go - 在 kubernetes client-go 中使用 kubectl context

Question

如何使用普通上下文来配置 kubernetes client-go？

    package kube

    import (
        "fmt"

        "k8s.io/client-go/kubernetes"
        "k8s.io/client-go/rest"
        "k8s.io/client-go/tools/clientcmd"
    )

    // GetKubeClient creates a Kubernetes config and client for a given kubeconfig context.
    func GetKubeClient(context string) (*rest.Config, kubernetes.Interface, error) {
        config, err := configForContext(context)
        if err != nil {
            return nil, nil, err
        }
        client, err := kubernetes.NewForConfig(config)
        if err != nil {
            return nil, nil, fmt.Errorf("could not get Kubernetes client: %s", err)
        }
        return config, client, nil
    }

    // configForContext creates a Kubernetes REST client configuration for a given kubeconfig context.
    func configForContext(context string) (*rest.Config, error) {
        config, err := getConfig(context).ClientConfig()
        if err != nil {
            return nil, fmt.Errorf("could not get Kubernetes config for context %q: %s", context, err)
        }
        return config, nil
    }

    // getConfig returns a Kubernetes client config for a given context.
    func getConfig(context string) clientcmd.ClientConfig {
        rules := clientcmd.NewDefaultClientConfigLoadingRules()
        rules.DefaultClientConfig = &clientcmd.DefaultClientConfig

        overrides := &clientcmd.ConfigOverrides{ClusterDefaults: clientcmd.ClusterDefaults}

        if context != "" {
            overrides.CurrentContext = context
        }
        return clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, overrides)
    }

如果我尝试这段代码(从 helm 获取)，api 服务器设置不正确，客户端想要连接到默认主机 localhost:8080。

Answer 1

发现问题。 github.com/imdario/mergo 的实现在较新版本中发生了变化，并破坏了生成客户端配置的实际行为。所以只使用修订版 6633656539c1639d9d78127b7d47c622b5d7b6dc 就像在官方 kubernetes cient-go 存储库中一样。

https://github.com/kubernetes/client-go/issues/415