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normalize.go
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normalize.go
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package diff
import (
"fmt"
"github.com/kluctl/kluctl/pkg/types"
"github.com/kluctl/kluctl/pkg/utils/uo"
"regexp"
"strconv"
"strings"
)
func listToMap(l []*uo.UnstructuredObject, key string) (map[string]interface{}, error) {
m := make(map[string]interface{})
for _, e := range l {
kv, found, _ := e.GetNestedString(key)
if !found {
return nil, fmt.Errorf("%s not found in list element", key)
}
m[kv] = e.Object
}
return m, nil
}
func normalizeEnv(container *uo.UnstructuredObject) {
env := container.GetNestedObjectListNoErr("env")
envFrom := container.GetNestedObjectListNoErr("envFrom")
if len(env) != 0 {
newEnv, err := listToMap(env, "name")
if err == nil {
_ = container.SetNestedField(newEnv, "env")
}
}
if len(envFrom) != 0 {
envTypes := []string{"configMapRef", "secretRef"}
m := make(map[string]interface{})
for _, e := range envFrom {
k := ""
for _, t := range envTypes {
name, found, _ := e.GetNestedString(t, "name")
if !found {
continue
}
k = fmt.Sprintf("%s/%s", t, name)
}
if k == "" {
if _, ok := m["unknown"]; !ok {
m["unknown"] = []interface{}{}
}
m["unknown"] = append(m["unknown"].([]interface{}), e)
} else {
m[k] = e
}
}
_ = container.SetNestedField(m, "envFrom")
}
}
func normalizeContainers(containers []*uo.UnstructuredObject) {
for _, c := range containers {
normalizeEnv(c)
}
}
func normalizeSecretAndConfigMaps(o *uo.UnstructuredObject) {
data, found, _ := o.GetNestedObject("data")
if found && len(data.Object) == 0 {
_ = data.RemoveNestedField("data")
}
}
func normalizeServiceAccount(o *uo.UnstructuredObject) {
serviceAccountName, found, _ := o.GetNestedString("metadata", "name")
if !found {
return
}
secrets, found, _ := o.GetNestedObjectList("secrets")
if !found {
return
}
// remove default service account tokens
var newSecrets []interface{}
for _, s := range secrets {
name, found, _ := s.GetNestedString("name")
if !found || strings.HasPrefix(name, fmt.Sprintf("%s-", serviceAccountName)) {
continue
}
newSecrets = append(newSecrets, s)
}
_ = o.SetNestedField(newSecrets, "secrets")
}
func normalizeMetadata(o *uo.UnstructuredObject) {
// We don't care about managedFields when diffing (they just produce noise)
_ = o.RemoveNestedField("metadata", "managedFields")
_ = o.RemoveNestedField("metadata", "annotations", "managedFields", "kubectl.kubernetes.io/last-applied-configuration")
// We don't want to see this in diffs
_ = o.RemoveNestedField("metadata", "creationTimestamp")
_ = o.RemoveNestedField("metadata", "generation")
_ = o.RemoveNestedField("metadata", "resourceVersion")
_ = o.RemoveNestedField("metadata", "selfLink")
_ = o.RemoveNestedField("metadata", "uid")
// Ensure empty labels/metadata exist
_ = o.SetNestedFieldDefault(map[string]string{}, "metadata", "labels")
_ = o.SetNestedFieldDefault(map[string]string{}, "metadata", "annotations")
}
func normalizeMisc(o *uo.UnstructuredObject) {
// These are random values found in Jobs
_ = o.RemoveNestedField("spec", "template", "metadata", "labels", "controller-uid")
_ = o.RemoveNestedField("spec", "selector", "matchLabels", "controller-uid")
_ = o.RemoveNestedField("status")
}
var ignoreDiffFieldAnnotationRegex = regexp.MustCompile(`^kluctl.io/ignore-diff-field(-\d*)?$`)
// NormalizeObject Performs some deterministic sorting and other normalizations to avoid ugly diffs due to order changes
func NormalizeObject(o_ *uo.UnstructuredObject, ignoreForDiffs []*types.IgnoreForDiffItemConfig, localObject *uo.UnstructuredObject) *uo.UnstructuredObject {
gvk := o_.GetK8sGVK()
name := o_.GetK8sName()
ns := o_.GetK8sNamespace()
o := o_.Clone()
normalizeMetadata(o)
normalizeMisc(o)
switch gvk.Kind {
case "Deployment", "StatefulSet", "DaemonSet", "job":
normalizeContainers(o.GetNestedObjectListNoErr("spec", "template", "spec", "containers"))
case "Secret", "ConfigMap":
normalizeSecretAndConfigMaps(o)
case "ServiceAccount":
normalizeServiceAccount(o)
}
checkMatch := func(v string, m *string) bool {
if v == "" || m == nil {
return true
}
return v == *m
}
for _, ifd := range ignoreForDiffs {
if !checkMatch(gvk.Group, ifd.Group) {
continue
}
if !checkMatch(gvk.Kind, ifd.Kind) {
continue
}
if !checkMatch(ns, ifd.Namespace) {
continue
}
if !checkMatch(name, ifd.Name) {
continue
}
for _, fp := range ifd.FieldPath {
jp, err := uo.NewMyJsonPath(fp)
if err != nil {
continue
}
_ = jp.Del(o.Object)
}
}
ignoreAll, _ := strconv.ParseBool(localObject.GetK8sAnnotations()["kluctl.io/ignore-diff"])
if ignoreAll {
// Return empty object so that diffs will always be empty
return &uo.UnstructuredObject{Object: map[string]interface{}{}}
}
for _, v := range localObject.GetK8sAnnotationsWithRegex(ignoreDiffFieldAnnotationRegex) {
j, err := uo.NewMyJsonPath(v)
if err != nil {
continue
}
_ = j.Del(o.Object)
}
return o
}