Add howto for restarting server in datacenter

Signed-off-by: Michal Konecny <mkonecny@redhat.com>

modules/howtos/pages/restart_datacenter_server.adoc

@@ -0,0 +1,36 @@
+= How to restart the server in datacenter
+
+This guide is for restarting machines in IAD2 datacenter using `ipmitool`.
+This only applies to bare hardware instances
+(see link:https://pagure.io/fedora-infra/ansible/blob/main/f/inventory/hardware[ansible inventory]).
+
+[NOTE]
+====
+You need to have access to Bitwarden with Fedora Infrastructure
+passwords to be able to follow this guide.
+====
+
+. Login to noc01
++
+----
+$ ssh noc01.iad2.fedoraproject.org
+----
++
+. Restart machine
++
+----
+$ ipmitool -U admin -H <host>.mgmt.iad2.fedoraproject.org -I lanplus chassis power reset
+----
+
+[NOTE]
+====
+For access to console use
+`ipmitool -U admin -H <host>.mgmt.iad2.fedoraproject.org -I lanplus sol activate`.
+
+To exit the console you need to use `~.` This is a SSH disconnect sequence, so you need to add as
+many `~` as ssh jump hosts used.
+
+For instance, if you ssh to batcave01 -> noc01 -> ipmitool
+`~.` will disconnect you from batcave01, `~~.` will disconnect you from noc01 and `~~~.`
+will disconnect you from the ipmi console.
+====

modules/sysadmin_guide/pages/index.adoc

@@ -220,6 +220,7 @@ In this section is list of guides for common tasks that are done in Fedora Infra
 * xref:howtos:remove_fedora_user_at_launch_aws.adoc[How to add allow root ssh login and remove fedora user]
 * xref:howtos:remove_user_from_watchlist_pagure.adoc[How to remove someone from a watch list on Pagure]
 * xref:howtos:restart_sigul_bridge.adoc[How to restart the sigul bridge]
+* xref:howtos:restart_datacenter_server.adoc[How to restart server in datacenter]
 * xref:howtos:scale_up_or_down_deployment.adoc[How to scale up/down a deployment in OpenShift]
 * xref:howtos:share_tmux_session.adoc[How to share a tmux session accross users]
 * xref:howtos:unblock_bodhi_rawhide_updates.adoc[How to unblock Bodhi rawhide updates]