AS and Other Services

AS can work with other cloud services to meet your requirements for different scenarios.

Figure 1 shows the relationships between AS and other services.

Figure 1 Relationships between AS and other services
Click to enlarge

**Table 1** Related services
Service	Description	Interaction	Reference
Elastic Load Balance (ELB)	After ELB is configured, AS automatically associates ECS instances to a load balancer listener when adding ECSs, and unbinds them when removing the instances. For AS to work with ELB, the AS group and load balancer must be in the same VPC.	ELB distributes traffic to all ECSs in an AS group.	(Optional) Adding a Load Balancer to an AS Group
Cloud Eye	If an alarm-triggered policy is configured, AS triggers scaling actions when an alarm condition specified in Cloud Eye is met.	AS scales resources based on ECS instance status monitored by Cloud Eye.	AS Metrics
ECS	ECS instances added in a scaling action can be managed and maintained on the ECS console.	AS automatically adjusts the number of ECS instances.	Dynamically Expanding Resources and Scheduled Scaling
Simple Message Notification (SMN)	If you enable the SMN service, the system sends you notifications about the status of your AS group in a timely manner.	Message notification	Configuring Notification for an AS Group
Cloud Trace Service (CTS)	With CTS, you can record AS operation logs for viewing, auditing, and backtracking.	Log audit	Recording AS Resource Operations