AWS ECS – Page 2 – ソフトウェアエンジニアの技術ブログ：Software engineer tech blog

AWS ECSを始める

ECSとはDockerを簡単に実行、停止、管理できるサービス

management console ECS

Task Definition
create task definition -> EC2 -> json

{
  "family": "myContainer",
  "containerDefinitions": [
    {
      "volumesFrom": [],
      "portMappings": [
        {
          "hostPort": 80,
          "containerPort": 80
        }
      ],
      "command": null,
      "environment": [],
      "essential": true,
      "entryPoint": null,
      "links": [],
      "mountPoints": [
        {
          "containerPath": "/usr/local/apache2/htdocs",
          "sourceVolume": "my-vol",
          "readOnly": null
        }
      ],
      "memory": 300,
      "name": "simple-app",
      "cpu": 10,
      "image": "httpd:2.4"
    },
    {
      "volumesFrom": [
        {
          "readOnly": null,
          "sourceContainer": "simple-app"
        }
      ],
      "portMappings": [],
      "command": [
        "/bin/sh -c \"while true; do echo '<html> <head> <title>Amazon ECS Sample App</title> <style>body {margin-top: 40px; background-color: #333;} </style> </head><body> <div style=color:white;text-align:center> <h1>Amazon ECS Sample App</h1> <h2>Congratulations!</h2> <p>Your application is now running on a container in Amazon ECS.</p>' > top; /bin/date > date ; echo '</div></body></html>' > bottom; cat top date bottom > /usr/local/apache2/htdocs/index.html ; sleep 1; done\""
      ],
      "environment": [],
      "essential": false,
      "entryPoint": [
        "sh",
        "-c"
      ],
      "links": [],
      "mountPoints": [],
      "memory": 200,
      "name": "busybox",
      "cpu": 10,
      "image": "busybox"
    }
  ],
  "volumes": [
    {
      "host": {
        "sourcePath": null
      },
      "name": "my-vol"
    }
  ]
}

create

### Cluster
ECS Cluster -> Create
Launch type: EC2

Jsonでupdateできる。
とりあえず触ってみたという感じか。

Getting startedでECSを触ってみる

DockerのECSプラグインを使う

ECS PluginはDockerの拡張機能
ECSのFargate上にデプロイすることができる

$ git clone https://github.com/docker/ecs-plugin.git
$ cd ecs-plugin/example/
$ docker build app -t example
$ docker images –filter reference=example
REPOSITORY TAG IMAGE ID CREATED SIZE
example latest 31ac32e7e8dd 18 seconds ago 52.9MB

$ docker run -t -i -p 5000:5000 example

OK(※redisが起動していない為)

### AWS ECS
DockerHubの様なもの
作成したDockerイメージをECRにpushし、docker-compose使用時にpull
$ docker context use default
$ docker context ls

### ECS用のIAM作成
こちらを参考にECSのユーザを作成する
https://docs.aws.amazon.com/ja_jp/AmazonECR/latest/userguide/get-set-up-for-amazon-ecr.html
accound_id, access_key_id, secret_access_keyをメモ

### AWS CLI install
$ dnf install python3-pip
$ pip3 install awscli –upgrade –user
$ aws –version
aws-cli/1.19.28 Python/3.6.8 Linux/4.18.0-193.19.1.el8_2.x86_64 botocore/1.20.2
$ aws configure
-> Administratorのaccess_key_id, secret_access_keyと ap-northeast-1を入力

$ timedatectl set-timezone Asia/Tokyo

$ aws ecr get-login-password –region ap-northeast-1 | docker login –username AWS –password-stdin hoge.dkr.ecr.ap-northeast-1.amazonaws.com
Login Succeeded

// レポジトリ作成
$ aws ecr create-repository \
–repository-name example \
–image-scanning-configuration scanOnPush=true \
–region ap-northeast-1
// タグ付け
$ docker tag example:latest hoge.dkr.ecr.ap-northeast-1.amazonaws.com/example:latest
// imageをpush
$ docker push hoge.dkr.ecr.ap-northeast-1.amazonaws.com/example:latest
$ aws ecr list-images –repository-name example
{
“imageIds”: [
{
“imageDigest”: “sha256:75260261d397dd588f43bd4fc16118cb2763c55c46caa313a9a2caf0202636f9”,
“imageTag”: “latest”
}
]
}