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[[Category:Fedora]][[Category:SOP]][[Category:Fedora ARM Secondary Architecture]]{{Draft}}
=Seneca CDOT ARM Project: Management Server Backup Strategy and Recovery Planplan=Contact info: * Phone: X33463* Email: fedora-arm at senecacollege dot ca
==Scope==
This document is intended for those who are familiar at with administering the ARM Project's management servers. Having knowledge of the CDOT ARM standard operation procedures may lead to a better understanding of this document.
==Purpose==
The purpose of this document is to describe the process for the backup and synchronization of critical data and provide example of some possible disaster recovery scenarios.
The Fedora ARM Project is a highly active R & D project. Because of the rapid change, the project required some specific backup strategies to be implemented on top of regular backup strategies.
In the event of an emergency, this document should provide enough information to re-create a similar management platform that will keep the project running.
==Background==
Like all Fedora projects, the ARM Project has a small yet active global community. The build firm is located in Ontario, Canada. Infrastructure support for the build firm is provided by the Seneca Center for Development and Technology at Seneca College in Toronto. The number of available ARM builders in the firm can vary. The builders are not backed up as those are easily recreated from available images.
As for the management servers, there are four five major ones that are critical to this operation. For a complete list of servers and the services those offer please consult the necessary documents. These four servers are Australia (Koji builders temporary work storage), Chile (The complete ARM repository), Hongkong (Koji hub and web interface), Iraq (Central backup management and storage) and Ireland (Koji database). ==Description==The build backup system in Fedora has been broken into two custom scripts. First one is to create a local copy of the configurations and to back up the repository to removable drives, it is called blaze. The second script is called Koji wildfire and it is to synchronize those local copies to different locations over the network. The servers get the copies of those scripts from the central backup management and storage server (iraq) via scp and runs blaze first and then wildfire. ===Backup Script Source===The scripts are located at (any server with backup enabled): /usr/local/bin/===Backup Directory Structure===The backups (both local copies and there networked synced copies) are multiple components stored inside /archive/blaze-backup (/archive/repo-backup for the repository sync) in each servers respective directory. Example: [root@australia ~]# tree /archive /archive ├── blaze-backup │ ├── australia │ │ ├── australia-cron-Feb-27-2012.tar.bz2 │ │ ├── australia-etc-Feb-27-2012.tar.bz2 │ │ └── australia-userlocalbin-Feb-27-2012.tar.bz2 │ ├── chile │ │ ├── chile-cron-Feb-27-2012.tar.bz2 │ │ ├── chile-etc-Feb-27-2012.tar.bz2 │ │ └── chile-userlocalbin-Feb-27-2012.tar.bz2 │ └── ireland │ ├── ireland-cron-Feb-27-2012.tar.bz2 │ ├── ireland-etc-Feb-27-2012.tar.bz2 │ ├── ireland-postgresql-Mar-27-2012.sql.bz2 │ └── ireland-userlocalbin-Feb-27-2012.tar.bz2 └── lost+found===Space Consideration and Allocation===For backing up the configurations and keeping copies of those for the previous 30 days and also allocating room for possible synced copies from other servers, minimum space requirements is 10GB. To accommodate for the synced copy of the repository that could go up to 2TB===Data Retention===* Removable drives will keep data up to 3 days* Network synced drives/servers will keep data up to 30 days ===Initial Setup===This applies to any new server that will be backed up (this process could become a script eventually)* Create a user named "backup"* Give that user certificate access through ssh (to and from) the other servers (in the backup group). Tutorials available [http://zenit.senecac.on.ca/wiki/index.php/OPS235_Lab_7 here]* Also give cert access to the root of each server so that those can remote access to itthe "backup" user of other servers. There is * Add a hubnew lvm called archive that will be mounted as /archive on startup (add an entry to /etc/fstab). LVM tutorial available [http://zenit.senecac.on.ca/wiki/index.php/OPS235_Lab_4 here]* Create the following directories and give "backup" write permission to those directories /archive/blaze-backup /archive/repo-backup /var/log/blaze-backup* Create the following file and give "backup" write permission to that file and also add the hostname for the admin server (iraq) in that file (please see offered services section for other options) /etc/sysconfig/blaze* In the admin host, add the hostname in the buddyhost section in blaze and wildfire with a web interfacerandom syncpeer. (optional, please see offered services section for more options) * Add the following entry to /etc/aliases (use proper email format): blaze-wildfire: fedora-arm at senecacollege dot ca* Schedule backup as root (crontab entry). It will look something similar to this: 20 2 * * * ADMHOST=$(cat /etc/sysconfig/blaze); BKU=backup; export ADMHOST BKU; scp $BKU@$ADMHOST:/usr/local/bin/blaze \ /usr/local/bin/; chown -R $BKU:$BKU /usr/local/bin/blaze; chmod 755 /usr/local/bin/blaze; /usr/local/bin/blaze* If the server is going to be a databasereposync host then follow the first three steps to create a user account called apache and give it access to and from the repohost ===Scheduling===* In Chile blaze runs at 01:35 AM UTC* In Hongkong blaze runs at 02:05 AM UTC* In Australia blaze runs at 02:20 AM UTC* In Ireland blaze runs at 03:35 AM UTC* In Scotland blaze runs at 12:50 AM EDT* In Romania blaze runs at 01:50 AM EDT* In Iraq blaze runs at 08:30 AM EDT ===Offered/Backedup Servers/Services===* Please add the service type in the appropriate row in the "Define the names of the remote machines and services" section in each script** PostgreSQL Database Server (DBHOST)(Possibly one - Ireland)** Repository (REPOHOST) (Possibly one - Chile)** Server that has backup to removable drive capabilities (RBDHOST) (Chile or Ireland or Scotland)** Central Sync Server (SYNCHOST) (Iraq, Scotland and Romania)** Repository Backup (COPYREPOHOST) (Scotland Romania)** Sync Peer (BUDDYHOST) (All)** Custom Log and Mail Server (AGGREGHOST) (Iraq)** Administrator Host (ADMHOST) (Iraq, for now)** All related servers under blaze wildfire system (ALLSYS) (Australia Chile Hongkong Iraq Ireland Scotland Romania) ===Repo Sync===* Repo sync process is done via rsync* Repo sync via LVM snapshot is under consideration===Backup to Removable Drives===* Removable drives (2x1T or 1x2T) can be attached to the repo server or any server that has a certificate server copy of the repo* Those servers have the capability to auto backup overnight as long as the drives are labeled as cdot-backup-nnn (where nnn could be 001..999) * Multiple removable drives should be used and one set of drives containing the full repo copy should be always offsite (daily rotation schedule)===Offsite Backup===* Offsite backup over the network is still under consideration===Restore from Backups===This process is not automated yet. If an older copy is required for the postgresql dump or any scripts or configuration files, please copy the necessary zip file from /archive/blaze-backup/[hostname]/ location and unzip it to a repositorynew location and copy the desired file. Please follow the [[#Backup_Layout|backup layout]] table provided in the Appendix. There PostgreSQL Restore is done via the following command (after unzipping): pg_restore == Conclusion==ARM is still a developing technology and expectations are morethat The Fedora ARM Project at Seneca CDOT will be highly active for the next few years. Depending on the level of activity the backup strategy in place may become out of date in a matter of months or it may need to be supplemented with other solutions.==Appendix=====Admin Configuration===This file specifies which server is the admin host. It is available in each host at /etc/sysconfig/blaze===Backup Layout==={|class="mediawiki" border="1" cellspacing="2" width="100%"|:'''Source Server'''|:'''Backup Source'''|:'''Type of Data'''|:'''LAN Targets'''|:'''Backup Location'''|-|:Hongkong|:/etc/:/var/spool/cron/:/usr/local/bin/:/var/lib/bcfg2/|:Configurations:Cronjobs:Scripts:BCFG2 DB|:Iraq and Scotland|:/archive/blaze-backup/hongkong/|-|:Ireland|:/etc/:/var/spool/cron/:pg_dump:/usr/local/bin/|:Configurations:Cronjobs:PostgreSQL DB:Scripts|:Iraq and Chile|:/archive/blaze-backup/ireland/|-|:Australia|:/etc/:/var/spool/cron/:/usr/local/bin/|:Configurations:Cronjobs:Scripts|:Iraq and Hongkong|:/archive/blaze-backup/australia/|-|:Chile|:/etc/:/var/spool/cron/:/mnt/koji/:/usr/local/bin/|:Configurations:Cronjobs:Repo:Scripts|:Iraq and Australia:(Repo Sync in Scotland and Romania only)|:/archive/blaze-backup/chile/:/archive/repo-backup/|-|:Iraq|:/etc/:/var/spool/cron/:/usr/local/bin/|:Configurations:Cronjobs:Scripts|:Chile|:/archive/blaze-backup/iraq/|-|:Scotland|:/etc/:/var/spool/cron/:/usr/local/bin/:/var/lib/etherpad-lite|:Configurations:Cronjobs:Scripts:Etherpad Lite DB|:Iraq and Ireland|:/archive/blaze-backup/scotland/|-|:Romania|:/etc/:/var/spool/cron/:/usr/local/bin/|:Configurations:Cronjobs:Scripts|:Australia, Iraq and Scotland|:/archive/blaze-backup/romania/|} ===Backup Location Capacity=== hongkong Filesystem Type Size Mounted on /dev/mapper/hk-archive ext4 5.0G /archive iraq Filesystem Type Size Mounted on /dev/mapper/iraq-archive ext4 50.0G /archive ireland Filesystem Type Size Mounted on /dev/mapper/ireland-archive ext4 1.2T /archive australia Filesystem Type Size Mounted on /dev/mapper/australia-archive ext4 9.9G /archive chile Filesystem Type Size Mounted on /dev/mapper/chile-archive ext4 9.9G /archive scotland Filesystem Type Size Mounted on /dev/mapper/scotland-archive ext4 2.2T /archive romania Filesystem Type Size Mounted on /dev/mapper/yoda-archive ext4 2.0T /archive ===Log Files===Available on all servers running blaze /var/log/blaze-backup.log /var/log/wildfire-sync.logAvailable on central/aggregator/admin server /var/log/blaze-wildfire.log .
