3

我想通过client-go使用标签选择器列出我的 k8s 作业,如下所示:

$ kubectl get jobs -l 'hello-world in (London, China, NewYork)'

我查看了client-go的源代码,然后我写了一些这样的代码:

func listJobs(cli *kubernetes.Clientset) (*batchv1.JobList, error) {
    label := metav1.LabelSelector{
        MatchExpressions: []metav1.LabelSelectorRequirement{
            {
                Key:      "hello-world",
                Operator: metav1.LabelSelectorOpIn,
                Values: []string{
                    "London",
                    "China",
                    "NewYork",
                },
            },
        },
    }

    fmt.Println(label.String())

    return cli.BatchV1().Jobs("default").List(context.TODO(), metav1.ListOptions{
        LabelSelector: label.String(),
    })
}

然后我得到了错误:

&LabelSelector{MatchLabels:map[string]string{},MatchExpressions:[]LabelSelectorRequirement{LabelSelectorRequirement{Key:hello-world,Operator:In,Values:[London China NewYork],},},}
2021/01/28 17:58:07 unable to parse requirement: invalid label key "&LabelSelector{MatchLabels:map[string]string{}": name part must consist of alphanumeric characters, '-', '_' or '.', and must start and end with an alphanumeric character (e.g. 'MyName',  or 'my.name',  or '123-abc', regex used for validation is '([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9]')

我哪里做错了?如何使用复杂表达式的标签选择器列出我的作业?

4

1 回答 1

5

使用 Kubernetesclient-go库,您可以像使用kubectl.

写作hello-world in (London, China, NewYork)应该工作得很好。

func listJobs(cli *kubernetes.Clientset) (*batchv1.JobList, error) {
    return cli.BatchV1().Jobs("default").List(context.TODO(), metav1.ListOptions{
        LabelSelector: "hello-world in (London, China, NewYork)",
    })
}

但是,如果您想要hello-world in (London, China, NewYork)从编程对象动态生成,那是另一个问题,这里的 StackOverflow 已经回答了这个问题。

于 2021-01-28T10:36:44.423 回答