ecs

1# AWS ECS
2 
3Amazon Elastic Container Service (ECS) is a fully managed container orchestration service. Run containers on AWS Fargate (serverless) or EC2 instances.
4 
5## Table of Contents
6 
7- [Core Concepts](#core-concepts)
8- [Common Patterns](#common-patterns)
9- [CLI Reference](#cli-reference)
10- [Best Practices](#best-practices)
11- [Troubleshooting](#troubleshooting)
12- [References](#references)
13 
14## Core Concepts
15 
16### Cluster
17 
18Logical grouping of tasks or services. Can contain Fargate tasks, EC2 instances, or both.
19 
20### Task Definition
21 
22Blueprint for your application. Defines containers, resources, networking, and IAM roles.
23 
24### Task
25 
26Running instance of a task definition. Can run standalone or as part of a service.
27 
28### Service
29 
30Maintains desired count of tasks. Handles deployments, load balancing, and auto scaling.
31 
32### Launch Types
33 
34| Type | Description | Use Case |
35|------|-------------|----------|
36| **Fargate** | Serverless, pay per task | Most workloads |
37| **EC2** | Self-managed instances | GPU, Windows, specific requirements |
38 
39## Common Patterns
40 
41### Create a Fargate Cluster
42 
43**AWS CLI:**
44 
45```bash
46# Create cluster
47aws ecs create-cluster --cluster-name my-cluster
48 
49# With capacity providers
50aws ecs create-cluster \
51  --cluster-name my-cluster \
52  --capacity-providers FARGATE FARGATE_SPOT \
53  --default-capacity-provider-strategy \
54    capacityProvider=FARGATE,weight=1 \
55    capacityProvider=FARGATE_SPOT,weight=1
56```
57 
58### Register Task Definition
59 
60```bash
61…