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decommission db2117.codfw.wmnet
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Description

This task will track the decommission-hardware of server db2117.codfw.wmnet

With the launch of updates to the decom cookbook, the majority of these steps can be handled by the service owners directly. The DC Ops team only gets involved once the system has been fully removed from service and powered down by the decommission cookbook.

db2117

Steps for service owner:

  • - all system services confirmed offline from production use
  • - set all icinga checks to maint mode/disabled while reclaim/decommmission takes place. (likely done by script)
  • - remove system from all lvs/pybal active configuration
  • - any service group puppet/hiera/dsh config removed
  • - remove site.pp, replace with role(spare::system) recommended to ensure services offline but not 100% required as long as the decom script is IMMEDIATELY run below.
  • - login to cumin host and run the decom cookbook: cookbook sre.hosts.decommission <host fqdn> -t <phab task>. This does: bootloader wipe, host power down, netbox update to decommissioning status, puppet node clean, puppet node deactivate, debmonitor removal, and run homer.
  • - remove all remaining puppet references and all host entries in the puppet repo
  • - reassign task from service owner to no owner and ensure the site project (ops-sitename depending on site of server) is assigned.

End service owner steps / Begin DC-Ops team steps:

  • - system disks removed (by onsite)
  • - determine system age, under 5 years are reclaimed to spare, over 5 years are decommissioned.
  • - IF DECOM: system unracked and decommissioned (by onsite), update netbox with result and set state to offline
  • - IF DECOM: mgmt dns entries removed.
  • - IF RECLAIM: set netbox state to 'inventory' and hostname to asset tag

Event Timeline

ABran-WMF moved this task from Triage to Ready on the DBA board.

Change 1008815 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] mariadb: Decommission db2117

https://gerrit.wikimedia.org/r/1008815

Change 1008815 merged by Marostegui:

[operations/puppet@production] mariadb: Decommission db2117

https://gerrit.wikimedia.org/r/1008815

Mentioned in SAL (#wikimedia-operations) [2024-03-05T09:12:45Z] <marostegui@cumin1002> dbctl commit (dc=all): 'Remove db2117 T359141', diff saved to https://phabricator.wikimedia.org/P58456 and previous config saved to /var/cache/conftool/dbconfig/20240305-091244-marostegui.json

Marostegui updated the task description. (Show Details)
Marostegui edited projects, added ops-codfw, DC-Ops; removed Patch-For-Review.
Marostegui added a subscriber: Jhancock.wm.

cookbooks.sre.hosts.decommission executed by marostegui@cumin1002 for hosts: db2117.codfw.wmnet

  • db2117.codfw.wmnet (FAIL)
    • Downtimed host on Icinga/Alertmanager
    • Found physical host
    • Downtimed management interface on Alertmanager
    • Unable to connect to the host, wipe of swraid, partition-table and filesystem signatures will not be performed: Cumin execution failed (exit_code=2)
    • Powered off
    • [Netbox] Set status to Decommissioning, deleted all non-mgmt IPs, updated switch interfaces (disabled, removed vlans, etc)
    • Configured the linked switch interface(s)
    • Removed from DebMonitor
    • Removed from Puppet master and PuppetDB

ERROR: some step on some host failed, check the bolded items above

@Jhancock.wm please see above - this host was unreachable due to a crash (T358846) so wiping its boot loader wasn't possible from the decommissioning script. I don't know what is required from your end in this situation - just letting you know.

Unable to connect to the host, wipe of swraid, partition-table and filesystem signatures will not be performed: Cumin execution failed (exit_code=2)

@Volans @MoritzMuehlenhoff is anything else required in this situation?
Thanks!

@Volans @MoritzMuehlenhoff is anything else required in this situation?

I think that's fine, nothing else to be done here. We wipe the bootloader to prevent service interruptions if the server gets accidentally powered on before it's unracked, but the disks will be crumbled anyway.

Thanks! @Jhancock.wm see above, you can proceed whenever you want.

Jhancock.wm claimed this task.
Jhancock.wm updated the task description. (Show Details)