# Decomissioning hosts

 * Get rid of any services running on the host.
 * Optional, shut down the machine, then wait a month
 * Zero disks

    badblocks -v -s -p 5 -w -f DEVICE_GOES_HERE

 * Revoke puppet certificate

   * on handel: puppet node clean $HOST
   * reinit samhain on handel

 * Remove from LDAP
   * including references such as subgroup: foo@hostname or supplementarygid: foo@hostname
   * rerun puppet on backuphost / the backup host
   * reinit samhain on backuphost
 * Remove from Nagios
 * Remove any references from puppet configuration
 * Remove references to the host from DNS files, including reverse DNS
 * Get rid of the HW (tell the hoster to get rid of it or other as appropriate)
 * Update password file information for the $HOST
 * Remove MQ queues related to machine (see [[doc/mq]] for details)

    for queue in $(rabbitmqadmin -N rainier list queues name | \
    grep unger.debian.org | \
    awk '{print $2}') ; do
    rabbitmqadmin -N rainier -V dsa delete queue name=$queue
    done

 * Remove disks from the MSA 
   * run multipath -ll on the KVM host and find all disks on that multipath

```
    finzi-srv (3600c0ff00027786c874edd5701000000) dm-52 HP,MSA 2040 SAN
    size=75G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='0' wp=rw
    |-+- policy='service-time 0' prio=50 status=active
    | |- 1:0:2:4  sdeu 129:96  active ready running
    | |- 1:0:3:4  sdhu 134:64  active ready running
    | |- 2:0:0:4  sdaa 65:160  active ready running
    | `- 2:0:2:4  sdfz 131:80  active ready running
    `-+- policy='service-time 0' prio=10 status=enabled
      |- 1:0:0:4  sdf  8:80    active ready running
      |- 1:0:1:4  sdbu 68:128  active ready running
      |- 2:0:1:4  sdcz 70:112  active ready running
      `- 2:0:3:4  sdja 8:320   active ready running
   
```
   * for each disk in those multipath run

     echo 1 > /sys/block/sdX/device/delete

   * once done, remove that multpath-device from multipath

     multipath -f finzi-srv

   * remove the paths in the MSA

Three months after decomissioning:
 * Remove backups