Merge pull request #692 from s-urbaniak/minikube-iso

add buildroot based minikube-iso build infrastructure

Makefile

@@ -72,7 +72,17 @@ localkube-image: out/localkube
 	make -C deploy/docker VERSION=$(VERSION)
 
 iso:
-	cd deploy/iso && ./build.sh
+	cd deploy/iso/boot2docker && ./build.sh
+
+minikube-iso:
+	[ ! -e $(BUILD_DIR)/buildroot ] && \
+		mkdir -p $(BUILD_DIR) && \
+		git clone https://github.com/buildroot/buildroot $(BUILD_DIR)/buildroot && \
+		cd $(BUILD_DIR)/buildroot && \
+		git checkout 2016.08 && \
+		make BR2_EXTERNAL=../../deploy/iso/minikube-iso minikube_defconfig && \
+		cd ../..
+	cd $(BUILD_DIR)/buildroot && make
 
 .PHONY: integration
 integration: out/minikube

deploy/iso/minikube-iso/Config.in

@@ -0,0 +1 @@
+source "$BR2_EXTERNAL/package/Config.in"

deploy/iso/minikube-iso/README.md

@@ -0,0 +1,116 @@
+## minikube ISO image
+
+This includes the configuration for an alternative bootable ISO image meant to be used in conjection with minikube.
+
+It includes:
+- systemd as the init system
+- rkt
+- docker
+
+## Configurations
+
+The following configurations have been tested:
+
+* OSX
+  * Virtualbox
+  * VMware Fusion
+
+* Linux
+  * Virtualbox
+  * KVM
+
+The following configurations are known to have issues currently:
+
+* OSX
+  * xhyve (https://github.com/coreos/minikube-iso/issues/17)
+
+## Hacking
+
+### Build instructions
+
+```
+$ git clone https://github.com/kubernetes/minikube
+$ cd minikube
+$ make minikube-iso
+```
+
+The bootable ISO image will be available in `out/buildroot/output/images/rootfs.iso9660`.
+
+### Testing local minikube changes
+
+To test a local build of minikube, include a `kubernetes-version` flag with a path to the `localkube` output from your source build directory:
+
+```
+$ cd minikube
+$ ./out/minikube start \
+    --container-runtime=rkt \
+    --network-plugin=cni \
+    --kubernetes-version=file://$HOME/minikube/src/k8s.io/minikube/out/localkube \
+    --iso-url=https://github.com/coreos/minikube-iso/releases/download/v0.0.5/minikube-v0.0.5.iso
+```
+
+### Testing local minikube-iso changes
+
+To test a local build of minikube-iso, start a web server (i.e. Caddy) to serve the ISO image, and start `minikube` with an `--iso-url` pointing to localhost:
+
+```
+$ cd $HOME/src/minikube/src/k8s.io/minikube
+$ cd ./out/buildroot/output/images
+$ caddy browse "log stdout"
+Activating privacy features... done.
+http://:2015
+```
+
+In another terminal:
+
+```
+$ minikube start --iso-url=http://localhost:2015/rootfs.iso9660
+```
+
+### Buildroot configuration
+
+To change the buildroot configuration, execute:
+
+```
+$ cd out/buildroot
+$ make menuconfig
+$ make
+```
+
+To change the kernel configuration, execute:
+
+```
+$ cd out/buildroot
+$ make linux-menuconfig
+$ make
+```
+
+The last commands copies changes made to the kernel configuration to the minikube-iso defconfig.
+
+### Saving buildroot/kernel configuration changes
+
+To save any buildroot configuration changes made with `make menuconfig`, execute:
+
+```
+$ cd out/buildroot
+$ make savedefconfig
+```
+
+The changes will be reflected in the `minikube-iso/configs/minikube_defconfig` file.
+
+```
+$ git stat
+## master
+ M deploy/iso/minikube-iso/configs/minikube_defconfig
+```
+
+To save any kernel configuration changes made with `make linux-menuconfig`, execute:
+
+```
+$ cd out/buildroot
+$ make linux-savedefconfig
+$ cp output/build/linux-4.7.2/defconfig \
+    ../../deploy/iso/minikube-iso/board/coreos/minikube/linux-4.7_defconfig
+```
+
+The changes will be reflected in the `deploy/iso/minikube-iso/configs/minikube_defconfig` file.

deploy/iso/minikube-iso/board/coreos/minikube/isolinux.cfg

@@ -0,0 +1,5 @@
+default 1
+label 1
+      kernel /boot/bzImage
+      initrd /boot/initrd
+      append root=/dev/sr0 loglevel=3 console=tty0 noembed nomodeset norestore waitusb=10