层次关系

Hierarchy

There are several different levels for monitoring:

• Overview: Global views about all instances and clusters among current environment.
• Shard: A brunch of clusters that are horizontal split to serve same business
• Cluster: Basic autonomous unit. Have a designated name (such as pg-test-tt) that reflect business, and used as namespace. which usually consist of multiple database instances, contains multiple nodes, and two typical serivce: <cluster>-primary (read-write) and <cluster>-replica (read-only).
• Service: Service is an abstraction on addressible server
• Instance: A specific database server, could be single process, a brunch of processes, or multiple containers in a pod.
• Database: A database instance/cluster may have one or more database
• Table/Query : In-Database object monitoring

Basic Facts

• Cluster is the minimal autonomous unit
• Cluster contain nodes (1:n)
• Cluster include services (1:2)
• Cluster consist of instances (1:n)
• Service resolve/route to instance (1:n)
• Instances deployed on nodes (1:1 or n:1)

Hierarchy of Dashboards

Hierarchy of Metrics