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Vargrant는 VM기술을 활용하여 OS선택하고 스펙을 정의할수 있으며 구축형일때  유용하게 활용할수 있습니다.

AWS 클라우드를 이용한다고 하면 EC2를 준비할수 있는단계와 동일합니다.

둘다 원하는 OS서버 스펙을 정의하고 제공받을수 있는 프로비저닝(Provisioning) 단계입니다.

Vagrant.configure("2") do |config|
  config.vbguest.auto_update = false
  config.vm.box = "kleesc/coreos"
  config.vm.hostname = "docker1"
  config.vm.network "private_network", ip: "192.168.56.201"
  config.vm.network "public_network", ip: "192.168.0.80"
  config.vm.provider "virtualbox" do |vb|
     vb.memory = "2048"
  end
end

다른 조합의 OS+Docker가 필요한경우 : https://app.vagrantup.com/boxes/search

OS의 Size는 곧 비용이다.  Core OS는 도커 가상화기술을 사용할수 있는 최적화된 경량화된 OS이다.   

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'kwilczynski/ubuntu-20.04-docker' could not be found. Attempting to find and install...
    default: Box Provider: virtualbox
    default: Box Version: >= 0
==> default: Loading metadata for box 'kwilczynski/ubuntu-20.04-docker'
    default: URL: https://vagrantcloud.com/kwilczynski/ubuntu-20.04-docker
==> default: Adding box 'kwilczynski/ubuntu-20.04-docker' (v0.1.1) for provider: virtualbox
    default: Downloading: https://vagrantcloud.com/kwilczynski/boxes/ubuntu-20.04-docker/versions/0.1.1/providers/virtualbox.box
Download redirected to host: vagrantcloud-files-production.s3-accelerate.amazonaws.com
    default: Calculating and comparing box checksum...
==> default: Successfully added box 'kwilczynski/ubuntu-20.04-docker' (v0.1.1) for 'virtualbox'!
==> default: Preparing master VM for linked clones...
    default: This is a one time operation. Once the master VM is prepared,
    default: it will be used as a base for linked clones, making the creation
    default: of new VMs take milliseconds on a modern system.
==> default: Importing base box 'kwilczynski/ubuntu-20.04-docker'...
==> default: Cloning VM...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'kwilczynski/ubuntu-20.04-docker' version '0.1.1' is up to date...
==> default: Setting the name of the VM: docker1_default_1682824169580_70976
==> default: Clearing any previously set network interfaces...
==> default: Available bridged network interfaces:
1) enp1s0f0
2) docker0
3) veth34ef55e
4) vetha664839
5) vethrd1950fa082
6) vethr9717e7bb98
7) vethr58070fba63
8) vethr05e74b7144
9) vethrad400661b5
10) vethr5b82529cc4
11) vethr2fc719c621
12) vethrf1bc8f62fc
13) vethre515607d4e
14) vethrb272d8eda7
15) vethr36b78e5a3f
16) vethr8d18704b7c
17) veth5575467
18) vethr01e0126ef1
==> default: When choosing an interface, it is usually the one that is
==> default: being used to connect to the internet.
==> default: 
    default: Which interface should the network bridge to? 1
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
    default: Adapter 2: bridged
==> default: Forwarding ports...
    default: 22 (guest) => 2222 (host) (adapter 1)
==> default: Running 'pre-boot' VM customizations...
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2222
    default: SSH username: vagrant
    default: SSH auth method: private key
    default: 
    default: Vagrant insecure key detected. Vagrant will automatically replace
    default: this with a newly generated keypair for better security.
    default: 
    default: Inserting generated public key within guest...
    default: Removing insecure key from the guest if it's present...
    default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
==> default: Setting hostname...
==> default: Configuring and enabling network interfaces...
==> default: Mounting shared folders...