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package util
import (
"fmt"
"github.com/docker/buildx/store"
"github.com/google/uuid"
"github.com/pkg/errors"
"k8s.io/apiserver/pkg/storage/names"
)
func GenerateNodeName(builderName string, txn *store.Txn) (string, error) {
randomName := func() (string, error) {
u, err := uuid.NewRandom()
if err != nil {
return "", err
}
return names.SimpleNameGenerator.GenerateName(fmt.Sprintf("buildkit-%s-", u)), nil
}
ng, err := txn.NodeGroupByName(builderName)
if err != nil {
return randomName()
}
var name string
for i := 0; i < 6; i++ {
name, err = randomName()
if err != nil {
return "", err
}
exists := func(name string) bool {
for _, n := range ng.Nodes {
if n.Name == name {
return true
}
}
return false
}(name)
if exists {
continue
}
return name, nil
}
return "", errors.Errorf("failed to generate random node name")
}
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