Cloud Monitor event notifications - ApsaraDB for MongoDB

ApsaraDB for MongoDB supports event notifications for events such as scheduled Operations and Maintenance (O&M) events, minor version upgrades, instance restarts, instance migrations, primary/secondary failovers, and instance failures. You can subscribe to event notifications to obtain timely information about the events. This topic describes the parameter format and content of event notifications that are pushed by Cloud Monitor.

General notification parameters

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong:192******719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance_Switchover", 
    "content": {
    }, 
    "status": "Executed"
}

Parameters:

Name	Description	Example
product	The cloud product to which the system event belongs.	MongoDB
resourceID	The affected resource. Note The value starts with acs:mongodb: and can contain information such as the instance region, Alibaba Cloud account ID, and instance ID.	acs:mongodb:cn-hangzhou:135218574272**:instance/dtsb1gx8vo2265**
level	The level of the system event. CRITICAL: Critical. WARN: Warning. INFO: Informational.	INFO
instanceName	The name of the affected instance. The format is <task_ID>/<instance_name>.	f1es8k10220****/testdb
regionID	The region of the instance.	cn-hangzhou
name	The name of the system event. For more information, see the event names in the supported events below.	Instance:SystemMaintenance.Reboot
content	The custom content of the system event. This field can be empty. For more information, see the corresponding system event below.	-
status	The status of the system event. Canceled: The event is canceled. Executed: The event is complete. Executing: The event is in progress. Waiting: A reminder is sent before execution. Scheduled: The event is scheduled.	Executed

Supported events

Event type	Event description	Event name
Instance scheduled O&M event	Instance scheduled O&M event (Scheduled)	Instance:SystemMaintenance.ScheduledOperation:Scheduled
	Instance scheduled O&M event (Pre-execution reminder)	Instance:SystemMaintenance.ScheduledOperation:ReminderNotifice
	Instance scheduled O&M event (Executing)	Instance:SystemMaintenance.ScheduledOperation:Executing
	Instance scheduled O&M event (Executed)	Instance:SystemMaintenance.ScheduledOperation:Executed
	Instance scheduled O&M event (Canceled)	Instance:SystemMaintenance.ScheduledOperation:Canceled
Instance minor version upgrade	Instance minor version upgrade (Scheduled)	Instance:SystemMaintenance.MinorVersionUpgrade:Scheduled
	Instance minor version upgrade (Pre-execution reminder)	Instance:SystemMaintenance.MinorVersionUpgrade:ReminderNotice
	Instance minor version upgrade (Executing)	Instance:SystemMaintenance.MinorVersionUpgrade:Executing
	Instance minor version upgrade (Executed)	Instance:SystemMaintenance.MinorVersionUpgrade:Executed
	Instance minor version upgrade (Canceled)	Instance:SystemMaintenance.MinorVersionUpgrade:Canceled
Instance restart	Instance restart	Instance:SystemMaintenance.Reboot
Instance migration	Instance migration (Scheduled)	Instance:SystemMaintenance.Transfer:Scheduled
	Instance migration (Pre-execution reminder)	Instance:SystemMaintenance.Transfer:ReminderNotice
	Instance migration (Executing)	Instance:SystemMaintenance.Transfer:Executing
	Instance migration (Executed)	Instance:SystemMaintenance.Transfer:Executed
	Instance migration (Canceled)	Instance:SystemMaintenance.Transfer:Canceled
Instance primary/secondary failover	Instance primary/secondary failover (Failover)	Instance_Failover
Instance primary/secondary failover	Instance primary/secondary failover (Task-triggered switchover)	Instance_Switchover
Instance fault	Instance fault start	Instance_Failure_Start
Instance fault	Instance fault end	Instance_Failure_End

Instance scheduled O&M events

To provide stable and high-quality ApsaraDB services, Alibaba Cloud may initiate scheduled O&M events for your instances. These events can include software and hardware upgrades, configuration upgrades, network upgrades, and parameter adjustments. Event notifications can be sent before, during, and after the execution of a scheduled O&M event.

The following example shows a notification for an instance scheduled O&M event (SSL certificate update).

Scheduled

Notification example:

{
    "product": "MongoDB",
    "resourceID": "acs:mongodb:cn-shanghai: 192******11719:instance/<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionID": "cn-hangzhou",
    "name": "Instance:SystemMaintenance.ScheduledOperation:Scheduled",
    "content": {
        "eventId": "b26***5bc",
        "publishTime": "2025-09-02T10:00:54+08:00",
        "reason": "*** cer***ate *** ab*** *** ex***",
        "product": "Mo***DB",
        "instanceComment": "dds***e54",
        "instanceId": "dds***e54",
        "extra": {
            "eventCode": "rds***ate",
            "instanceInfo": "",
            "eventNameEn": "*** cer***ate up***",
            "impactZh": "Transient instance disconnection",
            "impactEn": "Tr***nt in***ce dis***ion",
            "startTime": "2025-09-19T02:00:00+08:00",
            "detailCode": "SSL***ire",
            "switchTime": "2025-09-19T02:10:00+08:00",
            "cancelCode": "Aff***ire",
            "eventNameZh": "SSL Certificate update"
        },
        "instanceType": "In***ce",
        "eventType": "Mai***nce"
    },
    "status": "Scheduled"
}

Parameters for the content field:

Name	Description	Example and remarks
eventId	The unique ID of the event.	45d924b0-1131-54e8-bb74-1205fbbcc7d6
product	The product.	MongoDB
reason	The reason for the event.	SSL certificate is about to expire
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_ssl_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	* cerate up**
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection
extra.switchTime	The scheduled switchover time for the event.	2025-09-01T02:10:00+08:00
extra.detailCode	The code for the scheduled O&M event.	SSLCertificateAboutToExpire
extra.startTime	The start time of the event.	2025-09-01T02:00:00+08:00
extra.cancelCode	The event cancellation code.	AffectAvailabilityWhenSSLExpire
extra.eventNameZh	The event name in Chinese.	SSL Certificate update
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Pre-execution reminder

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong:192******719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.ScheduledOperation:ReminderNotifice", 
    "content": {
        "eventId": "9715f9ef-54b0-54da-9d56-9d2b11608d59", 
        "product": "MongoDB", 
        "reason": "SSL certificate is about to expire", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_ssl_update", 
            "eventNameEn": "SSL certificate update", 
            "eventNameZh": "SSL Certificate update", 
            "detailCode": "SSLCertificateAboutToExpire", 
            "switchTime": "2025-09-01T02:10:00+08:00", 
            "startTime": "2025-09-01T02:00:00+08:00", 
            "cancelCode": "AffectAvailabilityWhenSSLExpire", 
            "impactZh": "Transient instance disconnection", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***f4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***f4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-12T16:01:26+08:00"
    }, 
    "status": "Waiting"
}

Parameters for the content field:

Name	Description	Example and remarks
eventId	The unique ID of the event.	9715f9ef-54b0-54da-9d56-9d2b11608d59
product	The product.	MongoDB
reason	The reason for the event.	SSL certificate is about to expire
extra	Extended information about the event.	-
extra.eventCode	The event code.	rds_apsaradb_ssl_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.	-
extra.eventNameEn	The event name in English.	* cerate up**
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection
extra.switchTime	The scheduled switchover time for the event.	2025-09-01T02:10:00+08:00
extra.detailCode	The code for the scheduled O&M event.	SSLCertificateAboutToExpire
extra.startTime	The start time of the event.	2025-09-01T02:00:00+08:00
extra.cancelCode	The event cancellation code.	AffectAvailabilityWhenSSLExpire
extra.eventNameZh	The event name in Chinese.	SSL Certificate update
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Executing

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong:192******719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.ScheduledOperation:Executing", 
    "content": {
        "eventId": "9715f9ef-54b0-54da-9d56-9d2b11608d59", 
        "product": "MongoDB", 
        "reason": "SSL certificate is about to expire", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_ssl_update", 
            "execTime": "2025-09-01T02:00:27+08:00", 
            "eventNameEn": "SSL certificate update", 
            "eventNameZh": "SSL Certificate update", 
            "detailCode": "SSLCertificateAboutToExpire", 
            "cancelCode": "AffectAvailabilityWhenSSLExpire", 
            "impactZh": "The task has entered the scheduling queue. The switchover is expected to start at 2025-09-01T02:10:00+08:00. Before the switchover, availability is not affected.", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***5f4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***5f4", 
        "instanceType": "Instance", 
        "publishTime": "2025-09-01T02:00:27+08:00"
    }, 
    "status": "Executing"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	9715f9ef-54b0-54da-9d56-9d2b11608d59
product	The product.	MongoDB
reason	The reason for the event.	SSL certificate is about to expire
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_ssl_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	* cerate up**
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.impactZh	The impact of the event in Chinese.	The task has entered the scheduling queue. The switchover is expected to start at 2025-09-01T02:10:00+08:00. Before the switchover, availability is not affected.
extra.detailCode	The code for the scheduled O&M event.	SSLCertificateAboutToExpire
extra.execTime	The time when the event started.	2025-09-01T02:00:00+08:00
extra.cancelCode	The event cancellation code.	AffectAvailabilityWhenSSLExpire
extra.eventNameZh	The event name in Chinese.	SSL Certificate update
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Executed

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong:192******719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.ScheduledOperation:Executed", 
    "content": {
        "eventId": "9715f9ef-54b0-54da-9d56-9d2b11608d59", 
        "product": "MongoDB", 
        "reason": "SSL certificate is about to expire", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_ssl_update", 
            "execTime": "2025-09-01T02:00:27+08:00", 
            "eventNameEn": "SSL certificate update", 
            "eventNameZh": "SSL Certificate update", 
            "detailCode": "SSLCertificateAboutToExpire", 
            "cancelCode": "AffectAvailabilityWhenSSLExpire", 
            "impactZh": "Transient instance disconnection", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***5f4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***5f4", 
        "instanceType": "Instance", 
        "publishTime": "2025-09-01T02:00:27+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	9715f9ef-54b0-54da-9d56-9d2b11608d59
product	The product.	MongoDB
reason	The reason for the event.	SSL certificate is about to expire
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_ssl_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	* cerate up**
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection
extra.detailCode	The code for the scheduled O&M event.	SSLCertificateAboutToExpire
extra.execTime	The time when the event was completed.	2025-09-01T02:00:00+08:00
extra.cancelCode	The event cancellation code.	AffectAvailabilityWhenSSLExpire
extra.eventNameZh	The event name in Chinese.	SSL Certificate update
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Canceled

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong:192******719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.ScheduledOperation:Canceled", 
    "content": {
        "eventId": "1ac4dbdc-1cec-5af2-9293-d6520c0dfb9c", 
        "product": "MongoDB", 
        "reason": "SSL certificate is about to expire", 
        "extra": {
            "eventCode": "rds_apsaradb_ssl_update", 
            "eventNameEn": "SSL certificate update", 
            "eventNameZh": "SSL Certificate update", 
            "detailCode": "SSLCertificateAboutToExpire", 
            "cancelCode": "AffectAvailabilityWhenSSLExpire", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***5f4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***5f4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-03T00:14:25+08:00"
    }, 
    "status": "Canceled"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	9715f9ef-54b0-54da-9d56-9d2b11608d59
product	The product.	MongoDB
reason	The reason for the event.	SSL certificate is about to expire
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_ssl_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	* cerate up**
extra.detailCode	The code for the scheduled O&M event.	SSLCertificateAboutToExpire
extra.cancelCode	The event cancellation code.	AffectAvailabilityWhenSSLExpire
extra.eventNameZh	The event name in Chinese.	SSL Certificate update
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Instance minor version upgrades

Event notifications can be sent at various stages of the minor version upgrade process.

Scheduled

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.MinorVersionUpgrade:Scheduled", 
    "content": {
        "eventId": "7643e4c3-21f6-543e-af78-adbae1913692", 
        "product": "MongoDB", 
        "reason": "Proxy node host maintenance/upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection, minor version upgrade", 
            "eventCode": "rds_apsaradb_upgrade", 
            "eventNameEn": "Minor version update", 
            "eventNameZh": "Minor version upgrade", 
            "detailCode": "ProxyNodeHostMaintain", 
            "switchTime": "2025-09-16T03:30:00+08:00", 
            "startTime": "2025-09-16T03:25:00+08:00", 
            "cancelCode": "HostMachineRiskProxyStability", 
            "impactZh": "Transient instance disconnection, minor version number update", 
            "instanceInfo": ""
        }, 
        "instanceId": " dds-***04", 
        "eventType": "Maintenance", 
        "instanceComment": "Replica***Subscription", 
        "instanceType": "Instance", 
        "publishTime": "2025-09-02T16:32:25+08:00"
    }, 
    "status": "Scheduled"
}

Parameters for the content field:

Name	Description	Example value
eventId	The system event ID.	be8***ed7
publishTime	The time when the notification was pushed.	2025-08-28T14:00:00+08:00
reason	The reason for the event.	Proxy node host maintenance/upgrade
product	The product name.	Mo***DB
instanceComment	The instance name.	dds***ab4
instanceId	The instance ID.	dds***ab4
extra	Extended information.
extra.switchTime	The scheduled switchover time for the event.	2025-08-13T04:50:00+08:00
extra.startTime	The start time of the event.	2025-08-13T04:45:00+08:00
extra.eventNameEn	The event name in English.	Minor version update
extra.eventNameZh	The event name in Chinese.	Minor version upgrade
extra.detailCode	The detailed code for the event reason.	ProxyNodeHostMaintain
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.impactEn	The impact of the event in English.	Transient instance disconnection, minor version upgrade
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.	s-pz*384,s-pz9d4,d-pzf84,dds-pz5f4-cs,d-pz**a14
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection, minor version number update
extra.eventCode	The event code.	rds_apsaradb_upgrade
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
eventType	The event type.	Maintenance

Pre-execution reminder

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:na-south-1:176******461:instance/<resource-id>", 
    "level": "INFO", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.MinorVersionUpgrade:ReminderNotice", 
    "content": {
        "eventId": "7c6228ee-8a28-5cc3-a374-44a68cb52686", 
        "product": "MongoDB", 
        "reason": "Proxy node host maintenance/upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection, minor version upgrade", 
            "eventCode": "rds_apsaradb_upgrade", 
            "eventNameEn": "Minor version update", 
            "eventNameZh": "Minor version upgrade", 
            "detailCode": "ProxyNodeHostMaintain", 
            "switchTime": "2025-08-13T04:50:00+08:00", 
            "startTime": "2025-08-13T04:45:00+08:00", 
            "cancelCode": "HostMachineRiskProxyStability", 
            "impactZh": "Transient instance disconnection, minor version number update", 
            "instanceInfo": "s-pz***384,s-pz***9d4,d-pz***f84,dds-pz***5f4-cs,d-pz***a14"
        }, 
        "instanceId": "dds-***5f4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***5f4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-06T14:10:56+08:00"
    }, 
    "status": "Waiting"
}

Parameters for the content field:

Name	Description	Example value
eventId	The system event ID.	be8***ed7
publishTime	The time when the notification was pushed.	2025-08-28T14:00:00+08:00
reason	The reason for the event.	Proxy node host maintenance/upgrade
product	The product name.	Mo***DB
instanceComment	The instance name.	dds***ab4
instanceId	The instance ID.	dds***ab4
extra	Extended information.
extra.switchTime	The scheduled switchover time for the event.	2025-08-13T04:50:00+08:00
extra.startTime	The start time of the event.	2025-08-13T04:45:00+08:00
extra.eventNameEn	The event name in English.	Minor version update
extra.eventNameZh	The event name in Chinese.	Minor version upgrade
extra.detailCode	The detailed code for the event reason.	ProxyNodeHostMaintain
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.impactEn	The impact of the event in English.	Transient instance disconnection, minor version upgrade
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.	s-pz*384,s-pz9d4,d-pzf84,dds-pz5f4-cs,d-pz**a14
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection, minor version number update
extra.eventCode	The event code.	rds_apsaradb_upgrade
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
eventType	The event type.	Maintenance

Executing

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.MinorVersionUpgrade:Executing", 
    "content": {
        "eventId": "d1eb313e-eb1d-5f8f-b78b-b34a261604e9", 
        "product": "MongoDB", 
        "reason": "Proxy node host maintenance/upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection, minor version upgrade", 
            "eventCode": "rds_apsaradb_upgrade", 
            "execTime": "2025-07-24T16:47:56+08:00", 
            "eventNameEn": "Minor version update", 
            "eventNameZh": "Minor version upgrade", 
            "detailCode": "ProxyNodeHostMaintain", 
            "cancelCode": "HostMachineRiskProxyStability", 
            "impactZh": "The task has entered the scheduling queue. The switchover is expected to start at 2025-07-24T16:52:52+08:00. Before the switchover, availability is not affected.", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***394", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***394", 
        "instanceType": "Instance", 
        "publishTime": "2025-07-24T16:47:56+08:00"
    }, 
    "status": "Executing"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	d1eb313e-eb1d-5f8f-b78b-b34a261604e9
product	The product.	MongoDB
reason	The reason for the event.	Proxy node host maintenance/upgrade
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_upgrade
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	Minor version update
extra.impactEn	The impact of the event in English.	Transient instance disconnection, minor version upgrade
extra.impactZh	The impact of the event in Chinese.	The task has entered the scheduling queue. The switchover is expected to start at 2025-07-24T16:52:52+08:00. Before the switchover, availability is not affected.
extra.detailCode	The code for the scheduled O&M event.	ProxyNodeHostMaintain
extra.execTime	The time when the event started.	2025-07-24T02:00:00+08:00
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.eventNameZh	The event name in Chinese.	Minor version upgrade
instanceId	The instance ID.	dds-***394
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***394
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-07-24T10:10:43+08:00

Executed

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.MinorVersionUpgrade:Executed", 
    "content": {
        "eventId": "245075c7-1a14-59af-a234-61ee25094860", 
        "product": "MongoDB", 
        "reason": "Proxy node host maintenance/upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection, minor version upgrade", 
            "eventCode": "rds_apsaradb_upgrade", 
            "execTime": "2025-07-24T16:52:54+08:00", 
            "eventNameEn": "Minor version update", 
            "eventNameZh": "Minor version upgrade", 
            "detailCode": "ProxyNodeHostMaintain", 
            "cancelCode": "HostMachineRiskProxyStability", 
            "impactZh": "Transient instance disconnection, minor version number update", 
            "instanceInfo": "s-***354,s-***b24,d-***264,d-***844,dds-***4-cs"
        }, 
        "instanceId": "dds-pz51c4144f4747a4", 
        "eventType": "Maintenance", 
        "instanceComment": "zq-sharding-ssd-prepaid", 
        "instanceType": "Instance", 
        "publishTime": "2025-07-24T15:52:55+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	245075c7-1a14-59af-a234-61ee25094860
product	The product.	MongoDB
reason	The reason for the event.	Proxy node host maintenance/upgrade
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.	s-*354,s-b24,d-264,d-844,dds-**4-cs
extra.eventNameEn	The event name in English.	Minor version update
extra.impactEn	The impact of the event in English.	Transient instance disconnection, minor version upgrade
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection, minor version number update
extra.detailCode	The code for the scheduled O&M event.	ProxyNodeHostMaintain
extra.execTime	The time when the event was completed.	2025-09-01T02:00:00+08:00
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.eventNameZh	The event name in Chinese.	Minor version upgrade
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***ce4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Canceled

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.MinorVersionUpgrade:Canceled", 
    "content": {
        "eventId": "399bf2a3-254c-5386-acd5-a124ab63060c", 
        "product": "MongoDB", 
        "reason": "Proxy node host maintenance/upgrade", 
        "extra": {
            "eventCode": "rds_apsaradb_upgrade", 
            "eventNameEn": "Minor version update", 
            "eventNameZh": "Minor version upgrade", 
            "detailCode": "ProxyNodeHostMaintain", 
            "cancelCode": "HostMachineRiskProxyStability", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***6b4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***6b4", 
        "instanceType": "Instance", 
        "publishTime": "2025-07-24T17:13:35+08:00"
    }, 
    "status": "Canceled"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	399bf2a3-254c-5386-acd5-a124ab63060c
product	The product.	MongoDB
reason	The reason for the event.	Proxy node host maintenance/upgrade
extra	Extended information about the event.
extra.eventCode	The event code.	rds_apsaradb_update
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.
extra.eventNameEn	The event name in English.	Minor version update
extra.detailCode	The code for the scheduled O&M event.	ProxyNodeHostMaintain
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.eventNameZh	The event name in Chinese.	Minor version upgrade
instanceId	The instance ID.	dds-***6b4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***6b4
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00

Instance restart

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:na-south-1:176******461:instance/<resource-id>", 
    "level": "INFO", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.Reboot", 
    "content": {
        "eventId": "740e68cd6c4b92e1143ecad98d54a0ad", 
        "product": "MongoDB", 
        "reason": "", 
        "extra": {
            "eventTime": "2025-08-26T12:36:06+08:00", 
            "cloudEvent": {
                "data": {
                    "uid": "140******49", 
                    "eventCode": "Instance:SystemMaintenance.Reboot", 
                    "instanceId": "dds-***0c4", 
                    "eventType": "SystemMaintenance", 
                    "regionID": "cn-shenzhen", 
                    "eventId": "e-0mqrlfhomixumi6osh", 
                    "maineventId": null, 
                    "eventReason": "SystemMaintenance.Reboot", 
                    "hasLifeCycle": 0, 
                    "dbType": "mongodb", 
                    "cmsProduct": "MongoDB", 
                    "product": "dds", 
                    "handleStatus": "None", 
                    "sourceType": "User", 
                    "eventDetail": "{\"caller_user_ID\":\"\",\"node_name\":\"dds-***0c4\"}", 
                    "eventCategory": "Notification", 
                    "detailImpact": "-", 
                    "isClosed": 1, 
                    "eventImpact": "Reboot", 
                    "startTime": "2025-08-26T04:36:06Z", 
                    "gmtModified": "2025-08-26T04:37:27Z", 
                    "eventLevel": "INFO", 
                    "detailReason": "-", 
                    "resourceType": "Instance", 
                    "gmtCreated": "2025-08-26T04:37:27Z", 
                    "eventStatus": "Executed", 
                    "endTime": "2025-08-26T04:36:06Z"
                }, 
                "region": "cn-shenzhen", 
                "time": "2025-08-26T04:37:27Z", 
                "source": "acs:dds:mongodb", 
                "type": "Instance:SystemMaintenance.Reboot", 
                "specversion": "1.0", 
                "ID": "e-0mqrlfhomixumi6osh", 
                "subject": "acs:dds:cn-shenzhen:140******49:instance/dds-***0c4"
            }, 
            "region": "cn-shenzhen"
        }, 
        "instanceId": "dds-***0c4", 
        "eventType": "Notification", 
        "instanceComment": "dusai_api_test_EncryptionKey", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-26T12:37:34+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example value
eventId	The unique ID of the event.	740e68cd6c4b92e1143ecad98d54a0ad
product	The product name.	MongoDB
reason	The reason for the event.
extra	Extended information.
extra.eventTime	The time when the event was recorded.	2025-08-26T12:36:06+08:00
extra.cloudEvent.data	Details of the cloud event.
extra.cloudEvent.data.uid	The UID that corresponds to the instance.	140******49
extra.cloudEvent.data.eventCode	The event name.	Instance:SystemMaintenance.Reboot
extra.cloudEvent.data.instanceId	The instance ID.	dds-***0c4
extra.cloudEvent.data.eventType	The event type.	SystemMaintenance
extra.cloudEvent.data.regionID	The region where the event occurred.	cn-shenzhen
extra.cloudEvent.data.eventId	The UUID of the event. This ID uniquely identifies the event.	e-0mqrlfhomixumi6osh
extra.cloudEvent.data.maineventId	The ID of the main event. This parameter is not empty if a main event exists.	null
extra.cloudEvent.data.eventReason	The reason for the event.	SystemMaintenance.Reboot
extra.cloudEvent.data.hasLifeCycle	Indicates whether the event has a lifecycle.	0
extra.cloudEvent.data.dbType	The database type.	mongodb
extra.cloudEvent.data.cmsProduct	The product.	MongoDB
extra.cloudEvent.data.product	The product code.	dds
extra.cloudEvent.data.handleStatus		None
extra.cloudEvent.data.sourceType	The source of the event.	User/ScheduledEvent User/ScheduledEvent
extra.cloudEvent.data.eventDetail	The details of the event.	{\"caller_user_ID\":\"\",\"node_name\":\"dds-***0c4\"}
extra.cloudEvent.data.eventCategory	The event type.	Notification
extra.cloudEvent.data.detailImpact	The detailed impact.	-
extra.cloudEvent.data.isClosed		1
extra.cloudEvent.data.eventImpact	The impact of the event.	Reboot
extra.cloudEvent.data.startTime	The time when the event was reported.	2025-08-26T04:36:06Z
extra.cloudEvent.data.gmtModified	The time when the event record was modified.	2025-08-26T04:37:27Z
extra.cloudEvent.data.eventLevel	The event level. Valid values: INFO, WARN, and CRITICAL.	INFO
extra.cloudEvent.data.detailReason	The detailed reason.	-
extra.cloudEvent.data.resourceType	The instance type. Instance: An instance event. Host: A host event.	Instance
extra.cloudEvent.data.gmtCreated	The time when the event record was created.	2025-08-26T04:37:27Z
extra.cloudEvent.data.eventStatus	The event status.	Executed
extra.cloudEvent.data.endTime	The end time of the event.	2025-08-26T04:36:06Z
extra.cloudEvent.region	The region where the event occurred.	cn-shenzhen
extra.cloudEvent.time	The time when the event was processed. The time is in UTC.	2025-08-26T04:37:27Z
extra.cloudEvent.source	The value is fixed to acs. product indicates the product name. dbtype indicates the database type. `acs:${product}:${dbtype}`	acs:dds:mongodb
extra.cloudEvent.type	The identifier of the event class. `(Instance)\|(Host)\|(Component):(ExceptionEvent)\|(${other_event})`	Instance:SystemMaintenance.Reboot
extra.cloudEvent.specversion	The version number of the CloudEvents format. The value is fixed to 1.0.	1.0
extra.cloudEvent.id	The UUID of the event. This ID uniquely identifies the event.	e-0mqrlfhomixumi6osh
extra.cloudEvent.subject	Information about the entity where the event occurred. `acs:${product}:${dbtype}:${region}:${accountID}:(instance)\|(host)\|(component)/${target_name}` The value is fixed to acs. product indicates the product name. dbtype indicates the database type. region indicates the region. accountID indicates the user ID. target_name indicates the name of the entity where the event occurred.	acs:dds:cn-shenzhen:140****49:instance/dds-*0c4
instanceId	The instance ID.	dds-***ce4
eventType	The event type.	InstanceMaintenance
instanceComment	The instance name.	api_test
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
publishTime	The time when the notification was created.	2025-08-26T12:37:34+08:00

Instance migrations

Event notifications can be sent at various stages of the instance migration process.

Scheduled

Notification example:

{
    "product": "MongoDB",
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>",
    "level": "WARN",
    "instanceName": "instanceName",
    "regionID": "cn-hangzhou",
    "name": "Instance:SystemMaintenance.Transfer:Scheduled",
    "content":{
    "eventId": "50f7a836-e9a7-543a-9e3a-95ac0d757b35",
    "product": "MongoDB",
    "reason": "Host software/hardware upgrade",
    "extra":
    {
        "impactEn": "Transient instance disconnection",
        "eventCode": "rds_apsaradb_transfer",
        "eventNameEn": "Instance migration",
        "eventNameZh": "Instance migration",
        "detailCode": "HostSoftHardwareUpgrade",
        "switchTime": "2025-08-25T04:30:00+08:00",
        "startTime": "2025-08-24T15:30:00+08:00",
        "cancelCode": "OutOfGoodPerfBySoftHardwareUpgrade",
        "impactZh": "Transient instance disconnection",
        "instanceInfo": ""
    },
    "instanceId": "dds-t4n6ab765e1a90d4",
    "eventType": "Maintenance",
    "instanceComment": "whisper_sg",
    "instanceType": "Instance",
    "publishTime": "2025-08-20T16:00:55+08:00"
},
    "status": "Scheduled"
}

Parameters for the content field:

Name	Description	Example value
eventId	The system event ID.	be8***ed7
publishTime	The time when the notification was pushed.	2025-08-25T14:00:00+08:00
reason	The reason for the event.	Host software/hardware upgrade
product	The product name.	Mo***DB
instanceComment	The instance name.	dds***ab4
instanceId	The instance ID.	dds***ab4
extra	Extended information.	Instance migration
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.eventCode	The event code.	rds_apsaradb_transfer
extra.eventNameEn	The event name in English.	Instance migration
extra.eventNameZh	The event name in Chinese.	Instance migration
extra.detailCode	The detailed code for the event reason.	ProxyNodeHostMaintain
extra.cancelCode	The event cancellation code.	HostMachineRiskProxyStability
extra.switchTime	The switchover time.	2025-08-25T04:30:00+08:00
extra.startTime	The start time.	2025-08-24T15:30:00+08:00
extra.impactEn	The impact of the event in English.	Transient instance disconnection, minor version upgrade
extra.instanceInfo	Instance information. This parameter is available only for sharded cluster instances.	s-pz*384,s-pz9d4,d-pzf84,dds-pz5f4-cs,d-pz**a14
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
eventType	The event type.	Maintenance

Pre-execution reminder

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.Transfer:Waiting", 
    "content": {
        "eventId": "b062abe3-2ad1-511f-a379-0d7a4e08de99", 
        "product": "MongoDB", 
        "reason": "Host software/hardware upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_transfer", 
            "eventNameEn": "Instance migration", 
            "eventNameZh": "Instance migration", 
            "detailCode": "HostSoftHardwareUpgrade", 
            "switchTime": "2025-08-25T04:30:00+08:00", 
            "startTime": "2025-08-24T15:30:00+08:00", 
            "cancelCode": "OutOfGoodPerfBySoftHardwareUpgrade", 
            "impactZh": "Transient instance disconnection", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***ce4", 
        "eventType": "Maintenance", 
        "instanceComment": "Production mongod", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-24T06:30:00+08:00"
    }, 
    "status": "Waiting"
}

Parameters for the content field:

Name	Description	Example value
eventId	The ID of the system event.	be8***ed7
publishTime	Push time.	2025-08-25T14:00:00+08:00
reason	Event reason.	Host software/hardware upgrade
product	Product name.	Mo***DB
instanceComment	Instance name.	dds***ab4
instanceId	Instance ID.	dds***ab4
extra	Additional information.	Instance migration
extra.impactEn	Event impact (English).	Transient instance disconnection
extra.eventCode	Event code.	rds_apsaradb_transfer
extra.eventNameEn	Event name (English).	Instance migration
extra.eventNameZh	Event name (Chinese).	Instance migration
extra.detailCode	The detailed reason code for the event.	ProxyNodeHostMaintain
extra.cancelCode	Event cancellation code.	HostMachineRiskProxyStability
extra.switchTime	Switch time.	2025-08-25T04:30:00+08:00
extra.startTime	Start time.	2025-08-24T15:30:00+08:00
extra.impactEn	Event impact (English).	Transient instance disconnection, minor version upgrade
extra.instanceInfo	The information about the instance. This parameter is returned only for sharded cluster instances.	s-pz*384,s-pz9d4,d-pzf84,dds-pz5f4-cs,d-pz**a14
instanceType	The type of the instance. Instance: An instance event. Host: A host event.	Instance
eventType	Event type.	Maintenance

Execution started

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.Transfer:Executing", 
    "content": {
        "eventId": "b062abe3-2ad1-511f-a379-0d7a4e08de99", 
        "product": "MongoDB", 
        "reason": "Host software/hardware upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_transfer", 
            "execTime": "2025-08-25T05:00:01+08:00", 
            "eventNameEn": "Instance migration", 
            "eventNameZh": "Instance migration", 
            "detailCode": "HostSoftHardwareUpgrade", 
            "cancelCode": "OutOfGoodPerfBySoftHardwareUpgrade", 
            "impactZh": "The task has entered the scheduling queue. The switch is expected to start at 2025-08-25T05:10:00+08:00. Availability is not affected before the switch.", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***0a4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***0a4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-25T05:00:01+08:00"
    }, 
    "status": "Executing"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	b062abe3-2ad1-511f-a379-0d7a4e08de99
product	The product category.	MongoDB
reason	The reason for the event.	Host software/hardware upgrade
extra	Additional information about the event.
extra.eventCode	The event code.	rds_apsaradb_transfer
extra.instanceInfo	Information about the instance. This field is available only for sharded cluster instances.
extra.eventNameEn	The name of the event in English.	Instance migration
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.impactZh	The impact of the event in Chinese.	The task has entered the scheduling queue. The switch is expected to start at 2025-08-25T05:10:00+08:00. Availability is not affected before the switch.
extra.detailCode	The code for the scheduled O&M event.	HostSoftHardwareUpgrade
extra.execTime	The start time of the event.	2025-08-25T05:00:01+08:00
extra.cancelCode	The event cancellation code.	OutOfGoodPerfBySoftHardwareUpgrade
extra.eventNameZh	The name of the event in Chinese.	Instance migration
instanceId	The instance ID.	dds-***0a4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***0a4
instanceType	The instance type. Instance: An event related to an instance. Host: An event related to a host.	Instance
publishTime	The time when the notification was created.	2025-08-25T05:00:01+08:00

Execution complete

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.Transfer:Executed", 
    "content": {
        "eventId": "b062abe3-2ad1-511f-a379-0d7a4e08de99", 
        "product": "MongoDB", 
        "reason": "Host software/hardware upgrade", 
        "extra": {
            "impactEn": "Transient instance disconnection", 
            "eventCode": "rds_apsaradb_transfer", 
            "execTime": "2025-08-25T06:30:00+08:00", 
            "eventNameEn": "Instance migration", 
            "eventNameZh": "Instance migration", 
            "detailCode": "HostSoftHardwareUpgrade", 
            "cancelCode": "OutOfGoodPerfBySoftHardwareUpgrade", 
            "impactZh": "Transient instance disconnection", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***0a4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***0a4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-25T06:30:00+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Note	Example
eventId	The unique ID of the event.	b062abe3-2ad1-511f-a379-0d7a4e08de99
product	Product category	MongoDB
reason	Event reason	Host software/hardware upgrade
extra	Additional information about the event
extra.eventCode	Event code	rds_apsaradb_transfer
extra.instanceInfo	Information about the instance. This parameter is returned only for sharded cluster instances.
extra.eventNameEn	Event name (English)	Instance migration
extra.impactEn	Event impact (English)	Transient instance disconnection
extra.impactZh	Event impact (Chinese)	Instance transient connection
extra.detailCode	The code of the scheduled O&M event.	HostSoftHardwareUpgrade
extra.execTime	The completion time of the event execution.	2025-08-25T06:30:00+08:00
extra.cancelCode	Event cancellation code	OutOfGoodPerfBySoftHardwareUpgrade
extra.eventNameZh	Event name (Chinese)	Instance migration
instanceId	Instance ID	dds-***0a4
eventType	Event type	Maintenance
instanceComment	Instance name	dds-***0a4
instanceType	Instance type Instance: Instance event Host: Host event	Instance
publishTime	Notification creation time	2025-08-25T06:30:00+08:00

Canceled

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-hongkong: 192******11719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance:SystemMaintenance.Transfer:Canceled", 
    "content": {
        "eventId": "ba074fbf-9e57-5199-a70f-1976d1ef249e", 
        "product": "MongoDB", 
        "reason": "Host software/hardware upgrade", 
        "extra": {
            "eventCode": "rds_apsaradb_transfer", 
            "eventNameEn": "Instance migration", 
            "eventNameZh": "Instance migration", 
            "detailCode": "HostSoftHardwareUpgrade", 
            "cancelCode": "OutOfGoodPerfBySoftHardwareUpgrade", 
            "instanceInfo": ""
        }, 
        "instanceId": "dds-***6b4", 
        "eventType": "Maintenance", 
        "instanceComment": "dds-***6b4", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-16T22:21:00+08:00"
    }, 
    "status": "Canceled"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	ba074fbf-9e57-5199-a70f-1976d1ef249e
product	The product category.	MongoDB
reason	The reason for the event.	Host software/hardware upgrade
extra	Additional information about the event.
extra.eventCode	The event code.	rds_apsaradb_transfer
extra.instanceInfo	Information about the instance. This field is available only for sharded cluster instances.
extra.eventNameEn	The name of the event in English.	Instance migration
extra.detailCode	The code for the scheduled O&M event.	HostSoftHardwareUpgrade
extra.cancelCode	The code for the event cancellation.	OutOfGoodPerfBySoftHardwareUpgrade
extra.eventNameZh	The name of the event in Chinese.	Instance migration
instanceId	The instance ID.	dds-***6b4
eventType	The event type.	Maintenance
instanceComment	The instance name.	dds-***6b4
instanceType	The instance type. Instance: An event related to an instance. Host: An event related to a host.	Instance
publishTime	The time when the notification was created.	2025-08-16T22:21:00+08:00

Instance primary/secondary failover

Failover

Notification example:

{
    "product": "MongoDB",
    "resourceID": "acs:mongodb:cn-shanghai-cloudspe:192****1719:instance/<resource-id>",
    "level": "WARN",
    "instanceName": "instanceName",
    "regionID": "cn-hangzhou",
    "name": "Instance_Failover",
    "content": {
        "InstanceName": "dds***b84",
        "eventId": "7b1***b2c",
        "publishTime": "2025-09-02T10:27:15+08:00",
        "reason": "",
        "product": "Mo***DB",
        "instanceComment": "dds***b84",
        "instanceId": "dds***b84",
        "EventType": "Ins***nce",
        "extra": {
            "node": "",
            "impact": "Instance***",
            "reason": "Instance fault (*** error))",
            "eventTime": "2025-09-02T10:26:41+08:00",
            "nodeInfo": [],
            "reasonCode": "Pla***ror"
        },
        "instanceType": "In***ce",
        "eventType": "Ins***nce",
        "Timestamp": "1756780035.398"
    },
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example
InstanceName	The name of the instance.	dds***b84
eventId	The unique ID of the event.	7b1***b2c
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00
reason	The reason for the event.
product	The product.	MongoDB
instanceComment	The name of the instance.	dds***b84
instanceId	The ID of the instance.	dds***b84
extra	The extended information.
extra.nodeZh	The node information in Chinese.	d-bp11eb739a1f81c4 (Applies to sharded cluster instance scenarios)
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection.
extra.reasonEn	The reason for the event in English.	Instance Failures(Primary Instance Unavailable)
extra.eventTime	The time when the event was triggered.	2025-09-01T10:09:32+08:00
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.reasonZh	The reason for the event in Chinese.	Instance is abnormal (Master is unavailable).
extra.nodeInfo	Information about the nodes related to the instance.
extra.nodeEn	The node information in English.
extra.reasonCode	The reason code for the event.	Platform.Ha.PrimaryInstanceUnavailable
instanceType	The type of the instance. Instance: An instance event. Host: A host event.	Instance
eventType	The type of the event.	InstanceMaintenance

Switchover

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:cn-qingdao:192****1719:instance/<resource-id>", 
    "level": "WARN", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance_Switchover", 
    "content": {
        "eventId": "569279dc-bc3c-5007-a84b-92a4acbe82ab", 
        "product": "MongoDB", 
        "reason": "", 
        "extra": {
            "eventTime": "2025-09-01T10:31:48+08:00", 
            "impact": "Transient instance connection", 
            "nodeInfo": [ ], 
            "node": "", 
            "reason": "", 
            "reasonCode": ""
        }, 
        "instanceId": "dds-****54", 
        "eventType": "InstanceMaintenance", 
        "instanceComment": "du***test", 
        "instanceType": "Instance", 
        "publishTime": "2025-09-01T10:32:43+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example
eventId	The unique ID of the event.	7b1***b2c
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00
reason	The reason for the event.
product	The product class.	MongoDB
instanceComment	The name of the instance.	dds***b84
instanceId	The ID of the instance.	dds***b84
extra	The extended information.
extra.nodeZh	The node information in Chinese.
extra.impactZh	The impact of the event in Chinese.	Transient instance disconnection.
extra.reasonEn	The reason for the event in English.
extra.eventTime	The time when the event was triggered.	2025-09-01T10:09:32+08:00
extra.impactEn	The impact of the event in English.	Transient instance disconnection
extra.reasonZh	The reason for the event in Chinese.	Transient instance disconnection.
extra.nodeInfo	Information about the nodes related to the instance.
extra.nodeEn	The node information in English.
extra.reasonCode	The reason code for the event.
instanceType	The type of the instance. Instance: An instance event. Host: A host event.	Instance
eventType	The type of the event.	InstanceMaintenance

Instance primary/secondary failovers

Problem start

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:na-south-1:192****1719:instance/<resource-id>", 
    "level": "CRITICAL", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance_Failure_Start", 
    "content": {
        "eventId": "44e3e82d-9738-5cd4-bccc-8e51d2a5e345", 
        "product": "MongoDB", 
        "reason": "", 
        "extra": {
            "eventTime": "2025-08-31T20:33:21+08:00", 
            "impactEn": "", 
            "nodeInfo": [ ], 
            "nodeZh": "", 
            "reasonEn": "", 
            "reasonZh": "", 
            "nodeEn": "", 
            "impactZh": "", 
            "reasonCode": ""
        }, 
        "instanceId": "dds-***8d84", 
        "eventType": "InstanceFailure", 
        "instanceComment": "dds-***8d84", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-31T20:33:42+08:00"
    }, 
    "status": "Executing"
}

Parameters for the content field:

Name	Note	Example
InstanceName	Instance name	dds***b84
eventId	The unique ID of the event.	7b1***b2c
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00
reason	The reason for the event.
product	The product name.	MongoDB
instanceComment	Instance name.	dds***b84
instanceId	Instance ID.	dds***b84
extra	Extra information.
extra.nodeZh	Node information (Chinese).
extra.impactZh	Event impact (Chinese).
extra.reasonEn	Event reason (English).
extra.eventTime	The time the event was triggered.	2025-09-01T10:09:32+08:00
extra.impactEn	Event impact (English).
extra.reasonZh	Event reason (Chinese).
extra.nodeInfo	Node information for the instance.
extra.nodeEn	Node information (English).
extra.reasonCode	Event reason code.
instanceType	Instance type: Instance: Instance event. Host: Host event.	Instance
eventType	Event type.	InstanceMaintenance

Failure resolved

Notification example:

{
    "product": "MongoDB", 
    "resourceID": "acs:mongodb:na-south-1:192****1719:instance/<resource-id>", 
    "level": "CRITICAL", 
    "instanceName": "instanceName", 
    "regionID": "cn-hangzhou", 
    "name": "Instance_Failure_End", 
    "content": {
        "eventId": "b37da090-ca56-512c-9f17-43dd91820378", 
        "product": "MongoDB", 
        "reason": "", 
        "extra": {
            "eventTime": "2025-08-31T20:36:21+08:00", 
            "impactEn": "", 
            "nodeInfo": [ ], 
            "nodeZh": "", 
            "reasonEn": "", 
            "reasonZh": "", 
            "nodeEn": "", 
            "impactZh": "", 
            "reasonCode": ""
        }, 
        "instanceId": "dds-***8d84", 
        "eventType": "InstanceFailureRecovery", 
        "instanceComment": "dds-***8d84", 
        "instanceType": "Instance", 
        "publishTime": "2025-08-31T20:36:43+08:00"
    }, 
    "status": "Executed"
}

Parameters for the content field:

Name	Description	Example
InstanceName	The instance name.	dds***b84
eventId	The unique ID of the event.	7b1***b2c
publishTime	The time when the notification was created.	2025-09-01T10:10:43+08:00
reason	The reason for the event.
product	The product category.	MongoDB
instanceComment	The instance name.	dds***b84
instanceId	The instance ID.	dds***b84
extra	Extended information.
extra.nodeZh	Node information in Chinese.
extra.impactZh	The impact of the event in Chinese.
extra.reasonEn	The reason for the event in English.
extra.eventTime	The time when the event was triggered.	2025-09-01T10:09:32+08:00
extra.impactEn	The impact of the event in English.
extra.reasonZh	The reason for the event in Chinese.
extra.nodeInfo	Information about nodes related to the instance.
extra.nodeEn	Node information in English.
extra.reasonCode	The reason code for the event.
instanceType	The instance type. Instance: An instance event. Host: A host event.	Instance
eventType	The event type.	InstanceMaintenance