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chore(kb/aws/ecs): add section about autoscaling

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Michele Cereda
2025-05-15 07:40:34 +02:00
parent 6b27607545
commit e9bff96f47
1 changed files with 29 additions and 4 deletions
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knowledge base/cloud computing/aws/ecs.md
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@@ -14,14 +14,16 @@
1. [Docker volumes](#docker-volumes)
1. [Bind mounts](#bind-mounts)
1. [Execute commands in tasks' containers](#execute-commands-in-tasks-containers)
1. [Scale the number of tasks automatically](#scale-the-number-of-tasks-automatically)
1. [Target tracking](#target-tracking)
1. [Allow tasks to communicate with each other](#allow-tasks-to-communicate-with-each-other)
1. [ECS Service Connect](#ecs-service-connect)
1. [ECS service discovery](#ecs-service-discovery)
1. [VPC Lattice](#vpc-lattice)
1. [Scrape metrics using Prometheus](#scrape-metrics-using-prometheus)
1. [Send logs to a central location](#send-logs-to-a-central-location)
1. [FireLens](#firelens)
1. [Fluent Bit or Fluentd](#fluent-bit-or-fluentd)
1. [FireLens](#firelens)
1. [Fluent Bit or Fluentd](#fluent-bit-or-fluentd)
1. [Troubleshooting](#troubleshooting)
1. [Invalid 'cpu' setting for task](#invalid-cpu-setting-for-task)
1. [Further readings](#further-readings)
@@ -606,7 +608,6 @@ Procedure:
```plaintext
The Session Manager plugin was installed successfully. Use the AWS CLI to start a session.
Starting session with SessionId: ecs-execute-command-zobkrf3qrif9j962h9pecgnae8
Filesystem Size Used Avail Use% Mounted on
overlay 31G 12G 18G 40% /
@@ -618,7 +619,6 @@ Procedure:
tmpfs 464M 0 464M 0% /proc/acpi
tmpfs 464M 0 464M 0% /sys/firmware
Exiting session with sessionId: ecs-execute-command-zobkrf3qrif9j962h9pecgnae8.
```
@@ -636,6 +636,26 @@ Logging options are configured at the ECS cluster level.<br/>
The task's role **will** need to have IAM permissions to log the output to S3 and/or CloudWatch should the cluster be
configured for the above options. If the options are **not** configured, then the permissions are **not** required.
## Scale the number of tasks automatically
Refer [Automatically scale your Amazon ECS service].
Scaling**_out_** **increases** the number of tasks, scaling-**_in_** **decreases** it.
ECS sends metrics in **1-minute intervals** to CloudWatch.<br/>
Keep this in mind when tweaking the values for scaling.
### Target tracking
Refer [Target tracking scaling policies for Application Auto Scaling] and
[How target tracking scaling for Application Auto Scaling works].
The **only** available metrics for the integrated checks are currently:
- The service's **average** CPU utilization (`ECSServiceCPUUtilization`) for the last minute.
- The service's **average** memory utilization (`ECSServiceMemoryUtilization`) for the last minute.
- The service's Application Load Balancer's **average** requests count (`ALBRequestCountPerTarget`) for the last minute.
## Allow tasks to communicate with each other
Refer [How can I allow the tasks in my Amazon ECS services to communicate with each other?] and
@@ -1198,6 +1218,7 @@ Specify a supported value for the task CPU and memory in your task definition.
- [How can I allow the tasks in my Amazon ECS services to communicate with each other?]
- [Interconnect Amazon ECS services]
- [Amazon ECS Service Discovery]
- [AWS Fargate Pricing Explained]
<!--
Reference
@@ -1255,12 +1276,16 @@ Specify a supported value for the task CPU and memory in your task definition.
[using amazon ecs exec to access your containers on aws fargate and amazon ec2]: https://aws.amazon.com/blogs/containers/new-using-amazon-ecs-exec-access-your-containers-fargate-ec2/
[What is Amazon VPC Lattice?]: https://docs.aws.amazon.com/vpc-lattice/latest/ug/what-is-vpc-lattice.html
[What Is AWS Cloud Map?]: https://docs.aws.amazon.com/cloud-map/latest/dg/what-is-cloud-map.html
[Automatically scale your Amazon ECS service]: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-auto-scaling.html
[Target tracking scaling policies for Application Auto Scaling]: https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-target-tracking.html
[How target tracking scaling for Application Auto Scaling works]: https://docs.aws.amazon.com/autoscaling/application/userguide/target-tracking-scaling-policy-overview.html
<!-- Others -->
[`aws ecs execute-command` results in `TargetNotConnectedException` `The execute command failed due to an internal error`]: https://stackoverflow.com/questions/69261159/aws-ecs-execute-command-results-in-targetnotconnectedexception-the-execute
[308 Permanent Redirect]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status/308
[a step-by-step guide to enabling amazon ecs exec]: https://medium.com/@mariotolic/a-step-by-step-guide-to-enabling-amazon-ecs-exec-a88b05858709
[attach ebs volume to aws ecs fargate]: https://medium.com/@shujaatsscripts/attach-ebs-volume-to-aws-ecs-fargate-e23fea7bb1a7
[AWS Fargate Pricing Explained]: https://www.vantage.sh/blog/fargate-pricing
[aws-cloudmap-prometheus-sd]: https://github.com/awslabs/aws-cloudmap-prometheus-sd
[Effective Logging Strategies with Amazon ECS and Fluentd]: https://reintech.io/blog/effective-logging-strategies-amazon-ecs-fluent
[exposing multiple ports for an aws ecs service]: https://medium.com/@faisalsuhail1/exposing-multiple-ports-for-an-aws-ecs-service-64b9821c09e8