Every once in a while, we need to apply mass upgrades to our servers for various security and other upgrades.
Owner: Fedora Infrastructure Team
Contact: #fedora-admin, sysadmin-main, email@example.com, #fedora-noc
Location: All over the world.
Purpose: Apply kernel/other upgrades to all of our servers
- Determine which host group you are going to be doing updates/reboots on.
- Group "A" are servers that end users will see or note being down and anything that depends on them.
- Group "B" are servers that contributors will see or note being down and anything that depends on them.
- Group "C" are servers that infrastructure will notice are down, or are redundent enough to reboot some with others taking the load.
- Appoint an 'Update Leader' for the updates.
- Follow the Outage Infrastructure SOP and send advance notification to the appropriate lists. Try to schedule the update at a time when many admins are around to help/watch for problems and when impact for the group affected is less. Do NOT do multiple groups on the same day if possible.
- Plan an order for rebooting the machines considering two factors:
- Location of systems on the kvm or xen hosts. [You will normally reboot all systems on a host together]
- Impact of systems going down on other services, operations and users. Thus since the database servers and nfs servers are the backbone of many other systems, they and systems that are on the same xen boxes would be rebooted before other boxes.
- To aid in organizing a mass upgrade/reboot with many people helping, it may help to create a checklist of machines in a gobby document.
- Schedule downtime in nagios.
- Make doubly sure that various app owners are aware of the reboots
Any updates that can be tested in staging or a pre-production environment should be tested there first. Including new kernels, updates to core database applications / libraries. Web applications, libraries, etc.
While this may not be a complete list, here are some special things that must be taken into account before rebooting certain systems:
Before the following machines are rebooted, all koji builders should be disabled and all running jobs allowed to complete:
Builders can be removed from koji, updated and re-added. Use:
koji disable-host NAME
koji enable-host NAME
(note: you must be a koji admin).
The following machines require post-boot actions (mostly entering passphrases). Make sure admins that have the passphrases are on hand for the reboot:
- backup-2 (LUKS passphrase on boot)
- sign-vault01 (NSS passphrase for sigul service)
- sign-bridge01 (NSS passphrase for sigul bridge service)
Each update should have a Leader appointed. This person will be in charge of doing any read-write operations, and delegating to others to do tasks. If you aren't specficially asked by the Leader to reboot or change something, please don't. The Leader will assign out machine groups to reboot, or ask specific people to look at machines that didn't come back up from reboot or aren't working right after reboot. It's important to avoid multiple people operating on a single machine in a read-write manner and interfering with changes.
Group A reboots
Group A machines are end user critical ones. Outages here should be planned at least a week in advance and announced to the announce list.
List of machines currently in A group (note: this is going to be automated):
retrace01.fedoraproject.org torrent01.fedoraproject.org ibiblio01.fedoraproject.org people02.fedoraproject.org internetx01.fedoraproject.org collab1.fedoraproject.org serverbeach2.fedoraproject.org hosted1.fedoraproject.org serverbeach4.fedoraproject.org telia1.fedoraproject.org insight01.phx2.fedoraproject.org virthost02.phx2.fedoraproject.org db05.phx2.fedoraproject.org virthost03.phx2.fedoraproject.org db02.phx2.fedoraproject.org xen15.phx2.fedoraproject.org (due to being on the same virt host as above) ns1.fedoraproject.org app05.fedoraproject.org app6.fedoraproject.org backup02.fedoraproject.org bastion01.phx2.fedoraproject.org fas01.phx2.fedoraproject.org fas02.phx2.fedoraproject.org log02.phx2.fedoraproject.org memcached03.phx2.fedoraproject.org noc02.fedoraproject.org ns02.fedoraproject.org ns04.phx2.fedoraproject.org ns05.fedoraproject.org proxy02.fedoraproject.org proxy04.fedoraproject.org proxy5.fedoraproject.org smtp-mm01.fedoraproject.org smtp-mm03.fedoraproject.org
Group B reboots
This Group contains machines that contributors use. Announcements of outages here should be at least a week in advance and sent to the devel-announce list.
db04.phx2.fedoraproject.org bvirthost01.phx2.fedoraproject.org nfs01.phx2.fedoraproject.org bvirthost02.phx2.fedoraproject.org pkgs01.phx2.fedoraproject.org bvirthost03.phx2.fedoraproject.org kojipkgs01.phx2.fedoraproject.org bxen03.phx2.fedoraproject.org (due to being on the same virt host as one of above) koji01.phx2.fedoraproject.org releng02.phx2.fedoraproject.org
Group C reboots
Group C are machines that infrastructure uses, or can be rebooted in such a way as to continue to provide services to others via multiple machines. Outages here should be announced on the infrastructure list.
app01.stg.phx2.fedoraproject.org app01.dev.fedoraproject.org app02.stg.phx2.fedoraproject.org koji01.stg.phx2.fedoraproject.org noc01.stg.phx2.fedoraproject.org proxy01.stg.phx2.fedoraproject.org releng01.stg.phx2.fedoraproject.org value01.stg.phx2.fedoraproject.org virthost13.phx2.fedoraproject.org publictest01.fedoraproject.org publictest02.fedoraproject.org publictest04.fedoraproject.org publictest05.fedoraproject.org insight01.dev.fedoraproject.org fakefas01.fedoraproject.org proxy6.fedoraproject.org osuosl1.fedoraproject.org proxy07.fedoraproject.org bodhost01.fedoraproject.org bnfs01.phx2.fedoraproject.org bxen01.phx2.fedoraproject.org dhcp02.c.fedoraproject.org cnode01.fedoraproject.org compose-x86-01.phx2.fedoraproject.org download01.phx2.fedoraproject.org download02.phx2.fedoraproject.org download03.phx2.fedoraproject.org download04.phx2.fedoraproject.org download05.phx2.fedoraproject.org app07.phx2.fedoraproject.org fas03.phx2.fedoraproject.org insight01.stg.phx2.fedoraproject.org secondary02.phx2.fedoraproject.org smolt01 noc01.phx2.fedoraproject.org virthost01.phx2.fedoraproject.org serverbeach1.fedoraproject.org hosted2.fedoraproject.org serverbeach5.fedoraproject.org collab2.fedoraproject.org serverbeach3.fedoraproject.org app02.phx2.fedoraproject.org db01.stg.phx2.fedoraproject.org memcached01.phx2.fedoraproject.org xen09.phx2.fedoraproject.org bapp01.phx2.fedoraproject.org ns03.phx2.fedoraproject.org xen04.phx2.fedoraproject.org dhcp01.phx2.fedoraproject.org koji02.phx2.fedoraproject.org releng01.phx2.fedoraproject.org bxen04.phx2.fedoraproject.org bastion02.phx2.fedoraproject.org proxy01.phx2.fedoraproject.org value01.phx2.fedoraproject.org xen05.phx2.fedoraproject.org proxy3.fedoraproject.org smtp-mm02.fedoraproject.org tummy1.fedoraproject.org app03.phx2.fedoraproject.org value02.phx2.fedoraproject.org xen07.phx2.fedoraproject.org app04.phx2.fedoraproject.org fas01.stg.phx2.fedoraproject.org pkgs01.stg.phx2.fedoraproject.org xen03.phx2.fedoraproject.org secondary01.phx2.fedoraproject.org xen11.phx2.fedoraproject.org puppet01.phx2.fedoraproject.org app01.phx2.fedoraproject.org xen14.phx2.fedoraproject.org (disable each builder in turn, update and reenable). ppc05.phx2.fedoraproject.org ppc06.phx2.fedoraproject.org ppc07.phx2.fedoraproject.org ppc08.phx2.fedoraproject.org ppc09.phx2.fedoraproject.org ppc10.phx2.fedoraproject.org ppc12.phx2.fedoraproject.org x86-01.phx2.fedoraproject.org x86-02.phx2.fedoraproject.org x86-03.phx2.fedoraproject.org x86-04.phx2.fedoraproject.org x86-05.phx2.fedoraproject.org x86-06.phx2.fedoraproject.org x86-07.phx2.fedoraproject.org x86-09.phx2.fedoraproject.org x86-10.phx2.fedoraproject.org x86-11.phx2.fedoraproject.org x86-12.phx2.fedoraproject.org x86-13.phx2.fedoraproject.org x86-14.phx2.fedoraproject.org x86-15.phx2.fedoraproject.org x86-16.phx2.fedoraproject.org x86-17.phx2.fedoraproject.org x86-18.phx2.fedoraproject.org backup01 sign-vault01
Doing the upgrade
If possible, system upgrades should be done in advance of the reboot (with relevant testing of new packages on staging). To do the upgrades, make sure that the Infrastructure RHEL repo is updated as necessary to pull in the new packages (Infrastructure Yum Repo SOP)
On puppet1, as root run:
func-yum [--host=hostname] update
--host can be specified multiple times and takes wildcards.
pinging people as necessary if you are unsure about any packages.
Additionally you can see which machines still need rebooted with:
sudo func-command --timeout=10 --oneline /usr/local/bin/needs-reboot.py | grep yes
Doing the reboot
In the order determined above, reboots will usually be grouped by the virtualization hosts that the servers are on. You can see the guests per virt host on puppet01 in /var/log/virthost-lists.out
For each host you will want to:
- connect and verify no one is logged in and using it. If they are contact them to log off, etc
- grep default /etc/grub.conf # make sure that the kernel you upgraded to will be the one rebooted.
- shutdown -h now
This is also a good time to double check that each guest you are starting up is set to be restarted on reboot of the virt host.
- Make sure that everything's running fine
- Reenable nagios notification as needed
- Make sure to perform any manual post-boot setup (such as entering passphrases for encrypted volumes)
- Close outage ticket.