Metro-node: Efter opgradering til 8.0.x holder sikkerhedskopieringen af metadata op med at fungere

Summary: Denne artikel omhandler det problem, hvor sikkerhedskopieringen af metadata bliver ikke-operationel efter opgraderingen til 8.0.x-kode. Denne artikel indeholder de praktiske trin til gendannelse af funktionen til sikkerhedskopiering af metadata. ...

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Symptoms

Hardware, der er påvirket af Dell:
Metronode mn114
Metronode mn215
Metro Node-Local/Metro

Dell-påvirket software:
Metro-node OS 8.0.0.0.0.267
, Metro-node OS 8.0.0.1.0.21
, Metro-node OS 8.0.1.0.0.220

Påvirkede ændringsaktiviteter:
Efter opgradering til metronode OS 8.0.x

Problem:

  1. Ikonet ndu pre-check kommando rapporterer nedenstående fejl for hver klynge i en metronodekonfiguration:

    Eksempel på klynge-1:

    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

    Eksempel på klynge 2:

    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. Når du beordrer ll ~system-volumes køres, afspejler datoen for sikkerhedskopiering af metadata en tidligere dato.

    I nedenstående eksempel holder sikkerhedskopieringen af metadata op med at fungere på begge klynger i et Metro-miljø:

    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

Symptomer:

  • Sikkerhedskopieringen af metadata holder op med at fungere på begge klynger i et Metro-miljø.
  • Sikkerhedskopieringen af metadata holder op med at fungere på en af klyngerne i et Metro-miljø
  • Sikkerhedskopieringen af metadata holder op med at fungere i en lokal klynge

 

Cause

Under den planlagte daglige sikkerhedskopiering af metadata sidder tjenesten "daily_metadata_backup.service" lejlighedsvis fast i aktiveringstilstanden på enten director-1-1-A, director-2-1-A eller begge.

 

Resolution

Permanent afhjælpning:

Metro node Engineering undersøger dette problem. Når en rettelse er tilgængelig, opdateres denne artikel.

Løsning:

  1. For at kontrollere status for tjenesten "daily_metadata_backup.service" ved Shell-prompten skal du køre kommandoen, sudo systemctl status daily_metadata_backup.service på en A-node, f.eks. direktør-1-1-A eller direktør-2-1-A. Kontroller og bekræft, at attributten "Aktiv: aktivering (start)" er til stede, og at den kører længere end et minut. Hvis ja, betyder det, at denne tjeneste sidder fast på den pågældende A-node.

    Nedenstående eksempel viser, at director-1-1-A og director-2-1-A begge har attributten "service" "daily_metadata_backup.service" "Active: activating (start)" til stede og har kørt længere end et minut, hvilket betyder, at denne tjeneste sidder fast på disse noder som vist nedenfor.

    Klynge-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>

    Klynge-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. Ved siden af for at kontrollere status for tjenesten "daily_metadata_backup.timer" på A-node, for eksempel director-1-1-A, director-2-1-A, kør kommandoen sudo systemctl status daily_metadata_backup.timer og bekræfte, at attributten "Udløser:" vises som "i/t." Hvis ja, betyder det, at denne tjeneste sidder fast på den pågældende A-node.

    Nedenstående eksempel viser, at director-1-1-A og director-2-1-A begge har attributten "daily_metadata_backup.timer" "Trigger:", der vises som "n/a", hvilket betyder, at denne tjeneste sidder fast på disse noder.

    Klynge-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:~>

    Klynge-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. Når det er bekræftet, hvilken node, eller muligvis begge noder, der har de to nævnte tjenester fast, skal du stoppe tjenesterne "daily_metadata_backup.service" og "daily_metadata_backup.timer" og derefter starte tjenesten for "daily_metadata_backup.timer" for at løse denne situation og for at metadatasikkerhedskopieringen begynder at fungere.

    BEMÆRK: Brug ikke kommandoindstillingen "genstart".

    I nedenstående eksempel, da begge A-noder er berørt, stoppes og startes tjenesterne som følger:

    sudo systemctl stop daily_metadata_backup.service
    sudo systemctl stop daily_metadata_backup.timer
    sudo systemctl start daily_metadata_backup.timer

  4. Kør nedenstående kommando for at kontrollere status for at bekræfte, at den ikke sidder fast længere som følger:

    Nedenstående eksempler viser kørslen af statuskommandoen for "daily_metadata_backup.service" for at kontrollere, om linjen "Aktiv: inaktiv (død)", der angiver, at tjenesten faktisk ikke kører, hvilket, når du venter på den næste sikkerhedskopieringscyklus af metadataene, er "inaktiv (død)":

    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:~>

    Nedenstående eksempel viser, at tjenesten "daily_metadata_backup.timer" skal være "aktiv(venter)", og "Udløser" skal indstilles til i dag eller nu, hvilket betyder, at tjenesten nu fungerer som forventet:

    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. Vent, og overvåg, indtil den næste sikkerhedskopiering af metadata fuldføres ved at køre ll ~system-volumes til at bekræfte, at problemet er blevet løst, og at sikkerhedskopiering af metadata udføres korrekt på følgende måde.

    Eksempel:

    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 Properties
Article Number: 000264665
Article Type: Solution
Last Modified: 22 Apr 2025
Version:  4
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