Outage Infrastructure SOP
(Imported from MoinMoin)
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Revision as of 16:28, 24 May 2008
Outage: Standard Operating Procedure
Owner: Fedora Infrastructure Team
Contact: #fedora-admin, sysadmin-main group
Purpose: This SOP is generic for any outage
Users (No Access)
Don't have shell access? Doesn't mater. Stop by and stay in #fedora-admin if you have any expertise in what is going on, please assist. Random users have helped the team out countless numbers of times. Any time the team doesn't have to go to the docs to look up an answer is a time they can be spending fixing what's busted.
If a planned outage comes at a terrible time, just let someone know. The Infrastructure Team does its best to keep outages out of the way but if there's a mass rebuild going on that we don't know about and we schedule a koji outage, let someone know.
Pretty much all coordination occurs in #fedora-admin on irc.freenode.net. Stop by there to watch more about what's going on. Just stay on topic.
Think something is busted? Please check with others to see if they are also having issues. This could even include checking on another computer. When reporting an outage remember that the admins will typically drop everything they are doing to check what the problem is. They won't be happy to find out your cert has expired or you're using the wrong username.
Reporting or participating in an outage
If you think you've found an outage, get as much information as you can about it at a glance. Copy any errors you get to http://pastebin.ca/. Use the following guidelines:
- Don't be general.
- "The wiki is acting slow"
- (./) "Whenever I try to save http://fedoraproject.org/wiki/Infrastructure, I get a proxy error after 60 seconds"
- Don't report an outage that's already been reported.
- "/join #fedora-admin; Is the build system broken?"
- (./) "/join #fedora-admin; wait a minute or two; I noticed I can't submit builds, here's the error I get:"
- Don't suggest drastic or needless changes during an outage (send it to the list)
- "Why don't you just use lighttpd?"
- (./) "You could try limiting MaxRequestsPerChild in Apache"
- Don't get off topic or be too chatty
- "Transformers was awesome, but yeah, I think you guys know what to do next"
- (./) ""
- Do research the technologies we're using and answer questions that may come up.
- "Can't you just fix it?"
- (./) "Hey guys, I think this is what you're looking for: http://httpd.apache.org/docs/2.2/mod/mod_mime.html#addencoding"
Infrastructure Members (Admin Access)
The Infrastructure Members section is specifically written for members with access to the servers. This could be admin access to a box or even a specific web application. Basically anyone with access to fix the problem.
Any outage that is intentionally caused by a team member is a planned outage. Even if it has to happen in the next 5 minutes.
All major planned outages should occur with at least 1 week notice. This is not always possible, use best judgment. Please use our standard outage template at: http://fedoraproject.org/wiki/Infrastructure/OutageTemplate
Always create a ticket in the ticketing system: http://fedoraproject.org/wiki/Infrastructure/Tickets Send an email to the fedora-infrastructure-list with more details if warranted.
Remember to follow an existing SOP as much as possible. If anything is missing from the SOP please add it.
Remember to schedule an outage in nagios. This is important not just so notifications don't get sent but also important for trending and reporting. https://admin.fedoraproject.org/nagios/
Report all information in #fedora-admin. Coordination is extremely important, it's rare for our group to meet in person and IRC is our only real-time communication device. If a web site is out please put up some sort of outage page in its place.
Post outage cleanup
Once the outage is over ensure that all services are up and running. Ensure all nagios services are back to green. Notify everyone in #fedora-admin to scan our services for issues. If the outage included a new feature or major change for a group, please notify that group that the change is ready.
Unplanned outages happen, stay cool. As a team member never be afraid to do something because you think you'll get in trouble over it. Be smart, don't be reckless, and never say "I shouldn't do this". If an unorthodox method or drastic change will fix the problem, do it, document it, and let the team know. Messes can always be cleaned up after the outage.
Some outages require immediate fixing, some don't. A page should never go out because someone can't sign the cla. Most of our admins are in US time, use your best judgment. If it's bad enough to warrant an emergency page, page one of the admins at: https://admin.fedoraproject.org/pager
- "I can't see the Recent Changes on the wiki."
- (./) "The entire wiki is not viewable"
- I cannot sign the CLA
- (./) I can't change my password in the account system, I have admin access and my laptop was just stolen
- I can't access awstats for fedoraproject.org
- (./) The mirrors list is down.
- I think someone misspelled some words on the webpage
- (./) The web page has been hacked and I think someone notified slashdot.
After an outage has been verified, acknowledge the outage in nagios: https://admin.fedoraproject.org/nagios/ and head in to #fedora-admin to figure out who is around and coordinate the next course of action. Consult any relevent SOP's for corrective actions.
Fix it, Fix it, Fix it! Do whatever needs to be done to fix the problem, just don't be stupid about it.
Can't fix it? Don't wait, Escalate! All of the team members have expertise with some areas of our environment and weaknesses in other areas. Never be afraid to tap another team member. Sometimes it's required, sometimes it's not. The last layer of defense is to page someone. At present our team is small enough that a full escalation path wouldn't do much good. Consult the contact information on each SOP for more information.
With any outage there will be questions. Please try as hard as possible to answer the following questions and send them to the fedora-infrastructure-list.
1. What happened? 2. What was affected? 3. How long was the outage? 4. What was the root cause?
Number 4 is especially important. If a kernel build keeps failing because of issues with koji caused by a database failure caused by a full filesystem on db1. Don't say koji died because of a db failure. Any time a root cause is discovered and not being monitored by nagios, add it if possible. Most failures can be prevented or mitigated with proper monitoring.