Cat/City of the Day

PHP web application using JQuery Mobile that publishes a list of ordered items. Each item has an image and trivia.

Item lists are organised as themes. The application looks for an environment variable known as SELECTOR to set the theme. The default theme is SELECTOR="pets" using images supplied by my work colleagues. Other themes include "cats" and "cities". By default, item image content is sourced from the local data directory. If the environment variable SERVICE is set, the application will look for REST service at the IP address for item meta data. MySQL database meta data is also supported, look at include/selector.php for necessary settings.

Website

A sample running application is hosted on OpenShift Online V2.

http://www.cotd.net.au

Usage

The application is used to support the OpenShift MiniLabs series. Look here for example usage of this application.

http://StefanoPicozzi.blog

Configuration

Lists can be customed by editing the include/selector.php to point to set the theme of interest. Edit the data/$theme.php file populate the data for that $theme. Add images to the data/images/$theme subdirectory with names matching list items.

Logging

Whenever the user rates an item, an entry is written to the php log. These entries can be filtered and then used to test hypotheses regarding user engagement. An example entry is as follows:

[Sun Sep 25 09:14:40.037909 2016] [:error] [pid 15] [client 172.17.0.1:46572] <COTD> { "user" : "e299ra835usa88pp19sr25ipg6", items" : [ {"adelaide" : "1"}, {"canberra" : "3"}, ] , "client_ip" : "172.17.0.1",  "sydney_time" : "2016:09:25 19:14:40",  } </COTD>, referer: http://localhost:8080/item.php?nextpage=canberra

AB Deployment Example

To demonstrate AB deployments try the following:

Setup Environment

Fork this Git repo Visit https://www.openshift.org/vm/ to create an instance of OpenShift

Create Project

Visit the Console at https://10.2.2.2:8443/console/ using credentials user/user Create a project called cotd with description "Cat of the Day"

oc new-project cotd --display-name="City of the day" --description='City of the day'

Create A Application

Visit your Git repo and change the data/selector.php to point to "cats" Create a php application called cotd1 and point it to this Git repo Verify that the application using http://cotd1-cotd.apps.10.2.2.2.xip.io

oc new-app openshift/php:5.6~https://github.com/eformat/cotd.git#master --name=master

Create B Application

Visit your Git repo and change the data/selector.php to point to "cities" Create a php application called cotd2 and point it to this Git repo Verify that the application using http://cotd2-cotd.apps.10.2.2.2.xip.io

oc new-app openshift/php:5.6~https://github.com/eformat/cotd.git#feature --name=feature

Create AB Route Target

Switch to the Applications > Routes tab in the Console Create a route ab pointing to http://ab-cotd.apps.10.2.2.2.xip.io

oc expose service master --hostname=cotd.192.168.137.2.xip.io --name=cotd

Change route policy to round robin

By default the HA proxy router will configure your route for least connection. To work correctly with weights, set an annotation so that round robin balancing is used

oc annotate route/cotd haproxy.router.openshift.io/balance=roundrobin

Create AB Routing Rule

From a terminal window issue an $ oc login https://10.2.2.2:8443 with credentials user/user Set the project to cotd using $ oc project cotd Create a AB route using the web UI - broswe to cotd Route RouteSplit traffic across multiple services Verify the AB 50/50 setting in the cotd project

oc set route-backends routes/cotd master=50 feature=50

You can also incrementally adjust from client

oc set route-backends routes/cotd --adjust feature=+10%

Verify AB Behavior

Launch a a different browser and set cookies preferences to "never allow" Open http://ab-cotd.apps.10.2.2.2.xip.io Refresh and note changes between cats and cities versions

Running using Docker Toolbox

$ docker pull spicozzi/cotd
$ docker run -d -i -p 8080:80 spicozzi/cotd
Browser http://localhost:8080

Running on Openshift3

oc new-project cotd --display-name="City of the day" --description='City of the day'
oc new-app openshift/php:5.6~https://github.com/<repo>/cotd.git
oc expose svc cotd

Developing on the fly in Openshift3

Edit the buildconfig:

-- change from Git to binary
source:
  type: Git
  git:
    uri: 'https://github.com/eformat/cotd.git'
  secrets: null

-- to this
source:
  type: Binary

-- then build with
oc start-build --from-dir=. cotd

You may also wish to enable live reload for php image (don't do this in prod)

oc set env dc/cotd OPCACHE_REVALIDATE_FREQ=0

Parse the pods running statistics

For now:

./parseCotdLogs.pl $(oc get pods | grep cotd | grep Running | awk '{print $1}')