mirror of https://github.com/k3s-io/k3s
74 lines
2.5 KiB
Go
74 lines
2.5 KiB
Go
|
/*
|
||
|
|
Copyright 2015 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package container
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"k8s.io/api/core/v1"
|
||
|
|
ref "k8s.io/client-go/tools/reference"
|
||
|
|
"k8s.io/kubernetes/pkg/api/legacyscheme"
|
||
|
|
)
|
||
|
|
|
||
|
|
var ImplicitContainerPrefix string = "implicitly required container "
|
||
|
|
|
||
|
|
// GenerateContainerRef returns an *v1.ObjectReference which references the given container
|
||
|
|
// within the given pod. Returns an error if the reference can't be constructed or the
|
||
|
|
// container doesn't actually belong to the pod.
|
||
|
|
//
|
||
|
|
// This function will return an error if the provided Pod does not have a selfLink,
|
||
|
|
// but we expect selfLink to be populated at all call sites for the function.
|
||
|
|
func GenerateContainerRef(pod *v1.Pod, container *v1.Container) (*v1.ObjectReference, error) {
|
||
|
|
fieldPath, err := fieldPath(pod, container)
|
||
|
|
if err != nil {
|
||
|
|
// TODO: figure out intelligent way to refer to containers that we implicitly
|
||
|
|
// start (like the pod infra container). This is not a good way, ugh.
|
||
|
|
fieldPath = ImplicitContainerPrefix + container.Name
|
||
|
|
}
|
||
|
|
ref, err := ref.GetPartialReference(legacyscheme.Scheme, pod, fieldPath)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
return ref, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// fieldPath returns a fieldPath locating container within pod.
|
||
|
|
// Returns an error if the container isn't part of the pod.
|
||
|
|
func fieldPath(pod *v1.Pod, container *v1.Container) (string, error) {
|
||
|
|
for i := range pod.Spec.Containers {
|
||
|
|
here := &pod.Spec.Containers[i]
|
||
|
|
if here.Name == container.Name {
|
||
|
|
if here.Name == "" {
|
||
|
|
return fmt.Sprintf("spec.containers[%d]", i), nil
|
||
|
|
} else {
|
||
|
|
return fmt.Sprintf("spec.containers{%s}", here.Name), nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for i := range pod.Spec.InitContainers {
|
||
|
|
here := &pod.Spec.InitContainers[i]
|
||
|
|
if here.Name == container.Name {
|
||
|
|
if here.Name == "" {
|
||
|
|
return fmt.Sprintf("spec.initContainers[%d]", i), nil
|
||
|
|
} else {
|
||
|
|
return fmt.Sprintf("spec.initContainers{%s}", here.Name), nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return "", fmt.Errorf("container %#v not found in pod %#v", container, pod)
|
||
|
|
}
|