https://blogs.technet.microsoft.com/canitpro/2013/08/19/step-by-step-creating-a-sql-server-2012-alwayson-availability-group/
https://blogs.msdn.microsoft.com/srinivas-v-v/2013/06/24/setting-up-always-on-availability-group-on-sql-server-2012/
https://www.brentozar.com/archive/2011/07/how-set-up-sql-server-denali-availability-groups/
https://blogs.technet.microsoft.com/meamcs/2013/02/15/sql-2012-failover-cluster-build-step-by-step-part-1-installing-sql-2012/
https://theadminsguide.net/2014/05/20/sql-server-2012-failover-cluster-installation-step-by-step-guide-part-1/
https://theadminsguide.net/2014/05/22/sql-server-2012-failover-cluster-installation-step-by-step-guide-part-2/