From 476b4da4c052bf995841451d299a4c7b140c5ec1 Mon Sep 17 00:00:00 2001 From: Colin Johnson Date: Sat, 12 Apr 2014 21:21:28 +0000 Subject: [PATCH] merging in epoch date usage - allows script to be run more than once a day --- .../ec2-automate-backup-awscli.sh | 4 +- ec2-automate-backup/ec2-automate-backup.sh | 126 +++++++++--------- 2 files changed, 63 insertions(+), 67 deletions(-) diff --git a/ec2-automate-backup/ec2-automate-backup-awscli.sh b/ec2-automate-backup/ec2-automate-backup-awscli.sh index 0c917ec..731088f 100755 --- a/ec2-automate-backup/ec2-automate-backup-awscli.sh +++ b/ec2-automate-backup/ec2-automate-backup-awscli.sh @@ -1,8 +1,8 @@ #!/bin/bash - # Author: Colin Johnson / colin@cloudavail.com # Contributors: buckelij / https://github.com/buckelij -# Date: 2014-03-02 -# Version 0.1 +# Date: 2014-04-12 +# Version 0.9 # License Type: GNU GENERAL PUBLIC LICENSE, Version 3 # diff --git a/ec2-automate-backup/ec2-automate-backup.sh b/ec2-automate-backup/ec2-automate-backup.sh index c9b8e6e..349fe87 100755 --- a/ec2-automate-backup/ec2-automate-backup.sh +++ b/ec2-automate-backup/ec2-automate-backup.sh @@ -1,9 +1,18 @@ #!/bin/bash - -# Author: Colin Johnson / colin@cloudavail.com -# Date: 2013-02-13 -# Version 0.9 +# Date: 2014-04-12 +# Version 0.10 # License Type: GNU GENERAL PUBLIC LICENSE, Version 3 -# +# Author: +# Colin Johnson / https://github.com/colinbjohnson / colin@cloudavail.com +# Contributors: +# Alex Corley / https://github.com/anthroprose +# Jon Higgs / https://github.com/jonhiggs +# Mike / https://github.com/eyesis +# Jeff Vogt / https://github.com/jvogt +# Dave Stern / https://github.com/davestern +# Josef / https://github.com/J0s3f +# buckelij / https://github.com/buckelij + #confirms that executables required for succesful script execution are available prerequisite_check() { @@ -27,7 +36,7 @@ get_EBS_List() fi ebs_selection_string="$volumeid" ;; - tag) + tag) if [[ -z $tag ]] then echo "The selected selection_method \"tag\" (-s tag) requires a valid tag (-t key=value) for operation. Correct usage is as follows: \"-s tag -t backup=true\" or \"-s tag -t Name=my_tag.\"" 1>&2 ; exit 64 fi @@ -43,35 +52,34 @@ get_EBS_List() then echo -e "An error occured when running ec2-describe-volumes. The error returned is below:\n$ebs_backup_list_complete" 1>&2 ; exit 70 fi ebs_backup_list=`echo "$ebs_backup_list_complete" | grep ^VOLUME | cut -f 2` - #code to right will output list of EBS volumes to be backed up: echo -e "Now outputting ebs_backup_list:\n$ebs_backup_list" } create_EBS_Snapshot_Tags() { #snapshot tags holds all tags that need to be applied to a given snapshot - by aggregating tags we ensure that ec2-create-tags is called only onece snapshot_tags="" - #if $name_tag_create is true then append ec2ab_${ebs_selected}_$date_current to the variable $snapshot_tags + #if $name_tag_create is true then append ec2ab_${ebs_selected}_$current_date to the variable $snapshot_tags if $name_tag_create then # possible duplicate code ec2_snapshot_resource_id=`echo "$ec2_create_snapshot_result" | cut -f 2` ec2_snapshot_resource_id=`echo "$ec2_create_snapshot_result" | cut -f 2` - snapshot_tags="$snapshot_tags --tag Name=ec2ab_${ebs_selected}_$date_current" + snapshot_tags="$snapshot_tags --tag Name=ec2ab_${ebs_selected}_$current_date" fi #if $hostname_tag_create is true then append --tag InitiatingHost=`hostname -f` to the variable $snapshot_tags if $hostname_tag_create then snapshot_tags="$snapshot_tags --tag InitiatingHost='`hostname -f`'" fi - #if $purge_after_days is true, then append $purge_after_date to the variable $snapshot_tags - if [[ -n $purge_after_days ]] + #if $purge_after_date_fe is true, then append $purge_after_date_fe to the variable $snapshot_tags + if [[ -n $purge_after_date_fe ]] then - snapshot_tags="$snapshot_tags --tag PurgeAfter=$purge_after_date --tag PurgeAllow=true" + snapshot_tags="$snapshot_tags --tag PurgeAfterFE=$purge_after_date_fe --tag PurgeAllow=true" fi #if $user_tags is true, then append Volume=$ebs_selected and Created=$current_date to the variable $snapshot_tags if $user_tags then - snapshot_tags="$snapshot_tags --tag Volume=${ebs_selected} --tag Created=$date_current" + snapshot_tags="$snapshot_tags --tag Volume=${ebs_selected} --tag Created=$current_date" fi #if $snapshot_tags is not zero length then set the tag on the snapshot using ec2-create-tags @@ -81,7 +89,7 @@ create_EBS_Snapshot_Tags() fi } -date_binary_get() +get_date_binary() { #`uname -o (operating system) would be ideal, but OS X / Darwin does not support to -o option` #`uname` on OS X defaults to `uname -s` and `uname` on GNU/Linux defaults to `uname -s` @@ -93,59 +101,46 @@ date_binary_get() esac } -get_purge_after_date() +get_purge_after_date_fe() { +case $purge_after_input in + #any number of numbers followed by a letter "d" or "days" multiplied by 86400 (number of seconds in a day) + [0-9]*d) purge_after_value_seconds=$(( ${purge_after_input%?} * 86400 )) ;; + #any number of numbers followed by a letter "h" or "hours" multiplied by 3600 (number of seconds in an hour) + [0-9]*h) purge_after_value_seconds=$(( ${purge_after_input%?} * 3600 )) ;; + #any number of numbers followed by a letter "m" or "minutes" multiplied by 60 (number of seconds in a minute) + [0-9]*m) purge_after_value_seconds=$(( ${purge_after_input%?} * 60 ));; + #no trailing digits default is days - multiply by 86400 (number of minutes in a day) + *) purge_after_value_seconds=$(( $purge_after_input * 86400 ));; +esac #based on the date_binary variable, the case statement below will determine the method to use to determine "purge_after_days" in the future case $date_binary in - linux-gnu) echo `date -d +${purge_after_days}days -u +%Y-%m-%d` ;; - osx-posix) echo `date -v+${purge_after_days}d -u +%Y-%m-%d` ;; - *) echo `date -d +${purge_after_days}days -u +%Y-%m-%d` ;; -esac -} - -get_purge_after_date_epoch() -{ -#based on the date_binary variable, the case statement below will determine the method to use to determine "purge_after_date_epoch" in the future -case $date_binary in - linux-gnu) echo `date -d $purge_after_date +%s` ;; - osx-posix) echo `date -j -f "%Y-%m-%d" $purge_after_date "+%s"` ;; - *) echo `date -d $purge_after_date +%s` ;; -esac -} - -get_date_current_epoch() -{ -#based on the date_binary variable, the case statement below will determine the method to use to determine "date_current_epoch" in the future -case $date_binary in - linux-gnu) echo `date -d $date_current +%s` ;; - osx-posix) echo `date -j -f "%Y-%m-%d" $date_current "+%s"` ;; - *) echo `date -d $date_current +%s` ;; + linux-gnu) echo `date -d +${purge_after_value_seconds}sec -u +%s` ;; + osx-posix) echo `date -v +${purge_after_value_seconds}S -u +%s` ;; + *) echo `date -d +${purge_after_value_seconds}sec -u +%s` ;; esac } purge_EBS_Snapshots() { - #snapshot_tag_list is a string that contains all snapshots with either the key PurgeAllow or PurgeAfter set - snapshot_tag_list=`ec2-describe-tags --show-empty-fields --region $region --filter resource-type=snapshot --filter key=PurgeAllow,PurgeAfter` + #snapshot_tag_list is a string that contains all snapshots with either the key PurgeAllow or PurgeAfterFE set + snapshot_tag_list=`ec2-describe-tags --show-empty-fields --region $region --filter resource-type=snapshot --filter key=PurgeAllow,PurgeAfterFE` #snapshot_purge_allowed is a list of all snapshot_ids with PurgeAllow=true snapshot_purge_allowed=`echo "$snapshot_tag_list" | grep .*PurgeAllow'\s'true | cut -f 3` - + for snapshot_id_evaluated in $snapshot_purge_allowed do - #gets the "PurgeAfter" date which is in UTC with YYYY-MM-DD format (or %Y-%m-%d) - purge_after_date=`echo "$snapshot_tag_list" | grep .*$snapshot_id_evaluated'\s'PurgeAfter.* | cut -f 5` + #gets the "PurgeAfterFE" date which is in UTC with UNIX Time format (or xxxxxxxxxx / %s) + purge_after_date_fe_tag=`echo "$snapshot_tag_list" | grep .*$snapshot_id_evaluated'\s'PurgeAfterFE.* | cut -f 5` #if purge_after_date is not set then we have a problem. Need to alert user. - if [[ -z $purge_after_date ]] - #Alerts user to the fact that a Snapshot was found with PurgeAllow=true but with no PurgeAfter date. - then echo "A Snapshot with the Snapshot ID $snapshot_id_evaluated has the tag \"PurgeAllow=true\" but does not have a \"PurgeAfter=YYYY-MM-DD\" date. $app_name is unable to determine if $snapshot_id_evaluated should be purged." 1>&2 + if [[ -z $purge_after_date_fe_tag ]] + #Alerts user to the fact that a Snapshot was found with PurgeAllow=true but with no PurgeAfterFE date. + then echo "A Snapshot with the Snapshot ID $snapshot_id_evaluated has the tag \"PurgeAllow=true\" but does not have a \"PurgeAfterFE=xxxxxxxxxx\" date where PurgeAfterFE is UNIX time. $app_name is unable to determine if $snapshot_id_evaluated should be purged." 1>&2 else - #convert both the date_current and purge_after_date into epoch time to allow for comparison - date_current_epoch=`get_date_current_epoch` - purge_after_date_epoch=`get_purge_after_date_epoch` - #perform compparison - if $purge_after_date_epoch is a lower number than $date_current_epoch than the PurgeAfter date is earlier than the current date - and the snapshot can be safely removed - if [[ $purge_after_date_epoch < $date_current_epoch ]] + #perform comparison - if $purge_after_date_epoch is a lower number than $current_date_epoch than the PurgeAfterFE date is earlier than the current date - and the snapshot can be safely removed + if [[ $purge_after_date_fe_tag < $current_date ]] then - echo "The snapshot \"$snapshot_id_evaluated\" with the Purge After date of $purge_after_date will be deleted." + echo "The snapshot \"$snapshot_id_evaluated\" with the PurgeAfterFE date of $purge_after_date_fe_tag will be deleted." ec2-delete-snapshot --region $region $snapshot_id_evaluated fi fi @@ -161,9 +156,9 @@ date_binary="" name_tag_create=false #sets the "InitiatingHost" tag set for a snapshot to false hostname_tag_create=false -#sets the user_tags feature to false - user_tag creates tags on snapshots - by default each snapshot is tagged with volume_id and current_data timestamp +#sets the user_tags feature to false - user_tag creates tags on snapshots - by default each snapshot is tagged with volume_id and current_date timestamp user_tags=false -#sets the Purge Snapshot feature to false - this feature will eventually allow the removal of snapshots that have a "PurgeAfter" tag that is earlier than current date +#sets the Purge Snapshot feature to false - this feature will eventually allow the removal of snapshots that have a "PurgeAfterFE" tag that is earlier than current date purge_snapshots=false #handles options processing @@ -175,7 +170,7 @@ while getopts :s:c:r:v:t:k:pnhu opt r) region="$OPTARG";; v) volumeid="$OPTARG";; t) tag="$OPTARG";; - k) purge_after_days="$OPTARG";; + k) purge_after_input="$OPTARG";; n) name_tag_create=true;; h) hostname_tag_create=true;; p) purge_snapshots=true;; @@ -186,7 +181,7 @@ while getopts :s:c:r:v:t:k:pnhu opt #sources "cron_primer" file for running under cron or other restricted environments - this file should contain the variables and environment configuration required for ec2-automate-backup to run correctly if [[ -n $cron_primer ]] - then if [[ -f $cron_primer ]] + then if [[ -f $cron_primer ]] then source $cron_primer else echo "Cron Primer File \"$cron_primer\" Could Not Be Found." 1>&2 ; exit 70 @@ -197,7 +192,7 @@ fi if [[ -z $region ]] #if the environment variable $EC2_REGION is not set set to us-east-1 then if [[ -z $EC2_REGION ]] - #if both + #if both then region="us-east-1" else region=$EC2_REGION @@ -208,16 +203,17 @@ fi prerequisite_check #sets date variable -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 ]] +current_date=`date -u +%s` + +#sets the PurgeAfterFE tag to the number of seconds that a snapshot should be retained +if [[ -n $purge_after_input ]] then - #if the date_binary is not set, call the date_binary_get function + #if the date_binary is not set, call the get_date_binary function if [[ -z $date_binary ]] - then date_binary_get + then get_date_binary fi - purge_after_date=`get_purge_after_date` - echo "Snapshots taken by $app_name will be eligible for purging after the following date: $purge_after_date." + purge_after_date_fe=`get_purge_after_date_fe` + echo "Snapshots taken by $app_name will be eligible for purging after the following date (the purge after date given in seconds from epoch): $purge_after_date_fe." fi #get_EBS_List gets a list of EBS instances for which a snapshot is desired. The list of EBS instances depends upon the selection_method that is provided by user input @@ -226,13 +222,13 @@ get_EBS_List #the loop below is called once for each volume in $ebs_backup_list - the currently selected EBS volume is passed in as "ebs_selected" for ebs_selected in $ebs_backup_list do - ec2_snapshot_description="ec2ab_${ebs_selected}_$date_current" + ec2_snapshot_description="ec2ab_${ebs_selected}_$current_date" ec2_create_snapshot_result=`ec2-create-snapshot --region $region -d $ec2_snapshot_description $ebs_selected 2>&1` if [[ $? != 0 ]] then echo -e "An error occured when running ec2-create-snapshot. The error returned is below:\n$ec2_create_snapshot_result" 1>&2 ; exit 70 else ec2_snapshot_resource_id=`echo "$ec2_create_snapshot_result" | cut -f 2` - fi + fi create_EBS_Snapshot_Tags done