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38 lines
1014 B
Go
38 lines
1014 B
Go
package utils
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import (
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"crypto/sha256"
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"encoding/base64"
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"strings"
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"unicode"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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)
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// Create a stable UID that will be unique across a multi-tenant cluster
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// This is useful while we migrate from SQL storage to something where the UID (GUID)
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// is actually baked into the storage engine itself.
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func CalculateClusterWideUID(obj runtime.Object) types.UID {
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gvk := obj.GetObjectKind().GroupVersionKind()
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hasher := sha256.New()
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hasher.Write([]byte(gvk.Group))
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hasher.Write([]byte("|"))
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hasher.Write([]byte(gvk.Kind))
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hasher.Write([]byte("|"))
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meta, err := meta.Accessor(obj)
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if err == nil {
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hasher.Write([]byte(meta.GetNamespace()))
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hasher.Write([]byte("|"))
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hasher.Write([]byte(meta.GetName()))
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}
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v := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
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return types.UID(strings.Map(func(r rune) rune {
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if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
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return 'X'
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}
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return r
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}, v))
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}
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