AS and Other Services

In addition to scaling resources, AS can work with other cloud services to meet your requirements in various scenarios.

Figure 1 shows the relationships between AS and other services.

Figure 1 Relationships between AS and other services

**Table 1** Related services
Service Name	Description	Function	Reference
Elastic Load Balance (ELB)	After ELB is configured, AS automatically binds ECSs to a load balancer listener when adding ECSs, and unbinds ECSs from the load balancer listener when removing ECSs.	AS 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 triggering condition specified in Cloud Eye is met.	AS scales resources based on ECS status monitored by Cloud Eye.	AS metrics
Elastic Cloud Server (ECS)	ECSs added in a scaling action can be managed and maintained on the ECS console.	AS automatically adjusts the number of ECSs.	Dynamically Expanding Resources and Expanding Resources as Planned
Virtual Private Cloud (VPC)	AS automatically adjusts the bandwidths of EIPs assigned in VPCs and also shared bandwidths.	AS automatically adjusts the bandwidth.	Creating a Bandwidth Scaling Policy
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 view, audit, and backtracking.	Log audit	Recording AS Resource Operations
Tag Management Service (TMS)	If you have multiple resources of the same type, TMS enables you to manage these resources easily.	Tags	Marking AS Groups and Instances
Relational Database Service	The prerequisites for directly accessing an RDS DB instance from a scaled instance are as follows: The scaled instance and the destination RDS DB instance must be in the same VPC. The scaled instance must be allowed by the security group to access RDS DB instances.	The scaled instances can access RDS DB instances.	Connecting to a DB Instance Through a Private Network