AWS S3 Lifecycle Policies: Simple Storage Service Management

Understanding the complicated policies of ASW S3 makes you a superior candidate and an all-around better person.

One of the most popular products from Amazon Web Service (AWS), is Simple Storage Service, popularly abbreviated as S3 . This service provides a durable, highly-available and inexpensive object storage for any kind of object — of any size. Behind S3’s durability and high-availability (HA), there are great engineering practices along with, redundancy and implementation of versioning that makes it very appealing as a web-scale storage service.
Everyone knows about Amazon S3, so discussing here wouldn’t serve us well. Rather, we are going to discuss how objects are stored, and how life-cyles of objects are maintained. I won’t dive into ASW S3 Lifecycle security in this post either. Security represents a crucial part of the developer’s responsibility is an important topic, so I suggest you read Stuart Scott’s post from this winter S3 Lifecycle Policies, Versioning & Encryption: AWS Security.

Storing and maintaining lifecycle objects in AWS S3

We have buckets in S3 and we store objects in them.

  • How are these objects managed?
  • How are the DR & HA achieved?
  • How do objects underneath the storage layer behave when a PUT or DELETE operation is performed?

Let’s talk about S3 Objects and their lifecycle policies.
Amazon S3 achieves high availability by replicating data across multiple servers within Amazon’s data centers. If a PUT request is successful, your data is safely stored. However, information about the changes must replicate across Amazon S3. Also, S3 keeps multiple versions of the Object to achieve HA. Enabling or disabling versioning of one object within the bucket is optional. If you enable versioning, you can protect your objects from accidental deletion or being overwritten because you have the option of retrieving older versions of them.
Object versioning can be used in combination with Object Lifecycle Management, which allows you the option of customizing your data retention requirements while controlling your storage costs.
When you PUT an object in a versioning-enabled bucket, the noncurrent version is not overwritten. Rather, when a new version of a file or an object is PUT into a bucket that already contains an object with the same name, the original object remains in the bucket, and Amazon S3 generates a new version ID. Amazon S3 then adds the newer version to the bucket. This service is automatically performed by S3 so that, as a user, your only concern is enabling and disabling the versioning in the bucket.
Amazon S3 also provides resources for managing lifecycle by user need. For example, if you want to move less frequently accessed data to Glacier, or set a rule to delete the file (e.g. old log files of an application stored in a bucket) after a specified interval of time, you can easily automate the process. AWS allows the enabling of up-to 100 lifecycle rules for achieving control of your objects in S3 buckets.

Configuring Amazon S3 Lifecycle:

Amazon S3 Lifecycle configurations are provided by means of XML. A typical configuration looks like this:

<LifecycleConfiguration>
  <Rule>
    <ID> cloudacademy-image-rule</ID>
    <Prefix>cloudacademyblogimg/</Prefix>
    <Status>Enabled</Status>
    <Transition>
      <Days>90</Days>
      <StorageClass>GLACIER</StorageClass>
    </Transition>
    <Expiration>
      <Days>365</Days>
    </Expiration>
  </Rule>
</LifecycleConfiguration>

Here we have defined an S3 lifecycle configuration for objects in a bucket. We have images in a bucket stored in the folder named cloudacademyblogimg and we want to move them to GLACIER storage every 30 days. Glacier is another useful service from Amazon allowing inexpensive, highly durable storage services for archiving huge volumes of data. After a year of storage, we will likely delete it.  Let’s look at the various metadata associated with it:

  • LifecycleConfiguration – A LifecycleConfiguration defines a rule that applies to an object with a key.
  • ID– The ID element uniquely identifies a rule. A lifecycle configuration can have up to 1000 rules.
  • Prefix – Prefix are the Object keys. If in an S3 bucket named cloudacademyblog we have a folder called cloudacademyblogimg, and an image is named S3_thumbnail.gif inside that folder, then the Object key is cloudacademyblogimg/S3_thumbnail.gif. If you do not specify the Prefix, the rule will be applied to all the objects in the bucket.
  • Status – Enabled or Disabled.
  • Transition – Transition is one of the lifecycle actions of S3. This transition action specifies you want to move the objects from one storage class to another. There are three storage classes in S3 named, STANDARD, STANDARD-IA (IA denotes Infrequent Access) and GLACIER.  Here we have mentioned GLACIER, where files will be moved after 90 days. You can either specify the number of days or a specific date (but you cannot use both).
  • Expiration – The Expiration action specifies when the objects expire. In this case, we have specified a period of 365 days, or one year. There are several considerations for the expiration rules. These rules might seem a bit confusing at first, so please be patient and read along. They will eventually make sense and you can refer back to them frequently. A good understanding of this concept will take you a long way while working with S3.
    • In a non-versioned bucket, the Expiration action results in Amazon S3 permanently removing the object.
    • The expiration action applies only to the current version. In a versioned bucket, S3 will not take any action if there are one or more object versions and the delete marker is the current version.
    • If the current object version is the only object version and it is also a delete marker, S3 will remove the expired object delete marker.
    • If current object version is not a delete marker, Amazon S3 adds a delete marker with a unique version ID, making the current version noncurrent, and the delete marker the current version.
    • For non-current version objects, there is an action named NoncurrentVersionTransition action element, which is used to specify how long (from the time the objects became noncurrent) users want the objects to remain in the current storage class before Amazon S3 transitions them to the specified storage class.
    • There is also a NoncurrentVersionExpiration action for non-current version objects that specify how long (from the time the objects became noncurrent) user want to retain noncurrent object versions before Amazon S3 permanently removes them. In this case, the deleted object cannot be recovered.
    • Starting from March 16th, 2016, Amazon S3 introduced “incomplete multipart upload expiration policy”.
      • If a multi-part upload is incomplete, the partial upload does not appear when users list their objects by default. However, this does incur storage charges.
      • Previously, you needed to manually cancel the multi-part upload to remove partial uploads.
      • Now, users can set a lifecycle policy to automatically expire and remove incomplete multi-part uploads after a predefined number of days.
      • The policy applies to everything in a bucket, including existing partial uploads. The rule looks like this:
<LifecycleConfiguration>
<Rule>
<ID>multipart-upload-rule</ID>
<Prefix></Prefix>
<Status>Enabled</Status>
<AbortIncompleteMultipartUpload>
<DaysAfterInitiation>3</DaysAfterInitiation>
</AbortIncompleteMultipartUpload>
</Rule>
</LifecycleConfiguration>
  • Always remember that the “last modified date” of an object is treated as the starting date for the lifecycle of that object in S3. If you replace the object, the new date is considered the creation date.
  • If an object is marked as non-current, due to it being overwritten or deleted, S3 will take action on that object(s) since it transitioned to non-current.
  • You can specify multiple rules for different lifecycle action on objects. Take a look at this rule:
    • One rule acts on where the images in cloudacademyblogimg are moved to GLACIER after 30 days and removed after 365 days.
    • The other rule specifies that the logs-in will be transitioned to Standard Infrequent access storage class (STANDARD_IA), after 7 days and deleted after 30 days.
<LifecycleConfiguration>
    <Rule>
        <ID>CAImgRule</ID>
        <Prefix>cloudacademyblogimg/</Prefix>
        <Status>Enabled</Status>
        <Transition>
           <Days>90</Days>
           <StorageClass>GLACIER</StorageClass>
        </Transition>
        <Expiration>
             <Days>365</Days>
        </Expiration>
    </Rule>
    <Rule>
        <ID> CALogRule</ID>
        <Prefix> cloudacademylogs/</Prefix>
        <Status>Enabled</Status>
        <Transition>
           <Days>30</Days>
           <StorageClass>STANDARD_IA</StorageClass>
        </Transition>
        <Expiration>
             <Days>30</Days>
        </Expiration>
    </Rule>
</LifecycleConfiguration>
  • The lifecycle rule is applied through AWS CLI as follows:
aws s3api put-bucket-lifecycle  --bucket bucketname --lifecycle-configuration filename-containing-lifecycle-configuration

Applying Lifecycle rules in AWS Management Console:

  • Login to the S3 in AWS Management Console.
  • Navigate to the bucket that you want to apply Lifecycle rules.
1
  • Click on the Lifecycle link on the right-hand side of the Properties tab, and click on “Add rule”.
Add Rule
(Add Rule)
  • You can either apply the rule to the whole bucket or any folder (prefix). We selected cpimg/ to apply Lifecycle rules in this example. Click on “Configure Rule”.
3
(Lifecycle Rule Naming)
  • We have provided 30 days for Transition and 365 days for Expiration to the objects. We also specified 2 days for incomplete multipart uploads.
4
(Applying Lifecycle Expiration & Transition )
  • Then Review, Create & Activate Rule.
5
  • If the rule does not contain any errors, it is displayed in the Lifecycle pane.
6

Conclusion:

Mastering ASW S3 policies and exceptions requires considerable energy. Cloud Academy can help. They offer a suite of products for developers learning ASW S3.
Screen Shot 2016-05-02 at 3.40.35 PM
There are video courses, hands-on learning paths, and quizzes. Each component supports a professional approach to practical learning.
Video courses are created and narrated by working professional ASW developers who understand time constraints and deliver the information learners need for passing exams and, more importantly, excelling in a critical IT role.
Screen Shot 2016-05-02 at 3.41.03 PM
People learn differently. Some students love quizzes because they help push information into a higher-level of mental storage. Others use quizzes for testing themselves and determining areas of strength and weakness for a personal approach. Cloud Academy Quizzes offer duel modes for maximum learning flexibility:
Screen Shot 2016-05-02 at 3.40.21 PM
Most technical people agree project-based learning resonates most powerfully with them. Cloud Academy offers hands-on labs in an actual AWS environment. Students may experiment in a live ASW world without leaving the Cloud Academy site or signing up for services with AWS. This builds confidence and reinforces knowledge.
Screen Shot 2016-05-02 at 3.41.26 PM
When you review this post, you’ll see we used the AWS Management Console to create and activate a rule. In a professional setting, a developer will likely require far more complex rules.  This is more an opportunity than a challenge because there are tremendously good learning resources around AWS S3. Treat yourself to a free 7-day trial subscription to Cloud Academy where the above resources are all available. Training, personal determination, and AWS S3 documentation present a winning combination for career advancement.

Avatar

Written by

Chandan Patra

Cloud Computing and Big Data professional with 10 years of experience in pre-sales, architecture, design, build and troubleshooting with best engineering practices. Specialities: Cloud Computing - AWS, DevOps(Chef), Hadoop Ecosystem, Storm & Kafka, ELK Stack, NoSQL, Java, Spring, Hibernate, Web Service


Related Posts

Avatar
Stuart Scott
— October 16, 2019

AWS Security: Bastion Host, NAT instances and VPC Peering

Effective security requires close control over your data and resources. Bastion hosts, NAT instances, and VPC peering can help you secure your AWS infrastructure. Welcome to part four of my AWS Security overview. In part three, we looked at network security at the subnet level. This ti...

Read more
  • AWS
Avatar
Sudhi Seshachala
— October 9, 2019

Top 13 Amazon Virtual Private Cloud (VPC) Best Practices

Amazon Virtual Private Cloud (VPC) brings a host of advantages to the table, including static private IP addresses, Elastic Network Interfaces, secure bastion host setup, DHCP options, Advanced Network Access Control, predictable internal IP ranges, VPN connectivity, movement of interna...

Read more
  • AWS
  • best practices
  • VPC
Avatar
Stuart Scott
— October 2, 2019

Big Changes to the AWS Certification Exams

With AWS re:Invent 2019 just around the corner, we can expect some early announcements to trickle through with upcoming features and services. However, AWS has just announced some big changes to their certification exams. So what’s changing and what’s new? There is a brand NEW ...

Read more
  • AWS
  • Certifications
Alisha Reyes
Alisha Reyes
— October 1, 2019

New on Cloud Academy: ITIL® 4, Microsoft 365 Tenant, Jenkins, TOGAF® 9.1, and more

At Cloud Academy, we're always striving to make improvements to our training platform. Based on your feedback, we released some new features to help make it easier for you to continue studying. These new features allow you to: Remove content from “Continue Studying” section Disc...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
  • ITIL® 4
  • Jenkins
  • Microsoft 365 Tenant
  • New content
  • Product Feature
  • Python programming
  • TOGAF® 9.1
Avatar
Stuart Scott
— September 27, 2019

AWS Security Groups: Instance Level Security

Instance security requires that you fully understand AWS security groups, along with patching responsibility, key pairs, and various tenancy options. As a precursor to this post, you should have a thorough understanding of the AWS Shared Responsibility Model before moving onto discussi...

Read more
  • AWS
  • instance security
  • Security
  • security groups
Avatar
Jeremy Cook
— September 17, 2019

Cloud Migration Risks & Benefits

If you’re like most businesses, you already have at least one workload running in the cloud. However, that doesn’t mean that cloud migration is right for everyone. While cloud environments are generally scalable, reliable, and highly available, those won’t be the only considerations dri...

Read more
  • AWS
  • Azure
  • Cloud Migration
Joe Nemer
Joe Nemer
— September 12, 2019

Real-Time Application Monitoring with Amazon Kinesis

Amazon Kinesis is a real-time data streaming service that makes it easy to collect, process, and analyze data so you can get quick insights and react as fast as possible to new information.  With Amazon Kinesis you can ingest real-time data such as application logs, website clickstre...

Read more
  • amazon kinesis
  • AWS
  • Stream Analytics
  • Streaming data
Joe Nemer
Joe Nemer
— September 6, 2019

Google Cloud Functions vs. AWS Lambda: The Fight for Serverless Cloud Domination

Serverless computing: What is it and why is it important? A quick background The general concept of serverless computing was introduced to the market by Amazon Web Services (AWS) around 2014 with the release of AWS Lambda. As we know, cloud computing has made it possible for users to ...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
Joe Nemer
Joe Nemer
— September 3, 2019

Google Vision vs. Amazon Rekognition: A Vendor-Neutral Comparison

Google Cloud Vision and Amazon Rekognition offer a broad spectrum of solutions, some of which are comparable in terms of functional details, quality, performance, and costs. This post is a fact-based comparative analysis on Google Vision vs. Amazon Rekognition and will focus on the tech...

Read more
  • Amazon Rekognition
  • AWS
  • Google Cloud Platform
  • Google Vision
Alisha Reyes
Alisha Reyes
— August 30, 2019

New on Cloud Academy: CISSP, AWS, Azure, & DevOps Labs, Python for Beginners, and more…

As Hurricane Dorian intensifies, it looks like Floridians across the entire state might have to hunker down for another big one. If you've gone through a hurricane, you know that preparing for one is no joke. You'll need a survival kit with plenty of water, flashlights, batteries, and n...

Read more
  • AWS
  • Azure
  • Google Cloud Platform
  • New content
  • Product Feature
  • Python programming
Joe Nemer
Joe Nemer
— August 27, 2019

Amazon Route 53: Why You Should Consider DNS Migration

What Amazon Route 53 brings to the DNS table Amazon Route 53 is a highly available and scalable Domain Name System (DNS) service offered by AWS. It is named by the TCP or UDP port 53, which is where DNS server requests are addressed. Like any DNS service, Route 53 handles domain regist...

Read more
  • Amazon
  • AWS
  • Cloud Migration
  • DNS
  • Route 53
Alisha Reyes
Alisha Reyes
— August 22, 2019

How to Unlock Complimentary Access to Cloud Academy

Are you looking to get trained or certified on AWS, Azure, Google Cloud Platform, DevOps, Cloud Security, Python, Java, or another technical skill? Then you'll want to mark your calendars for August 23, 2019. Starting Friday at 12:00 a.m. PDT (3:00 a.m. EDT), Cloud Academy is offering c...

Read more
  • AWS
  • Azure
  • cloud academy content
  • complimentary access
  • GCP
  • on the house