DTGOV Cloud Strategy: Ensuring Application Resilience and Recovery

This case study delves into DTGOV's strategic initiative to migrate its services to a hybrid cloud environment, aiming for cost-effectiveness and operational optimization. The analysis focuses on the critical aspects of application resilience, backup, and disaster recovery planning within the hybrid cloud. It recommends implementing security measures, such as unique employee credentials and firewalls, to protect data. The study also proposes leveraging Amazon Web Services (AWS) and its various components like Amazon CloudWatch, Elastic Load Balancing, and Amazon RDS to enhance application availability and reduce costs. Furthermore, it outlines specific techniques for disaster recovery, including data archiving using Amazon Glacier and regional failover using Amazon Route 53. The operational checklist of Morad and Dalbhanjan is used to assess the requirements for remote server administration, SLA management, and resource management, highlighting the importance of comparing Amazon EBS instances, dynamic addressing of AWS, and secure credential management. The study concludes that DTGOV's cloud migration strategy will enhance growth and productivity.

Running head: CLOUD COMPUTING
Cloud Computing
Name of the Student
Name of the University
Author Note

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Table of Contents
Introduction................................................................................................................................2
Response to question 1...............................................................................................................2
Application resilience.............................................................................................................2
Backup and Disaster Recovery..............................................................................................4
Response to Question 2:.............................................................................................................5
Operational checklist of Morad and Dalbhanjan...................................................................5
Conclusion..................................................................................................................................7
References..................................................................................................................................8

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Introduction
DTGOV plans to improve its business model and working. The chief motive of
DTGOV is to achieve operational optimization and cost effectiveness. The plan by the Board
of DTGOV includes retaining a single data centre out of the three they have. This will allow
them to move the services to cloud. Migration of Web Services to the cloud is proposed by
the Board to increase flexibility and HA (High Availability). The LoB or the Line of Business
application will be shifted to the public cloud.
Response to question 1.
The board plans to move the services to the hybrid cloud. The migration of the
services comes with advantages and necessary issues of application resilience with the need
of disaster and backup recovery in the Hybrid cloud environment. There are several risks in
implementing hybrid cloud services (Rittinghouse & Ransome, 2016). The company can
implement the AWS (Amazon Web Service) model in their business framework. There are
threats to this model mainly security issues and these are of growing concern for any
organization. The board is recommended to implement security measures for the security of
data. The security policies should prevent unauthorized access of data inside the cloud. The
policies should involve provision of unique employee credentials for accessing the cloud
(Rajesh & Kishan, 2017). Firewalls must be introduced to prevent unauthorized breaches of
cloud resources.
Application resilience
Inclusion of the recommendation is important for the smooth functioning of the
resources. Implementation of hybrid cloud is essential as it achieves the aims set by

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organization. The chief purpose of the benefits is the complete spanning of the resources
through isolated storage locally. These alternatives can be enabled by moving into the Hybrid
cloud. This is caused as the unprotected cloud is utilized intensively for the purpose of
backup. Each application retains a distinctive characteristics and requirements of HA or High
Availability. AWS or Amazon web service is highly cost effective and thus reduces
expenditure of the company by a high margin. AWS has an infrastructural building block
which aids the organization to reduce overall cost and increase revenue of the company. High
availability analysis will be done to confirm recovery of the applications when the need arises
and not any recovery of component that will be included in the effective HA strategy 9
Narula & Jain, 2015). The recommendations to be included in the business BCP of DTGOV
are:
 Amazon cloud watch
 Elastic load balancing – to balance the load among several zones of availability
 Amazon RDS (relational database) utilization
 Mutli-Az for available data base zones
 Scaling recovery
 Instinctive scaling
 Amazon EBS snapshots
 Flexible IP addresses – static and remapping be done in the occurrences
 Management variety can be easily handled by AWS elastic beanstalk (Wittig &
Wittig, 2015).
 Amazon SimpleDB utilization or Amazon Dynamo DB for pair loading of key
values.

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Backup and Disaster Recovery
The applications that the cloud host for an organization needs a distinct recovery
requirement disaster which needs to be connected with the purposes of requirements
connected to geographical placement of the cloud, recovery time and recovery points, which
check the physical vicinity of the disaster recovery sites. The most effective strategy for
disaster recovery involves the usage of DR kind that should be included for confirmation of
restoring of the expected application. Additionally effective and efficient DR strategy
consists of regional duplication, comprehensive traffic administration, mid region recovery,
load balancing, maintaining and overall administration of resources. Techniques to be
included in the business BCP of DTGOV for engaging efficient DR strategy are as under:
 Data can be archived by utilizing Amazon glacier
 Archiving data, instances execution, Amazon machine images in zones of several
AWS
 In cases of regional based failover Amazon Route 53 is put to use
 Amazon Machine image (AMI) exploitation and EBS in several zones
 Utilization of Amazon EC2 instances –aids in capacity reservation of DR in any
isolated situation
Backup recommendation
 RDBMS cloud : Microsoft SQL server 2008 R2
 Fault tolerance design in cloud
 Amazon S3 is utilized for stockpiling of data in cloud and for control of the
version

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Response to Question 2:
The requirements of DTGOV are discussed with the help of Morad and Dalbhanjan’s
operational checklist. The requirements are necessary to remotely control administration of
the server, SLA management and management of resources for the proposed instances.
Operational checklist of Morad and Dalbhanjan
Operational checklist of Morad and Dalbhanjan is as follows:
 Amazon EBS instances are compared based completely on the capability to support
storage. The result of the comparison is studied to come across the suitable storage
choice and determination of data, recovery and backup is analyzed.
 Dynamic addressing of AWS is done completely to comprehend the functionalities
and also to assure the capability of the application operation once the application
entities are made to start all over again (Amazon, 2015).
 The deployment of the application entities are done across numerous availability
locations. The successful data duplication performance across the location and
application testing is performed for the instances when application components
functionalities fail.
 Failure occurrences are identified and understood in situations where application
components are used for several available zones clubbed with elastic load balancing
usage or monitoring of the third party application with extra usage of IP address
elastic in nature perfectly suiting the circumstance.
 Accessing the OS or operating system’s user account, the efficient use of credential
which is highly suitable for being utilized. There is certainly no involvement of key
pairing utilisation of AWS’ private keys with every other system administrator.

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 CNAME record execution is done solely for DNS name mapping of Elastic Load
balancing or Amazon S3.
 Confidential and the sensitive information which consists of pairs of embedded keys
both private and public are removed. In place of that SSH keys are authorized and
reviewed.
 Production accounts to support the business are planned to incorporate the reports of
trusted advisors of AWS with reviews taken in account for the operation in action.
 Amazon RDS or known as distributed relation database of Amazon web service are
designed or developed to simplify the scalability of relational database, operation and
set up of RDS.
Features include:
 Amazon RDS brings in enhancement of security protocols of databases by the
integration of AWS configuration. The modifications are recorded and audited to
configure the instances of database. The instances included for recording and
auditing of the processes are snapshots, security groups, subnet group,
subscriptions and parameter group (Newcombe et al., 2015).
 The prominent attribute of the RDS is that it is highly cost effective and the
charges are done on an hourly basis which minimizes overall cost of the process
(Safvati, Sharzehei & Mesbahi, 2017).
 Data transfer is easy and swift.
 The users are notified about any developing situation via the Amazon SNS. The
API’s provides allowance to the users to utilize different databases in relation to
database instances of the user (Uotila, 2019).

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 Amazon CloudWatch is a metric system provided by Amazon RDS with
minimum to no cost (Villamizar et al., 2016). The console is used for the
visualization of metrics about the chief operations including I/O activity, storage
and computing, capacity utilization and lastly connection of instances (Nawaz et
al, 2016). Additional provision of Amazon RDS is enhanced monitoring. The
provision comes with additional features like accessibility disk input output
metrics, memory and file system. To detect issues regarding performance can be
done by the Performance insights.
Conclusion
The organization moving its services to the Hybrid cloud will enhance their growth
and productivity.

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References
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IEEE International Parallel and Distributed Processing Symposium Workshops
(IPDPSW) (pp. 535-544). IEEE.
Newcombe, C., Rath, T., Zhang, F., Munteanu, B., Brooker, M., & Deardeuff, M. (2015).
How Amazon web services uses formal methods. Communications of the ACM, 58(4),
66-73.
Rajesh, R., & Kishan, K. (2017). A Study on Cloud Computing Security: Amazon Web
Service. International Journal of Research, 4(17), 103-106.
Rittinghouse, J. W., & Ransome, J. F. (2016). Cloud computing: implementation,
management, and security. CRC press.
Safvati, M. A., Sharzehei, M., & Mesbahi, M. R. (2017, December). Investigating the
features of research environments on cloud computing. In 2017 IEEE 4th
International Conference on Knowledge-Based Engineering and Innovation
(KBEI) (pp. 0404-0411). IEEE.
Uotila, T. (2019). Designing scalable microservices: Case: AWS with Python.

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Villamizar, M., Garces, O., Ochoa, L., Castro, H., Salamanca, L., Verano, M., ... & Lang, M.
(2016, May). Infrastructure cost comparison of running web applications in the cloud
using AWS lambda and monolithic and microservice architectures. In 2016 16th
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(CCGrid) (pp. 179-182). IEEE.
Wittig, A., & Wittig, M. (2015). Amazon web services in action. Manning Publications Co..