The scope of possibilities has been expanded further with AWS announcement of its strategic partnership with VMware. On a closing note AWS or any cloud providers provide the best services possible and when it comes to storage and compute they are getting better and better over time. Amazon S3 Provides a highly durable storage infrastructure designed for mission-critical and primary data storage. Which Engagement Model Should You Choose When Considering a Software Vendor? Disaster Recovery is one of the most important aspects while architecting a solution in the software applications. 4. Its a bit like a grocery list you keep adding to it as new items come to mind, Identify the Importance of Each Infrastructure Element, Prioritize elements according to its importance in the organization. Key steps for Backup and Restore: 1. To protect your data and ensure business continuity, you need to create a disaster recovery plan. We can configure load balancing and auto-scaling so that when the traffic goes high the service will scale up automatically. In warm standby, the recovery time is reduced to almost zero by always running a scaled down version of a fully functional environment. Install and configure any non-AMI based systems, ideally in an automated way. Combination and variation of the below is always possible. AWS enables high flexibility, as we dont need to perform a failover of the entire site in case only one part of our application isnt working properly. RPO and RTO. To avoid getting your entire system knocked offline, you should distribute the data across different availability zones (AZ) around the world. Here the DNS service supports weighted routing. SLA is an agreement between providers in the AWS and the client (user). Amazon EC2 Provides resizable compute capacity in the cloud. Financially, we will only need to invest a small amount in advance (CAPEX), and we wont have to worry about the physical expenses for resources (for example, hardware delivery) that we would have in on an on-premise data center. Example: If the backup is made every 1 Hour and services went now which is after 50 mins then the time to recover data from the previous hour back up until now is RTO. Here you can achieve zero RTO and RPO but the cost would be high. The Backup and Restore plan is suitable for lower level business-critical applications. Backup & Restore (Data backed up and restored), Pilot Light (Only Minimal critical functionalities), Warm Standby (Fully Functional Scaled down version), For the DR scenarios options, RTO and RPO reduces with an increase in Cost as you move from Backup & Restore option (left) to Multi-Site option (right), AWS Import/Export can be used to transfer large data sets by shipping storage devices directly to AWS bypassing the Internet, Amazon Glacier can be used for archiving data, where retrieval time of several hours are adequate and acceptable, AWS Storage Gateway enables snapshots (used to created EBS volumes) of the on-premises data volumes to be transparently copied into S3 for backup. These solutions may be offered by third-party vendors for example, AWS partners with companies such as N2WS and Cloudberrylab that offer disaster recovery solutions tailored to AWS. Resize existing database/data store instances to process the increased traffic, Add additional database/data store instances to give the DR site resilience in the data tier. AWS Disaster Recovery whitepaper highlights AWS services and features that can be leveraged for disaster recovery (DR) processes to significantly minimize the impact on data, system, and overall business operations. A disaster can be caused by a security attack, a natural disaster or human error. Any event that has a negative impact on a companys business continuity or finances could be termed a disaster.. The Warm Standby scenario is more expensive than Backup and Restore and Pilot Light because in this case, our infrastructure is up and running on AWS. There are many options and scenarios for Disaster Recovery planning on AWS. Setting a multi-factor authentication solution can ensure the administrator and programmatic privileges dont fall in malicious hands. If we have a large amount of data that needs to be stored on Amazon S3, ideally we would use AWS Export/Import or even AWS Snowball to store our data on S3 as soon as possible. Before we begin AWS Disaster Recovery, let us discuss where majority of organizations are standing in terms of disaster recovery. The following figure shows data backup options to Amazon S3, from either on-site infrastructure or from AWS. A traditional on-premise Disaster Recovery plan often includes a fully duplicated infrastructure that is physically separate from the infrastructure that contains our production. What resources compose the core of your business? If a disaster occurs on the existing system, the whole traffic is routed to the new AWS environment. Critical applications can have frequent backups that can improve the RTO and minimize the overall downtime significantly. Availability = 100% Multiple of dependent Redundant Services Availability, Example: if two EC2 instances ( SLA 99.99% ) of the same applications are deployed in different availability zones then the availability is 100% (0.001% * 0.001%) = 99.999999%. Otherwise, you may receive errors as well. For example, you can implement detective measures such as server and network monitoring software. For small firms, it might not be a big deal to lose its data. There are four main recovery methods you can choose according to your organization requirements and preferences: #4. Business Continuity ensures that an organizations critical business functions continue to operate or recover quickly despite serious incidents. And you can literally select an additional region for backup half a world away. This definition changes based on the criticality of the business. Since the data is distributed in different regions, minimizes the risk of data loss. Regularly run these servers, test them, and apply any software updates and configuration changes. S3s duplicates the data to multiple locations within a region by default, creating high durability. The AWS Import/Export service bypasses the internet and transfers your data directly onto and off of storage devices using Amazons high-speed internal network. Recover Point Objective (RPO) is the maximum targeted period in which data might be lost from an IT service due to a major incident. In the aftermath of a threat, this forms part of lessons learned, refining the plan to prevent further attacks or failures. Creating a password-protected key looks something like this: Notes: You may take advantage of GUI of RHEL to send Private Key as an email, then open the mail and copy the private key from email, Open the Notepad in Windows 10 and save private key as ansiblekey.pem file, Then open PuTTY Key Generator and load the private key ansiblekey.pem, Then save it as a private key as ansible.ppk file, We now open Putty and input IP address we saved previously as Host Name (or IP address) 192.168.0.18, We then move on to Session and input IP address, For convenience, we may save it as a predefined session as shown below, You should see the pop up below if you log in for the very first time. Objects are optimized for infrequent access, for which retrieval times of several hours are adequate. The disaster could be due to computer viruses, vulnerabilities in applications and disk drives, corruption of data, or human error. One of the AWS best practice is to always design your systems for failures. By using the weighted route policy on Amazon Route 53 DNS, part of the traffic is redirected to the AWS infrastructure, while the other part is redirected to the on-premise infrastructure. You see below image after log in. If an application has redundant services calculating the availability differs by calculating dependent services instead redundant services have to be subtracted from 100% before multiplying across the services downtime percentage. Thanks to this partnership, users can expand their on-premise infrastructure (virtualized using VMware tools) to AWS, and create a DR plan via resources provided by AWS using VMware tools that they are already accustomed to using. Amazon EBS Provides the ability to create point-in-time snapshots of data volumes. How to quickly automate AWS Federated Session generation with Leapp CLI, Setting up a public containerized service in AWS in 3045 minutes. While planning and preparing a DR plan, well need to think about the AWS services we can use. For this walkthrough, you need the following: Based on AWS best practice, root user is not recommended to perform everyday tasks, even the administrative ones. Backup phase:In most traditional environments, data is backed up to tape and sent off-site regularly taking longer time to restore the system in the event of a disruption or disaster, Amazon S3 can be used to backup the data and perform a quick restore and is also available from any location, Data backed up then can be used to quickly restore and create Compute and Database instances. Ideally, it ensures that users will experience zero, or at worst, minimal issues while using your application. The Main concepts of Disaster Recovery revolve around Recovery Point Objective and Recovery Time Objective, will talk more about them below. In a Pilot Light Disaster Recovery scenario option a minimal version of an environment is always running in the cloud, which basically host the critical functionalities of the application for e.g. How Do I Use Azure API in Object Detection? In most cases, were talking about web and app servers running on a minimum-sized fleet. One of the leading cloud vendors, Amazon Web Services (AWS), provides its users with features to help them build their own Disaster Recovery Solution. The database is always activated for data replication and for the other layers, server images are created and updated periodically. It can be used either as a backup solution (Gateway-stored volumes) or as a primary data store (Gateway-cached volumes), AWS Direct connect can be used to transfer data directly from On-Premise to Amazon consistently and at high speed. Example: Let us consider two services Service A and Service B which are dependent have the availabilities of 99.99% and 99.99% respectively. If we use a compression and de-duplication tool, we can further decrease our expenses here. Code Direct is medium publication, focus on ideas, concepts and experiences about the tools used. The following figure shows the recovery phase of the pilot light scenario. With the introduction of AWS, all of the service has SLA (Service Level Agreement). While it may be tempting to implement all steps of a disaster recovery plan in-house, smaller companies lacking a dedicated IT team find it easier to use a third-party solution. In this article, I aim to cover what is a Disaster Recovery Plan (DRP) for AWS and Ill offer 10 tips to leverage the functions in your AWS console to prevent and recover from a disaster. Here, you can launch AWS resources in a virtual network that you define. Define and implement security and corrective measures. A solid disaster recovery plan help organizations stay up in the event of failure or attack. In a disaster event, all traffic will be redirected to the AWS infrastructure. You need to have quick access to the data in the event of a disaster. There are several ways to begin leveraging AWS functions to develop a DR plan: Developing and implementing a disaster recovery plan for AWS requires a certain degree of ingenuity, since AWS does not offer its own DR solution. It includes how much data loss is acceptable and the maximum allowed time to recover all of the lost data etc. Notes: In order to be able to connect to RHEL 8.3 from Windows 10 using putty later, we must enable what it is shown below. These include natural disasters such as an earthquake or fire, as well as those caused by human error such as unauthorized access to data, or malicious attacks. If the availability of a service is not known then it can be computed by the Mean time between failures (MTBF) and the Mean time to recover (MTR). This scenario is also the most expensive option, and it presents the last step toward full migration to an AWS infrastructure. Moreover, you need to calculate how much data loss your organization can absorb before incurring too much damage that is the recovery point objective. If a disaster occurs, we need to recover the data very quickly and reliably. However, the platform enables users to build a customized DR solution by repurposing some of the platforms features and tools. The application on AWS might access data sources on the on-site production system. Ensure an appropriate retention policy for this data. Also, it starts within 480 minutes and delete after 35 days, We set up our notification upon BACKUP_JOB_COMPLETED and RESTORE_JOB_COMPLETED, Now we will be testing our recovery plan using on-demand backup, Create an on-demand backup to simulate an EC2 backup and restore process, Select EC2 as Resource type and Instance ID created previously i-09f31cc79bb63e142 and leave IAM role as Default since it will automatically create a corresponding IAM role, Upon setting up on-demand backup, backup job was initiated. Scaling is fast and easy. Data is replicated or mirrored to the AWS infrastructure. if the RTO is 1 hour and disaster occurs @ 12:00 p.m (noon), then the DR process should restore the systems to an acceptable service level within an hour i.e. In case of disaster, EC2 cant be recovered automatically. Upon completion recovery, Lambda Function will automatically trigger to terminate newly created EC2 instance to save costs, In this part one of the AWS Disaster Recovery series, we focus on Backup and Restore of EC2 instance. You can use the Amazon cloud environment for disaster recovery. The traffic will go to the standby infrastructure as well as the existing infrastructure. You can create templates for your environments and deploy associated collections of resources (called a stack) as needed. Link your AWS ECS deployment to AWS CodePipeline with automated testing, Implementation of an E-Commerce System on AWS in an automated way using Terraform and Ansible, AWS ECS Instances File Descriptors Monitoring. AWS & SQLServer enthusiast from Bosnia | AWS Consultant | AWS Certified Solutions Architect & SysOps | @AWSBosnia Founder | MCSA & MCSE for SQL Server. Select an appropriate tool or method to back up the data into AWS. Ensure appropriate security measures are in place for this data, including encryption and access policies. For example, if losing 4 hours of data will cause too much damage, then you need to account for a RPO of much less than 4 hours. A Disaster Recovery Plan (DRP) is a structured and detailed set of instructions geared to recover system and networks in the event of failure or attack, with the aim to help the organization back to operational as fast as possible. Now its time for us to connect to RHEL 8.3 from Windows 10 using VirtualBox. You will want to make use of AWS disaster recovery management tools, many of which can be had with a few clicks of your cloud provider console. Disaster Recovery Scenarios still apply if Primary site is running in AWS using AWS multi region feature. 10 minutes after, the restore job was done, Email received for restore job completion, While backing up we created a brand new EC2. Most importantly, AWS allows a pay as you use (OPEX) model, so we dont have to spend a lot in advance. 2. Also, AWS services allow us to fully automate our disaster recovery plan. In Pilot Light, the RTO and RPO are low and it just takes a few minutes for recovery. Choose a disaster recovery planning method. In an IT industry, we have heard a lot of stories regarding data loss and hardware failure. Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service. AWS Disaster Recovery is no doubt among the list, How Disaster Recovery is not one solution fits all. Lets take a closer look at some of the important terminology associated with disaster recovery: Business Continuity. Which specific backup options are best suited to your circumstances? It reduces the recovery time further because in warm standby part of the service is always running. As the retrieval time is more in Amazon Glacier, it is used to store old backup files. If were talking about on-premise centers, a disaster recovery plan is expensive to maintain and implement. = MTBF / (MTBF + MTR). During recovery, a full-scale production environment, For Networking, either a ELB to distribute traffic to multiple instances and have DNS point to the load balancer or preallocated Elastic IP address with instances associated can be used, Set up Amazon EC2 instances or RDS instances to replicate or mirror data critical data. Obviously it will take time to recover data from tapes in the event of a disaster. For financial services data loss is unacceptable and based on the service the time to recover all the data till the point of disaster can vary. According to Gartner estimates the average cost of IT downtime is $5,600 per minute. AWS | AZURE | DEVOPS | MIGRATION | KUBERNETES | DOCKER | JENKINS | CI/CD | TERRAFORM | ANSIBLE | LINUX | NETWORKING. Well touching upon some generic strategies before jumping into our backup, Identify and Describe All of Your Infrastructure, Its essential to have a clear picture about your own infrastructure prior to coming up with a disaster recovery plan, It would not be possible to have a comprehensive disaster recovery plan without consulting the entire development team. In addition, storage, backup, archival and retrieval tools, and processes (OPEX) are also expensive. Amazon VPC allows you to provision a private, isolated section of the AWS cloud. There are several disaster scenarios that can impact your infrastructure. AWS Storage Gateway enables snapshots of your on-premise data volumes to be transparently copied into Amazon S3 for backup. How to Calculate Transfer Function of a Control Systems Engineering Model, The Psychology Behind Rubber Duck Debugging, hx welcomes Insurdata as a Renew Connect partner. By using auto-scaling, the capacity of services rapidly increases to handle the full production load. First, we will download Oracle Virtual Box on Windows 10, please click Windows hosts, Click Oracle VirtualBox and open the application and follow instructions here, you will install RHEL 8.3 as shown below. With Amazon S3, restoring a process is pretty fast compared to Amazon Glacier. The availability for a combination of services in a solution can be calculated by multiplying their availabilities. There are several strategies that we can use for disaster recovery of our on-premise data center using AWS infrastructure: The Backup and Restore scenario is an entry level form of disaster recovery on AWS. Ensure that all supporting custom software packages available in AWS. As we plan a DR plan, we need to identify crucial points of our on-premise infrastructure and then duplicate it inside the AWS. For example, you can use cross-region replication for S3. Define your recovery time objective (RTO) and your recovery point objective (RPO). A disaster recovery plan will ensure that our application stays online no matter the circumstances. A Region is a physical location in the world that has multiple Availability Zones. Availability Approx. Petabytz Technologies Inc. is a leading IT consulting,Data Science and Engineering, business solution and systems integration firm with a unique blend of services. Now we will get the ip that we will be using to connect to RHEL 8.3 from Windows 10 using Putty (highlighted ip address for enp0s3 is the right one to use). Shenanigans in getting a Java swing GUI app to run on Android. These AZs allow you to operate production applications and databases that are more highly available, fault tolerant, and scalable than would be possible from a single data center. When it comes to availability 99.99%, it translates to 52 Minutes downtime over a year, which is quite impressive when compared to maintaining on our own. No business is invulnerable to IT disasters, but a speedy recovery from a well-crafted IT disaster recovery plan is expected by todays ever-demanding customers. Based on the business continuity plan and availability of the cloud services the DR plan can make a solution better by avoiding any data loss. Example: After the service disruption the data can be recovered from 12 hours ago since the data is backed up every 12 hours, which implies the recovery point in time for this service is 12 hours. These are the security requirements for an on-premise data center disaster recovery infrastructure: Obviously, this kind of disaster recovery plan requires large investments in building disaster recovery sites or data centers (CAPEX). The Multi-Site scenario is a solution for an infrastructure that is up and running completely on AWS as well as on an on-premise data center. RTO is the duration to recover data from the latest backup until the time of disruption. Depending on the sizes, nature, requirements and other factors of a business. Recovery Point Objective (RPO): is the maximum time, in which your data might be lost from an application due to the disaster. This technique is simple and cost-effective, however, RPO will be huge and there will be downtime before restoration. Regularly test the recovery of this data and the restoration of the system. Snapshots of Amazon EBS volumes, Amazon RDS databases, and Amazon Redshift data warehouses can be stored in Amazon S3. As such, its adequate for protecting resources. The following diagram shows how to quickly restore a system from Amazon S3 backups to Amazon EC2. #2. Amazon S3 is the destination for data backup. For long term data storage, we use Amazon Glacier, which has the same durability as Amazon S3, but the difference is that the cost is lower compared to S3. Once a disaster occurs, infrastructure located on AWS takes over the traffic and performs its scaling and converting to a fully functional production environment with minimal RPO and RTO. Amazon EC2 VM Import Connector enables you to import virtual machine images from your existing environment to Amazon EC2 instances.
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