AWS 在 eu-west-2 新增可用区 - 注意可能出现意外结果
看起来AWS今天在eu-west-2（伦敦）上线了一个新的可用区（AZ），但几乎没有任何宣传，甚至没有通知他们的支持团队。这个可用区被标识为eu-west-2d。目前没有AWS文档反映这一变化。
我想提醒一下使用该区域的用户，以防万一——在一个客户现场，这导致了一系列广泛的问题，主要是由于Terraform的失败等。根据你的代码库，资源可能会意外被拆除并重新创建。关于这是否应该给你带来问题可以有不同的看法，毕竟这是云服务，但我只是想尽量帮别人节省一些时间，免得他们困惑不已。
以下是相关的AWS命令：
```
aws ec2 describe-availability-zones --region eu-west-2 --all-availability-zones --query 'AvailabilityZones[].[ZoneName,ZoneID,ZoneType,State,OptInStatus,Messages]'
```
返回结果如下：
```
[
[
"eu-west-2a",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2b",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2c",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2d",
null,
null,
"available",
"opt-in-not-required",
[]
],
]
```
查看原文
It seems as though AWS have brought a new AZ online in eu-west-2 (London) today with very little fanfare or indeed without telling their support staff. It appears as eu-west-2d. No AWS docs yet reflect this change.<p>Wanted to give anyone who uses this region a heads up just in case - at a client site it has caused a widespread bunch of issues as a result of Terraform failures etc. Depending on your codebase resources might be torn down and recreated unexpectedly. You can argue the case for whether this should cause you issues or not given this is the cloud etc but I just wanted to try and save someone else some hours of head scratching.<p>aws ec2 describe-availability-zones --region eu-west-2 --all-availability-zones --query 'AvailabilityZones[].[ZoneName,ZoneID,ZoneTYpe,State,OptInStatus,Messages]'
[
[
"eu-west-2a",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2b",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2c",
null,
null,
"available",
"opt-in-not-required",
[]
],
[
"eu-west-2d",
null,
null,
"available",
"opt-in-not-required",
[]
],