FCI + Always On

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FCI + Always On

crcoracle

Right there with Babe

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December 16, 2017 at 5:23 am

#326938

Hi,
I want to setup a 3 nodes solutions. NODE_A, NODE_B and NODE_C are part of the same WSFC.
Node_A -> Contains the SQL Server Role, with the sql server clustered instance and its resources
Node_B-> SQL Server role can be failover to Node_B using WSFC.
Node_C-> This node contains another SQL server Instance , and is configured with AlwaysON AG as the target for the primary instances on nodes NODE_A and NODE_B
With that configuration , I can connect to SQL Server using the AlwaysOn Listener.
When I do a maual failover from primary Instance to the AlwaysOn Instance, I can connect to SQL Server using the AlwaysOn Listener.
When I do a manual failover from SQL Server Role from Node_a to Node_b, I can not connect to SQL Server using the AlwaysOn Listener.
Am I missing something?
Regards

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Super Cat SSCertifiable Points: 7332 More actions · Answer 1

Just to be clear NODE A and Node B are set up as an FCI with Node B being Passive.
Node C is the secondary replica of the Instance running on either NODE A or Node B.

The answer to your questions is YES.

If SQL SERVER Is either running on the Primary Node A or Node B. Then the listener can be used.
If the AG is failed over to NODE C. Then the LISTENER can still be used.

Super Cat SSCertifiable Points: 7332 More actions · Answer 2

The node operating as the (AG),PRIMARY will be the node that the LISTENER will connect to.

crcoracle Right there with Babe Points: 778 More actions · Answer 3

Super Cat - Monday, December 18, 2017 4:04 AM
The node operating as the (AG),PRIMARY will be the node that the LISTENER will connect to.

Super Cat - Monday, December 18, 2017 3:28 AM
Just to be clear NODE A and Node B are set up as an FCI with Node B being Passive.
Node C is the secondary replica of the Instance running on either NODE A or Node B.
The answer to your questions is YES.
If SQL SERVER Is either running on the Primary Node A or Node B. Then the listener can be used.
If the AG is failed over to NODE C. Then the LISTENER can still be used.

Ok, so something is wrong with my configuration because I can not connect through my listener when failover is performed manually from node_a to node_b

Here you can see my problem https://youtu.be/r5A5f5NtW1Y
In the minute 02:10 I move my FCI from node_a to node_b

Perry Whittle SSC Guru Points: 233821 More actions · Answer 4

crcoracle - Saturday, December 16, 2017 5:23 AM
When I do a manual failover from SQL Server Role from Node_a to Node_b, I can not connect to SQL Server using the AlwaysOn Listener.
Am I missing something?
Regards

What is the status of the listener IP and name resources in the cluster role, after this failover?

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"Ya can't make an omelette without breaking just a few eggs" 😉

Super Cat SSCertifiable Points: 7332 More actions · Answer 5

select * from sys.dm_hadr_availability_replica_cluster_states

I would expect to see Joined_FCI for NODE A and B in column Join State Desc
and
Joined_STANDALONE for NODE C

select * from sys.dm_tcp_listener_states

Does the Dashboard show any errors.?

Perry Whittle SSC Guru Points: 233821 More actions · Answer 6

crcoracle - Monday, December 18, 2017 4:53 AM
Super Cat - Monday, December 18, 2017 4:04 AM
The node operating as the (AG),PRIMARY will be the node that the LISTENER will connect to.
Super Cat - Monday, December 18, 2017 3:28 AM
Just to be clear NODE A and Node B are set up as an FCI with Node B being Passive.
Node C is the secondary replica of the Instance running on either NODE A or Node B.
The answer to your questions is YES.
If SQL SERVER Is either running on the Primary Node A or Node B. Then the listener can be used.
If the AG is failed over to NODE C. Then the LISTENER can still be used.
Ok, so something is wrong with my configuration because I can not connect through my listener when failover is performed manually from node_a to node_b
Here you can see my problem https://youtu.be/r5A5f5NtW1Y
In the minute 02:10 I move my FCI from node_a to node_b

Please review my stairway to AlwaysOn starting at the following link

http://www.sqlservercentral.com/stairway/112556/

-----------------------------------------------------------------------------------------------------------

"Ya can't make an omelette without breaking just a few eggs" 😉

crcoracle Right there with Babe Points: 778 More actions · Answer 7

Perry Whittle - Monday, December 18, 2017 5:56 AM
crcoracle - Saturday, December 16, 2017 5:23 AM
When I do a manual failover from SQL Server Role from Node_a to Node_b, I can not connect to SQL Server using the AlwaysOn Listener.
Am I missing something?
Regards
What is the status of the listener IP and name resources in the cluster role, after this failover?

Listener and name resources of the Listener Role are UP in node_a after failover SQL Server role to node_b

crcoracle Right there with Babe Points: 778 More actions · Answer 8

Super Cat - Monday, December 18, 2017 6:36 AM
select * from sys.dm_hadr_availability_replica_cluster_states
I would expect to see Joined_FCI for NODE A and B in column Join State Desc
and
Joined_STANDALONE for NODE C
select * from sys.dm_tcp_listener_states
Does the Dashboard show any errors.?

select * from sys.dm_hadr_availability_replica_cluster_states

28C14CED-0282-44B1-8111-12D10A53E5C4 CLSQL2K16REP\AONCLSPRO 8E3CAF1B-AFC7-444F-B76C-A76EFA37D11E 1 JOINED_STANDALONE
D650F444-FF2A-4070-A9D1-2C3A52191644 CLSQL2K16S2\PROINTERNA 8E3CAF1B-AFC7-444F-B76C-A76EFA37D11E 2 JOINED_FCI

select * from sys.dm_tcp_listener_states (I have another AG with another listener)

6    ::    0    5022    2    DATABASE_MIRRORING    0    ONLINE    2017-12-14 10:19:50.807
7    0.0.0.0    1    5022    2    DATABASE_MIRRORING    0    ONLINE    2017-12-14 10:19:50.807
3    ::1    0    53433    0    TSQL    0    ONLINE    2017-12-14 10:19:50.020
4    127.0.0.1    1    53433    0    TSQL    0    ONLINE    2017-12-14 10:19:50.020
1    ::    0    53432    0    TSQL    0    ONLINE    2017-12-14 10:19:50.013
2    0.0.0.0    1    53432    0    TSQL    0    ONLINE    2017-12-14 10:19:50.017

Dashboard says:
This secondary replica is not connected to the primary replica. The connected state is DISCONNECTED.

Perry Whittle SSC Guru Points: 233821 More actions · Answer 9

what does a cluster validation report show?

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"Ya can't make an omelette without breaking just a few eggs" 😉

crcoracle Right there with Babe Points: 778 More actions · Answer 10

When theSQL fail over clustered instance is failed over from node a to node b, primary DB comes "Resolving"

Perry Whittle SSC Guru Points: 233821 More actions · Answer 11

Perry Whittle - Monday, December 18, 2017 10:29 AM
what does a cluster validation report show?

?

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"Ya can't make an omelette without breaking just a few eggs" 😉

AlexSQLForums SSChampion Points: 14277 More actions · Answer 12

crcoracle - Monday, December 18, 2017 4:53 AM
Super Cat - Monday, December 18, 2017 4:04 AM
The node operating as the (AG),PRIMARY will be the node that the LISTENER will connect to.
Super Cat - Monday, December 18, 2017 3:28 AM
Just to be clear NODE A and Node B are set up as an FCI with Node B being Passive.
Node C is the secondary replica of the Instance running on either NODE A or Node B.
The answer to your questions is YES.
If SQL SERVER Is either running on the Primary Node A or Node B. Then the listener can be used.
If the AG is failed over to NODE C. Then the LISTENER can still be used.
Ok, so something is wrong with my configuration because I can not connect through my listener when failover is performed manually from node_a to node_b
Here you can see my problem https://youtu.be/r5A5f5NtW1Y
In the minute 02:10 I move my FCI from node_a to node_b

crcoracle you cannot use cluster manager to move nodes as you showed in the video at 2:10.
You must always use SSMS to failover.

Restrictions on Using The WSFC Failover Cluster Manager with Availability Groups

Do not use the Failover Cluster Manager to manipulate availability groups, for example:

Do not add or remove resources in the clustered service (resource group) for the availability group.
Do not change any availability group properties, such as the possible owners and preferred owners. These properties are set automatically by the availability group.
Do not use the Failover Cluster Manager to move availability groups to different nodes or to fail over availability groups. The Failover Cluster Manager is not aware of the synchronization status of the availability replicas, and doing so can lead to extended downtime. You must use Transact-SQL or SQL Server Management Studio.

Alex S