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util.go
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util.go
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// Copyright © 2021 Alibaba Group Holding Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package clusterfile
import (
"fmt"
"os"
"strings"
k8sV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/yaml"
"github.com/labring/sealos/pkg/constants"
"github.com/labring/sealos/pkg/runtime/decode"
v2 "github.com/labring/sealos/pkg/types/v1beta1"
yaml2 "github.com/labring/sealos/pkg/utils/yaml"
)
var ErrClusterNotExist = fmt.Errorf("no cluster exist")
func GetDefaultClusterName() (string, error) {
files, err := os.ReadDir(constants.WorkDir())
if err != nil {
return "", err
}
var clusters []string
for _, f := range files {
if f.IsDir() {
clusters = append(clusters, f.Name())
}
}
if len(clusters) == 1 {
return clusters[0], nil
} else if len(clusters) > 1 {
return "", fmt.Errorf("select a cluster through the -c parameter: " + strings.Join(clusters, ","))
}
return "", ErrClusterNotExist
}
func GetClusterFromName(clusterName string) (cluster *v2.Cluster, err error) {
if clusterName == "" {
clusterName, err = GetDefaultClusterName()
if err != nil {
return nil, err
}
}
clusterFile := constants.Clusterfile(clusterName)
cluster, err = GetClusterFromFile(clusterFile)
return
}
func GetClusterFromFile(filepath string) (cluster *v2.Cluster, err error) {
cluster = &v2.Cluster{}
if err = yaml2.UnmarshalYamlFromFile(filepath, cluster); err != nil {
return nil, fmt.Errorf("failed to get cluster from %s, %v", filepath, err)
}
return cluster, nil
}
func GetClusterFromDataCompatV1(data []byte) (*v2.Cluster, error) {
var cluster *v2.Cluster
metaType := k8sV1.TypeMeta{}
err := yaml.Unmarshal(data, &metaType)
if err != nil {
return nil, err
}
if metaType.Kind != constants.Cluster {
return nil, fmt.Errorf("not found type cluster from: \n%s", data)
}
c, err := decode.CRDFromString(string(data), constants.Cluster)
if err != nil {
return nil, err
} else if c == nil {
return nil, fmt.Errorf("not found type cluster from: \n%s", data)
}
cluster = c.(*v2.Cluster)
return cluster, nil
}