Introduction

First thing to note: the service name is “Elastic Beanstalk” - I tend to write it as “ElasticBeanStalk” or “Elastic Bean Stalk” so let me start there.

Rough Notes

A service for automating the setup of standard configurations and application deployments
Components
- Application
  - Top-level logical unit
  - Contains versions, environments, and environment configurations
- Version
  - Deployable code
  - Version management on S3
  - Can deploy different versions to different environments
- Environment
  - Infrastructure built for each environment
  - Deploy a version (source code)
    - Example Web server environment: ELB + EC2 (where code is deployed)
- Environment Configuration
  - Configuration parameters that define the behavior of resources associated with the environment
    - Examples: EC2 instance type, Auto Scaling settings, etc.
Environment Types
- Load Balancing, Auto Scaling Environments
  - Run scalable web applications
    - High availability and elasticity
    - Web server environment: ELB + Auto Scaling
    - Worker environment: SQS + Auto Scaling
- Single Instance Environments
  - For running batch applications
    - Single EC2 instance (Auto Scaling Max 1, Min 1)

EB CLI

Installation

[ec2-user@bastin ~]$ sudo pip3 install --upgrade awsebcli
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Collecting awsebcli
  Downloading awsebcli-3.19.2.tar.gz (249 kB)
     |████████████████████████████████| 249 kB 14.3 MB/s
Collecting botocore<1.20.0,>=1.19.0

Download Sample Code

[ec2-user@bastin ~]$ git clone https://github.com/aws-samples/eb-node-express-sample.git
Cloning into 'eb-node-express-sample'...
remote: Enumerating objects: 8, done.
remote: Counting objects: 100% (8/8), done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 111 (delta 0), reused 2 (delta 0), pack-reused 103
Receiving objects: 100% (111/111), 269.62 KiB | 496.00 KiB/s, done.
Resolving deltas: 100% (34/34), done.

Create an Elastic Beanstalk Application

[ec2-user@bastin eb-node-express-sample]$ eb init

Select a default region
1) us-east-1 : US East (N. Virginia)
2) us-west-1 : US West (N. California)
3) us-west-2 : US West (Oregon)
4) eu-west-1 : EU (Ireland)
5) eu-central-1 : EU (Frankfurt)
6) ap-south-1 : Asia Pacific (Mumbai)
7) ap-southeast-1 : Asia Pacific (Singapore)
8) ap-southeast-2 : Asia Pacific (Sydney)
9) ap-northeast-1 : Asia Pacific (Tokyo)
10) ap-northeast-2 : Asia Pacific (Seoul)
11) sa-east-1 : South America (Sao Paulo)
12) cn-north-1 : China (Beijing)
13) cn-northwest-1 : China (Ningxia)
14) us-east-2 : US East (Ohio)
15) ca-central-1 : Canada (Central)
16) eu-west-2 : EU (London)
17) eu-west-3 : EU (Paris)
18) eu-north-1 : EU (Stockholm)
19) eu-south-1 : EU (Milano)
20) ap-east-1 : Asia Pacific (Hong Kong)
21) me-south-1 : Middle East (Bahrain)
22) af-south-1 : Africa (Cape Town)
(default is 3): 9


Select an application to use
1) bel-dev-beanstalk-test
2) [ Create new Application ]
(default is 2):


Enter Application Name
(default is "eb-node-express-sample"):
Application eb-node-express-sample has been created.

It appears you are using Node.js. Is this correct?
(Y/n): y
Select a platform branch.
1) Node.js 12 running on 64bit Amazon Linux 2
2) Node.js 10 running on 64bit Amazon Linux 2
3) Node.js running on 64bit Amazon Linux
(default is 1):

Do you wish to continue with CodeCommit? (Y/n): n
Do you want to set up SSH for your instances?
(Y/n): y

Select a keypair.
1) awskeypair
2) DMSHandson58
3) [ Create new KeyPair ]
(default is 2): 1

[ec2-user@bastin eb-node-express-sample]$

Create Environment and Deploy Code

[ec2-user@bastin eb-node-express-sample]$ eb create
Enter Environment Name
(default is eb-node-express-sample-dev):
Enter DNS CNAME prefix
(default is eb-node-express-sample-dev):

Select a load balancer type
1) classic
2) application
3) network
(default is 2):

Would you like to enable Spot Fleet requests for this environment? (y/N): N
～omitted～

Deployment

Deployment policies and settings - AWS Elastic Beanstalk https://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/using-features.rolling-version-deploy.html
- In Place Deployment (Rolling Deploy)
  - Uses instances from the current environment and applies new revision code
    - at once
    - Rolling
- Blue/Green Deployment
  - Apply new revision code to new instances and swap the instances themselves
- Deployment Configuration
  - Batch type: Number of instances to deploy at once
    - Percentage, fixed
  - Batch size: Number or percentage of instances to deploy in each batch
- URL Swap
  - Deploy one version of an application, then deploy a new version as a different environment. Achieve Blue/Green Deployment by switching CNAMEs.
    
    Trying out Elastic Beanstalk CNAME Swap | Developers.IO https://dev.classmethod.jp/articles/beanstalk-cname-swap/
- Route53 Weighted Round Robin
  - Allows gradually testing new version code
Environment Configuration Customization
- Specify options directly when creating the environment
- Saved configurations
  - Save as configuration file in S3
    - eb config save
- .ebextensions
  - Allows resource customization
    - Custom environment variables
    - Software installation
    - Software execution
    - Creating AWS resources not available by default
Monitoring
- Basic health reporting
  - Environment health status
  - ELB health checks
  - CloudWatch metrics
- Enhanced health reporting
  - OS-level metrics
  - Application-level metrics

Rough Notes on AWS Elastic Beanstalk

Introduction

Rough Notes

Related articles