首先祝各位以及未来的各位，甚至是之前的各位 2023.10.23 程序员节，节日快乐！

今日，做着fastapi的小项目的时候，用的远程数据库，下午时分测试api报错百思不得其解，怎么数据库连不上了，一看，好家伙，cloudcone要更换ip，在确认了四个实例更改ip之后，又花了十多分钟更改了我的所有域名到正确的位置。发现。美国cdn的ip迟迟无法访问。

在工单咨询过后，得到下面答复：

Hi there,

It seems like your server is having a Kernel Panic. Please try rebooting the server and adding SWAP memory to the server.
As the final resolution, a reinstallation would fix this issue. Please refer the article below to rebuild your instance and get back to us if you still face any issues :)

If the kernel panic happens due to low memory, you can choose an older OS like CentOS 6.5 which requires less RAM to operate

Rebuild Your Instance — https://help.cloudcone.com/en-us/article/rebuild-your-instance-16mho9i/

Regards,
Jaden

不过，我在扩展了内存之后：


Location    ISP TCP port check result
Canada, BC, Vancouver   Shaw    Connection to 74.48.34.49:22 failed
USA, CA, Fremont    Hurricane FMT2  Connection to 74.48.34.49:22 failed
USA, CA, Fremont    Linode  Connection to 74.48.34.49:22 failed
USA, CA, San Francisco  Digital Ocean   Connection to 74.48.34.49:22 failed
USA, CA, Los Angeles    Vultr   Connection to 74.48.34.49:22 failed
USA, CA, Los Angeles    RamNode Connection to 74.48.34.49:22 failed
USA, CA, Los Angeles    NetActuate  Connection to 74.48.34.49:22 failed
USA, WA, Seattle    Google  Connection to 74.48.34.49:22 failed
USA, WA, Seattle    RamNode Connection to 74.48.34.49:22 failed
USA, CO, Denver Cogent  Connection to 74.48.34.49:22 failed
USA, CO, Denver NetActuate  Connection to 74.48.34.49:22 failed
USA, TX, Dallas Softlayer   Connection to 74.48.34.49:22 failed
USA, TX, Dallas NetActuate  Connection to 74.48.34.49:22 failed
USA, IL, Chicago    Cogent  Connection to 74.48.34.49:22 failed
USA, IL, Chicago    NetActuate  Connection to 74.48.34.49:22 failed
USA, GA, Atlanta    RamNode Connection to 74.48.34.49:22 failed
USA, VA, Ashburn    NetActuate  Connection to 74.48.34.49:22 failed
USA, NY, New York   RamNode Connection to 74.48.34.49:22 failed
Canada, QC, Montreal    OVH Connection to 74.48.34.49:22 failed
Chile, Santiago NetActuate  Connection to 74.48.34.49:22 failed
Brazil, Sao Paulo   NetActuate  Connection to 74.48.34.49:22 failed
Spain, Madrid   NetActuate  Connection to 74.48.34.49:22 failed
UK, Manchester  NetActuate  Connection to 74.48.34.49:22 failed
UK, London  Cogent  Connection to 74.48.34.49:22 failed
France, Paris   Online.net  Connection to 74.48.34.49:22 failed
France, Paris   NetActuate  Connection to 74.48.34.49:22 failed
Netherlands, Amsterdam  Online.net  Connection to 74.48.34.49:22 failed

所以勒，我就当机立断，打算销毁美国cdn实例，平衡下来的，用于升级美国a和美国b区提供更好的服务。

所以，这既是一个坏消息，也是一个好消息了吧

最后修改：2023 年 10 月 24 日
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