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nfiguration manager in the navigation pane select sql server services in the list of services right click sql server mssqlserver and select properties under log on as change the account as follows account name domain sql_server where domain is the netbios name of your active directory domain password enter the password you chose previously click ok when prompted to restart sql server select yes sql server now runs under a domain user account warning make sure you ve completed the previous configuration steps on both vm instances otherwise setting up the always on availability group will fail create file shares create two file shares on the vm instance witness so that it can store sql server backups and act as a file share witness connect to witness by using remote desktop sign in with your domain user account right click the start button or press win x and click windows powershell admin confirm the elevation prompt by clicking yes create a witness file share and grant yourself and the two cluster nodes access to the file share new item c qwitness type directory icacls c qwitness grant node 1 oi ci m icacls c qwitness grant node 2 oi ci m new smbshare name qwitness path c qwitness description sql file share witness fullaccess env username node 1 node 2 create another file share to store backups and grant sql server full access new item c backup type directory new smbshare name backup path c backup description sql backup fullaccess env userdomain sql_server create the failover cluster to create the failover cluster use the following steps return to the remote desktop session on node 1 right click the start button or press win x and click windows powershell admin confirm the elevation prompt by clicking yes create a new cluster new cluster name sql cluster node node 1 node 2 nostorage staticaddress cluster_ip replace cluster_ip with the cluster ip address that you created earlier note when computer objects are created outside the container computers in an ou the permission create computer objects must be delegated to the cluster s computer account in the ou return to the powershell session on witness and grant the virtual computer object of the cluster permission to access the file share icacls c qwitness grant sql cluster oi ci m grant smbshareaccess name qwitness accountname sql cluster accessright full force return to the powershell session on node 1 and configure the cluster to use the file share on witness as a cluster quorum set clusterquorum filesharewitness witness qwitness verify that the cluster was created successfully test cluster you might see the following warnings that you can safely ignore warning system configuration validate all drivers signed the test reported some warnings warning network validate network communication the test reported some warnings warning test result hadunselectedtests clusterconditionallyapproved testing has completed for the tests you selected you should review the warnings in the report a cluster solution is supported by microsoft only if you run all cluster validation tests and all tests succeed with or without warnings you can also launch the failover cluster manager mmc snap in to review the cluster s health by running cluadmin msc if you re using managed ad add the computer account used by the windows cluster to the cloud service domain join accounts group so that it can join computers to the domain add adgroupmember identity cloud service domain join accounts members sql cluster enable always on availability groups on both nodes enable sqlalwayson serverinstance node 1 force enable sqlalwayson serverinstance node 2 force creating an availability group you now create a sample database bookshelf include it in a new availability group named bookshelf ag and configure high availability creating a database create a new database for the purpose of this tutorial the database doesn t need to contain any data return to the remote desktop session on node 1 open the sql server management studio in the connect to server dialog verify the server name is set to node 1 and select connect in the menu select file new query with current connection paste the following sql script into the editor create a sample database create database bookshelf on primary name bookshelf filename d data bookshelf mdf size 256mb maxsize unlimited filegrowth 256mb log on name bookshelf_log filename d logs bookshelf ldf size 256mb maxsize unlimited filegrowth 256mb go use bookshelf set ansi_nulls on set quoted_identifier on go create sample table create table dbo books id bigint identity 1 1 not null title nvarchar max not null author nvarchar max null publisheddate datetime null imageurl nvarchar max null description nvarchar max null createdbyid nvarchar max null constraint pk_dbo books primary key clustered id asc with pad_index off statistics_norecompute off ignore_dup_key off allow_row_locks on allow_page_locks on on primary on primary textimage_on primary go create a backup exec dbo sp_changedbowner loginame sa map false alter database bookshelf set recovery full go backup database bookshelf to disk witness backup bookshelf bak with init go the script creates a new database with a single table and performs an initial backup to witness select execute to run the sql script configure high availability you can now configure high availability for the availability group using either t sql or sql server management studio using t sql to configure high availability for the availability group using t sql use the following steps connect to node 1 and then execute the following script to create the bookshelf ag availability group create login net_domain sql_server from windows go use bookshelf create user net_domain sql_server for login net_domain sql_server go use master create endpoint bookshelf_endpoint state started as tcp listener_port 5022 for database_mirroring role all go grant connect on endpoint bookshelf_endpoint to net_domain sql_server go note in the net_domain sql_server login and user net_domain is the netbios name of your active directory domain connect to node 2 and execute the following script create login net_domain sql_server from windows go create endpoint bookshelf_endpoint state started as tcp listener_port 5022 for database_mirroring role all go grant connect on endpoint bookshelf_endpoint to net_domain sql_server go note in the net_domain sql_server login and user net_domain is the netbios name of your active directory domain on node 1 and then execute the following script to create the bookshelf ag availability group use master go create availability group bookshelf ag with automated_backup_preference secondary cluster_type wsfc db_failover on for database bookshelf replica on n node 1 with endpoint_url tcp node 1 5022 availability_mode synchronous_commit failover_mode automatic backup_priority 50 seeding_mode automatic secondary_role allow_connections no n node 2 with endpoint_url tcp node 2 5022 availability_mode synchronous_commit failover_mode automatic backup_priority 50 seeding_mode automatic secondary_role allow_connections no go in the following script replace listener_ip with the ip address that you reserved earlier for the internal load balancer and execute it use master go alter availability group bookshelf ag add listener n bookshelf with ip n listener_ip n 255 255 255 0 port 1433 go connect to node 2 and then execute the following script to join the secondary replica to the availability group and enable automatic seeding use master go alter availability group bookshelf ag join alter availability group bookshelf ag grant create any database check the status of the availability group select from sys dm_hadr_availability_group_states go you should see synchronization_health_desc as healthy using sql server management studio to configure high availability for the availability group using sql server management studio use the following steps in the object explorer window right click always on high availability and then select new availability group wizard on the specify options page set the availability group name to bookshelf ag then select next on the select databases page select the bookshelf database then select next on the specify replicas page select the replicas tab select add replica in the connect to server dialog enter the server name node 2 and select connect the list of availability replicas now contains sql server instances node 1 and node 2 set the availability mode to synchronous commit for both instances set automatic failover to enabled for both instances select the listener tab select create an availability group listener enter the following settings listener dns name bookshelf port 1433 network mode static ip select add and enter the listener ip address listener_ip that you reserved earlier for the internal load balancer then select ok select next on the select data synchronization page select automatic seeding on the validation page verify that all checks are successful on the summary page select finish on the results page select close create internal load balancers and health checks the cluster ip represents a single endpoint for the windows failover cluster you use it for administrative purposes and managing cluster resources the cluster ip always points to the host or primary node of the cluster you deploy an internal load balancer that uses a health check that ensures that traffic is directed to the host node of the cluster as wsfc tooling requires multiple protocols to be available for forwarding icmp udp and tcp we recommend deploying an internal load balancer with multiple protocols that support all ports to deploy an internal load balancer use the following steps return to your existing cloud shell session create two unmanaged instance groups one per zone and add the two nodes to the groups region gcloud config get value compute region gcloud compute instance groups unmanaged create wsfc group 1 zone zone1 gcloud compute instance groups unmanaged add instances wsfc group 1 zone zone1 instances node 1 gcloud compute instance groups unmanaged create wsfc group 2 zone zone2 gcloud compute instance groups unmanaged add instances wsfc group 2 zone zone2 instances node 2 create health check for the cluster ip that the load balancer can use to determine which is the active node from the windows cluster perspective the default port which the compute engine guest agent responds to health checks is 59998 the health check provides the cluster ip address in the request and it expects 1 as a response returned from the active node gcloud compute health checks create tcp wsfc healthcheck request cluster_ip response 1 check interval 2s healthy threshold 2 unhealthy threshold 2 port 59998 timeout 1s create a backend service and add the two existing instance groups gcloud compute backend services create wsfc backend load balancing scheme internal region region health checks wsfc healthcheck protocol unspecified gcloud compute backend services add backend wsfc backend instance group wsfc group 1 instance group zone zone1 region region gcloud compute backend services add backend wsfc backend instance group wsfc group 2 instance group zone zone2 region region create the internal load balancer associated with the cluster ip gcloud compute forwarding rules create wsfc load balancing scheme internal address cluster_ip ports all network vpc_name subnet subnet_name region region ip protocol l3_default backend service wsfc backend to provide a single endpoint for sql server clients that want to connect to any database in your bookshelf availability group deploy a new internal load balancer dedicated to that availability group use the following steps create a health check for the availability group listener that the load balancer can use to determine which is the primary node in the bookshelf sql server availability group gcloud compute health checks create tcp wsfc bookshelf healthcheck request listener_ip response 1 check interval 2s healthy threshold 1 unhealthy threshold 2 port 59998 timeout 1s the health check uses the same compute engine guest agent port but it provides in its request the listener ip address of the bookshelf availability group create a new backend service and add the two instance groups gcloud compute backend services create wsfc bookshelf backend load balancing scheme internal region region health checks wsfc bookshelf healthcheck protocol unspecified gcloud compute backend services add backend wsfc bookshelf backend instance group wsfc group 1 instance group zone zone1 region region gcloud compute backend services add backend wsfc bookshelf backend instance group wsfc group 2 instance group zone zone2 region region create the internal load balancer associated with the sql server bookshelf ag availability group listener gcloud compute forwarding rules create wsfc bookshelf load balancing scheme internal address listener_ip ports all network vpc_name subnet subnet_name region region ip protocol l3_default backend service wsfc bookshelf backend you can now connect to sql server availability group listener by using the dns name bookshelf and its port defined in the bookshelf availability group listener the internal load balancer directs traffic to the primary node of the bookshelf availability group to create multiple availability groups on a single failover cluster you must use separate backend services and a separate load balancer with its own healthcheck per availability group each availability group might have different nodes designated as the primary and they might be different than the host node of the windows cluster for multiple availability groups you need the following a reserved static ip address for the availability group listener that the internal load balancer uses reserve one address for each availability group a separate health check rule for each availability group the request of the health check provides the static ip address of the availability group listener which is also the reserved ip address at the previous step the health check probes for response 1 returned by the gce agent all health checks use port 59998 a separate backend service for each availability group to which you add the existing two compute instance groups the backend service uses the health check defined at the previous step an internal load balancer for each availability group for the backend service created at the previous step the load balancer is associated with the availability group listener static ip address test the failover you are now ready to test if the failover works as expected return to the powershell session on witness run the following script while true conn new object system data sqlclient sqlconnection conn connectionstring server tcp bookshelf 1433 integrated security true initial catalog master conn open cmd new object system data sqlclient sqlcommand cmd connection conn cmd commandtext select serverproperty servername adapter new object system data s...