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Refactor functions with pod runner #2308

Merged
merged 15 commits into from
Sep 20, 2023
Merged

Refactor functions with pod runner #2308

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b3c07af
Simplify `DeleteData` - validate arguments before pod creation.
e-sumin Sep 6, 2023
6d82294
Minor refactoring of `WriteCredsToPod`
e-sumin Sep 6, 2023
8fe453c
In `CopyVolumeData` function, get rid of redundant `namespace` argument.
e-sumin Sep 6, 2023
b93fe9f
Refactor `BackupDataStats` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
fb0dc55
Refactor `CheckRepository` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
5a4ea71
Refactor `DeleteData` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
dbae586
Refactor `DeleteDataUsingKopiaServer` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
e5d96d3
Refactor `DescribeBackups` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
a5cbbe5
Refactor `PrepareData` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
f8a26a9
Refactor `RestoreData` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
4fa4fa9
Refactor `RestoreDataUsingKopiaServer` to use `PodRunner.RunEx`
e-sumin Sep 6, 2023
a9f84d6
Merge branch 'master' into refactor_functions_with_pod_runner
chaitalisg Sep 6, 2023
57ecd20
Apply suggestions from code review - improve formatting / readability
e-sumin Sep 14, 2023
db19f7f
Fix bug with forgotten old way pod readiness check
e-sumin Sep 19, 2023
5df8365
Merge branch 'master' into refactor_functions_with_pod_runner
mergify[bot] Sep 20, 2023
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37 changes: 25 additions & 12 deletions pkg/function/backup_data_stats.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,10 @@
package function

import (
"bytes"
"context"

"github.com/pkg/errors"
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"

kanister "github.com/kanisterio/kanister/pkg"
Expand Down Expand Up @@ -71,33 +71,46 @@ func backupDataStats(ctx context.Context, cli kubernetes.Interface, tp param.Tem
PodOverride: podOverride,
}
pr := kube.NewPodRunner(cli, options)
podFunc := backupDataStatsPodFunc(cli, tp, namespace, encryptionKey, backupArtifactPrefix, backupID, mode)
return pr.Run(ctx, podFunc)
podFunc := backupDataStatsPodFunc(tp, encryptionKey, backupArtifactPrefix, backupID, mode)
return pr.RunEx(ctx, podFunc)
}

func backupDataStatsPodFunc(cli kubernetes.Interface, tp param.TemplateParams, namespace, encryptionKey, backupArtifactPrefix, backupID, mode string) func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
return func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
func backupDataStatsPodFunc(tp param.TemplateParams, encryptionKey, backupArtifactPrefix, backupID, mode string) func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
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return func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
pod := pc.Pod()

// Wait for pod to reach running state
if err := kube.WaitForPodReady(ctx, cli, pod.Namespace, pod.Name); err != nil {
if err := pc.WaitForPodReady(ctx); err != nil {
return nil, errors.Wrapf(err, "Failed while waiting for Pod %s to be ready", pod.Name)
}
pw, err := GetPodWriter(cli, ctx, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name, tp.Profile)

remover, err := MaybeWriteProfileCredentials(ctx, pc, tp.Profile)
if err != nil {
return nil, err
}
defer CleanUpCredsFile(ctx, pw, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name)

// Parent context could already be dead, so removing file within new context
defer remover.Remove(context.Background()) //nolint:errcheck

cmd, err := restic.StatsCommandByID(tp.Profile, backupArtifactPrefix, backupID, mode, encryptionKey)
if err != nil {
return nil, err
}
stdout, stderr, err := kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr)

commandExecutor, err := pc.GetCommandExecutor()
if err != nil {
return nil, errors.Wrap(err, "Unable to get pod command executor")
}

var stdout, stderr bytes.Buffer
err = commandExecutor.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
Comment on lines +111 to +114
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this is very common pattern in functions - execute, log and then analyze output.
we can extract this functionality to utils and then reuse everywhere to reduce amount of code.

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also not sure whether we need to wait until end of execution and log at the end, probably we can log on the fly, since we passing io.Writer to Exec function.

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Agreed. Could you please create a GitHub issue with this suggestion? It could be good for first-time contributors

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#2334

if err != nil {
return nil, errors.Wrapf(err, "Failed to get backup stats")
}
// Get File Count and Size from Stats
mode, fc, size := restic.SnapshotStatsFromStatsLog(stdout)
mode, fc, size := restic.SnapshotStatsFromStatsLog(stdout.String())
if fc == "" || size == "" {
return nil, errors.New("Failed to parse snapshot stats from logs")
}
Expand Down
23 changes: 14 additions & 9 deletions pkg/function/checkRepository.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,6 @@ import (
"strings"

"github.com/pkg/errors"
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"

kanister "github.com/kanisterio/kanister/pkg"
Expand Down Expand Up @@ -55,22 +54,28 @@ func CheckRepository(ctx context.Context, cli kubernetes.Interface, tp param.Tem
PodOverride: podOverride,
}
pr := kube.NewPodRunner(cli, options)
podFunc := CheckRepositoryPodFunc(cli, tp, namespace, encryptionKey, targetPaths)
return pr.Run(ctx, podFunc)
podFunc := CheckRepositoryPodFunc(cli, tp, encryptionKey, targetPaths)
return pr.RunEx(ctx, podFunc)
}

func CheckRepositoryPodFunc(cli kubernetes.Interface, tp param.TemplateParams, namespace, encryptionKey, targetPath string) func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
return func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
func CheckRepositoryPodFunc(cli kubernetes.Interface, tp param.TemplateParams, encryptionKey, targetPath string) func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
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return func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
pod := pc.Pod()

// Wait for pod to reach running state
if err := kube.WaitForPodReady(ctx, cli, pod.Namespace, pod.Name); err != nil {
if err := pc.WaitForPodReady(ctx); err != nil {
return nil, errors.Wrapf(err, "Failed while waiting for Pod %s to be ready", pod.Name)
}
pw, err := GetPodWriter(cli, ctx, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name, tp.Profile)

remover, err := MaybeWriteProfileCredentials(ctx, pc, tp.Profile)
if err != nil {
return nil, err
}
defer CleanUpCredsFile(ctx, pw, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name)
err = restic.CheckIfRepoIsReachable(tp.Profile, targetPath, encryptionKey, cli, namespace, pod.Name, pod.Spec.Containers[0].Name)

// Parent context could already be dead, so removing file within new context
defer remover.Remove(context.Background()) //nolint:errcheck

err = restic.CheckIfRepoIsReachable(tp.Profile, targetPath, encryptionKey, cli, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name)
e-sumin marked this conversation as resolved.
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switch {
case err == nil:
break
Expand Down
17 changes: 6 additions & 11 deletions pkg/function/copy_volume_data.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,11 +15,11 @@
package function

import (
"bytes"
"context"
"fmt"

"github.com/pkg/errors"
"go.uber.org/zap/buffer"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/rand"
"k8s.io/client-go/kubernetes"
Expand Down Expand Up @@ -80,22 +80,18 @@ func copyVolumeData(ctx context.Context, cli kubernetes.Interface, tp param.Temp
PodOverride: podOverride,
}
pr := kube.NewPodRunner(cli, options)
podFunc := copyVolumeDataPodFunc(cli, tp, namespace, mountPoint, targetPath, encryptionKey)
podFunc := copyVolumeDataPodFunc(cli, tp, mountPoint, targetPath, encryptionKey)
return pr.RunEx(ctx, podFunc)
}

func copyVolumeDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, namespace, mountPoint, targetPath, encryptionKey string) func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
func copyVolumeDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, mountPoint, targetPath, encryptionKey string) func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
e-sumin marked this conversation as resolved.
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return func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
// Wait for pod to reach running state
if err := pc.WaitForPodReady(ctx); err != nil {
return nil, errors.Wrapf(err, "Failed while waiting for Pod %s to be ready", pc.PodName())
}
pw1, err := pc.GetFileWriter()
if err != nil {
return nil, errors.Wrapf(err, "Failed to write credentials to Pod %s", pc.PodName())
}

remover, err := WriteCredsToPod(ctx, pw1, tp.Profile)
remover, err := MaybeWriteProfileCredentials(ctx, pc, tp.Profile)
if err != nil {
return nil, errors.Wrapf(err, "Failed to write credentials to Pod %s", pc.PodName())
}
Expand All @@ -105,7 +101,7 @@ func copyVolumeDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, na

pod := pc.Pod()
// Get restic repository
if err := restic.GetOrCreateRepository(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, targetPath, encryptionKey, tp.Profile); err != nil {
if err := restic.GetOrCreateRepository(cli, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name, targetPath, encryptionKey, tp.Profile); err != nil {
e-sumin marked this conversation as resolved.
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return nil, err
}
// Copy data to object store
Expand All @@ -118,8 +114,7 @@ func copyVolumeDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, na
if err != nil {
return nil, err
}
var stdout buffer.Buffer
var stderr buffer.Buffer
var stdout, stderr bytes.Buffer
err = ex.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
Expand Down
63 changes: 42 additions & 21 deletions pkg/function/delete_data.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
package function

import (
"bytes"
"context"
"fmt"
"strings"
Expand Down Expand Up @@ -67,6 +68,10 @@ func (*deleteDataFunc) Name() string {
}

func deleteData(ctx context.Context, cli kubernetes.Interface, tp param.TemplateParams, reclaimSpace bool, namespace, encryptionKey string, targetPaths, deleteTags, deleteIdentifiers []string, jobPrefix string, podOverride crv1alpha1.JSONMap) (map[string]interface{}, error) {
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if (len(deleteIdentifiers) == 0) == (len(deleteTags) == 0) {
return nil, errors.Errorf("Require one argument: %s or %s", DeleteDataBackupIdentifierArg, DeleteDataBackupTagArg)
}

options := &kube.PodOptions{
Namespace: namespace,
GenerateName: jobPrefix,
Expand All @@ -75,37 +80,48 @@ func deleteData(ctx context.Context, cli kubernetes.Interface, tp param.Template
PodOverride: podOverride,
}
pr := kube.NewPodRunner(cli, options)
podFunc := deleteDataPodFunc(cli, tp, reclaimSpace, namespace, encryptionKey, targetPaths, deleteTags, deleteIdentifiers)
return pr.Run(ctx, podFunc)
podFunc := deleteDataPodFunc(cli, tp, reclaimSpace, encryptionKey, targetPaths, deleteTags, deleteIdentifiers)
return pr.RunEx(ctx, podFunc)
}

//nolint:gocognit
func deleteDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, reclaimSpace bool, namespace, encryptionKey string, targetPaths, deleteTags, deleteIdentifiers []string) func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
return func(ctx context.Context, pod *v1.Pod) (map[string]interface{}, error) {
func deleteDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, reclaimSpace bool, encryptionKey string, targetPaths, deleteTags, deleteIdentifiers []string) func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
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return func(ctx context.Context, pc kube.PodController) (map[string]interface{}, error) {
pod := pc.Pod()

// Wait for pod to reach running state
if err := kube.WaitForPodReady(ctx, cli, pod.Namespace, pod.Name); err != nil {
return nil, errors.Wrapf(err, "Failed while waiting for Pod %s to be ready", pod.Name)
}
if (len(deleteIdentifiers) == 0) == (len(deleteTags) == 0) {
return nil, errors.Errorf("Require one argument: %s or %s", DeleteDataBackupIdentifierArg, DeleteDataBackupTagArg)

remover, err := MaybeWriteProfileCredentials(ctx, pc, tp.Profile)
if err != nil {
return nil, err
}
pw, err := GetPodWriter(cli, ctx, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name, tp.Profile)

// Parent context could already be dead, so removing file within new context
defer remover.Remove(context.Background()) //nolint:errcheck

// Get command executor
podCommandExecutor, err := pc.GetCommandExecutor()
if err != nil {
return nil, err
}
defer CleanUpCredsFile(ctx, pw, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name)

for i, deleteTag := range deleteTags {
cmd, err := restic.SnapshotsCommandByTag(tp.Profile, targetPaths[i], deleteTag, encryptionKey)
if err != nil {
return nil, err
}
stdout, stderr, err := kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr)

var stdout, stderr bytes.Buffer
err = podCommandExecutor.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
if err != nil {
return nil, errors.Wrapf(err, "Failed to forget data, could not get snapshotID from tag, Tag: %s", deleteTag)
}
deleteIdentifier, err := restic.SnapshotIDFromSnapshotLog(stdout)
deleteIdentifier, err := restic.SnapshotIDFromSnapshotLog(stdout.String())
if err != nil {
return nil, errors.Wrapf(err, "Failed to forget data, could not get snapshotID from tag, Tag: %s", deleteTag)
}
Expand All @@ -117,14 +133,16 @@ func deleteDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, reclai
if err != nil {
return nil, err
}
stdout, stderr, err := kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr)

var stdout, stderr bytes.Buffer
err = podCommandExecutor.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
if err != nil {
return nil, errors.Wrapf(err, "Failed to forget data")
}
if reclaimSpace {
spaceFreedStr, err := pruneData(cli, tp, pod, namespace, encryptionKey, targetPaths[i])
spaceFreedStr, err := pruneData(tp, pod, podCommandExecutor, encryptionKey, targetPaths[i])
if err != nil {
return nil, errors.Wrapf(err, "Error executing prune command")
}
Expand All @@ -138,15 +156,18 @@ func deleteDataPodFunc(cli kubernetes.Interface, tp param.TemplateParams, reclai
}
}

func pruneData(cli kubernetes.Interface, tp param.TemplateParams, pod *v1.Pod, namespace, encryptionKey, targetPath string) (string, error) {
func pruneData(tp param.TemplateParams, pod *v1.Pod, podCommandExecutor kube.PodCommandExecutor, encryptionKey, targetPath string) (string, error) {
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cmd, err := restic.PruneCommand(tp.Profile, targetPath, encryptionKey)
if err != nil {
return "", err
}
stdout, stderr, err := kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stdout)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stderr)
spaceFreed := restic.SpaceFreedFromPruneLog(stdout)

var stdout, stderr bytes.Buffer
err = podCommandExecutor.Exec(context.Background(), cmd, nil, &stdout, &stderr)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.Log(pod.Name, pod.Spec.Containers[0].Name, stderr.String())

spaceFreed := restic.SpaceFreedFromPruneLog(stdout.String())
return spaceFreed, errors.Wrapf(err, "Failed to prune data after forget")
}

Expand Down
40 changes: 24 additions & 16 deletions pkg/function/delete_data_using_kopia_server.go
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,10 @@
package function

import (
"bytes"
"context"

"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"

kanister "github.com/kanisterio/kanister/pkg"
Expand Down Expand Up @@ -142,31 +142,30 @@ func deleteDataFromServer(
}
pr := kube.NewPodRunner(cli, options)
podFunc := deleteDataFromServerPodFunc(
cli,
hostname,
namespace,
serverAddress,
fingerprint,
snapID,
username,
userPassphrase,
)
return pr.Run(ctx, podFunc)
return pr.RunEx(ctx, podFunc)
}

func deleteDataFromServerPodFunc(
cli kubernetes.Interface,
hostname,
namespace,
serverAddress,
fingerprint,
snapID,
username,
userPassphrase string,
) func(ctx context.Context, pod *corev1.Pod) (map[string]any, error) {
return func(ctx context.Context, pod *corev1.Pod) (map[string]any, error) {
if err := kube.WaitForPodReady(ctx, cli, pod.Namespace, pod.Name); err != nil {
return nil, errors.Wrap(err, "Failed while waiting for Pod: "+pod.Name+" to be ready")
) func(ctx context.Context, pc kube.PodController) (map[string]any, error) {
return func(ctx context.Context, pc kube.PodController) (map[string]any, error) {
pod := pc.Pod()

// Wait for pod to reach running state
if err := pc.WaitForPodReady(ctx); err != nil {
return nil, errors.Wrapf(err, "Failed while waiting for Pod %s to be ready", pod.Name)
}

contentCacheMB, metadataCacheMB := kopiacmd.GetCacheSizeSettingsForSnapshot()
Expand All @@ -184,9 +183,16 @@ func deleteDataFromServerPodFunc(
ContentCacheMB: contentCacheMB,
MetadataCacheMB: metadataCacheMB,
})
stdout, stderr, err := kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stdout)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stderr)

commandExecutor, err := pc.GetCommandExecutor()
if err != nil {
return nil, errors.Wrap(err, "Unable to get pod command executor")
}

var stdout, stderr bytes.Buffer
err = commandExecutor.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
if err != nil {
return nil, errors.Wrap(err, "Failed to connect to Kopia Repository server")
}
Expand All @@ -200,9 +206,11 @@ func deleteDataFromServerPodFunc(
},
SnapID: snapID,
})
stdout, stderr, err = kube.Exec(cli, namespace, pod.Name, pod.Spec.Containers[0].Name, cmd, nil)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stdout)
format.Log(pod.Name, pod.Spec.Containers[0].Name, stderr)
stdout.Reset()
stderr.Reset()
err = commandExecutor.Exec(ctx, cmd, nil, &stdout, &stderr)
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stdout.String())
format.LogWithCtx(ctx, pod.Name, pod.Spec.Containers[0].Name, stderr.String())
return nil, errors.Wrap(err, "Failed to delete backup from Kopia API server")
}
}
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