英文:
Openshift go-client api call panic out - "runtime error: invalid memory address or nil pointer dereference"
问题
我正在使用基本的Go代码来验证使用OpenShift API模块（https://github.com/openshift/api）在命名空间中创建的路由，但出现了恐慌错误。
以下是要翻译的代码：
package mainimport ("context""fmt"routev1 "github.com/openshift/api/route/v1""k8s.io/apimachinery/pkg/types""sigs.k8s.io/controller-runtime/pkg/client")func main() {const (namespace = "test"routeName = "nodejs-basic")var k8sClient client.Clientroute := &routev1.Route{}err := k8sClient.Get(context.TODO(), types.NamespacedName{Name: routeName, Namespace: namespace}, route)if err != nil {fmt.Println("Some issue")}fmt.Println("Api call completed")}
在执行时出现了恐慌错误：
panic: runtime error: invalid memory address or nil pointer dereference[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x10683e7]goroutine 1 [running]:main.main()/home/amit/go/src/github.com/amitkrout/usingopenshiftapi/route.go:22 +0x27exit status 2
有什么指针问题吗？可能的原因是什么，如何修复？
我已经创建了一个Git仓库-https://github.com/amitkrout/usingopenshiftapi。你也可以通过PR在该仓库中提出修复建议。
英文:
I am using a basic go code to verify the the route created in a namespace using OpenShift api module - https://github.com/openshift/api but it's panic out
$ cat route.go
package mainimport ("context""fmt"routev1 "github.com/openshift/api/route/v1""k8s.io/apimachinery/pkg/types""sigs.k8s.io/controller-runtime/pkg/client")func main() {const (namespace = "test"routeName = "nodejs-basic")var k8sClient client.Clientroute := &routev1.Route{}err := k8sClient.Get(context.TODO(), types.NamespacedName{Name: routeName, Namespace: namespace}, route)if err != nil {fmt.Println("Some issue")}fmt.Println("Api call completed")}
Panic out while executing it
$ go run route.go
panic: runtime error: invalid memory address or nil pointer dereference[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x10683e7]goroutine 1 [running]:main.main()/home/amit/go/src/github.com/amitkrout/usingopenshiftapi/route.go:22 +0x27exit status 2
Any pointer ? What could be the reason and how to fix it ?
I have created a git repo - https://github.com/amitkrout/usingopenshiftapi. You can propose the fix in the repo too via pr
答案1
得分: 1
你还没有初始化k8sClient，所以它是nil，调用k8sClient.Get()最终会导致空指针解引用。
获取客户端的一种方法是使用clientcmd；那里的文档展示了如何进行操作。
英文:
You haven’t initialised k8sClient, so it’s nil, and calling k8sClient.Get() ultimately results in a nil pointer dereference.
One way to get a client is to use clientcmd; the documentation there shows how to go about it.
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