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images.go
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images.go
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package deployment
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"github.com/kluctl/kluctl/v2/pkg/k8s"
"github.com/kluctl/kluctl/v2/pkg/status"
"github.com/kluctl/kluctl/v2/pkg/types"
k8s2 "github.com/kluctl/kluctl/v2/pkg/types/k8s"
"github.com/kluctl/kluctl/v2/pkg/utils/uo"
"github.com/kluctl/kluctl/v2/pkg/yaml"
"k8s.io/apimachinery/pkg/api/errors"
"sort"
"strings"
"sync"
)
type Images struct {
fixedImages []types.FixedImage
seenImages []types.FixedImage
mutex sync.Mutex
}
func NewImages() (*Images, error) {
return &Images{}, nil
}
func (images *Images) AddFixedImage(fi types.FixedImage) {
images.fixedImages = append(images.fixedImages, fi)
}
func (images *Images) PrependFixedImages(fis []types.FixedImage) {
var newFixedImages []types.FixedImage
newFixedImages = append(newFixedImages, fis...)
newFixedImages = append(newFixedImages, images.fixedImages...)
images.fixedImages = newFixedImages
}
func (images *Images) FixedImages() []types.FixedImage {
if images == nil {
return nil
}
return images.fixedImages
}
func (images *Images) SeenImages(simple bool) []types.FixedImage {
if images == nil {
return nil
}
var ret []types.FixedImage
for _, fi := range images.seenImages {
if simple {
ret = append(ret, types.FixedImage{
Image: fi.Image,
ResultImage: fi.ResultImage,
})
} else {
ret = append(ret, fi)
}
}
sort.Slice(ret, func(i, j int) bool {
return ret[i].Image < ret[j].Image
})
return ret
}
func (images *Images) parseFixedImagesFromVars(vars *uo.UnstructuredObject) ([]types.FixedImage, error) {
fisU, _, err := vars.GetNestedObjectList("images")
if err != nil {
return nil, fmt.Errorf("failed to parse fixed images from vars: %w", err)
}
fis := make([]types.FixedImage, 0, len(fisU))
for i, u := range fisU {
var fi types.FixedImage
err = u.ToStruct(&fi)
if err != nil {
return nil, fmt.Errorf("failed to parse fixed image from vars at index %d: %w", i, err)
}
fis = append(fis, fi)
}
return fis, nil
}
func (images *Images) getFixedImage(image string, namespace string, deployment string, container string, vars *uo.UnstructuredObject) (*string, error) {
cmpList := func(fis []types.FixedImage) *string {
for i := len(fis) - 1; i >= 0; i-- {
fi := fis[i]
if fi.Image != image {
continue
}
if fi.Namespace != nil && namespace != *fi.Namespace {
continue
}
if fi.Deployment != nil && deployment != *fi.Deployment {
continue
}
if fi.Container != nil && container != *fi.Container {
continue
}
return &fi.ResultImage
}
return nil
}
fisFromVars, err := images.parseFixedImagesFromVars(vars)
if err != nil {
return nil, err
}
fi := cmpList(images.fixedImages)
if fi != nil {
return fi, nil
}
fi = cmpList(fisFromVars)
if fi != nil {
return fi, nil
}
return nil, nil
}
const beginPlaceholder = "XXXXXbegin_get_image_"
const endPlaceholder = "_end_get_imageXXXXX"
type placeHolder struct {
Image string `json:"image"`
HasLatestVersion bool `json:"hasLatestVersion"`
Container string
FieldPath []interface{}
FieldValue string
StartOffset int
EndOffset int
}
func (images *Images) parsePlaceholder(s string, offset int) (*placeHolder, error) {
start := strings.Index(s[offset:], beginPlaceholder)
if start == -1 {
return nil, nil
}
end := strings.Index(s[start:], endPlaceholder)
if end == -1 {
return nil, fmt.Errorf("beginPlaceholder marker without endPlaceholder marker")
}
b64 := s[start+len(beginPlaceholder) : end]
b, err := base64.StdEncoding.DecodeString(b64)
if err != nil {
return nil, err
}
var ph placeHolder
err = yaml.ReadYamlStream(bytes.NewReader(b), &ph)
if err != nil {
return nil, err
}
ph.FieldValue = s
ph.StartOffset = start
ph.EndOffset = end + len(endPlaceholder)
return &ph, nil
}
func (images *Images) extractContainerName(parent interface{}) string {
parentM, ok := parent.(map[string]interface{})
if ok {
if x, ok := parentM["name"]; ok {
if y, ok := x.(string); ok {
return y
}
}
}
return ""
}
func (images *Images) FindPlaceholders(o *uo.UnstructuredObject) ([]placeHolder, error) {
var ret []placeHolder
err := uo.NewObjectIterator(o.Object).IterateLeafs(func(it *uo.ObjectIterator) error {
s, ok := it.Value().(string)
if !ok {
return nil
}
container := images.extractContainerName(it.Parent())
offset := 0
for true {
ph, err := images.parsePlaceholder(s, offset)
if err != nil {
return err
}
if ph == nil {
break
}
ph.FieldPath = it.KeyPathCopy()
ph.Container = container
ret = append(ret, *ph)
offset = ph.EndOffset
}
return nil
})
if err != nil {
return nil, err
}
return ret, nil
}
func (images *Images) ResolvePlaceholders(ctx context.Context, k *k8s.K8sCluster, o *uo.UnstructuredObject, deploymentDir string, tags []string, vars *uo.UnstructuredObject) error {
placeholders, err := images.FindPlaceholders(o)
if err != nil {
return err
}
ref := o.GetK8sRef()
deployment := fmt.Sprintf("%s/%s", ref.Kind, ref.Name)
var remoteObject *uo.UnstructuredObject
triedRemoteObject := false
// iterate backwards so that replacements are easy
for i := len(placeholders) - 1; i >= 0; i-- {
ph := placeholders[i]
if !triedRemoteObject {
triedRemoteObject = true
if k != nil {
remoteObject, _, err = k.GetSingleObject(o.GetK8sRef())
if err != nil && !errors.IsNotFound(err) {
return err
}
}
}
var deployed *string
if remoteObject != nil && ph.StartOffset == 0 && ph.EndOffset == len(ph.FieldValue) {
x, found, _ := remoteObject.GetNestedField(ph.FieldPath...)
if found {
if y, ok := x.(string); ok {
deployed = &y
}
}
}
resultImage, err := images.resolveImage(ctx, ph, ref, deployment, deployed, deploymentDir, tags, vars)
if err != nil {
return err
}
if resultImage == nil {
return fmt.Errorf("failed to find fixed image for %s", ph.Image)
}
ph.FieldValue = ph.FieldValue[:ph.StartOffset] + *resultImage + ph.FieldValue[ph.EndOffset:]
err = o.SetNestedField(ph.FieldValue, ph.FieldPath...)
if err != nil {
return err
}
}
return nil
}
func (images *Images) resolveImage(ctx context.Context, ph placeHolder, ref k8s2.ObjectRef, deployment string, deployed *string, deploymentDir string, tags []string, vars *uo.UnstructuredObject) (*string, error) {
if ph.HasLatestVersion {
status.Deprecation(ctx, "latest-version-filter", "latest_version is deprecated when using images.get_image() and is completely ignored. Please remove usages of latest_version as it will fail to render in a future kluctl release.")
}
result, err := images.getFixedImage(ph.Image, ref.Namespace, deployment, ph.Container, vars)
if err != nil {
return nil, err
}
si := types.FixedImage{
Image: ph.Image,
DeployedImage: deployed,
Namespace: &ref.Namespace,
Object: &ref,
Deployment: &deployment,
Container: &ph.Container,
DeployTags: tags,
DeploymentDir: &deploymentDir,
}
if result != nil {
si.ResultImage = *result
}
images.mutex.Lock()
images.seenImages = append(images.seenImages, si)
images.mutex.Unlock()
return result, nil
}