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increase portability - now runs on OS X and Linux - resolve issue with differences in date binary.

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This commit is contained in:
Colin Johnson 2012-10-06 22:27:59 +00:00
parent eee4ad0637
commit ca1e84fec5
1 changed files with 31 additions and 3 deletions
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34
ec2-automate-backup/ec2-automate-backup.sh
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@ -63,10 +63,31 @@ create_EBS_Snapshot_Tags()
fi
#if $snapshot_tags is not zero length then set the tag on the snapshot using ec2-create-tags
if [[ -n $snapshot_tags ]]
then ec2-create-tags $ec2_snapshot_resource_id --region $region $snapshot_tags
then echo "Tagging Snapshot $ec2_snapshot_resource_id with the following Tags:"
ec2-create-tags $ec2_snapshot_resource_id --region $region $snapshot_tags
fi
}
date_command_get()
{
#finds full path to date binary
date_binary_full_path=`which date`
#command below is used to determine if date binary is gnu, macosx or other
date_binary_file_result=`file -b $date_binary_full_path`
case $date_binary_file_result in
"Mach-O 64-bit executable x86_64") date_binary="macosx" ;;
"ELF 64-bit LSB executable, x86-64, version 1 (SYSV)"*) date_binary="gnu" ;;
*) date_binary="unknown" ;;
esac
#based on the installed date binary the case statement below will determine the method to use to determine "purge_after_days" in the future
case $date_binary in
gnu) date_command="date -d +${purge_after_days}days -u +%Y-%m-%d" ;;
macosx) date_command="date -v+${purge_after_days}d -u +%Y-%m-%d" ;;
unknown) date_command="date -d +${purge_after_days}days -u +%Y-%m-%d" ;;
*) date_command="date -d +${purge_after_days}days -u +%Y-%m-%d" ;;
esac
}
purge_EBS_Snapshots()
{
#snapshot_tag_list is a string that contains all snapshots with either the key PurgeAllow or PurgeAfter set
@ -104,11 +125,13 @@ app_name=`basename $0`
#sets defaults
selection_method="volumeid"
region="us-east-1"
#date_binary allows a user to set the "date" binary that is installed on their system and, therefore, the options that will be given to the date binary to perform date calculations
date_binary=""
#sets the "Name" tag set for a snapshot to false - using "Name" requires that ec2-create-tags be called in addition to ec2-create-snapshot
name_tag_create=false
#sets the Purge Snapshot feature to false - this feature will eventually allow the removal of snapshots that have a "PurgeAfter" tag that is earlier than current date
purge_snapshots=false
#handles options processing
while getopts :s:r:v:t:k:pn opt
do
@ -128,7 +151,12 @@ while getopts :s:r:v:t:k:pn opt
date_current=`date -u +%Y-%m-%d`
#sets the PurgeAfter tag to the number of days that a snapshot should be retained
if [[ -n $purge_after_days ]]
then purge_after_date=`date -v+${purge_after_days}d -u +%Y-%m-%d`
then
#if the date_binary is not set, call the date_command_get function
if [[ -z $date_binary ]]
then date_command_get
fi
purge_after_date=`$date_command`
echo "Snapshots taken by $app_name will be eligible for purging after the following date: $purge_after_date."
fi