January 2023
Intermediate to advanced
424 pages
11h 16m
Japanese
Content preview from AWSではじめるインフラ構築入門 第2版 安全で堅牢な本番環境のつくり方
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4.3 サブネットとアベイラビリティーゾーン
69
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
付録
4
サブネット内のリソース数
リソース数は、理論的な最大値からAWSが予約している5 つを引いたものとなっています。
一般的には、サブネット数とリソース数のそれぞれに余裕を持たせた設計がよいでしょ
う。本書では、VPC で16bit、サブネットで 4bit、合わせて20bitをサブネットのCIDR
ブロックのサブネットマスクとしました。そして、4つのサブネットをそれぞれ表4.3の
ように設計しています。
表4.3 本書のサブネットのCIDR設計
サブネット CIDRブロック
public01
00001010.00000000.0000XXXX.XXXXXXXX
（
10.0.0.0/20
）
public02
00001010.00000000.0001XXXX.XXXXXXXX
（
10.0.16.0/20
）
private01
00001010.00000000.0100XXXX.XXXXXXXX
（
10.0.64.0/20
）
private02
00001010.00000000.0101XXXX.XXXXXXXX
（
10.0.80.0/20
）
サブネットは最大16個作成できますが、ここではそのうちの4つを使います。サブ
ネット内には4091個のリソースを作成できるため、通常利用するには十分すぎる範囲と
なります。
作成内容
それでは、作成するサブネットを確認しましょう。本書のサンプルでは、以下の2つの
組み合わせで、合計4
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.