# 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.debian.org
   * on handel: puppet node deactivate $HOST.debian.org
   * 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

```
echo -n "multipath device to remove: " &&
export LC_ALL=C &&
read path &&
dm=$(sudo multipath -ll | grep "$path " | awk '{print $3}') &&
cd /sys/devices/virtual/block/$dm/slaves &&
devices=$(ls -1) &&
blockdev --flushbufs /dev/$dm &&
multipath -f $path &&
for device in $(echo $devices); do blockdev --flushbufs /dev/$device; echo 1 > "/sys/block/$device/device/delete"; done
```

   * remove the paths in the MSA

Three months after decomissioning:
 * Remove backups