Page MenuHomePhabricator

decommission db1110.eqiad.wmnet
Closed, ResolvedPublicRequest


This task will track the decommission-hardware of server db1110.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) [2023-04-19T06:41:22Z] <marostegui@cumin1001> dbctl commit (dc=all): 'Depool db1110 T335011', diff saved to and previous config saved to /var/cache/conftool/dbconfig/20230419-064122-root.json

I am going to repool this host as we have the DC switch next week, there's no benefit in decommissioning it today or tomorrow anyways. Better to have more power in case we run into spikes.

Mentioned in SAL (#wikimedia-operations) [2023-05-03T07:36:03Z] <marostegui@cumin1001> dbctl commit (dc=all): 'Depool db1110 T335011', diff saved to and previous config saved to /var/cache/conftool/dbconfig/20230503-073602-root.json

Change 914702 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] db1110: Disable notifications

Change 914702 merged by Marostegui:

[operations/puppet@production] db1110: Disable notifications

Marostegui changed the task status from Open to Stalled.May 3 2023, 7:43 AM

Stalling until T335092 and T333885 are done

Change 914703 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] db1118,db1110: Update notes

Change 914703 merged by Marostegui:

[operations/puppet@production] db1118,db1110: Update notes

Change 914765 had a related patch set uploaded (by Marostegui; author: Marostegui):

[operations/puppet@production] instances.yaml: Remove db1110

Change 914765 merged by Marostegui:

[operations/puppet@production] instances.yaml: Remove db1110

Mentioned in SAL (#wikimedia-operations) [2023-05-03T11:51:24Z] <marostegui@cumin1001> dbctl commit (dc=all): 'Remove db1110 from dbctl T335011', diff saved to and previous config saved to /var/cache/conftool/dbconfig/20230503-115124-marostegui.json

Marostegui moved this task from Blocked to Ready on the DBA board.

This is ready

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 T335011 db1110.eqiad.wmnet
  • Merge the puppet patch
  • Remove from zacillo
    • In IRC: !log Removing db1110 from zarcillo T335011
    • In cumin: sudo db-mysql db1215 -A zarcillo
set binlog_format='ROW';
delete from servers where hostname="db1110";
delete from instances where name like 'db1110%';
delete from section_instances where instance like 'db1110%';
  • Remove host from orchestrator
  • Update the task and hand it over to dcops

Change 919070 had a related patch set uploaded (by Ladsgroup; author: Amir Sarabadani):

[operations/puppet@production] Remove db1110

cookbooks.sre.hosts.decommission executed by ladsgroup@cumin1001 for hosts: db1110.eqiad.wmnet

  • db1110.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 919070 merged by Ladsgroup:

[operations/puppet@production] Remove db1110

Mentioned in SAL (#wikimedia-operations) [2023-05-11T16:01:56Z] <Amir1> Removing db1110 from zarcillo T335011

Ladsgroup edited projects, added ops-eqiad; removed Patch-For-Review.
Ladsgroup moved this task from Ready to Done on the DBA board.
Ladsgroup added a subscriber: Ladsgroup.
Jclark-ctr updated the task description. (Show Details)