如何通过指定自定义属性值来获取部​​署（$ kubectl获取部署）？

Question

我已经部署了Kubernetes服务，当我查询以获取部署$ kubectl get deployments时，可以看到部署。 部署的json如下所示

apiVersion: v1
kind: Deployment
metadata:
 name: test
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: test
        release: testRelease
        customProp: xyz

我的问题是，如何通过指定'customProp'值来构成一个查询，以获取部署。 kubectl是否支持在查询中传递jsonpath？这样我就可以传递json之类的jsonpath='{$.spec.template.metadata.labels.customProp}'路径，并以'xyz'的形式对此JSONPath赋值。

这就是我要执行的操作：

$ kubectl get deployments -n <namespace> <json path query>

但是不确定如何构造json路径查询并与$kubectl get deployments一起传递。

Answer 1

Kubectl确实支持query feature，您可以在下面的查询中使用

kubectl get pods --selector=customProp=xyz

Kubectl也支持JSON路径表达式，要获取更多详细信息，请遵循link。您可以按照链接上显示的语法编写查询。

Answer 2

是的，可以使用jsonpath向class customPin: NSObject, MKAnnotation { var coordinate: CLLocationCoordinate2D var title: String? var subtitle: String? init(pinTitle:String, pinSubTitle:String, location:CLLocationCoordinate2D) { self.title = pinTitle self.subtitle = pinSubTitle self.coordinate = location } } var mapView: MKMapView! var locationManager = CLLocationManager() override func viewDidLoad() { super.viewDidLoad() let location = CLLocationCoordinate2D(latitude: 32.2325, longitude:76.3242) let region = MKCoordinateRegion(center: location, span: MKCoordinateSpan(latitudeDelta: 0.005, longitudeDelta: 0.005)) self.mapView.setRegion(region, animated: true) let pin = customPin(pinTitle: "Honory Dalailama Temple", pinSubTitle: "Dharamshala, Himachal Pradesh, India", location: location) self.mapView.addAnnotation(pin) self.mapView.delegate = self } func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? { if annotation is MKUserLocation { return nil } let annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "customannotation") annotationView.image = UIImage(named:"pin") annotationView.canShowCallout = true return annotationView } func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) { print("annotation title == \(String(describing: view.annotation?.title!))") } fileprivate func setupLocationManager() {self.locationManager.requestWhenInUseAuthorization() if CLLocationManager.locationServicesEnabled() == true { if CLLocationManager.authorizationStatus() == .restricted || CLLocationManager.authorizationStatus() == .denied || CLLocationManager.authorizationStatus() == .notDetermined { locationManager.requestWhenInUseAuthorization() } locationManager.desiredAccuracy = 1.0 locationManager.delegate = self locationManager.startUpdatingLocation() } else { print("PLease turn on location services or GPS") } } fileprivate func setupMapView() { let mView = MKMapView(frame: CGRect(x: 0, y: 20, width: view.frame.width, height: view.frame.height)) mView.showsUserLocation = true view.addSubview(mView) mView.showsScale = true mView.showsPointsOfInterest = true mView.showsTraffic = true mView.showsCompass = true mView.userTrackingMode = .follow self.mapView = mView } 查询资源。运行以下命令以获取所需内容：

kube-apiserver

有关更多用法，请参见https://kubernetes.io/docs/reference/kubectl/jsonpath。

Answer 3

为部署对象添加标签。然后使用下面的命令查询特定的部署
kubectl获取部署-l labelname = labelvalue