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,然后写了一些代码,如下所示:
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]')
我哪里错了?如何使用复杂表达式的标签选择器列出作业?
发布于 2021-01-28 18:36:44
使用Kubernetes client-go
库,您可以像使用kubectl
一样编写标签选择器。
编写hello-world in (London, China, NewYork)
应该可以很好地工作。
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,如果您想要的是从编程式对象动态生成hello-world in (London, China, NewYork)
,那就是另一个问题了,StackOverflow here已经回答了这个问题。
https://stackoverflow.com/questions/65934853
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