Posts Tagged ‘ aws ’
Hi,
If you are using alestic Ubuntu AMIs for AWS/EC2 the timezone is UTC by default, I had to change that to GMT for a customer here is a way to do it automatically in your build script or without human intervention:
echo “Etc/GMT” | tee /etc/timezone
dpkg-reconfigure –frontend noninteractive tzdata
Note: The –frontend option has two – in front
You can check more timezones at the directory /usr/share/zoneinfo/
Hope it helps you!
Cheers!
Hi folks,
Today I had to come up with a solution for a customer using AWS/EC2 to make their crontab resilient to server re-builds in case it goes down by autoscaler or other situations. That’s why I created a script that is called daily that backups the crontab of a specific user to a file in an EBS mounted volume maintaining a 7 days library just in case 
:
#!/bin/bash
find /data -maxdepth 1 -name ‘bkp-crontab-*’ -mtime 7 -exec rm {} \;
crontab -l -u YOUR_USER_GOES_HERE > /data/bkp-crontab-`date +%Y-%m-%d`
Then to recover the last backup of crontab for the user you can put this in your server script when you are building it:
cat `ls -tr /data/bkp-crontab-* | tail -1` | crontab -u YOUR_USER_GOES_HERE -
This will load the last backup file in the users crontab.
I hope this helps you to have your crontabs backed up 
Cheers!
Hi!
Long time since my last post! I want to say happy new year to everyone who visits my blog and I hope all your wishes come true in this year. I have been very busy with my start-up company the lasts months (I even had to work in my 3 days annual vacation ) so that’s why I didn’t upload any new article. So today I will show you a little script that will upload your Virtualmin backups to S3. I have a customer that have backups larger than 5Gb and I can’t upload them directly to S3 since the limit per file in S3 is 5 Gbs so I used the split command to have 1Gb pieces of the backup and then upload all to S3. To use this script you have to configure your Virtualmin to backup to a local folder (In this case /bkps) and then have a daily script that can be placed in /etc/cron.daily for example with the following content:
#!/bin/bash
# Clean backup folder for old files
echo “Cleaning old backups…”
/usr/bin/find /bkps -type f -mtime +5 -print
/usr/bin/find /bkps -type f -mtime +5 -exec rm -f {} \;for bkpfile in `ls -1 /bkps/*.bkp`
do
echo “Generating MD5SUM for the original backup file $bkpfile…”
md5sum $bkpfile >> $bkpfile-md5sums
echo “Splitting backup file $bkpfile…”
split -a 1 -d -b 1073741824 –verbose $bkpfile $bkpfile-part
for splitbkpfile in `ls -1 $bkpfile-part*`
do
echo “Generating MD5SUM for split backup file $splitbkpfile…”
md5sum $splitbkpfile >> $bkpfile-md5sums
done
rm $bkpfile
done# Upload backups to S3
su -l -s /bin/bash -c “s3cmd –delete-removed -v sync /bkps s3://YOURBUCKET”
As you can see above, my backups are created with the extension .bkp also I have used the s3cmd to have access to S3. The installation of s3cmd is very easy and it haves packages for almost all the Linux distributions.
I hope you enjoy this script and later I will share with you some of my experiences with AWS cloud services for a large project I worked the lasts months including Load Balancing, Auto Scaler, etc. I have created some nice scripts (I think) to make my life with the AWS, so stay tuned! (I promise that you will not have to wait 2 months to have news from me )
Thank you very much for your time.
Cheers!
