先放出无门槛注册地址：planetscale.com
下面是一个简要的注册步骤。
步骤 1 注册并验证 email 地址
步骤 2 进入控制台
Deploy a fully managed database with the reliability of MySQL and the scale of open source Vitess in just ten seconds. Built-in connection pooling means you’ll never run into connection limits for your database.
号称可以数秒中开通一个 mysql 兼容的，客户全面管理的，没有连接数限制的云数据库
声称支持灵活的 schema 。
步骤 3 开始创建数据库
遇到这个页面后，可以自建数据，也可以导入一个现成的数据库。
步骤 4 选择所在的区域
根据页面提示，可以选择我们喜欢的 aws 东京区域
选择后确定，可以耐心等待数据库创建成功
步骤 5 连接访问数据库
根据文档，planetscale 提供了各种方式去连接 mysql
我们测试以下 mysql 命令行的方式去连接。
需要注意的：首先需要去密码管理生成一个用户名+密码，密码需要记录下来，不要忘记保存，其次，mysql 连接需要提供 ssl-ca 证书。找到 ca 证书后，你可以使用这样的链接命令行工具去连数据库。
mysql -h ap-northeast.connect.psdb.cloud -u xxxx -p'pscale_xxxx' --ssl-ca=/etc/pki/tls/certs/ca-bundle.crt dbtokyo
CA 证书的路径，放在文章最后供你参考。
简单总结，Planetscale 是一个非常值得推荐使用的云 mysql 数据库。免费套餐提供了 5G 的数据库存储，足够的读写次数；提供了 aws 东京区域的 node ，非常值得中国大陆用户选择，如果你使用的是 aws 的 vps 更是值得考虑；提供了 mysql 数据库的监控、备份（一天一次）等服务，如果你的服务非常关键，需要考虑数据库的安全性，对于免费用户也有良好的备份服务，那是非常有诚意。
更新使用经验和更新参考： https://zhuji188.com/805.html
附上免费套餐的参数: 1000w 写 /月 10 亿 /读 5G 存储。
收费的套餐
On Linux, the path to the system CA roots depends on the distribution that you are using.
Debian / Ubuntu / Gentoo / Arch / Slackware
This path also applies to Debian or Ubuntu derivatives. You need to make sure the ca-certificates package is installed.
Copied
/etc/ssl/certs/ca-certificates.crt
RedHat / Fedora / CentOS / Mageia / Vercel / Netlify
This path also applies to RedHat or Fedora derivatives like Amazon Linux and Oracle Linux. This is the path to use for applications deployed on Vercel and Netlify.
Copied
/etc/pki/tls/certs/ca-bundle.crt
Alpine
This is a commonly used distribution for Docker containers.
Copied
/etc/ssl/cert.pem
OpenSUSE
This also applies to OpenSUSE derivatives.
Copied
/etc/ssl/ca-bundle.pem
MacOS / FreeBSD / OpenBSD
MacOS provides an extracted version of the system roots on disk that can be used for the CA roots. On FreeBSD you need to install the ca_root_nss package for this path to be available.
Copied
/etc/ssl/cert.pem
Windows
Windows does not provide a file with the CA roots that can be used by your driver. Many languages often used on Windows like C#, Java or Go do not need the CA root path and will use the Windows internal system roots by default. In those environments, you don't need to specify a root CA list.
If you are using a language that requires specifying the CA root path, like C or PHP, the curl project provides an extracted bundle of root certificates from the Mozilla CA Certificate program. You can download the bundle at https://curl.se/docs/caextract.html. Once you download the file, you can point at it with the correct configuration options for the driver that you are using.
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