+# The --strip-components=3 flag will have to change as we switch docker versions
+# past 1.10.x. They changed the packaging format slightly.
+RUN rm -f /$ROOTFS/usr/local/bin/docker*
+RUN curl -fSL -o /tmp/dockerbin.tgz https://get.docker.com/builds/Linux/x86_64/docker-$(cat $ROOTFS/etc/version).tgz && \
+	# Check the sha1 matches.
+	if [ $DOCKER_SHA != $(sha1sum /tmp/dockerbin.tgz | cut -f1 -d ' ') ]; then echo "SHA mismatch!"; exit 1; fi && \
+    tar -zxvf /tmp/dockerbin.tgz -C "$ROOTFS/usr/local/bin" --strip-components=3 && \
+    rm /tmp/dockerbin.tgz
+
+RUN $ROOTFS/usr/local/bin/docker -v
+
+# Build the actual iso image
+RUN /make_iso.sh
+
+# Output it to transfer back to the host
+CMD ["cat", "boot2docker.iso"]

iso/README.md

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+# Scripts for building a VM iso based on boot2docker
+
+## Build instructions
+./build.sh
+
+## Test instructions
+To manually try out the built iso, you can run the following commands to create a VM:
+
+```shell
+VBoxManage createvm --name testminikube --ostype "Linux_64" --register
+VBoxManage storagectl foo --name "IDE Controller" --add ide
+VBoxManage storageattach foo --storagectl "IDE Controller" --port 0 --device 0 --type dvddrive --medium ./minikube.iso
+VBoxManage modifyvm foo --memory 1024 --vrde on --vrdeaddress 127.0.0.1 --vrdeport 3390 --vrdeauthtype null
+```
+
+Then use the VirtualBox gui to start and open a session.

iso/build.sh

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+#!/bin/bash
+set -e
+
+ISO=minikube.iso
+tmpdir=$(mktemp -d)
+echo "Building in $tmpdir."
+cp -r . $tmpdir/
+
+pushd $tmpdir
+# Get nsenter.
+docker run --rm jpetazzo/nsenter cat /nsenter > $tmpdir/nsenter && chmod +x $tmpdir/nsenter
+
+# Do the build.
+docker build -t iso .
+
+# Output the iso.
+docker run iso > $ISO
+
+popd
+mv $tmpdir/$ISO .
+
+# Clean up.
+rm -rf $tmpdir
+
+echo "Iso available at ./$ISO"