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images.go
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images.go
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package k8s
import (
"fmt"
"sort"
"time"
"github.com/defenseunicorns/zarf/cli/internal/message"
corev1 "k8s.io/api/core/v1"
)
type ImageMap map[string]bool
// GetAllImages returns a list of images found in pods in the cluster.
func GetAllImages() ([]string, error) {
var images []string
var err error
timeout := time.After(5 * time.Minute)
for {
// delay check 2 seconds
time.Sleep(2 * time.Second)
select {
// on timeout abort
case <-timeout:
message.Debug("get image list timed-out")
return images, nil
// after delay, try running
default:
// If no images or an error, log and loop
if images, err = GetImages(corev1.NamespaceAll); len(images) < 1 || err != nil {
message.Debug(err)
} else {
// Otherwise, return the image list
return images, nil
}
}
}
}
// GetImages returns all images for in pods in a given namespace.
func GetImages(namespace string) ([]string, error) {
images := make(ImageMap)
pods, err := GetPods(namespace)
if err != nil {
return []string{}, fmt.Errorf("unable to get the list of pods in the cluster")
}
for _, pod := range pods.Items {
images = BuildImageMap(images, pod.Spec)
}
return SortImages(images, nil), nil
}
// BuildImageMap looks for init container, ephemeral and regular container images.
func BuildImageMap(images ImageMap, pod corev1.PodSpec) ImageMap {
for _, container := range pod.InitContainers {
images[container.Image] = true
}
for _, container := range pod.Containers {
images[container.Image] = true
}
for _, container := range pod.EphemeralContainers {
images[container.Image] = true
}
return images
}
// SortImages returns a sorted list of images.
func SortImages(images, compareWith ImageMap) []string {
sortedImages := sort.StringSlice{}
for image := range images {
if !compareWith[image] || compareWith == nil {
// Check compareWith, if it exists only add if not in that list
sortedImages = append(sortedImages, image)
}
}
sort.Sort(sortedImages)
return sortedImages
}