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/*
Copyright 2018 Google LLC
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
https://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 utils
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"github.com/containerd/cri/pkg/annotations"
specs "github.com/opencontainers/runtime-spec/specs-go"
)
// ReadSpec reads OCI spec from the bundle directory.
func ReadSpec(bundle string) (*specs.Spec, error) {
f, err := os.Open(filepath.Join(bundle, "config.json"))
if err != nil {
return nil, err
}
b, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
var spec specs.Spec
if err := json.Unmarshal(b, &spec); err != nil {
return nil, err
}
return &spec, nil
}
// IsSandbox checks whether a container is a sandbox container.
func IsSandbox(spec *specs.Spec) bool {
t, ok := spec.Annotations[annotations.ContainerType]
return !ok || t == annotations.ContainerTypeSandbox
}
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