k8s api-versions no matches

Posted 2023-04-18

参考技术A

错误如下：

k8s用api version管理配置中的各种对象，例如 Deployment 等，可以在 Which Kubernetes apiVersion Should I Use? 中查阅相关api对应的api version。
也可以在本机利用如下命令查询，当前K8s所支持的api-version:

查询后发现当前K8s不支持"apps/v1beta2"。启动minikube时可以看到本机kubernates版本为1.16.2，也可以直接用 kubectl version 查看client和server的版本。

在 k8s官方文档 中发现v1beta2.Deployment已经被标记为 DEPRECATED , 应该使用api/v1代替。将apiVersions改为api/v1，pod起动成功。

no matching function transform?

http://stackoverflow.com/questions/19876746/stdtolower-and-visual-studio-2013

http://forums.codeguru.com/showthread.php?489969-no-matching-function-transform

std::tolower is overloaded in C++, it‘s declared in <cctype> as

int tolower(int);

and also in <locale> as

template<CharT> CharT tolower(CharT, const locale&);

so when you say "std::tolower" you get an ambiguous(模糊不清的) reference to an overloaded function.

1. Why ::tolower version is working?

When you include <cctype> the one-argument overload is declared in namespace std and mightalso be declared in the global namespace, depending on the compiler. If you include <ctype.h> then it‘s guaranteed to be included in the global namespace, and ::tolower will work (although note Dietmar‘s points about when it‘s not safe). The two-argument overload from <locale> is never declared in the global namespace, so ::tolower never refers to the two-argument overload.

2. Why std::tolower is not working in std::transform?

See above, it‘s an overloaded name.