Grafana ECS Service CloudWatch Dashboard

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本文缩写（英文全称与中文含义）

缩写	英文全称／名称	中文含义
ALB	Application Load Balancer	应用负载均衡器
AWS	Amazon Web Services	亚马逊云服务
ECS	Elastic Container Service	AWS 容器编排服务
HTTP	Hypertext Transfer Protocol	超文本传输协议

Links#

1. Dashboard Rows#

ECS desired/running task、CPU、memory 说明资源与调度状态；HTTP 请求量、错误率、延迟须结合 ALB 或应用指标。

Row	CloudWatch Metrics	Statistic	Display
Overview	`RunningTaskCount`, `DesiredTaskCount`	Average	stat / time series by service
Overview	`CPUUtilization`	Average	time series by service
Overview	`MemoryUtilization`	Average	time series by service
Overview, if HTTP behind ALB	ALB `RequestCount`	Sum	request rate
Overview, if HTTP behind ALB	ALB `HTTPCode_Target_5XX_Count`, `HTTPCode_ELB_5XX_Count`	Sum	target error and ALB-layer error
Overview, if HTTP behind ALB	ALB `TargetResponseTime`	p95 / p99	request latency
Drilldown	`PendingTaskCount`	Average	time series by service
Drilldown	`PendingTaskCount` from `ECS/ContainerInsights`	Average	deployment blocked / capacity shortage signal
Capacity	`DesiredTaskCount`, `RunningTaskCount`	Average	trend
Debug	service-level pending / running task count	Average	deployment troubleshooting
Debug	`PendingTaskCount` with service events and logs	Average	deployment / scheduling / capacity issue investigation

2. Notes#

ECS CloudWatch metrics 只能说明 service / task 资源状态。

ECS namespace:
    CPUUtilization
    MemoryUtilization
    RunningTaskCount
    DesiredTaskCount
    PendingTaskCount
    PendingTaskCount, from ECS/ContainerInsights

ALB metrics, if service is HTTP behind ALB:
    RequestCount
    HTTPCode_Target_5XX_Count
    HTTPCode_ELB_5XX_Count
    TargetResponseTime

App metrics, recommended:
    http_requests_total
    http_request_duration_seconds
    error counter by route / status / exception

结论:
    可以从 CloudWatch 看 request / error / latency，但通常不是 ECS namespace。
    如果服务 behind ALB，就看 AWS/ApplicationELB。
    如果要看真正应用级 request / error / latency，最好应用自己暴露 Prometheus metrics。