contrib/git-sync: add demo

contrib/git-sync/demo/README.md

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+# git-blog-demo
+
+This demo shows how to use the `git-sync` sidekick container along side `volumes` and `volumeMounts` to create a markdown powered blog.
+
+## How it works
+
+The pod is composed of 3 containers that share directories using 2 volumes:
+
+- The `git-sync` container clones a git repo into the `markdown` volume
+- The `hugo` container read from the `markdown` volume and render it into the `html` volume.
+- The `nginx` container serve the content from the `html` volume.
+
+## Usage
+
+Build the demo containers, and push them to a registry
+``
+docker build -t <some-registry>/git-sync ..
+docker build -t <some-registry>/hugo hugo/
+docker push <some-registry>/hugo <some-registry>/git-sync
+```
+
+Create the pod and the service for the blog
+```
+kubectl pods create config/pod.html
+kubectl services create config/pod.html
+```
+
+Open the external ip in your browser

contrib/git-sync/demo/blog/config.toml

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+baseurl = "http://example.com"
+languageCode = "en-us"
+title = "example blog"

contrib/git-sync/demo/blog/content/about.md

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++++
+date = "2014-12-19T15:29:48-08:00"
+draft = true
+title = "about"
++++
+
+## A headline
+
+Some content about the blog.

contrib/git-sync/demo/blog/content/post/first.md

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++++
+date = "2014-12-19T15:30:18-08:00"
+draft = true
+title = "first"
++++
+
+## first port
+
+This is the first post.

contrib/git-sync/demo/config/pod.yaml

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+id: blog-pod
+kind: Pod
+apiVersion: v1beta1
+desiredState:
+  manifest:
+    version: v1beta1
+    containers:
+    - name: git-sync
+      image: proppy/git-sync
+      imagePullPolicy: PullAlways
+      env::
+        - name: GIT_SYNC_REPO
+          value: https://github.com/proppy/blog.git
+        - name: GIT_SYNC_DEST
+          value: /git
+      volumeMounts:
+      - name: markdown
+        mountPath: /git
+    - name: hugo
+      image: proppy/hugo
+      imagePullPolicy: PullAlways
+      env:
+      - name: SRC
+        value: /src
+      - name: BUILD_DRAFT
+        value: 'true'
+      - name: BASE_URL
+        value: kube.proppy.sh
+      volumeMounts:
+      - name: markdown
+        mountPath: /src
+      - name: html
+        mountPath: /dest
+    - name: nginx
+      image: nginx
+      volumeMounts:
+      - name: html
+        mountPath: /usr/share/nginx/html
+      ports:
+      - name: http-server
+        containerPort: 80
+    volumes:
+    - name: markdown
+      source:
+        emptyDir: {}
+    - name: html
+      source:
+        emptyDir: {}
+labels:
+  name: blog

contrib/git-sync/demo/config/service.yaml

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+id: blog-service
+kind: Service
+apiVersion: v1beta1
+port: 80
+containerPort: http-server
+selector:
+  name: blog
+createExternalLoadBalancer: true

contrib/git-sync/demo/hugo/Dockerfile

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+FROM golang
+RUN go get -v github.com/spf13/hugo
+RUN git clone --recursive https://github.com/spf13/hugoThemes.git /themes
+VOLUME ["/src", "/dest"]
+EXPOSE 1313
+ENV SRC /src
+ENV DEST /dest
+ENV THEME hyde
+ENV BUILD_DRAFT false
+ENV BASE_URL ""
+ADD run-hugo /run-hugo
+ENTRYPOINT ["/run-hugo"]
+CMD ["server", "--source=${SRC}", "--theme=${THEME}", "--buildDrafts=${BUILD_DRAFT}", "--baseUrl=${BASE_URL}", "--watch", "--destination=${DEST}", "--appendPort=false"]

contrib/git-sync/demo/hugo/run-hugo

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+#!/bin/bash
+set -ex
+if [ ! -d ${SRC}/themes ]; then
+    ln -s /themes ${SRC}/themes
+fi
+hugo $(eval echo $*) # force default CMD env expansion