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Code Issues Projects Releases Wiki Activity

Updated guestbook based on suggestions in the pull request

Browse Source 
Port of current guestbook's README.md

Fix guestbook pod and service names

Add go boilerplate

Use role label for redis pods

Give service.containerPort a name based value

This gives better env variable keys like REDIS_MASTER_SERVICE_REDIS_SERVER_ADDR, etc.

Avoid unnecessarily long names for service (esp in env vars)

Adding guestbook deploy/destroy scripts for k8s

These are probably only useful for quick testing. Maybe remove them
before merging the pull request.

Part of avoiding long names for services

Update Dockerfiles to git clone from Google's repo

Use correct service names while deleting them

Fix the script usage path.

K8s is not go gettable. Use git clone instead.

Using my fork in the Dockerfile to release and update to the docker hub
image.

Doesn't delete all pods if you remove controller too soon

Run the command in a shell to substitute env vars. Workaround for GoogleCloudPlatform/kubernetes#1309

GoogleCloudPlatform in lieu of my fork in Dckrfile

Some directory structure changes for guestbook src

README that explains the build process for source

Strip down the html and css to absolute essentials

Reformat JS according to Google's guidelines

Also added code to set random colors for elements.

Handle repetitive error checks using a common func

Also uses @roberthbailey’s stripped down code for reading env vars

infoString isn't really a string. Use info instead

Remove deploy.sh/destroy.sh scripts

Bind submit instead of keypress to capture submit

Add links to /env and /info in the footer

Reformat the JS

Incorporating suggestions by @filbranden

License boilerplate and some fixes to release.sh

Update README.md

Update README.md

Add building on boot2docker info to README

Accept docker bin path as a param for building

Use kubernetes user to host the image on registry

Don't get included in k8s's recursive build deps

https://github.com/GoogleCloudPlatform/kubernetes/pull/1299#discussion_r
17638061
This commit is contained in:
Gurpartap Singh 2014-09-12 23:05:02 +05:30
parent 13f79b00a0
commit b7d1b1ac3c
28 changed files with 605 additions and 350 deletions
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174
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## GuestBook example
This example shows how to build a simple multi-tier web application using Kubernetes and Docker.
The example combines a web frontend, a redis master for storage and a replicated set of redis slaves.
### Step Zero: Prerequisites
This example assumes that you have forked the repository and [turned up a Kubernetes cluster](https://github.com/GoogleCloudPlatform/kubernetes#contents):
```shell
$ cd kubernetes
$ hack/dev-build-and-up.sh
```
### Step One: Turn up the redis master.
Use the file `examples/guestbook-go/redis-master-pod.json` which describes a single pod running a redis key-value server in a container.
Create the redis pod in your Kubernetes cluster using the `kubecfg` CLI:
```shell
$ cluster/kubecfg.sh -c examples/guestbook-go/redis-master-pod.json create pods
```
Once that's up you can list the pods in the cluster, to verify that the master is running:
```shell
$ cluster/kubecfg.sh list pods
```
You'll see a single redis master pod. It will also display the machine that the pod is running on once it gets placed (may take up to thirty seconds).
```
ID Image(s) Host Labels Status
---------- ---------- ---------- ---------- ----------
redis-master-pod gurpartap/redis kubernetes-minion-3.c.briandpe-api.internal name=redis,role=master Running
```
If you ssh to that machine, you can run `docker ps` to see the actual pod:
```shell
$ gcutil ssh --zone us-central1-b kubernetes-minion-3
$ sudo docker ps
me@kubernetes-minion-3:~$ sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS
e443647cd064 gurpartap/redis:latest redis-server /etc/r 22 minutes ago Up 22 minutes
```
(Note that initial `docker pull` may take a few minutes, depending on network conditions.)
### Step Two: Turn up the master service.
A Kubernetes 'service' is a named load balancer that proxies traffic to one or more containers. The services in a Kubernetes cluster are discoverable inside other containers via environment variables. Services find the containers to load balance based on pod labels.
The pod that you created in Step One has the label `name=redis` and `role=master`. The selector field of the service determines which pods will receive the traffic sent to the service. Use the file `examples/guestbook-go/redis-master-service.json`
To create the service with the `kubecfg` cli:
```shell
$ cluster/kubecfg.sh -c examples/guestbook-go/redis-master-service.json create services
ID Labels Selector Port
---------- ---------- ---------- ----------
redis-master name=redis,role=master 6379
```
This will cause all pods to see the redis master apparently running on localhost:6379.
Once created, the service proxy on each minion is configured to set up a proxy on the specified port (in this case port 6379).
### Step Three: Turn up the replicated slave pods.
Although the redis master is a single pod, the redis read slaves are a 'replicated' pod. In Kubernetes, a replication controller is responsible for managing multiple instances of a replicated pod.
Use the file `examples/guestbook-go/redis-slave-controller.json`
to create the replication controller by running:
```shell
$ cluster/kubecfg.sh -c examples/guestbook-go/redis-slave-controller.json create replicationControllers
ID Image(s) Selector Replicas
---------- ---------- ---------- ----------
redis-slave-controller gurpartap/redis name=redis,role=slave 2
```
The redis slave configures itself by looking for the Kubernetes service environment variables in the container environment. In particular, the redis slave is started with the following command:
```shell
redis-server --slaveof $SERVICE_HOST $REDIS_MASTER_SERVICE_PORT
```
Once that's up you can list the pods in the cluster, to verify that the master and slaves are running:
```shell
$ cluster/kubecfg.sh list pods
ID Image(s) Host Labels Status
---------- ---------- ---------- ---------- ----------
redis-master-pod gurpartap/redis kubernetes-minion-3.c.briandpe-api.internal name=redis,role=master Running
4d65822107fcfd52 gurpartap/redis kubernetes-minion-3.c.briandpe-api.internal name=redis,role=slave,replicationController=redis-slave-controller Running
78629a0f5f3f164f gurpartap/redis kubernetes-minion-4.c.briandpe-api.internal name=redis,role=slave,replicationController=redis-slave-controller Running
```
You will see a single redis master pod and two redis slave pods.
### Step Four: Create the redis slave service.
Just like the master, we want to have a service to proxy connections to the read slaves. In this case, in addition to discovery, the slave service provides transparent load balancing to clients. The service specification for the slaves is in `examples/guestbook-go/redis-slave-service.json`
This time the selector for the service is `name=redis,role=slave`, because that identifies the pods running redis slaves. It may also be helpful to set labels on your service itself--as we've done here--to make it easy to locate them with the `kubecfg -l "label=value" list services` command.
Now that you have created the service specification, create it in your cluster with the `kubecfg` CLI:
```shell
$ cluster/kubecfg.sh -c examples/guestbook-go/redis-slave-service.json create services
ID Labels Selector Port
---------- ---------- ---------- ----------
redis-slave name=redis-slave name=redis,role=slave 6379
```
### Step Five: Create the guestbook pod.
This is a simple Go net/http ([negroni](https://github.com/codegangsta/negroni) based) server that is configured to talk to either the slave or master services depending on whether the request is a read or a write. It exposes a simple JSON interface, and serves a jQuery-Ajax based UX. Like the redis read slaves it is a replicated service instantiated by a replication controller.
The pod is described in the file `examples/guestbook-go/guestbook-controller.json`:
Using this file, you can turn up your guestbook with:
```shell
$ cluster/kubecfg.sh -c examples/guestbook-go/guestbook-controller.json create replicationControllers
ID Image(s) Selector Replicas
---------- ---------- ---------- ----------
guestbook-controller gurpartap/redis name=guestbook 3
```
Once that's up (it may take ten to thirty seconds to create the pods) you can list the pods in the cluster, to verify that the master, slaves and guestbook frontends are running:
```shell
$ cluster/kubecfg.sh list pods
ID Image(s) Host Labels Status
---------- ---------- ---------- ---------- ----------
redis-master-pod gurpartap/redis kubernetes-minion-3.c.briandpe-api.internal name=redis,role=master Running
4d65822107fcfd52 gurpartap/redis kubernetes-minion-3.c.briandpe-api.internal name=redis,role=slave,replicationController=redis-slave-controller Running
380704bb7b4d7c03 kubernetes/guestbook kubernetes-minion-3.c.briandpe-api.internal name=guestbook,replicationController=guestbook-controller Running
55104dc76695721d kubernetes/guestbook kubernetes-minion-2.c.briandpe-api.internal name=guestbook,replicationController=guestbook-controller Running
365a858149c6e2d1 kubernetes/guestbook kubernetes-minion-1.c.briandpe-api.internal name=guestbook,replicationController=guestbook-controller Running
78629a0f5f3f164f gurpartap/redis kubernetes-minion-4.c.briandpe-api.internal name=redis,role=slave,replicationController=redis-slave-controller Running
```
You will see a single redis master pod, two redis slaves, and three guestbook pods.
To play with the service itself, find the name of a guestbook, grab the external IP of that host from the [Google Cloud Console][cloud-console] or the `gcutil` tool, and visit `http://<host-ip>:3000`.
```shell
$ gcutil listinstances
```
You may need to open the firewall for port 3000 using the [console][cloud-console] or the `gcutil` tool. The following command will allow traffic from any source to instances tagged `kubernetes-minion`:
```shell
$ gcutil addfirewall --allowed=tcp:3000 --target_tags=kubernetes-minion kubernetes-minion-3000
```
If you are running Kubernetes locally, you can just visit http://localhost:3000
For details about limiting traffic to specific sources, see the [gcutil documentation][gcutil-docs]
[cloud-console]: https://console.developer.google.com
[gcutil-docs]: https://developers.google.com/compute/docs/gcutil/reference/firewall#addfirewall
### Step Six: Cleanup
To turn down a Kubernetes cluster:
```shell
$ cluster/kube-down.sh
```

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FROM google/golang:latest
RUN mkdir -p /gopath/src/github.com/GoogleCloudPlatform/ && cd /gopath/src/github.com/GoogleCloudPlatform/ && \
git clone http://github.com/GoogleCloudPlatform/kubernetes && \
cd /gopath/src/github.com/GoogleCloudPlatform/kubernetes/examples/guestbook-go/src/ && \
go get && go build -o ../bin/guestbook && \
cp ./guestbook/Dockerfile /gopath/src/github.com/GoogleCloudPlatform/kubernetes/examples/guestbook-go/
CMD docker build --rm --force-rm -t kubernetes/guestbook /gopath/src/github.com/GoogleCloudPlatform/kubernetes/examples/guestbook-go/

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## Building and releasing Guestbook Image
Guestbook build process employs the usage of docker-in-docker to build an image within another. This requires that the build image has access to the `docker` program's binary, which defaults to the docker available on your host machine. In the case of boot2docker, `DOCKER_BIN` must be set to the binary's location in the boot2docker's vm.
Releasing the image requires that you have access to the docker registry user account which will host the image.
To build and release the guestbook image:
cd examples/guestbook-go/src
./script/release.sh
If you're using boot2docker, specify the `DOCKER_BIN` environment variable
DOCKER_BIN="$(boot2docker ssh which docker)" ./script/release.sh
#### Step by step
If you may want to, you can build and push the image step by step.
###### Start fresh before building
./script/clean.sh 2> /dev/null
###### Build
Builds a docker image that builds the app and packages it into a minimal docker image
./script/build.sh
If you're using boot2docker, specify the `DOCKER_BIN` environment variable
DOCKER_BIN="$(boot2docker ssh which docker)" ./script/build.sh
###### Push
Accepts an optional tag (defaults to "latest")
./script/push.sh [TAG]
###### Clean up
./script/clean.sh

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FROM busybox:ubuntu-14.04
ADD ./bin/guestbook /app/guestbook
ADD ./src/public/index.html /app/public/index.html
ADD ./src/public/script.js /app/public/script.js
ADD ./src/public/style.css /app/public/style.css
WORKDIR /app
CMD ["./guestbook"]
EXPOSE 3000

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/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"encoding/json"
"net/http"
"os"
"strings"
"github.com/codegangsta/negroni"
"github.com/gorilla/mux"
"github.com/xyproto/simpleredis"
)
var pool *simpleredis.ConnectionPool
func ListRangeHandler(rw http.ResponseWriter, req *http.Request) {
key := mux.Vars(req)["key"]
list := simpleredis.NewList(pool, key)
members := HandleError(list.GetAll()).([]string)
membersJSON := HandleError(json.MarshalIndent(members, "", " ")).([]byte)
rw.Write(membersJSON)
}
func ListPushHandler(rw http.ResponseWriter, req *http.Request) {
key := mux.Vars(req)["key"]
value := mux.Vars(req)["value"]
list := simpleredis.NewList(pool, key)
HandleError(nil, list.Add(value))
ListRangeHandler(rw, req)
}
func InfoHandler(rw http.ResponseWriter, req *http.Request) {
info := HandleError(pool.Get(0).Do("INFO")).([]byte)
rw.Write(info)
}
func EnvHandler(rw http.ResponseWriter, req *http.Request) {
environment := make(map[string]string)
for _, item := range os.Environ() {
splits := strings.Split(item, "=")
key := splits[0]
val := strings.Join(splits[1:], "=")
environment[key] = val
}
envJSON := HandleError(json.MarshalIndent(environment, "", " ")).([]byte)
rw.Write(envJSON)
}
func HandleError(result interface{}, err error) (r interface{}) {
if err != nil {
panic(err)
}
return result
}
func main() {
pool = simpleredis.NewConnectionPoolHost(os.Getenv("SERVICE_HOST") + ":" + os.Getenv("REDIS_MASTER_SERVICE_PORT"))
defer pool.Close()
r := mux.NewRouter()
r.Path("/lrange/{key}").Methods("GET").HandlerFunc(ListRangeHandler)
r.Path("/rpush/{key}/{value}").Methods("GET").HandlerFunc(ListPushHandler)
r.Path("/info").Methods("GET").HandlerFunc(InfoHandler)
r.Path("/env").Methods("GET").HandlerFunc(EnvHandler)
n := negroni.Classic()
n.UseHandler(r)
n.Run(":3000")
}

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<!DOCTYPE html>
<html lang="en">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<meta charset="utf-8">
<meta content="width=device-width" name="viewport">
<link href="/style.css" rel="stylesheet">
<title>Guestbook</title>
</head>
<body>
<div id="header">
<h1>Guestbook</h1>
</div>
<div id="guestbook-entries">
<p>Waiting for database connection...</p>
</div>
<div>
<form id="guestbook-form">
<input autocomplete="off" id="guestbook-entry-content" type="text">
<a href="#" id="guestbook-submit">Submit</a>
</form>
</div>
<div>
<p><h2 id="guestbook-host-address"></h2></p>
<p><a href="/env">/env</a>
<a href="/info">/info</a></p>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="/script.js"></script>
</body>
</html>

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$(document).ready(function() {
var headerTitleElement = $("#header h1");
var entriesElement = $("#guestbook-entries");
var formElement = $("#guestbook-form");
var submitElement = $("#guestbook-submit");
var entryContentElement = $("#guestbook-entry-content");
var hostAddressElement = $("#guestbook-host-address");
var appendGuestbookEntries = function(data) {
entriesElement.empty();
$.each(data, function(key, val) {
entriesElement.append("<p>" + val + "</p>");
});
}
var handleSubmission = function(e) {
e.preventDefault();
var entryValue = entryContentElement.val()
if (entryValue.length > 0) {
entriesElement.append("<p>...</p>");
$.getJSON("rpush/guestbook/" + entryValue, appendGuestbookEntries);
}
return false;
}
// colors = purple, blue, red, green, yellow
var colors = ["#549", "#18d", "#d31", "#2a4", "#db1"];
var randomColor = colors[Math.floor(5 * Math.random())];
(function setElementsColor(color) {
headerTitleElement.css("color", color);
entryContentElement.css("box-shadow", "inset 0 0 0 2px " + color);
submitElement.css("background-color", color);
})(randomColor);
submitElement.click(handleSubmission);
formElement.submit(handleSubmission);
hostAddressElement.append(document.URL);
// Poll every second.
(function fetchGuestbook() {
$.getJSON("lrange/guestbook").done(appendGuestbookEntries).always(
function() {
setTimeout(fetchGuestbook, 1000);
});
})();
});

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body, input {
color: #123;
font-family: "Gill Sans", sans-serif;
}
div {
overflow: hidden;
padding: 1em 0;
position: relative;
text-align: center;
}
h1, h2, p, input, a {
font-weight: 300;
margin: 0;
}
h1 {
color: #BDB76B;
font-size: 3.5em;
}
h2 {
color: #999;
}
form {
margin: 0 auto;
max-width: 50em;
text-align: center;
}
input {
border: 0;
border-radius: 1000px;
box-shadow: inset 0 0 0 2px #BDB76B;
display: inline;
font-size: 1.5em;
margin-bottom: 1em;
outline: none;
padding: .5em 5%;
width: 55%;
}
form a {
background: #BDB76B;
border: 0;
border-radius: 1000px;
color: #FFF;
font-size: 1.25em;
font-weight: 400;
padding: .75em 2em;
text-decoration: none;
text-transform: uppercase;
white-space: normal;
}
p {
font-size: 1.5em;
line-height: 1.5;
}

35
examples/guestbook-go/_src/script/build.sh Executable file
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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Usage: ./script/build.sh
set -o errexit
set -o nounset
set -o pipefail
if [[ "${DOCKER_BIN+set}" == "set" ]]; then
echo "Using DOCKER_BIN=\"${DOCKER_BIN}\" from the environment."
elif DOCKER_BIN=$(which docker); then
echo "Setting DOCKER_BIN=\"${DOCKER_BIN}\" from host machine."
else
echo "Could not find a working docker binary and none passed in DOCKER_BIN." >&2
exit 1
fi
docker build --rm --force-rm -t kubernetes/guestbook-build .
docker run --rm -v "${DOCKER_BIN}:/usr/local/bin/docker" \
-v "/var/run/docker.sock:/var/run/docker.sock" \
-ti --name guestbook-build kubernetes/guestbook-build

25
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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Usage: ./script/clean.sh
set -o errexit
set -o nounset
set -o pipefail
docker rm -f guestbook-build 2> /dev/null || true
docker rmi -f kubernetes/guestbook-build || true
docker rmi -f kubernetes/guestbook || true

24
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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Usage: ./script/push.sh [TAG]
set -o errexit
set -o nounset
set -o pipefail
guestbook_version=${1:-latest}
docker push "kubernetes/guestbook:${guestbook_version}"

40
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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Usage: ./script/release.sh [TAG]
set -o errexit
set -o nounset
set -o pipefail
base_dir=$(dirname "$0")
base_dir=$(cd "${base_dir}" && pwd)
guestbook_version=${1:-latest}
echo " ---> Cleaning up before building..."
"${base_dir}/clean.sh" 2> /dev/null
echo " ---> Building..."
"${base_dir}/build.sh"
echo " ---> Pushing kubernetes/guestbook:${guestbook_version}..."
"${base_dir}/push.sh" "${guestbook_version}"
echo " ---> Cleaning up..."
"${base_dir}/clean.sh"
echo " ---> Done."

6
examples/guestbook-go/guestbook-controller.json
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@ -11,9 +11,9 @@
"version": "v1beta1",
"id": "guestbook-controller",
"containers": [{
"image": "gurpartap/guestbook-example",
"name": "php-redis",
"ports": [{ "containerPort": 3000, "hostPort": 3000 }]
"image": "kubernetes/guestbook",
"name": "guestbook",
"ports": [{ "name": "http-server", "containerPort": 3000 }]
}],
}
},

1
examples/guestbook-go/guestbook-service.json
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@ -3,5 +3,6 @@
"kind": "Service",
"id": "guestbook",
"port": 3000,
"containerPort": "http-server",
"selector": { "name": "guestbook" }
}

6
examples/guestbook-go/redis-master-pod.json
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@ -7,11 +7,11 @@
"version": "v1beta1",
"id": "redis-master-pod",
"containers": [{
"name": "master",
"name": "redis-master",
"image": "gurpartap/redis",
"ports": [{ "containerPort": 6379, "hostPort": 6379 }]
"ports": [{ "name": "redis-server", "containerPort": 6379 }]
}]
}
},
"labels": { "name": "redis-master" }
"labels": { "name": "redis", "role": "master" }
}

5
examples/guestbook-go/redis-master-service.json
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@ -1,7 +1,8 @@
{
"apiVersion": "v1beta1",
"kind": "Service",
"id": "redis-master-service",
"id": "redis-master",
"port": 6379,
"selector": { "name": "redis-master" }
"containerPort": "redis-server",
"selector": { "name": "redis", "role": "master" }
}

10
examples/guestbook-go/redis-slave-controller.json
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@ -4,7 +4,7 @@
"id": "redis-slave-controller",
"desiredState": {
"replicas": 2,
"replicaSelector": { "name": "redis-slave" },
"replicaSelector": { "name": "redis", "role": "slave" },
"podTemplate": {
"desiredState": {
"manifest": {
@ -13,13 +13,13 @@
"containers": [{
"name": "redis-slave",
"image": "gurpartap/redis",
"command": ["redis-server", "/etc/redis/redis.conf", "--slaveof", "$SERVICE_HOST", "$REDIS_MASTER_SERVICE_SERVICE_PORT"],
"ports": [{ "containerPort": 6379, "hostPort": 6379 }]
"command": ["sh", "-c", "redis-server /etc/redis/redis.conf --slaveof $SERVICE_HOST $REDIS_MASTER_SERVICE_PORT"],
"ports": [{ "name": "redis-server", "containerPort": 6379 }]
}]
}
},
"labels": { "name": "redis-slave" }
"labels": { "name": "redis", "role": "slave" }
}
},
"labels": { "name": "redis-slave" }
"labels": { "name": "redis", "role": "slave" }
}

7
examples/guestbook-go/redis-slave-service.json
View File

@ -1,8 +1,9 @@
{
"apiVersion": "v1beta1",
"kind": "Service",
"id": "redis-slave-service",
"id": "redis-slave",
"port": 6379,
"labels": { "name": "redis-slave" },
"selector": { "name": "redis-slave" }
"containerPort": "redis-server",
"labels": { "name": "redis", "role": "slave" },
"selector": { "name": "redis", "role": "slave" }
}

6
examples/guestbook-go/src/Dockerfile
View File

@ -1,6 +0,0 @@
FROM google/golang:latest
RUN go get github.com/Gurpartap/guestbook-example && \
cp /gopath/src/github.com/Gurpartap/guestbook-example/busybox-image/Dockerfile /gopath
CMD docker build --rm --force-rm -t gurpartap/guestbook-example /gopath

10
examples/guestbook-go/src/busybox-image/Dockerfile
View File

@ -1,10 +0,0 @@
FROM busybox:ubuntu-14.04
ADD ./bin/guestbook-example /app/guestbook-example
ADD ./src/github.com/Gurpartap/guestbook-example/public/index.html /app/public/index.html
ADD ./src/github.com/Gurpartap/guestbook-example/public/script.js /app/public/script.js
ADD ./src/github.com/Gurpartap/guestbook-example/public/style.css /app/public/style.css
WORKDIR /app
CMD ["./guestbook-example"]
EXPOSE 3000

7
examples/guestbook-go/src/busybox-image/script/build.sh
View File

@ -1,7 +0,0 @@
#!/bin/sh
# Usage: ./build.sh
docker build --rm --force-rm -t gurpartap/guestbook-example-build .
docker run --rm -v /var/run/docker.sock:/var/run/docker.sock \
-v $(which docker):/usr/local/bin/docker \
-ti --name guestbook-example-build gurpartap/guestbook-example-build

6
examples/guestbook-go/src/busybox-image/script/clean.sh
View File

@ -1,6 +0,0 @@
#!/bin/sh
# Usage: ./clean.sh
docker rm -f guestbook-example-build 2> /dev/null
docker rmi -f gurpartap/guestbook-example-build
docker rmi -f gurpartap/guestbook-example

4
examples/guestbook-go/src/busybox-image/script/push.sh
View File

@ -1,4 +0,0 @@
#!/bin/sh
# Usage: ./push.sh [TAG]
docker push gurpartap/guestbook-example:${1:-latest}

17
examples/guestbook-go/src/busybox-image/script/release.sh
View File

@ -1,17 +0,0 @@
#!/bin/bash
# Usage: ./release.sh [TAG]
set +e
DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
echo " ---> Building..."
sh $DIR/build.sh
echo " ---> Pushing gurpartap/guestbook-example:${1:-latest}..."
sh $DIR/push.sh $1
echo " ---> Cleaning up..."
sh $DIR/clean.sh
echo " ---> Done."

104
examples/guestbook-go/src/main.go
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@ -1,104 +0,0 @@
package main
import (
"encoding/json"
"net/http"
"os"
"strings"
"github.com/codegangsta/negroni"
"github.com/gorilla/mux"
"github.com/xyproto/simpleredis"
)
var pool *simpleredis.ConnectionPool
func ListRangeHandler(rw http.ResponseWriter, req *http.Request) {
members, err := simpleredis.NewList(pool, mux.Vars(req)["key"]).GetAll()
if err != nil {
panic(err)
}
membersJSON, err := json.MarshalIndent(members, "", " ")
if err != nil {
panic(err)
}
rw.WriteHeader(200)
rw.Header().Set("Content-Type", "application/json")
rw.Write([]byte(membersJSON))
}
func ListPushHandler(rw http.ResponseWriter, req *http.Request) {
set := simpleredis.NewList(pool, mux.Vars(req)["key"])
err := set.Add(mux.Vars(req)["value"])
if err != nil {
panic(err)
}
members, err := set.GetAll()
if err != nil {
panic(err)
}
membersJSON, err := json.MarshalIndent(members, "", " ")
if err != nil {
panic(err)
}
rw.WriteHeader(200)
rw.Header().Set("Content-Type", "application/json")
rw.Write([]byte(membersJSON))
}
func InfoHandler(rw http.ResponseWriter, req *http.Request) {
info, err := pool.Get(0).Do("INFO")
if err != nil {
panic(err)
}
infoString := string(info.([]uint8))
rw.WriteHeader(200)
rw.Write([]byte(infoString))
}
func EnvHandler(rw http.ResponseWriter, req *http.Request) {
getenvironment := func(data []string, getkeyval func(item string) (key, val string)) map[string]string {
items := make(map[string]string)
for _, item := range data {
key, val := getkeyval(item)
items[key] = val
}
return items
}
environment := getenvironment(os.Environ(), func(item string) (key, val string) {
splits := strings.Split(item, "=")
key = splits[0]
val = strings.Join(splits[1:], "=")
return
})
envJSON, err := json.MarshalIndent(environment, "", " ")
if err != nil {
panic(err)
}
rw.WriteHeader(200)
rw.Write([]byte(envJSON))
}
func main() {
pool = simpleredis.NewConnectionPoolHost(os.Getenv("SERVICE_HOST") + ":" + os.Getenv("REDIS_MASTER_SERVICE_SERVICE_PORT"))
defer pool.Close()
r := mux.NewRouter()
r.Path("/lrange/{key}").Methods("GET").HandlerFunc(ListRangeHandler)
r.Path("/rpush/{key}/{value}").Methods("GET").HandlerFunc(ListPushHandler)
r.Path("/info").Methods("GET").HandlerFunc(InfoHandler)
r.Path("/env").Methods("GET").HandlerFunc(EnvHandler)
n := negroni.Classic()
n.UseHandler(r)
n.Run(":3000")
}

39
examples/guestbook-go/src/public/index.html
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@ -1,39 +0,0 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="http://yui.yahooapis.com/pure/0.5.0/pure-min.css">
<link rel="stylesheet" href="/style.css">
<title>Guestbook</title>
</head>
<body>
<div class="section" id="header">
<div class="color-overlay"></div>
<div class="container">
<h1>Guestbook</h1>
<h2><script type="text/javascript">document.write(document.URL);</script></h2>
</div>
</div>
<div class="section" id="content">
<div class="container">
<div class="section-text-container" id="guestbook-entries">
<p>Waiting for database connection...</p>
</div>
</div>
</div>
<div class="section" id="content">
<div class="container">
<div class="section-text-container">
<form>
<input id="guestbook-entry-content" required="true" autocomplete="off" type="text" placeholder="" value="">
<a class="pure-button default-button" id="guestbook-submit" href="#">Submit</a>
</form>
</div>
</div>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="/script.js"></script>
</body>
</html>

34
examples/guestbook-go/src/public/script.js
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@ -1,34 +0,0 @@
$( document ).ready(function() {
appendGuestbookEntries = function( data ) {
$( "#guestbook-entries" ).empty();
$.each( data, function( key, val ) {
$( "#guestbook-entries" ).append( "<p>" + val + "</p>" );
});
}
handleSubmission = function() {
value = $( "#guestbook-entry-content" ).val()
if (value.length > 0) {
$( "#guestbook-entries" ).append( "<p>...</p>" );
$.getJSON( "rpush/guestbook/" + value, appendGuestbookEntries);
}
return false;
}
// Event handlers.
$( "#guestbook-submit" ).click(handleSubmission);
$( "#guestbook-entry-content" ).keypress(function (e) {
if (e.which == 13) {
return handleSubmission();
}
});
// Poll every second.
(function fetchGuestbook(){
$.getJSON("lrange/guestbook").done(appendGuestbookEntries).always(function() { setTimeout(fetchGuestbook, 1000); });
})();
});

107
examples/guestbook-go/src/public/style.css
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@ -1,107 +0,0 @@
html, body {
background: #EEE; }
html, button, input, select, textarea,
.pure-g [class*="pure-u"],
.pure-g-r [class*="pure-u"] {
font-family: "Helvetica", sans-serif;
color: #585A5C;
line-height: 1.4;
position: relative; }
h1, h2, p, a, .pure-button {
margin: 0;
color: #585A5C;
font-weight: 400; }
h1 strong, h2 strong, h3 strong, p strong, li strong, a strong, .pure-button strong {
font-weight: 700; }
h1 {
font-size: 5em;
font-weight: 300;
color: #585A5C; }
h2 {
font-size: 2.25em;
font-weight: 300;
color: #585A5C; }
p {
font-size: 1.2em;
line-height: 1.7; }
input {
font-size: 1.125em;
outline: none; }
.default-button {
position: relative;
font-weight: 400;
padding: 0.75em 2em;
white-space: normal;
background: #1699e3;
border-radius: 1000px;
font-size: 1.25em;
color: #FFF;
text-transform: uppercase; }
.default-button strong {
font-weight: 700; }
.section {
position: relative;
zoom: 1;
width: 100%;
overflow: hidden; }
.container {
position: relative;
overflow: hidden;
margin: 0 auto;
padding: 0 1em;
max-width: 64em;
text-align: center; }
.section-text-container {
max-width: 48em;
margin: 0 auto; }
.color-overlay {
position: absolute;
width: 100%;
height: 100%;
top: 0;
left: 0;
opacity: 0.9;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=" 90 ")";
filter: alpha(opacity=90);
zoom: 1; }
#header {
padding: 2em 0 0 0; }
#header h1, #header h2, #header a {
color: #585A5C; }
#header .color-overlay {
background: #eee; }
#header .container {
overflow: visible; }
#content {
background: #eee;
padding: 1em 0; }
#content form {
text-align: center;
margin: 3em auto 0 auto;
max-width: 20em; }
#content input {
font-size: 1.25em;
display: block;
width: 80%;
padding: 0.75em 10%;
margin-bottom: 1em;
border-radius: 1000px;
text-align: center;
border: 0;
box-shadow: inset 0 0 0 2px #ccc;
-webkit-appearance: none; }
#content button {
width: 100%; }