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Add pod util for extracting referenced configmaps

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This commit is contained in:
Jordan Liggitt
2017-05-05 02:14:38 -04:00
parent e9b02c2e2b
commit d609f4ebca
2 changed files with 64 additions and 4 deletions
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61
pkg/api/pod/util.go
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@@ -21,11 +21,14 @@ import (
"k8s.io/kubernetes/pkg/api"
)
// Visitor is called with each object name, and returns true if visiting should continue
type Visitor func(name string) (shouldContinue bool)
// VisitPodSecretNames invokes the visitor function with the name of every secret
// referenced by the pod spec. If visitor returns false, visiting is short-circuited.
// Transitive references (e.g. pod -> pvc -> pv -> secret) are not visited.
// Returns true if visiting completed, false if visiting was short-circuited.
func VisitPodSecretNames(pod *api.Pod, visitor func(string) bool) bool {
func VisitPodSecretNames(pod *api.Pod, visitor Visitor) bool {
for _, reference := range pod.Spec.ImagePullSecrets {
if !visitor(reference.Name) {
return false
@@ -86,7 +89,7 @@ func VisitPodSecretNames(pod *api.Pod, visitor func(string) bool) bool {
return true
}
func visitContainerSecretNames(container *api.Container, visitor func(string) bool) bool {
func visitContainerSecretNames(container *api.Container, visitor Visitor) bool {
for _, env := range container.EnvFrom {
if env.SecretRef != nil {
if !visitor(env.SecretRef.Name) {
@@ -104,6 +107,60 @@ func visitContainerSecretNames(container *api.Container, visitor func(string) bo
return true
}
// VisitPodConfigmapNames invokes the visitor function with the name of every configmap
// referenced by the pod spec. If visitor returns false, visiting is short-circuited.
// Transitive references (e.g. pod -> pvc -> pv -> secret) are not visited.
// Returns true if visiting completed, false if visiting was short-circuited.
func VisitPodConfigmapNames(pod *api.Pod, visitor Visitor) bool {
for i := range pod.Spec.InitContainers {
if !visitContainerConfigmapNames(&pod.Spec.InitContainers[i], visitor) {
return false
}
}
for i := range pod.Spec.Containers {
if !visitContainerConfigmapNames(&pod.Spec.Containers[i], visitor) {
return false
}
}
var source *api.VolumeSource
for i := range pod.Spec.Volumes {
source = &pod.Spec.Volumes[i].VolumeSource
switch {
case source.Projected != nil:
for j := range source.Projected.Sources {
if source.Projected.Sources[j].ConfigMap != nil {
if !visitor(source.Projected.Sources[j].ConfigMap.Name) {
return false
}
}
}
case source.ConfigMap != nil:
if !visitor(source.ConfigMap.Name) {
return false
}
}
}
return true
}
func visitContainerConfigmapNames(container *api.Container, visitor Visitor) bool {
for _, env := range container.EnvFrom {
if env.ConfigMapRef != nil {
if !visitor(env.ConfigMapRef.Name) {
return false
}
}
}
for _, envVar := range container.Env {
if envVar.ValueFrom != nil && envVar.ValueFrom.ConfigMapKeyRef != nil {
if !visitor(envVar.ValueFrom.ConfigMapKeyRef.Name) {
return false
}
}
}
return true
}
// IsPodReady returns true if a pod is ready; false otherwise.
func IsPodReady(pod *api.Pod) bool {
return IsPodReadyConditionTrue(pod.Status)