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