Zabbix 监控 AlwaysOn

基于生产环境 SQL Server 业务数据库的特性，需要针对 SQL Server 生产环境几组 AlwaysOn AG 的 Primary Replica 部署如下监控：
1. Windows集群节点不正常
2. 任一业务数据库没加入可用性组
3. AG中任一数据库状态异常
4. 任一数据库延时超过阈值

1. primary replica 检查Windows集群状态不正常的节点数（>0 告警）

SELECT COUNT (*) as NotHealtyCount
FROM sys.dm_hadr_cluster_members
WHERE member_state_desc !='UP';

2. primary replica 检查副本可用数据库个数 与 需要加入AG的业务数据库数 对比 （<后者告警）

SELECT COUNT(*) as DBCount
FROM sys.availability_databases_cluster;

3. primary replica 检查任一数据库状态异常（>0 告警）

SELECT COUNT (*) as NotHealtyCount
FROM [master].[sys].[dm_hadr_database_replica_states]
WHERE [synchronization_health_desc] != N'HEALTHY'

4. primary replica 检查任一数据库延时（>900 告警）

;WITH
AG_Stats AS
(
SELECT AR.replica_server_name,
HARS.role_desc,
Db_name(DRS.database_id) [DBName],
DRS.last_commit_time
FROM   sys.dm_hadr_database_replica_states DRS
INNER JOIN sys.availability_replicas AR ON DRS.replica_id = AR.replica_id
INNER JOIN sys.dm_hadr_availability_replica_states HARS ON AR.group_id = HARS.group_id
AND AR.replica_id = HARS.replica_id
),
Pri_CommitTime AS
(
SELECTreplica_server_name
, DBName
, last_commit_time
FROMAG_Stats
WHERErole_desc = 'PRIMARY'
),
Sec_CommitTime AS
(
SELECTreplica_server_name
, DBName
, last_commit_time
FROMAG_Stats
WHERErole_desc = 'SECONDARY'
)
SELECT ISNULL(DATEDIFF(ss,s.last_commit_time,p.last_commit_time),0) AS [Sync_Lag_Secs]
FROM Pri_CommitTime p
LEFT JOIN Sec_CommitTime s ON [s].[DBName] = [p].[DBName]

Zabbix参数配置示例：

UserParameter=MSSQL.SyncHealth,"C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\SQLCMD.EXE" -d Master -U zabbix -P zabbix -h -1 -W -Q "SELECT COUNT (*) as NotHealtyCount
FROM [master].[sys].[dm_hadr_database_replica_states]
WHERE [synchronization_health_desc] != N''HEALTHY''
"

建议，将1、3、4项配置为模板，2项需要单独配置4个参数。