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package libkpod
import (
"encoding/json"
"path/filepath"
"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
"github.com/docker/docker/pkg/ioutils"
"github.com/projectatomic/libpod/oci"
"github.com/projectatomic/libpod/pkg/annotations"
"github.com/opencontainers/runtime-tools/generate"
)
const configFile = "config.json"
// ContainerRename renames the given container
func (c *ContainerServer) ContainerRename(container, name string) error {
ctr, err := c.LookupContainer(container)
if err != nil {
return err
}
oldName := ctr.Name()
_, err = c.ReserveContainerName(ctr.ID(), name)
if err != nil {
return err
}
defer func() {
if err != nil {
c.ReleaseContainerName(name)
} else {
c.ReleaseContainerName(oldName)
}
}()
// Update state.json
if err = c.updateStateName(ctr, name); err != nil {
return err
}
// Update config.json
configRuntimePath := filepath.Join(ctr.BundlePath(), configFile)
if err = updateConfigName(configRuntimePath, name); err != nil {
return err
}
configStoragePath := filepath.Join(ctr.Dir(), configFile)
if err = updateConfigName(configStoragePath, name); err != nil {
return err
}
// Update containers.json
if err = c.store.SetNames(ctr.ID(), []string{name}); err != nil {
return err
}
return nil
}
func updateConfigName(configPath, name string) error {
specgen, err := generate.NewFromFile(configPath)
if err != nil {
return err
}
specgen.AddAnnotation(annotations.Name, name)
specgen.AddAnnotation(annotations.Metadata, updateMetadata(specgen.Spec().Annotations, name))
return specgen.SaveToFile(configPath, generate.ExportOptions{})
}
func (c *ContainerServer) updateStateName(ctr *oci.Container, name string) error {
ctr.State().Annotations[annotations.Name] = name
ctr.State().Annotations[annotations.Metadata] = updateMetadata(ctr.State().Annotations, name)
// This is taken directly from c.ContainerStateToDisk(), which can't be used because of the call to UpdateStatus() in the first line
jsonSource, err := ioutils.NewAtomicFileWriter(ctr.StatePath(), 0644)
if err != nil {
return err
}
defer jsonSource.Close()
enc := json.NewEncoder(jsonSource)
return enc.Encode(c.runtime.ContainerStatus(ctr))
}
// Attempts to update a metadata annotation
func updateMetadata(specAnnotations map[string]string, name string) string {
oldMetadata := specAnnotations[annotations.Metadata]
containerType := specAnnotations[annotations.ContainerType]
if containerType == "container" {
metadata := runtime.ContainerMetadata{}
err := json.Unmarshal([]byte(oldMetadata), metadata)
if err != nil {
return oldMetadata
}
metadata.Name = name
m, err := json.Marshal(metadata)
if err != nil {
return oldMetadata
}
return string(m)
} else if containerType == "sandbox" {
metadata := runtime.PodSandboxMetadata{}
err := json.Unmarshal([]byte(oldMetadata), metadata)
if err != nil {
return oldMetadata
}
metadata.Name = name
m, err := json.Marshal(metadata)
if err != nil {
return oldMetadata
}
return string(m)
} else {
return specAnnotations[annotations.Metadata]
}
}
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