# Infra/node decommissioning

## High overview

This is an overview of the needed tasks to perform when we want to remove a node from our infra : 

  * Delete/reinstall the (virtual) machine (cleaning up)
    * If hosted within Red Hat DC, update [internal ip inventory](https://docs.google.com/spreadsheets/d/1K-aewLJ17z3pRC6K5qyBRJYtNXy1WcxRSVwPkGf4NXQ) (Obviously need RH SSO and permission)
  * Remove from [DNS](/infra/dns/) (public or internal, depending on the case and don't forget to also remove from PowerDNS if record is delegated to that dns infra, see below)
  * Remove it from Ansible inventory (and search for references for that node in case of)
  * Remove it from Zabbix monitoring
  * (optional and if sponsored : remove sponsor logo from [website git repo](https://git.centos.org/centos/centos.org) )

Worth knowing that if node is used in one of the [mirror,mirror.stream,vault,debuginfo] roles, it needs to be also removed from the sqlite DB used to generate the dynamic powerdns setup.

```
host="centost8.centos.org"
pushd /var/lib/centos-infra/
echo "delete from nodes where fqdn='${host}';" | sqlite3 nodes.db
./gen_backend
popd
```