Metro Node：升級至 8.0.x 後，中繼資料備份停止運作

摘要: 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。

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症狀

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：

  1. 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

  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

 

原因

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。

 

解析度

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：

  1. 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>

  2. 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:~>

  3. 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

  4. 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:~>

  5. 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

 

受影響的產品

metro node

產品

metro node mn-114, metro node mn-215
文章屬性
文章編號: 000264665
文章類型: Solution
上次修改時間: 22 4月 2025
版本:  4
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