Merge pull request #72 from sarabadanie/master

Building a Highly-Available PostgreSQL Cluster on Azure

_data/authors.yml

@@ -68,3 +68,7 @@ scott_speights:
     email: scott.speights@haufe-lexware.com
     github: SSpeights
     twitter: ScottSpeights
+esmaeil_sarabadani:
+    name: Esmaeil Sarabadani
+    email: esmaeil.sarabadani@haufe-lexware.com
+    twitter: esmaeils

_posts/2016-08-30-PostgreSQL-Cluster-Azure.md

@@ -0,0 +1,31 @@
+---
+layout: post
+title: Building a Highly-Available PostgreSQL Cluster on Azure 
+subtitle:
+category: howto
+tags: [cto, cloud, automation]
+author: esmaeil_sarabadani
+author_email: esmaeil.sarabadani@haufe-lexware.com
+header-img: "images/bg-post.jpg"
+---
+
+The possibility to create a PostgreSQL cluster on your Azure subscription is now only few clicks away. The use of PostgreSQL database (a.k.a the most advanced open-source database) has increased in different software development projects in Haufe and setting it up in a cluster on Azure in an easy and convenient way (preferably as-a-Service) was always a wish for developers. 
+
+We would like to announce that with our new Azure template it is now possible to automate the creation of a highly-available PostgreSQL cluster on your Azure subscription. 
+It uses Ubuntu 14.04 LTS machines with 128 GB SSD data disks for high performance. A [Zookeeper] ensemble of three machines is used to orchestrate the behavior of the postgres cluster. For automated PostgreSQL server management and leader election the open source solution [Patroni] (developed by zalando) is used and installed side by side with PostgreSQL 9.5 on the machines. 
+
+To use this template simply click [here] and you will be redirected to the Azure login page where you can log in and provide values for the following parameters:
+
+ - ClusterName: The name of the cluster to create. Avoid spaces and special characters in this name
+ - InstanceCount: The number of postgreSQL servers to create. Minimum: 2, Maximum: 5
+ - AdminUsername: Name for user account with root privileges. Can be used to connect to the machines using ssh
+ - AdminPassword: Password for admin user account
+
+After deployment, you can connect to clusterName.regionName.cloudapp.azure.com on postgreSQL default port 5432 using username "admin" and the password you set as a parameter value in the template.
+In order to connect to the postgreSQL instances, use any ssh client on port 10110 for instance postgres0, 10111 for postgres1 and etc.
+
+We hope this brings some joy and of course convenience on your journey to cloud.
+
+   [Zookeeper]: <http://zookeeper.apache.org/>
+   [Patroni]: <https://github.com/zalando/patroni>
+   [here]: <https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Ftangibletransfer.blob.core.windows.net%2Fpublic%2Fpostgresha%2FPostgresHA.json>