This topic describes how to create a Global Traffic Manager (GTM) instance, enable GTM to distribute access traffic to two addresses, and configure the health check feature to achieve failover.
Procedure
You must create a GTM instance before you can access your application service by using GTM. GTM is available in Standard Edition and Ultimate Edition.
Authorize GTM to access cloud resources
If you are using GTM for the first time, you must authorize GTM to access your cloud resources. This allows GTM to access your alert groups that are created in Cloud Monitor.
NoteAuthorization is required only once for each Alibaba Cloud account. Skip this step if the authorization is completed.
GTM supports two types of access policies: Geographical Location-based Access Policy and Latency-based Access Policy. If you want to configure addresses to respond to the Domain Name System (DNS) requests from different Internet service providers (ISPs) or regions, you must create and configure geographical location-based access policies. If you want to intelligently route DNS requests to backend servers with the optimal network performance based on the network latency from request sources to the regions to which addresses belong, you must create and configure latency-based access policies.
When you use GTM to manage application addresses, you must create an address pool for the addresses. The information that you must configure includes Address Pool Name, Address Pool Type, Load Balancing Policy(Address), and Addresses.
Enable the health check feature
After you enable the health check feature, you can monitor the availability of your application service in real time. Available health check types include ping-based health checks, TCP health checks, and HTTP or HTTPS health checks.
You can configure basic settings for your GTM instance. The basic settings include Instance Name, CNAME Access Type, Global TTL Period, and Alert Group.
Connect a business domain name to GTM by using a CNAME
After the GTM service is configured and passes the test, you must point the business domain name of your application service to the CNAME configured in GTM by using a CNAME record. This way, the application service can access GTM.