127 lines
3.5 KiB
Go
127 lines
3.5 KiB
Go
/*
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Copyright 2018 the Heptio Ark contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package restore
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import (
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"fmt"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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api "github.com/heptio/ark/pkg/apis/ark/v1"
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"github.com/heptio/ark/pkg/buildinfo"
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"github.com/heptio/ark/pkg/restic"
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"github.com/heptio/ark/pkg/util/kube"
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)
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type resticRestoreAction struct {
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logger logrus.FieldLogger
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initContainerImage string
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}
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func NewResticRestoreAction(logger logrus.FieldLogger) ItemAction {
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return &resticRestoreAction{
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logger: logger,
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initContainerImage: initContainerImage(),
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}
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}
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func initContainerImage() string {
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tag := buildinfo.Version
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if tag == "" {
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tag = "latest"
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}
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// TODO allow full image URL to be overriden via CLI flag.
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return fmt.Sprintf("gcr.io/heptio-images/ark-restic-restore-helper:%s", tag)
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}
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func (a *resticRestoreAction) AppliesTo() (ResourceSelector, error) {
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return ResourceSelector{
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IncludedResources: []string{"pods"},
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}, nil
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}
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func (a *resticRestoreAction) Execute(obj runtime.Unstructured, restore *api.Restore) (runtime.Unstructured, error, error) {
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a.logger.Info("Executing resticRestoreAction")
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defer a.logger.Info("Done executing resticRestoreAction")
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var pod corev1.Pod
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if err := runtime.DefaultUnstructuredConverter.FromUnstructured(obj.UnstructuredContent(), &pod); err != nil {
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return nil, nil, errors.Wrap(err, "unable to convert pod from runtime.Unstructured")
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}
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log := a.logger.WithField("pod", kube.NamespaceAndName(&pod))
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volumeSnapshots := restic.GetPodSnapshotAnnotations(&pod)
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if len(volumeSnapshots) == 0 {
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log.Debug("No restic snapshot ID annotations found")
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return obj, nil, nil
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}
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log.Info("Restic snapshot ID annotations found")
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initContainer := corev1.Container{
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Name: restic.InitContainer,
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Image: a.initContainerImage,
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Args: []string{string(restore.UID)},
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Env: []corev1.EnvVar{
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{
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Name: "POD_NAMESPACE",
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ValueFrom: &corev1.EnvVarSource{
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FieldRef: &corev1.ObjectFieldSelector{
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FieldPath: "metadata.namespace",
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},
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},
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},
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{
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Name: "POD_NAME",
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ValueFrom: &corev1.EnvVarSource{
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FieldRef: &corev1.ObjectFieldSelector{
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FieldPath: "metadata.name",
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},
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},
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},
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},
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}
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for volumeName := range volumeSnapshots {
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mount := corev1.VolumeMount{
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Name: volumeName,
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MountPath: "/restores/" + volumeName,
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}
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initContainer.VolumeMounts = append(initContainer.VolumeMounts, mount)
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}
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if len(pod.Spec.InitContainers) == 0 || pod.Spec.InitContainers[0].Name != "restic-wait" {
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pod.Spec.InitContainers = append([]corev1.Container{initContainer}, pod.Spec.InitContainers...)
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} else {
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pod.Spec.InitContainers[0] = initContainer
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}
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res, err := runtime.DefaultUnstructuredConverter.ToUnstructured(&pod)
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if err != nil {
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return nil, nil, errors.Wrap(err, "unable to convert pod to runtime.Unstructured")
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}
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return &unstructured.Unstructured{Object: res}, nil, nil
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}
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