ec2-consistent-snapshot on GitHub and v0.43 Released


The source for ec2-conssitent-snapshot has historically been available here:

ec2-consistent-snapshot on using Bazaar

For your convenience, it is now also available here:

ec2-consistent-snapshot on GitHub using Git

You are welcome to fork ec2-consistent snapshot under the liberal terms of the Apache License, Version 2.0.

I welcome patch submissions, especially if:

  1. The patch accomplishes a single enhancement or bug fix, changing as little as possible to accomplish the goals, while still performing appropriate error checks.

  2. The patch includes relevant updates to the documentation.

  3. The patch does not add functionality outside of the narrow goal of ec2-consistent-snapshot (initiate EBS snapshots with consistent filesystems and application data).

  4. The patch is created against the latest version of the source.

I also recommend submitting a bug/feature in to track adding the patch to ec2-consistent-snapshot:

Not all patches will be accepted, but you are encouraged to maintain forks on GitHub so that others can include your patches if they find them useful.

New Release

Two user-contributed patches have been incorporated (with minor adjustments) into ec2-consistent-snapshot with the latest release of version 0.43:

  1. Ability to freeze multiple file systems by specifying —freeze-filesystem multiple times (thanks to Bobb Crosbie).

  2. Ability to specify commands to run just before freezing the file system(s) and just after thawing the file systems (thanks to Craig Tracey).

The new release of ec2-consistent-snapshot is available in the Alestic PPA for easy installation and upgrading in Ubuntu. You can install it on Ubuntu using:

sudo add-apt-repository ppa:alestic &&
sudo apt-get update &&
sudo apt-get install -y ec2-consistent-snapshot

ec2-consistent-snapshot is usable on other Linux distros as long as you install dependencies like xfsprogs, perl, libnet-amazon-ec2-perl, libfile-slurp-perl, libwww-perl, libdigest-hmac-perl, libparams-validate-perl, libxml-simple-perl, libmoose-perl, libcrypt-ssleay-perl.


Really excited about the "Ability to specify commands to run just before freezing the file system", I didn't realise this had been added. I presume this makes it possible to run a script that'd support consistent snapshots of other database types like MongoDB. I know there was a fork of ec2-consistent-snapshot that supported MongoDB but the script route seems more maintainable.

I know you mentioned your desire to keep this script tight but do you have any interest in making the database functionality pluggable so we could swap out mysql to support a different DB and still provide command line parameters that relate to that DB?

Is there a means to get libnet-amazon-ec2-perl installed in Hardy 8.04? apt-get returns that E: Package libnet-amazon-ec2-perl has no installation candidate.


Scroll down to the "INSTALLATION" section of the manpage here:

There are special instructions for Ubuntu 8.04 Hardy.

Note, however, that ec2-consistent-snapshot is no longer being upgraded for Hardy in the Alestic PPA.


The pre/post commands were added by Craig Tracey.

I'd be happy to review patches for pluggable database support or for specific databases.

I had this working when I was using it inside standard EC2, when I moved to VPC the snapshots stopped. I have the instance is inside a public subnet with an EIP assigned to it, what more should I be doing so that the snapshots work from within VPC ?


There is insufficient information in your question for me to diagnose the issue. I'd recommend asking your question on, providing more details on what you are running and what the error messages are.

Leave a comment

Ubuntu AMIs

Ubuntu AMIs for EC2:

More Entries

When Are Your SSL Certificates Expiring on AWS?
If you uploaded SSL certificates to Amazon Web Services for ELB (Elastic Load Balancing) or CloudFront (CDN), then you will want to keep an eye on the expiration dates and…
Throw Away The Password To Your AWS Account
reduce the risk of losing control of your AWS account by not knowing the root account password As Amazon states, one of the best practices for using AWS is Don’t…
AWS Community Heroes Program
Amazon Web Services recently announced an AWS Community Heroes Program where they are starting to recognize publicly some of the many individuals around the world who contribute in so many…
EBS-SSD Boot AMIs For Ubuntu On Amazon EC2
With Amazon’s announcement that SSD is now available for EBS volumes, they have also declared this the recommended EBS volume type. The good folks at Canonical are now building Ubuntu…
EC2 create-image Does Not Fully "Stop" The Instance
The EC2 create-image API/command/console action is a convenient trigger to create an AMI from a running (or stopped) EBS boot instance. It takes a snapshot of the instance’s EBS volume(s)…
Finding the Region for an AWS Resource ID
use concurrent AWS command line requests to search the world for your instance, image, volume, snapshot, … Background Amazon EC2 and many other AWS services are divided up into various…
Changing The Default "ubuntu" Username On New EC2 Instances
configure your own ssh username in user-data The official Ubuntu AMIs create a default user with the username ubuntu which is used for the initial ssh access, i.e.: ssh ubuntu@<HOST>…
Default ssh Usernames For Connecting To EC2 Instances
Each AMI publisher on EC2 decides what user (or users) should have ssh access enabled by default and what ssh credentials should allow you to gain access as that user.…
New c3.* Instance Types on Amazon EC2 - Nice!
Worth switching. Amazon shared that the new c3.* instance types have been in high demand on EC2 since they were released. I finally had a minute to take a look…
Query EC2 Account Limits with AWS API
Here’s a useful tip mentioned in one of the sessions at AWS re:Invent this year. There is a little known API call that lets you query some of the EC2…
Using aws-cli --query Option To Simplify Output
My favorite session at AWS re:Invent was James Saryerwinnie’s clear, concise, and informative tour of the aws-cli (command line interface), which according to GitHub logs he is enhancing like crazy.…
Reset S3 Object Timestamp for Bucket Lifecycle Expiration
use aws-cli to extend expiration and restart the delete or archive countdown on objects in an S3 bucket Background S3 buckets allow you to specify lifecycle rules that tell AWS…
Installing aws-cli, the New AWS Command Line Tool
consistent control over more AWS services with aws-cli, a single, powerful command line tool from Amazon Readers of this tech blog know that I am a fan of the power…
Using An AWS CloudFormation Stack To Allow "-" Instead Of "+" In Gmail Email Addresses
Launch a CloudFormation template to set up a stack of AWS resources to fill a simple need: Supporting Gmail addresses with “-” instead of “+” separating the user name from…
New Options In ec2-expire-snapshots v0.11
The ec2-expire-snapshots program can be used to expire EBS snapshots in Amazon EC2 on a regular schedule that you define. It can be used as a companion to ec2-consistent-snapshot or…
Replacing a CloudFront Distribution to "Invalidate" All Objects
I was chatting with Kevin Boyd (aka Beryllium) on the ##aws Freenode IRC channel about the challenge of invalidating a large number of CloudFront objects (35,000) due to a problem…
Email Alerts for AWS Billing Alarms
using CloudWatch and SNS to send yourself email messages when AWS costs accrue past limits you define The Amazon documentation describes how to use the AWS console to monitor your…
Cost of Transitioning S3 Objects to Glacier
how I was surprised by a large AWS charge and how to calculate the break-even point Glacier Archival of S3 Objects Amazon recently introduced a fantastic new feature where S3…
Running Ubuntu on Amazon EC2 in Sydney, Australia
Amazon has announced a new AWS region in Sydney, Australia with the name ap-southeast-2. The official Ubuntu AMI lookup pages (1, 2) don’t seem to be showing the new location…
Save Money by Giving Away Unused Heavy Utilization Reserved Instances
You may be able to save on future EC2 expenses by selling an unused Reserved Instance for less than its true value or even $0.01, provided it is in the…
Installing AWS Command Line Tools from Amazon Downloads
This article describes how to install the old generation of AWS command line tools. For the most part, these have been replaced with the new AWS cli that is…
Convert Running EC2 Instance to EBS-Optimized Instance with Provisioned IOPS EBS Volumes
Amazon just announced two related features for getting super-fast, consistent performance with EBS volumes: (1) Provisioned IOPS EBS volumes, and (2) EBS-Optimized Instances. Starting new instances and EBS volumes with…
Which EC2 Availability Zone is Affected by an Outage?
Did you know that Amazon includes status messages about the health of availability zones in the output of the ec2-describe-availability-zones command, the associated API call, and the AWS console? Right…
Installing AWS Command Line Tools Using Ubuntu Packages
See also: Installing AWS Command Line Tools from Amazon Downloads Here are the steps for installing the AWS command line tools that are currently available as Ubuntu packages. These include:…
Ubuntu Developer Summit, May 2012 (Oakland)
I will be attending the Ubuntu Developer Summit (UDS) next week in Oakland, CA. ┬áThis event brings people from around the world together in one place every six months to…
Uploading Known ssh Host Key in EC2 user-data Script
The ssh protocol uses two different keys to keep you secure: The user ssh key is the one we normally think of. This authenticates us to the remote host, proving…
Seeding Torrents with Amazon S3 and s3cmd on Ubuntu
Amazon Web Services is such a huge, complex service with so many products and features that sometimes very simple but powerful features fall through the cracks when you’re reading the…
There are a number of CloudCamp events coming up in cities around the world. These are free events, organized around the various concepts, technologies, and services that fall under the…
Use the Same Architecture (64-bit) on All EC2 Instance Types
A few hours ago, Amazon AWS announced that all EC2 instance types can now run 64-bit AMIs. Though t1.micro, m1.small, and c1.medium will continue to also support 32-bit AMIs, it…
ec2-consistent-snapshot on GitHub and v0.43 Released
The source for ec2-conssitent-snapshot has historically been available here: ec2-consistent-snapshot on using Bazaar For your convenience, it is now also available here: ec2-consistent-snapshot on GitHub using Git You are…