# AWS ROUTE53 設定

###### tags: `AWS 功能`

### 第一部分 : 購買 or 託管域名
* <b>直接購買</b> : 已註冊網域 -> 註冊網域 -> 選擇網域名稱 -> 購買 -> 顯示在 "託管區域"
* <b>託管</b> : 建立託管區域 -> 填寫網域資訊 -> 建立


### 第二部分 : 簡單路由設定
> * 配置標準 DNS 記錄
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )
* TXT record ( – 文字)

### 第三部分 : 地理位置路由設定
> * 根據使用者的地理位置 (DNS 查詢的來源位置) 選擇服務流量的資源
> * 要先設定預設
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )
* EXAMPLE
> 會優先倒到 "較近的位置"

### 第四部分 : 容錯移轉路由設定
> * 可以讓資源出現錯誤時將流量路由到正確的資源
> * 如果選擇主要則要選擇運作狀態檢查ID，次要可以不用
> * 需要設定 Healthchecks
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )
* EXAMPLE
> 會優先倒到 "主要" 設定，如果失敗才會倒到 "次要" 設定

### 第五部分 : 延遲路由設定
> * 選擇延遲最低的 AWS 區域處理使用者的請求，來幫助使用者提高效能
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )
* EXAMPLE
> 會優先倒到最接近的區域，已達到最低延遲

### 第六部分 : 頂級域名
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )
> 因為DNS協議不允許在頂級域名處定義CNAME，因此Route 53 也不允許給頂級域名創建CNAME。但是可以創建一個子域名指向頂級域名。
> 例如：www.wise-cdn.com CNAME wise-cdn.com

### 第七部分 : 萬用解析
* A record ( – IPv4 地址 )
* CNAME record ( – 域名 )

## 腳本
### 託管域名
* `aws route53 create-hosted-zone --name <DomainName> --caller-reference <Caller_Reference> --hosted-zone-config Comment="test version"`

#!/bin/bash
DomainName="www.example.com"
Caller_Reference="00000000"

Hosted_zone_ID=$(aws route53 create-hosted-zone --name "$DomainName" --caller-reference "$Caller_Reference" --hosted-zone-config Comment="test version" | jq -r '.HostedZone.Id' | cut -c 13-33) 

echo "$Hosted_zone_ID"

### 設定紀錄
* `aws route53 change-resource-record-sets --hosted-zone-id <hosted-zone-id> --change-batch file://<file_name>`

aws route53 change-resource-record-sets --hosted-zone-id Z051163617Q7R1OCQQL9M --change-batch file://record.json

### 簡單路由設定文件
* 規則

{
    "Comment": "SIMPLE",
        "Changes": [ {
            "Action": "CREATE"|"DELETE"|"UPSERT",
            "ResourceRecordSet": {
                "Name": "DNS domain name",
                "Type": "SOA"|"A"|"TXT"|"NS"|"CNAME"|"MX"|"PTR"|"SRV"|"SPF"|"AAAA",
                "TTL": time to live in seconds,
                "SetIdentifier": "string",
                "ResourceRecords": [{"Value": "<IP>"}]
            }
          }
        ]
}

* 範例

{
    "Comment": "SIMPLE",
        "Changes": [ {
            "Action": "CREATE",
            "ResourceRecordSet": {
                "Name": "a.wise-cdn.com",
                "Type": "A",
                "TTL": 300,
                "SetIdentifier": "string",
                "ResourceRecords": [{"Value": "192.169.0.108"}]
            }
        },
        {
            "Action": "CREATE",
            "ResourceRecordSet": {
                "Name": "b.wise-cdn.com",
                "Type": "CNAME",
                "TTL": 300,
                "ResourceRecords": [{"Value": "123.wise-cdn.com"}]
            }
        }
        ]
}

### 地理位置路由設定文件
* 規則

{
  "Comment": "GEOLOCATION",
  "Changes": [
    {
      "Action": "CREATE"|"DELETE"|"UPSERT",
      "ResourceRecordSet": {
        "Name": "DNS domain name",
        "Type": "SOA"|"A"|"TXT"|"NS"|"CNAME"|"MX"|"PTR"|"SRV"|"SPF"|"AAAA",
        "SetIdentifier": "string",
        "GeoLocation": {"CountryCode": "<CountryCode>"},
        "TTL": time to live in seconds,
        "ResourceRecords": [{"Value": "<IP>"}],
        "HealthCheckId": "<HealthCheckId>"
      }
    }
  ]
}

* 範例

{
  "Comment": "GEOLOCATION",
  "Changes": [
    {
      "Action": "CREATE",
      "ResourceRecordSet": {
        "Name": "testcli.wise-cdn.com",
        "Type": "A",
        "SetIdentifier": "test",
        "GeoLocation": {"CountryCode": "TW"},
        "TTL": 300,
        "ResourceRecords": [{"Value": "192.169.0.108"}],
        "HealthCheckId": "e4dbb08f-8e39-4d3f-940a-75d219608897"
      }
    }
  ]
}

### 容錯移轉路由設定文件
* 規則

{
    "Comment": "FAILOVER",
    "Changes": [
        {
            "Action": "CREATE"|"DELETE"|"UPSERT",
            "ResourceRecordSet": {
                "Name": "DNS domain name",
                "Type": "SOA"|"A"|"TXT"|"NS"|"CNAME"|"MX"|"PTR"|"SRV"|"SPF"|"AAAA",
                "TTL": time to live in seconds,
                "SetIdentifier": "test-primary",
                "Failover": "PRIMARY" | "SECONDARY" ,
                "ResourceRecords": [{"Value": "<IP>"}],
                "HealthCheckId": "<HealthCheckId>"
            }
        }
    ]
}

* 範例

{
    "Comment": "FAILOVER",
    "Changes": [
        {
            "Action": "CREATE",
            "ResourceRecordSet": {
                "Name": "testcli.wise-cdn.com.",
                "Type": "A",
                "TTL": 300,
                "SetIdentifier": "test-primary",
                "Failover": "PRIMARY",
                "ResourceRecords": [{"Value": "192.169.0.108"}],
                "HealthCheckId": "e4dbb08f-8e39-4d3f-940a-75d219608897"
            }
        }
    ]
}

### 延遲路由設定
* 規則

{
  "Comment": "LATENCY",
  "Changes": [
    {
      "Action": "CREATE"|"DELETE"|"UPSERT",
      "ResourceRecordSet": {
        "Name": "DNS domain name",
        "Type": "SOA"|"A"|"TXT"|"NS"|"CNAME"|"MX"|"PTR"|"SRV"|"SPF"|"AAAA",
        "SetIdentifier": "test",
        "Region": "Region name",
        "TTL": time to live in seconds,
        "ResourceRecords": [{"Value": "<IP>"}],
        "HealthCheckId": "<HealthCheckId>"
      }
    }
  ]
}

* 範例

{
  "Comment": "LATENCY",
  "Changes": [
    {
      "Action": "CREATE",
      "ResourceRecordSet": {
        "Name": "testcli.wise-cdn.com",
        "Type": "A",
        "SetIdentifier": "test",
        "Region": "ap-northeast-1",
        "TTL": 300,
        "ResourceRecords": [{"Value": "192.169.0.108"}],
        "HealthCheckId": "e4dbb08f-8e39-4d3f-940a-75d219608897"
      }
    }
  ]
}