lookup minio.velero.svc on : no such host

[rxy0210]

velero version: v1.15.0
K8s version: 1.21

I deployed the environment according to this document.https://velero.io/docs/v1.9/contributions/minio/#accessing-logs-with-an-https-endpoint

[root@ velero]# kubectl -nvelero get po
NAME                      READY   STATUS      RESTARTS   AGE
minio-f957674b9-lsqs5     1/1     Running     0          81m
minio-setup-9zzm2         0/1     Completed   0          81m
velero-65d8b9984d-7btfk   1/1     Running     0          32m

But when I performed this step, I got this prompt.

[root@ velero]# velero backup describe nginx-backup
Name:         nginx-backup
Namespace:    velero
Labels:       velero.io/storage-location=default
Annotations:  velero.io/resource-timeout=10m0s
              velero.io/source-cluster-k8s-gitversion=v1.21.5
              velero.io/source-cluster-k8s-major-version=1
              velero.io/source-cluster-k8s-minor-version=21+

Phase:  PartiallyFailed (run `velero backup logs nginx-backup` for more information)

Warnings:  <error getting warnings: Get "http://minio.velero.svc:9000/velero/backups/nginx-backup/nginx-backup-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20250122%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20250122T020612Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=71e752da4224d1e1577e91f449157c0731722dbd5c2fe3e1b42d158495fd4108": dial tcp: lookup minio.velero.svc on 8.8.8.8:53: no such host>

Errors:  <error getting errors: Get "http://minio.velero.svc:9000/velero/backups/nginx-backup/nginx-backup-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20250122%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20250122T020612Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=71e752da4224d1e1577e91f449157c0731722dbd5c2fe3e1b42d158495fd4108": dial tcp: lookup minio.velero.svc on 8.8.8.8:53: no such host>

Namespaces:
  Included:  *
  Excluded:  <none>

Resources:
  Included:        *
  Excluded:        <none>
  Cluster-scoped:  auto

Label selector:  app=nginx

Or label selector:  <none>

Storage Location:  default

Velero-Native Snapshot PVs:  auto
Snapshot Move Data:          false
Data Mover:                  velero

TTL:  720h0m0s

CSISnapshotTimeout:    10m0s
ItemOperationTimeout:  4h0m0s

Hooks:  <none>

Backup Format Version:  1.1.0

Started:    2025-01-22 10:06:02 +0800 CST
Completed:  2025-01-22 10:06:07 +0800 CST

Expiration:  2025-02-21 10:06:02 +0800 CST

Total items to be backed up:  32
Items backed up:              32

Backup Volumes:
  <error getting backup volume info: Get "http://minio.velero.svc:9000/velero/backups/nginx-backup/nginx-backup-volumeinfo.json.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20250122%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20250122T020612Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=88aa01b0f6612b635d405b9fe362ae4790d8d34113bb885f53f711bbb71a06be": dial tcp: lookup minio.velero.svc on 8.8.8.8:53: no such host>

HooksAttempted:  0
HooksFailed:     0

Why is that?

Is that the problem here?

[root@ velero]# kubectl -nvelero exec -it  minio-f957674b9-lsqs5 -- mc alias ls
mc: Configuration written to `/tmp/.mc/config.json`. Please update your access credentials.
mc: Successfully created `/tmp/.mc/share`.
mc: Initialized share uploads `/tmp/.mc/share/uploads.json` file.
mc: Initialized share downloads `/tmp/.mc/share/downloads.json` file.
gcs
  URL       : https://storage.googleapis.com
  AccessKey : YOUR-ACCESS-KEY-HERE
  SecretKey : YOUR-SECRET-KEY-HERE
  API       : S3v2
  Path      : dns
  Src       : /tmp/.mc/config.json

local
  URL       : http://localhost:9000
  AccessKey :
  SecretKey :
  API       :
  Path      : auto
  Src       : /tmp/.mc/config.json

play
  URL       : https://play.min.io
  AccessKey : Q3AM3UQ867SPQQA43P2F
  SecretKey : zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG
  API       : S3v4
  Path      : auto
  Src       : /tmp/.mc/config.json

s3
  URL       : https://s3.amazonaws.com
  AccessKey : YOUR-ACCESS-KEY-HERE
  SecretKey : YOUR-SECRET-KEY-HERE
  API       : S3v4
  Path      : dns
  Src       : /tmp/.mc/config.json

[kaovilai]

It's obvious that minio.velero.svc would not work when using public DNS 8.8.8.8:53 to resolve..

I suggest you do not customize /etc/resolv.conf that are kube defaults.