blocks|key|256431|text|您可以尝试其中一种dynamic+dns服务。它们允许您定义自己的主机名，如machine1.dyndns.org，并将其附加到IP地址。您可以运行一些脚本来使用EC2提供的动态IP地址更新dyndns解析器。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|256432|entityMap|0|LINK|mutability|MUTABLE|url|http://www.dyndns.com/^0|9|B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could try one of the <a href="http://www.dyndns.com/" rel="nofollow noreferrer">dynamic dns</a> services. These allow you to define your own host names such as machine1.dyndns.org and attach that to an IP address. There are scripts you can run to update the dyndns resolver with the dynamic IP address provided by EC2.

blocks|key|2883736|text|更好的办法是使用亚马逊的动态域名服务Route53：http://aws.amazon.com/documentation/route53/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2883737|entityMap|0|LINK|mutability|MUTABLE|url|http://aws.amazon.com/documentation/route53/^0|Q|18|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Even better would be to use Route53, which is Amazon's Dynamic DNS service: <a href="http://aws.amazon.com/documentation/route53/" rel="nofollow">http://aws.amazon.com/documentation/route53/</a>

blocks|key|256469|text|我真的不明白为什么你的客户在这里不使用弹性IP，也不使用弹性负载均衡器？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|256470|使用弹性IP，您可以在公共记录上保持一致的名称，然后在必要时使用elb+API脚本手动或编程更新与该弹性IP关联的EC2实例。|offset|length|style|BOLD|256471|使用弹性负载均衡器，您可以轻松地将一个活动节点连接到，然后可以通过编程方式删除/添加节点并相应地更新Route53。|256472|您可以使用内部机器的API来获取这些值(实例ID等)。用于引导脚本中的这些调用。|256473|entityMap^0|0|D|1E|0|0|9|Q|W|0|0|14|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@$D|X|E|Y|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|M|$]]

I don't really understand why your client wouldn't either use an Elastic IP here, or an Elastic Load Balancer? 

With an Elastic IP, you can keep a consistent name on your public DNS record and then manually or programmatically update the EC2 instance associated with that EIP whenever necessary using the elb API scripts.

With an Elastic Load Balancer, you could easily have just one active node attached to the ELB, and then could programmatically drop/add nodes and update Route53 accordingly.

You could use the internal machine's API to get the values (Instance ID, etc.) for these calls in a boostrap script.

blocks|key|1474942|text|这段代码获取您的ip，然后在route53中设置它。你必须提供变量DOMAIN和HOSTED_ZONE_ID，你可以在启动时运行它。如果您不想依赖ifconfig.co，那么可以这样做|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474943|DOMAIN="desired.domain.com"
HOSTED_ZONE_ID="..."

#+ANYWHERE,+but+relies+on+ifconfig.co
MYIP=$(curl+-s+ifconfig.co)

#+ON+EC2:
MYIP=$(curl+-s+curl+169.254.169.254/latest/meta-data/public-ipv4)

#+create+json+to+send+to+route53
cat+>+/tmp/actual_ip.json+<<EOF
{
++++++++"Comment":+"Update+the+A+record+set",
++++++++"Changes":+[
++++++++++++++++{
++++++++++++++++++++++++"Action":+"UPSERT",
++++++++++++++++++++++++"ResourceRecordSet":+{
++++++++++++++++++++++++++++++++"Name":+"$DOMAIN",
++++++++++++++++++++++++++++++++"Type":+"A",
++++++++++++++++++++++++++++++++"TTL":+300,
++++++++++++++++++++++++++++++++"ResourceRecords":+[
++++++++++++++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++++++++++++++++++"Value":+"$MYIP"
++++++++++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++++++++++]
++++++++++++++++++++++++}
++++++++++++++++}
++++++++]
}
EOF

#+update+the+dns+entry
if+!+/usr/local/bin/aws+route53+change-resource-record-sets+--hosted-zone-id+$HOSTED_ZONE_ID+--change-batch+file:///tmp/actual_ip.json;+then
++++echo+"error+calling+aws+$?"
fi|code-block|syntax|javascript|1474944|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This code gets your ip, and then sets it in route53. You have to provide the variables DOMAIN and HOSTED_ZONE_ID. You could run this at start up. If you don't want to rely on ifconfig.co, instead do

<pre><code>DOMAIN="desired.domain.com"
HOSTED_ZONE_ID="..."

# ANYWHERE, but relies on ifconfig.co
MYIP=$(curl -s ifconfig.co)

# ON EC2:
MYIP=$(curl -s curl 169.254.169.254/latest/meta-data/public-ipv4)

# create json to send to route53
cat &gt; /tmp/actual_ip.json &lt;&lt;EOF
{
 "Comment": "Update the A record set",
 "Changes": [
 {
 "Action": "UPSERT",
 "ResourceRecordSet": {
 "Name": "$DOMAIN",
 "Type": "A",
 "TTL": 300,
 "ResourceRecords": [
 {
 "Value": "$MYIP"
 }
 ]
 }
 }
 ]
}
EOF

# update the dns entry
if ! /usr/local/bin/aws route53 change-resource-record-sets --hosted-zone-id $HOSTED_ZONE_ID --change-batch file:///tmp/actual_ip.json; then
 echo "error calling aws $?"
fi
</code></pre>

I'm a long time developer but not very experienced with DNS. Here's my problem:

Our app launches servers on Amazon EC2 for clients. One client wants to use custom DNS's for every server launched instead of the normal long public DNS provided by AWS: for example server-5.demo.ourclient.com, server-6.demo.ourclient.com.

What's the easiest/cleanest/best way to solve this challenge from inside our application that launches the servers and knows the Amazon public DNS? We can probably get control of demo.ourclient.com as well....

Are there nice hosted solutions with API's? Would we need to manage a DNS server for *.demo.ourclient.com?

Thanks!

Chad

Programmatic DNS

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是一个长期的开发人员，但与DNS不是很有经验。这就是我的问题：我们的应用程序在亚马逊EC2上为客户端启动服务器。一个客户端希望为每个启动的服务器使用自定义DNS，而不是AWS提供的普通长公共DNS:例如server-5.demo.ourclient.com，server-6.demo.ourclient.com。从启动服务器并知道Amazon公共DNS的应用程序内部解决这一挑战的最简单/最干净/

问程序化DNS
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