Forum Discussion

Copper Contributor

Nov 22, 2019

Solved

Alerts on specific commands applied to Mariadb using log analytics

Hi, I am trying to activate alerts when certain commands are applied to our Mariadb database hosted on Azure. I have diagnostic logs (which record the string of query text used) and I am pushing ...

azure monitor

Query Language

laurakate_young
Nov 28, 2019
Hi CliveWatson

Some great news. Your last suggestion has fixed the problem and my alerts are all running as they should be! Thank you also for the blog series link - it was very helpful.

Thanks again,
Laura

CliveWatson

Former Employee

Nov 22, 2019

Hi laurakate_young

It would be good to know what columns of data you are looking at.

Go to Log Analytics and Run Query

TenantId	SourceSystem	MG	ManagementGroupName	TimeGenerated	Computer	targetVmNicDetails_s	PolicyTimeZone_s	trustedService_s	audit_schema_version_d	event_time_t	sequence_number_d	succeeded_s	is_column_permission_s	session_id_d	server_principal_id_d	database_principal_id_d	target_server_principal_id_d	target_database_principal_id_d	object_id_d	user_defined_event_id_d	transaction_id_d	duration_milliseconds_d	response_rows_d	affected_rows_d	action_id_s	action_name_s	class_type_s	class_type_description_s	securable_class_type_s	client_ip_s	permission_bitmask_s	sequence_group_id_g	session_server_principal_name_s	server_principal_name_s	server_principal_sid_s	database_principal_name_s	target_server_principal_name_s	target_server_principal_sid_s	target_database_principal_name_s	server_instance_name_s	database_name_s	schema_name_s	object_name_s	statement_s	additional_information_s	user_defined_information_s	application_name_s	data_sensitivity_information_s	host_name_s	connection_id_g	event_id_g	is_server_level_audit_s	collectionName_s	databaseRid_s	originalHost_s	keyType_s	subnetId_s	lock_mode_s	resource_owner_type_s	blocked_process_filtered_s	trackingReference_s	DeploymentUnit_s	InstanceName_s	Value_s	multiVmGroupName_s	lastSuccessfulTestFailoverTime_t	Level_d	isRequestSuccess_b	location_s	lastError_elapsed_d	lastError_source_s	lastError_reason_s	lastError_message_s	lastError_section_s	method_s	url_s	responseCode_d	responseSize_d	cache_s	clientTime_d	clientProtocol_s	partitionId_s	activityId_g	requestResourceType_s	requestResourceId_s	collectionRid_s	statusCode_s	duration_s	clientIpAddress_s	requestCharge_s	requestLength_s	responseLength_s	resourceTokenUserRid_s	region_s	partitionId_g	Tenant_s	requestBytes_s	responseBytes_s	timeTaken_s	securityProtocol_s	routingRuleName_s	httpStatusCode_s	httpStatusDetails_s	RunOn_s	identity_claim_ipaddr_s	identity_claim_http_schemas_microsoft_com_claims_authnmethodsreferences_s	tags_businessowner_s	tags_compositeApp_s	tags_costCode_s	error_state_d	RecoveryJobRPLocation_s	JobOperationSubType_s	AlertConsolidationStatus_s	CountOfAlertsConsolidated_s	AlertRaisedOn_s	AlertCode_s	RecommendedAction_s	BackupItemAppVersion_s	BackupItemSourceSize_s	ProtectedContainerName_g	resultDescription_ErrorJobs_s	resultDescription_ChildJobs_s	ProtectedInstanceCount_s	StorageUniqueId_s	StorageConsumedInMBs_s	OldestRecoveryPointTime_s	OldestRecoveryPointLocation_s	LatestRecoveryPointTime_s	LatestRecoveryPointLocation_s	StorageType_s	StorageName_s	ClusterName_s	NodeRole_s	MachineName_s	AppName_s	AppTypeName_s	AdHocOrScheduledJob_s	ProtectedContainerOSType_s	ProtectedContainerOSVersion_s	ProtectedContainerUniqueId_s	ProtectedContainerFriendlyName_s	AgentVersion_s	ProtectedContainerWorkloadType_s	ProtectedContainerName_s	ProtectedContainerProtectionState_s	ProtectedContainerLocation_s	ProtectedContainerType_s	BackupItemProtectionState_s	isAccessPolicyMatch_b	LogBackupFrequency_s	LogBackupRetentionDuration_s	ResourceGroupName_s	uploadRPOInSeconds_d	uploadRPOUpdateTime_t	processedRPOInSeconds_d	processedRPOUpdateTime_t	timeStamp_t	lastRecoveryPoint_t	latestAppConsistentRecoveryPoint_t	replicatingDisksCount_d	tags_LogicAppsCategory_s	ProviderName_s	TaskName_s	keyProperties_type_s	keyProperties_curve_s	keyProperties_operations_s	keyProperties_attributes_enabled_b	keyProperties_size_d	keyProperties_attributes_exp_d	vaultProperties_s	resultDescription_ChildJobs_ContosoWeb4_Linux_60cf5ef0_42db_4036_bf34_8ad5dfb950f7_g	resultDescription_ChildJobs_ContosoWeb0_Linux_de6f0bed_8942_4674_9826_7ae305c7d534_g	resultDescription_ChildJobs_ContosoWeb3_Linux_20a30155_a894_441b_8012_858c00572623_g	recoveryServicesProviderId_g	resultDescription_ErrorJobs_G0_Win2016_1_afbdb526_62b5_4d56_a7f6_79ed4440d868_s	databaseName_s	metric_s	impact_s	detections_s	rootCauseAnalysis_s	intervalStartTime_t	intervalEndTme_t	issueId_d	value_d	user_defined_b	error_number_d	Severity	state_d	logical_io_writes_d	max_logical_io_writes_d	physical_io_reads_d	max_physical_io_reads_d	logical_io_reads_d	max_logical_io_reads_d	execution_type_d	cpu_time_d	max_cpu_time_d	dop_d	max_dop_d	rowcount_d	max_rowcount_d	query_max_used_memory_d	max_query_max_used_memory_d	duration_d	max_duration_d	num_physical_io_reads_d	max_num_physical_io_reads_d	log_bytes_used_d	max_log_bytes_used_d	wait_type_s	start_utc_date_t	end_utc_date_t	delta_max_wait_time_ms_d	delta_signal_wait_time_ms_d	delta_wait_time_ms_d	delta_waiting_tasks_count_d	LogicalServerName_s	ElasticPoolName_s	DatabaseName_s	wait_category_s	is_parameterizable_s	statement_type_s	statement_key_hash_s	query_hash_s	query_plan_hash_s	statement_sql_handle_s	interval_start_time_d	interval_end_time_d	exec_type_d	total_query_wait_time_ms_d	max_query_wait_time_ms_d	query_id_d	plan_id_d	query_param_type_d	count_executions_d	resultDescription_ErrorJobs_ContosoWeb2_ebea0ce7_21cf_4689_8641_e7b2087f188d_s	resultDescription_ErrorJobs_ContosoWeb3_62ae68a6_a33c_4945_9324_dcb7c7c5c5f8_s	resultDescription_ErrorJobs_ContosoIT2_c4469c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b438b4f6-912a-46d5-9cb1-b44069212abc	Azure			2019-11-21T14:15:32.843Z					null	null	null			null	null	null	null	null	null	null	null	null	null	null																																										null	null	null		null							null	null		null																														null																																							null				null	null	null	null	null	null	null	null							null	null	null												null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null	null		null	null	null	null	null	null											null	null	null	null	null	null	null	null	null											null			null	null																									null	null						null							null	null	null	null								null																						null	null																																																																		null										null									null	null	null	null					null	null	null								null	null	null	null	null	null								null			null							null	null	null	null	null																				null	10.6.0.0/24	00-0D-3A-70-8D-0A	10.6.0.6	DefaultRule_AllowVnetOutBound	Out	allow	a938471e-4080-49a9-9055-b66ec742b7f0	01b6eaff-e962-4c22-b5a3-4d54f26adbdc	18651		null	null	null	null	null	null		/SUBSCRIPTIONS/E4272367-5645-4C4E-9C67-3B74B59A6982/RESOURCEGROUPS/CONTOSOAZUREHQ/PROVIDERS/MICROSOFT.NETWORK/NETWORKSECURITYGROUPS/CONTOSOWEB1NSG	NetworkSecurityGroupCounters					NetworkSecurityGroupRuleCounter	e4272367-5645-4c4e-9c67-3b74b59a6982	CONTOSOAZUREHQ	MICROSOFT.NETWORK	CONTOSOWEB1NSG	NETWORKSECURITYGROUPS				AzureDiagnostics	/subscriptions/e4272367-5645-4c4e-9c67-3b74b59a6982/resourcegroups/contosoazurehq/providers/microsoft.network/networksecuritygroups/contosoweb1nsg

So you for example the data was in the OperationName column you could do, one of these?

AzureDiagnostics
| where OperatioName  ==  "drop"

AzureDiagnostics
| where OperatioName  contains  "drop"

AzureDiagnostics
| where OperatioName  ==  "drop" or OperatioName  == "Insert"

I don't have any MariaDB but you may want to add a check for that - something like this before the query:

AzureDiagnostics
| where Resource == "MariaDB"
...

This article might also help: https://techcommunity.microsoft.com/t5/Azure-Sentinel/Tip-Easily-use-JSON-fields-in-Sentinel/ba-p/768747

and https://docs.microsoft.com/en-gb/azure/azure-monitor/log-query/get-started-portal

laurakate_young

Copper Contributor

Nov 27, 2019

Hi CliveWatson

Thank you so much for answering my question. I ran the query you suggested to find the columns which are in the attachment. I also tried to run your operation name queries with no luck and the check for the resource of mariadb also seems not to work! Could this indicate that the mariadb logs are not reaching the log analytics?

Thanks,

Laura

Columns_LY.csv12 KB

CliveWatson
Former Employee
Nov 27, 2019
laurakate_young

You may not have the data or are looking at the wrong thing (I just guessed the Resource name)

Maybe try one of these, you need to find a column that identifies the data (if it exists).

AzureDiagnostics | summarize count() by Resource AzureDiagnostics | search "maria"
- laurakate_young
  Copper Contributor
  Nov 27, 2019
  CliveWatson
  
  That was the problem! Rather than mariadb it needed to be the specific name of the resource. Within the mariadb resource the sql commands are given under "sql_text_s" so I have run a query on that for the commands drop and delete and counting the number seems to work. However when I set the alert condition to greater than 0 in the last 5 minutes (in my mind indicating that one of these commands has been used), I receive emails every 5 minutes following a test of one of the commands. If I change the condition to greater than 1 and run the same test, I don't receive any emails. Any ideas? Thanks
  
  AzureDiagnostics
  | where Resource == "name of database"
  | where sql_text_s contains "drop" or sql_text_s contains "delete"
  | count
  - CliveWatson
    Former Employee
    Nov 27, 2019
    laurakate_young
    
    I would have thought there would be one column that was unique to MariaDB, like there is for SQL - with ResourceProvider. Anyway moving on...
    
    Anyway you may want to assign a count to AggregatedValue
    
    AzureDiagnostics | where Resource == "CONTOSOSQL1NSG" | where sql_text_s contains "drop" or sql_text_s contains "delete" | summarize AggregatedValue = count() by bin(TimeGenerated, 5m)
    
    or just
    
    AzureDiagnostics | where Resource == "CONTOSOSQL1NSG" | where sql_text_s contains "drop" or sql_text_s contains "delete" | summarize AggregatedValue = count()
    
    There a great series of post on Alerts https://cloudadministrator.net/2019/08/15/azure-monitor-alerts-series-part-1/ especially part 7 : https://cloudadministrator.net/2019/10/07/azure-monitor-alert-series-part-7/