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decommission db1112.eqiad.wmnet
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This task will track the decommission-hardware of server db1112.eqiad.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.


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 DC ops team member and site project (ops-sitename) depending on site of server

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.

Event Timeline

Mentioned in SAL (#wikimedia-operations) [2023-05-16T05:51:23Z] <marostegui@cumin1001> dbctl commit (dc=all): 'Depool db1112 T336332', diff saved to and previous config saved to /var/cache/conftool/dbconfig/20230516-055122-root.json

Change 920142 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] db1112: Disable notifications

Change 920142 merged by Marostegui:

[operations/puppet@production] db1112: Disable notifications

Change 920564 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] db1112: Remove from dbctl

Change 920564 merged by Marostegui:

[operations/puppet@production] db1112: Remove from dbctl

Mentioned in SAL (#wikimedia-operations) [2023-05-17T05:20:07Z] <marostegui@cumin1001> dbctl commit (dc=all): 'Remove db1112 from dbctl T336332', diff saved to and previous config saved to /var/cache/conftool/dbconfig/20230517-052007-marostegui.json

Marostegui updated the task description. (Show Details)
Marostegui added a subscriber: Ladsgroup.

This is ready to go @Ladsgroup

DBA-specific checklist:

  • Remove host from dbctl (done or NA)
  • Make puppet patch cleaning the rest up (DO NOT merge)
  • Run the decommissioning script:
sudo cookbook sre.hosts.decommission -t T336332 db1112.eqiad.wmnet
  • Merge the puppet patch
  • Remove from zacillo
    • In IRC: !log Removing db1112 from zarcillo T336332
    • In cumin: sudo db-mysql db1215 -A zarcillo
set binlog_format='ROW';
delete from servers where hostname="db1112";
delete from instances where name like 'db1112%';
delete from section_instances where instance like 'db1112%';
  • Remove host from orchestrator
  • Update the task and hand it over to dcops

Change 920768 had a related patch set uploaded (by Ladsgroup; author: Amir Sarabadani):

[operations/puppet@production] Remove db1112 from puppet

cookbooks.sre.hosts.decommission executed by ladsgroup@cumin1001 for hosts: db1112.eqiad.wmnet

  • db1112.eqiad.wmnet (WARN)
    • Downtimed host on Icinga/Alertmanager
    • Found physical host
    • Management interface not found on Icinga, unable to downtime it
    • Wiped all swraid, partition-table and filesystem signatures
    • 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

Change 920768 merged by Ladsgroup:

[operations/puppet@production] Remove db1112 from puppet

Mentioned in SAL (#wikimedia-operations) [2023-05-17T19:01:34Z] <Amir1> Removing db1112 from zarcillo T336332

Jclark-ctr updated the task description. (Show Details)