# Introduction:
ec2-automate-backup was created to provide easy backup/snapshot functionality for EC2 EBS volumes. Common uses would include the following:
* run ec2-automate-backup with a list of volumes for which a snapshot is desired (example: ec2-automate-backup.sh -v "vol-6d6a0527 vol-636a0112")
* run ec2-automate-backup with a list of volumes for which a snapshot is desired and allow the created snapshots to be deleted after 14 days (example: ec2-automate-backup.sh -v "vol-6d6a0527 vol-636a0112" -k 31)
* run ec2-automate-backup using cron to produce a daily backup (example: "0 0 * * 0 ec2-user /home/ec2-user/ec2-automate-backup.sh -v "vol-6d6a0527 vol-636a0112" > /home/ec2-user/ec2-automate-backup_`date +"%Y%m%d"`.log")
* run ec2-automate-backup to snapshot all EBS volumes that contain the tag "Backup=true" (example: "0 0 * * 0 ec2-user /home/ec2-user/ec2-automate-backup.sh -s tag -t "Backup=true" > /home/ec2-user/ec2-automate-backup_`date +"%Y%m%d"`.log")
# Directions For Use:
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## Example of Use:
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ec2-automate-backup -v vol-6d6a0527
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the above example would provide a single backup of the EBS volumeid vol-6d6a0527. The snapshot would be created with the description "vol-6d6a0527_2012-09-07".
## Required Parameters:
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ec2-automate-backup requires one of the following two parameters be provided:
-v <volumeid> - the "volumeid" parameter is required to select EBS volumes for snapshot if ec2-automate-backup is run using the "volumeid" selection method - the "volumeid" selection method is the default selection method.
-t <tag> - the "tag" parameter is required if the "method" of selecting EBS volumes for snapshot is by tag (-s tag). The format for tag is key=value (example: Backup=true) and the correct method for running ec2-automate-backup in this manner is ec2-automate-backup -s tag -t Backup=true.
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## Optional Parameters:
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-r <region> - the region that contains the EBS volumes for which you wish to have a snapshot created.
-s <selection_method> - the selection method by which EBS volumes will be selected. Currently supported selection methods are "volumeid" and "tag." The selection method "volumeid" identifies EBS volumes for which a snapshot should be taken by volume id whereas the selection method "tag" identifies EBS volumes for which a snapshot should be taken by a key=value format tag.
-n - tag snapshots "Name" tag as well as description
-k <purge_after_days> - the period after which a snapshot can be purged. For example, running "ec2-automate-backup.sh -v "vol-6d6a0527 vol-636a0112" -k 31" would allow snapshots to be removed after 31 days. purge_after_days creates two tags for each volume that was backed up - a PurgeAllow tag which is set to PurgeAllow=true and a PurgeAfter tag which is set to the present day (in UTC) + the value provided by -k.
-p - the -p flag will purge (meaning delete) all snapshots that were created more than "purge after days" ago. ec2-automate-backup looks at two tags to determine which snapshots should be deleted - the PurgeAllow and PurgeAfter tags. The tags must be set as follows: PurgeAllow=true and PurgeAfter=YYYY-MM-DD where YYYY-MM-DD must be before the present date.
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# Potential Uses and Methods of Use:
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* To backup multiple EBS volumes use ec2-automate-backup as follows: ec2-automate-backup -v "vol-6d6a0527 vol-636a0112"
* To backup a selected group of EBS volumes on a daily schedule tag each volume you wish to backup with the tag "Backup=true" and run ec2-automate-backup using cron as follows: 0 0 * * 0 ec2-automate-backup -s tag -t "Backup=true"
* To backup a selected group of EBS volumes on a daily and/or monthly schedule tag each volume you wish to backup with the tag "Backup-Daily=true" and/or "Backup-Monthly=true" and run ec2-automate-backup using cron as follows:
- 0 0 * * 0 ec2-user /home/ec2-user/ec2-automate-backup.sh -s tag -t "Backup-Daily=true"
- 0 0 1 * * ec2-user /home/ec2-user/ec2-automate-backup.sh -s tag -t "Backup-Monthly=true"
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# Additional Information:
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Author: Colin Johnson / colin@cloudavail.com
Date: 2012-09-21
Version 0.1
License Type: GNU GENERAL PUBLIC LICENSE, Version 3
