Metro Node：升級至 8.0.x 後，中繼資料備份停止運作

Summary: 本文討論升級至 8.0.x 程式碼後，中繼資料備份無法運作的問題。本文提供還原中繼資料備份功能的因應措施步驟。

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

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Symptoms

Dell 受影響的硬體：
Metro node mn114
Metro node mn215
Metro Node - 本機/Metro

Dell 受影響的軟體：
Metro node 作業系統 8.0.0.0.0.267
、Metro Node 作業系統 8.0.0.1.0.21
、Metro Node 作業系統 8.0.1.0.0.220

受影響的變更活動：
升級至 Metro Node 作業系統 8.0.x 後

問題：

可使用 ndu pre-check 命令會針對 Metro 節點組態中的每個叢集回報以下錯誤：

叢集 1 的範例：

VPlexcli:/> ndu pre-check
Warning:
During the NDU process, multiple directors will be offline for a portion of the time.
This is non-disruptive but is dependent on a host-based multipathing solution being
installed, configured, and operating on all connected hosts.
================================================================================
Performing NDU pre-checks
================================================================================
Verify NDU is not in progress..                                            OK
Verify that the directors have been running continuously for 15 days..     OK
Verify director communication status..                                     OK
. . .
Verify meta-volume backup configuration..                                  ERROR
. . .
================================================================================
Errors (x errors found)
================================================================================
cluster-1
     Metadata backups are NOT created according to schedule
     Last backup: Mon Aug 19 00:00:00 UTC 20xx
     Current time: Fri Dec 13 03:41:33 UTC 20xx
     There has been no metadata backup for 116 day(s)
     Run 'metadatabackup local' on cluster-1

叢集 2 的範例：

VPlexcli:/> ndu pre-check
Warning:
During the NDU process, multiple directors will be offline for a portion of the time.
This is non-disruptive but is dependent on a host-based multipathing solution being
installed, configured, and operating on all connected hosts.
================================================================================
Performing NDU pre-checks
================================================================================
Verify NDU is not in progress..                                            OK
Verify that the directors have been running continuously for 15 days..     OK
Verify director communication status..                                     OK
. . .
Verify meta-volume backup configuration..                                  ERROR
. . .
================================================================================
Errors (x errors found)
================================================================================
cluster-2
     Metadata backups are NOT created according to schedule
     Last backup: Sat Mar 16 01:30:00 UTC 20xx
     Current time: Fri Dec 13 03:41:33 UTC 20xx
     There has been no metadata backup for 272 day(s)
     Run 'metadatabackup local' on cluster-2

命令 ll ~system-volumes 命令執行時，中繼資料備份磁碟區日期會反映先前的日期。

在以下範例中，中繼資料備份在 Metro 環境中的兩個叢集上都停止運作：

VPlexcli:/> ll ~system-volumes
/clusters/cluster-1/system-volumes:

Name                                     Volume Type     Operational  Health  Active  Ready  Geometry  Component  Block     Block  Capacity  Slots

---------------------------------------  --------------  Status       State   ------  -----  --------  Count      Count     Size   --------  -----

---------------------------------------  --------------  -----------  ------  ------  -----  --------  ---------  --------  -----  --------  -----

meta_C1_xxxxxx                           meta-volume     ok           ok      true    true   raid-1    2          20971264  4K     80G       64000

meta_C1_xxxxxxx_backup_20xx-11-21_01-30  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000
                        \------------/ date and time the last backup was run 

/clusters/cluster-2/system-volumes:

Name                                     Volume Type     Operational  Health  Active  Ready  Geometry  Component  Block     Block  Capacity  Slots

---------------------------------------  --------------  Status       State   ------  -----  --------  Count      Count     Size   --------  -----

---------------------------------------  --------------  -----------  ------  ------  -----  --------  ---------  --------  -----  --------  -----

meta_C2_xxxxxx                           meta-volume     ok           ok      true    true   raid-1    2          20971264  4K     80G       64000

meta_C2_xxxxxxx_backup_20xx-11-20_12-43  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000
                       \------------/ date and time the last backup was run

症狀：

中繼資料備份會在 Metro 環境中的兩個叢集上停止運作。
中繼資料 備份會在 Metro 環境中的任一叢集上停止運作
中繼資料備份在本機叢集中停止運作

Cause

在排定的每日中繼資料備份期間，服務「daily_metadata_backup.service」偶爾會卡在導向器-1-1-A、director-2-1-A 或兩者上的啟用狀態。

Resolution

永久解決方案：

Metro Node 工程部門正在調查此問題。有可用的修正程式時，就會更新本文。

因應措施：

若要檢查服務「daily_metadata_backup.service」的狀態，請在命令提示符下執行以下命令： sudo systemctl status daily_metadata_backup.service 在 A 節點上，例如導向器-1-1-A 或導向器-2-1-A。檢查並確認「Active： acactivation （start）」屬性存在，且執行時間超過一分鐘。如果是，則表示此服務卡在該特定 A 節點上。

以下範例顯示導向器-1-1-A 和導向器-2-1-A 均具有服務「daily_metadata_backup.service」屬性「Active： acactivation （start）」，且已執行超過一分鐘，表示此服務停滯在這些節點上，如下所示。

叢集-1：

service@director-2-1-a:~> sudo systemctl status daily_metadata_backup.service
● daily_metadata_backup.service - metronode automated daily metadata backups
     Loaded: loaded (/etc/systemd/system/daily_metadata_backup.service; static)
     Active: activating (start) since Sat 2024-10-xx 01:30:18 UTC; 1 month 3 days ago   <---------------------------
TriggeredBy: ● daily_metadata_backup.timer
   Main PID: 22553 (daily_metadata_)
      Tasks: 1
     CGroup: /system.slice/daily_metadata_backup.service
             └─22553 /usr/bin/python3 /opt/dell/vplex/sbin/daily_metadata_backup.py
Oct xx 01:30:18 director-2-1-a systemd[1]: Starting metronode automated daily metadata backups...
.
.
.
<truncated>

叢集-2：

service@director-1-1-a:~> sudo systemctl status daily_metadata_backup.service
● daily_metadata_backup.service - metronode automated daily metadata backups
     Loaded: loaded (/etc/systemd/system/daily_metadata_backup.service; static)
     Active: activating (start) since Sat 2024-10-xx 01:30:18 UTC; 1 month 2 days ago   <---------------------------
TriggeredBy: ● daily_metadata_backup.timer
   Main PID: 22553 (daily_metadata_)
      Tasks: 1
     CGroup: /system.slice/daily_metadata_backup.service
             └─22553 /usr/bin/python3 /opt/dell/vplex/sbin/daily_metadata_backup.py
Oct xx 01:30:18 director-1-1-a systemd[1]: Starting metronode automated daily metadata backups...
.
.
.
<truncated>

在 A 節點上檢查服務「daily_metadata_backup.timer」的狀態（例如，director-1-1-A、director-2-1-A）旁，執行下列命令： sudo systemctl status daily_metadata_backup.timer 並確認「觸發器：」屬性顯示為「n/a」。如果是，則表示此服務卡在該特定 A 節點上。

下列範例顯示 director-1-1-A 和 director-2-1-A 都有服務「daily_metadata_backup.timer」屬性「Trigger：」，顯示為「n/a」，表示此服務卡在這些節點上。

叢集-1：

service@director-1-1-a:~> sudo systemctl status daily_metadata_backup.timer
● daily_metadata_backup.timer - metronode automated daily metadata backups
Loaded: loaded (/etc/systemd/system/daily_metadata_backup.timer; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/daily_metadata_backup.timer.d
└─daily_backup.conf
Active: active (running) since Wed 2024-11-20 12:46:10 UTC; 18h ago
Trigger: n/a                       <<<<<<<<<<<<
Triggers: ● daily_metadata_backup.service
Nov 20 12:46:10 director-1-1-a systemd[1]: Started metronode automated daily metadata backups.
service@director-1-1-a:~>

叢集-2：

service@director-2-1-a:~> sudo systemctl status daily_metadata_backup.timer
● daily_metadata_backup.timer - metronode automated daily metadata backups
Loaded: loaded (/etc/systemd/system/daily_metadata_backup.timer; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/daily_metadata_backup.timer.d
└─daily_backup.conf
Active: active (running) since Wed 2024-11-xx 12:46:10 UTC; 18h ago
Trigger: n/a                           >>>>>>>>>>>>>>>>>>>>>>>
Triggers: ● daily_metadata_backup.service
Nov xx 12:46:10 director-2-1-a systemd[1]: Started metronode automated daily metadata backups.
service@director-2-1-a:~>

確認哪個節點（或可能兩個節點）停滯了提到的兩個服務後，請停止服務“daily_metadata_backup.service”和“daily_metadata_backup.timer”，然後啟動“daily_metadata_backup.timer”服務以解決這種情況並使元數據備份開始運行。

注意：請勿使用「restart」命令選項

在以下範例中，由於兩個 A 節點都受到影響，因此會按如下方式停止和啟動服務：
```
sudo systemctl stop daily_metadata_backup.service
```
```
sudo systemctl stop daily_metadata_backup.timer
```
```
sudo systemctl start daily_metadata_backup.timer
```

執行下列命令以檢查狀態，確認其不再停滯，如下所示：

以下範例顯示如何執行「daily_metadata_backup.service」的狀態命令，以檢查「Active： inactive （dead）」行是否表示服務確實未執行，而在等待中繼資料的下一個備份週期時，該行為「inactive （dead）」：

service@director-2-1-a:~> sudo systemctl status daily_metadata_backup.service
● daily_metadata_backup.service - metronode automated daily metadata backups
     Loaded:  loaded (/etc/systemd/system/daily_metadata_backup.service; static)
     Active: inactive (dead) since Fri 2024-11-22 21:07:41 UTC; 1min 49s ago          >>>>>>>>>>>>
TriggeredBy: ● daily_metadata_backup.timer
    Process: 9183 ExecStart=/opt/dell/vplex/sbin/daily_metadata_backup.py (code=exited, status=0/SUCCESS)
   Main PID: 9183 (code=exited, status=0/SUCCESS)
Nov 22 21:07:36 director-2-1-a systemd[1]: Starting metronode automated daily metadata backups...
Nov 22 21:07:41 director-2-1-a systemd[1]: daily_metadata_backup.service: Succeeded.
Nov 22 21:07:41 director-2-1-a systemd[1]: Finished metronode automated daily metadata backups.
service@director-2-1-a:~>

service@director-1-1-a:~> sudo systemctl status daily_metadata_backup.service
● daily_metadata_backup.service - metronode automated daily metadata backups
     Loaded:  loaded (/etc/systemd/system/daily_metadata_backup.service; static)
     Active: inactive (dead) since Fri 2024-11-22 21:07:41 UTC; 1min 49s ago          >>>>>>>>>>>>
TriggeredBy: ● daily_metadata_backup.timer
    Process: 9183 ExecStart=/opt/dell/vplex/sbin/daily_metadata_backup.py (code=exited, status=0/SUCCESS)
   Main PID: 9183 (code=exited, status=0/SUCCESS)
Nov 22 21:07:36 director-1-1-a systemd[1]: Starting metronode automated daily metadata backups...
Nov 22 21:07:41 director-1-1-a systemd[1]: daily_metadata_backup.service: Succeeded.
Nov 22 21:07:41 director-1-1-a systemd[1]: Finished metronode automated daily metadata backups.
service@director-2-1-a:~>

以下範例顯示服務「daily_metadata_backup.timer」應為「active（waiting）」，而「觸發器」應設為目前或目前，表示服務現在如預期運作：

service@director-2-1-a:~> sudo systemctl status daily_metadata_backup.timer
● daily_metadata_backup.timer - metronode automated daily metadata backups
     Loaded: loaded (/etc/systemd/system/daily_metadata_backup.timer; enabled; vendor preset: disabled)
    Drop-In: /etc/systemd/system/daily_metadata_backup.timer.d
             └─daily_backup.conf
     Active: active (waiting) since Fri 2024-11-22 21:09:24 UTC; 14s ago   >>>>>>>>>>>
    Trigger: Sat 2024-11-23 01:30:00 UTC; 4h 20min left   >>>>>>>>>>>
   Triggers: ● daily_metadata_backup.service
Nov 22 21:09:24 director-2-1-a systemd[1]: Started metronode automated daily metadata backups.
service@director-2-1-a:~>

service@director-1-1-a:~> sudo systemctl status daily_metadata_backup.timer
● daily_metadata_backup.timer - metronode automated daily metadata backups
     Loaded: loaded (/etc/systemd/system/daily_metadata_backup.timer; enabled; vendor preset: disabled)
    Drop-In: /etc/systemd/system/daily_metadata_backup.timer.d
             └─daily_backup.conf
     Active: active (waiting) since Fri 2024-11-22 21:09:24 UTC; 14s ago   >>>>>>>>>>>
    Trigger: Sat 2024-11-23 01:30:00 UTC; 4h 20min left   >>>>>>>>>>>
   Triggers: ● daily_metadata_backup.service
Nov 22 21:09:24 director-1-1-a systemd[1]: Started metronode automated daily metadata backups.
service@director-2-1-a:~>

等待並監控下一個中繼資料備份是否完成，方法是執行 ll ~system-volumes 命令以確認問題已解決，且中繼資料備份已成功執行，如下所示。

範例：

VPlexcli:/> ll ~system-volumes
/clusters/cluster-1/system-volumes:

Name                                     Volume Type     Operational  Health  Active  Ready  Geometry  Component  Block     Block  Capacity  Slots

---------------------------------------  --------------  Status       State   ------  -----  --------  Count      Count     Size   --------  -----

---------------------------------------  --------------  -----------  ------  ------  -----  --------  ---------  --------  -----  --------  -----

meta_C1_xxxxxx                           meta-volume     ok           ok      true    true   raid-1    2          20971264  4K     80G       64000
meta_C1_xxxxxxx_backup_2024-11-23_01-30  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000
meta_C1_4UQT429_backup_2024-11-24_01-30  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000

/clusters/cluster-2/system-volumes:

Name                                     Volume Type     Operational  Health  Active  Ready  Geometry  Component  Block     Block  Capacity  Slots

---------------------------------------  --------------  Status       State   ------  -----  --------  Count      Count     Size   --------  -----

---------------------------------------  --------------  -----------  ------  ------  -----  --------  ---------  --------  -----  --------  -----

meta_C2_xxxxxx                           meta-volume     ok           ok      true    true   raid-1    2          20971264  4K     80G       64000
meta_C2_xxxxxxx_backup_2024-11-23_12-43  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000
meta_C2_xxxxxxx_backup_2024-11-24_12-43  meta-volume     ok           ok      false   true   raid-1    1          20971264  4K     80G       64000

Affected Products

metro node

Products

metro node mn-114, metro node mn-215

Article Number: 000264665

Article Type: Solution

Last Modified: 22 Apr 2025

Version: 4

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Metro Node：升級至 8.0.x 後，中繼資料備份停止運作

Summary: 本文討論升級至 8.0.x 程式碼後，中繼資料備份無法運作的問題。本文提供還原中繼資料備份功能的因應措施步驟。

Symptoms

Cause

Resolution

永久解決方案：

Affected Products

Products

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Metro Node：升級至 8.0.x 後，中繼資料備份停止運作

Summary: 本文討論升級至 8.0.x 程式碼後，中繼資料備份無法運作的問題。本文提供還原中繼資料備份功能的因應措施步驟。

Detailed Article

Symptoms

Cause

Resolution

Affected Products

Symptoms

Cause

Resolution

永久解決方案：

Affected Products

Products

Article Properties

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