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The editor will share with you the ways to deal with planned or unexpected events that affect the running status of the instance. I hope you will gain a lot after reading this article. Let's discuss it together.

System event

System events are planned or unexpected events that affect the running state of the instance. Specifically, it refers to events such as restart, stop or release ECS instances due to the detection of update and maintenance, illegal operations, system failures, software and hardware failures, due to expiration of prepaid or account arrears.

Overview

An instance is the core basic component of your business application. After you have completed the selection, purchase, initialization and deployment of the instance, the health status of the instance plays a key role in your business continuity and system reliability. In order to improve system reliability, system performance and security protection capability, ECS will take the initiative to maintain the physical server where the instance resides and repair potential system failures. When a failure or hidden danger is detected on the physical server, ECS migrates the instance online to a healthy server to keep the instance running healthily. These maintenance are routine maintenance. Day-to-day maintenance is different from system events. Day-to-day maintenance is usually done imperceptibly, without sending maintenance notifications and without affecting the instance.

When a system event occurs, ECS sends you notification, response measures, event cycle and other information in a timely manner. For planned system events, information such as the impact of the event on the instance and the expected execution time are informed in advance. You can back up data in a timely manner before performing system events, prepare for the application level, and guard against potential impact on business reliability and continuity. For handled system events, you can query the historical system events of the instances in the past two months to obtain troubleshooting and retrospective analysis data.

Use restriction

Except for the discontinued instance specification families, such as C1, c2, M1, m2, S1, S2, S3, and T1, all instance specification families support the system event feature. For more details, see the example specification family.

Event type

The system event types are shown in the following table.

Event statu

In the life cycle of a system event, there are the following event states.

Event window

System events have the following window periods:

User action window: the period between the initiation and execution of a system event plan. Usually, the window period for system maintenance-related events is 24 to 48 hours, the window period for prepaid instances to stop is 7 to 15 days, and the window period for accounts to be stopped due to arrears is usually less than 1 hour.

Depending on the impact of the event on your business, you can choose the recommended response method to repair the system event in advance, or wait for the default response action to be performed. For the system events triggered by the ECS active repair system failure, ECS will send you an event notification in advance according to the system maintenance operation plan.

Event execution window: if you do not respond to system events in advance, repair failure system events will usually be completed automatically within 6 hours after entering the event execution window, system event instances caused by billing problems will be stopped immediately, classic network type instances will be released after 7 days, and VPC type instances will be released after 15 days. You will then receive the execution result of the system event.

Description

For unexpected system events caused by sudden failures or illegal operations and other non-technical factors, there is usually no user operation window, only a short event execution window. You can query historical system events for troubleshooting, cause analysis, or data recovery.

View system events

If there is a planned system event, a prominent mark appears on the ECS console pending event button to remind you to view it.

Log in to the ECS Management console.

In the left navigation bar, click Overview.

"in the Common actions area of the overview page, click pending events."

Click the system schedule event page, and you can see the instance ID, region, instance running status, event type, recommended action and other relevant information. You can perform the desired actions in the action column.

API action: DescribeInstancesFullStatus queries the system events of the instance.

View historical system events

On the all events page, you can view all system event records that have occurred in the past two months to provide data support for troubleshooting and retrospective analysis.

Log in to the ECS Management console.

In the left navigation bar, click Overview.

In the common actions area of the overview page, click the pending event.

In the left navigation bar, click all events. On the all events page, click system scheduled events > instance to view the instance ID, event type, event status and other related information.

API action: DescribeInstanceHistoryEvents query history system events.

Subscribe to event notification

All system events can be configured with alarm rules through Cloud Monitoring, and you will be notified in time when the event occurs. For more information, please see the Cloud Monitoring documentation, Cloud Product system event Monitoring.

To deal with suggestions

You can respond to system events through console operations or API calls. Managing ECS from system events can improve your underlying perception of ECS and optimize the operation and maintenance of ECS instances.

After reading this article, I believe you have a certain understanding of how to deal with planned or unexpected events that affect the running status of the instance. If you want to know more about it, welcome to follow the industry information channel. Thank you for your reading!

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