Create Jupyter notebook image for codelabs (#214)

* Create Jupyter notebook image for codelabs

* Add makefile

codelab-image/Dockerfile

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+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+FROM gcr.io/kubeflow-images-public/tensorflow-1.8.0-notebook-cpu
+
+ENV KS_VER ks_0.12.0-rc1_linux_amd64
+
+RUN cd /tmp && \
+    wget --quiet https://github.com/ksonnet/ksonnet/releases/download/v0.12.0-rc1/$KS_VER.tar.gz && \
+    tar -xvf $KS_VER.tar.gz && \
+    rm $KS_VER.tar.gz
+
+ENV PATH $PATH:/tmp/$KS_VER
+
+RUN pip install --no-cache-dir annoy ktext nltk Pillow pydot

codelab-image/Makefile

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+IMG = gcr.io/kubeflow-images-public/kubeflow-codelab-notebook
+
+# List any changed  files. We only include files in the notebooks directory.
+# because that is the code in the docker image.
+# In particular we exclude changes to the ksonnet configs.
+CHANGED_FILES := $(shell git diff-files --relative=codelab-image)
+
+ifeq ($(strip $(CHANGED_FILES)),)
+# Changed files is empty; not dirty
+# Don't include --dirty because it could be dirty if files outside the ones we care
+# about changed.
+GIT_VERSION := $(shell git describe --always)
+else
+GIT_VERSION := $(shell git describe --always)-dirty-$(shell git diff | shasum -a256 | cut -c -6)
+endif
+
+TAG := $(shell date +v%Y%m%d)-$(GIT_VERSION)
+all: build
+
+# To build without the cache set the environment variable
+# export DOCKER_BUILD_OPTS=--no-cache
+build:
+	docker build ${DOCKER_BUILD_OPTS} -t $(IMG):$(TAG) . \
+           --label=git-verions=$(GIT_VERSION)
+	docker tag $(IMG):$(TAG) $(IMG):latest
+	@echo Built $(IMG):latest
+	@echo Built $(IMG):$(TAG)
+
+
+# Build but don't attach the latest tag. This allows manual testing/inspection of the image
+# first.
+push: build
+	gcloud docker -- push $(IMG):$(TAG)
+	@echo Pushed $(IMG) with  :$(TAG) tags
+
+push-latest: push
+	gcloud container images add-tag --quiet $(IMG):$(TAG) $(IMG):latest --verbosity=info
+	echo created $(IMG):latest

codelab-image/README.md

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+# Kubeflow Codelab Notebook
+
+This is a Jupyter notebook image intended for Kubeflow codelabs. It is based off the
+public TensorFlow notebook, with the following additional components installed:
+* ksonnet (version 0.12.0-rc1)
+* annoy
+* ktext
+* nltk
+* Pillow
+* pydot
+
+To build this image, run:
+```
+make build
+```
+then
+```
+make push
+```
+
+This image is published at `gcr.io/kubeflow-images-public/kubeflow-codelab-notebook`.