Difference between revisions of "August 2018 Power Outage Plan"

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There is a planned power outage in MC from Tuesday, August 21 to Friday, August 24.
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There is a planned power outage in MC from Tuesday, August 21 to Wednesday, August 29.
  
 
There is also a one-day outage in DC, which will complicate keeping services up during the entire outage.
 
There is also a one-day outage in DC, which will complicate keeping services up during the entire outage.

Revision as of 16:39, 19 July 2018

There is a planned power outage in MC from Tuesday, August 21 to Wednesday, August 29.

There is also a one-day outage in DC, which will complicate keeping services up during the entire outage.

Impact

All services in MC for Aug. 21-24, and services in DC for one day during that window.

Services in PHY are not affected (This is redundant DNS and Authentication services. There are no other services (general-use or otherwise) in PHY.). It's also on a different network then MC and DC.

Timeline

Before Monday, August 20

  • Complete plan for outage
  • Send notifications (and reminders) to csc-general
  • Move equipment to DC (if necessary)
  • Take backups of LDAP and Kerberos, and download offsite
  • Take backups of system passwords, and download offsite

Monday, August 20

  • Shutdown general-use computing services
  • Transfer computing services to redundant / temporary systems
  • Revoke access to home directories on aspartame to all machines

Sometime during the outage window

  • Shutdown DC systems before the building outage

After the outage

  • Being restoring normal services

Networking

Our network is announced from both MC and DC. No impact to networking is expected when MC goes offline.

DHCP is hosted in MC (on caffeine). This is not strictly required as our servers use static IPs, but we can move it to DC so it's available.

Systems

Mirror

TODO. Syscom is currently working with CSCF to identify a plan for mirror.

Website

The CSC website is a static site, and will be straightforward to maintain during the outage.

All user and club sites are hosted in home directories (which are unavailable), so we will display an outage page (with a 503 status code).

Mail

Since the outage is for a week, we need to maintain email services during the outage. An initial plan by ztseguin and jxpryde:

  • rsync users' .forward, .procmailrc and .maildir to a local directory on mail, allowing mail to continue as expected

However, this requires:

  • Users not reference any scripts, programs, etc. in their procmailrc file that reference things in their home directory

Authentication

Authentication is located in both MC and PHY.

While the MC node is down, the PHY node can continue to answer to authentication requests. However, updating membership and changing passwords will not be possible.

We may consider moving auth1 to DC for the outage.

DNS

CSC's DNS service is located in both MC and PHY.

We may consider moving the MC DNS node to DC, but this is not necessary to maintain services during the outage.

NOTE: The MC node is the master node, so we will need to ensure that the SOA record contains a long enough expiry time so the PHY doesn't stop serving zones.

Additional Resources