Cloud Migration Security Challenges
Cloud Migration Security Challenges might differ from company to company. Based on their expertise in the field of the underlying technology and the understanding of the best practice.
The Cloud Migration Security Challenges start even before the migration starts.
But, let’s discuss the challenges associated with the migration phase.
Cloud migration has multiple steps, they are famously called Cloud Migration Steps.
In brief, we can divide the steps into 3 main steps.
- Discovery phase
- Migration phase
- UAT phase
Cloud Migration Challenges in the Discovery phase:
Cloud Migration is a process of moving a server from on-premises to the cloud. In order to move that source into the cloud, it is essential to get the configuration information for the source.
How to handle Challenges during On-Premise to Cloud Migration Discovery phase?
Things to be followed to overcome the challenges during On-Premise to Cloud Migration Process. Identify the production server capacity based on their resource utilization. Identifies the underlying operating system.
This discovery happens through a remote administration method. Often organization disabled the remote administrations for their servers. So that needs to be enabled by allowing the Remote UAC for Windows-based server.
For Linux servers, the local firewall such as IPTables may restrict the access. If the SELinux is restrictive, sometimes the remote administration is a challenge.
Discovery phase supports the modelling of the target server at the target cloud based on the production server configuration.
Cloud Migration Challenges in Migration Phase:
This is the phase where data from the source production servers move to the target cloud on the target VM that was created based on the source discovery process.
Now the challenge happens when the data from the production demands to move to the target without losing its consistency and without any downtime.
Suppose a file is kept opened or the data are not committed into the harddisk and remains on the RAM, that data does not move to the target and that leaves the target inconsistent to the source production server.
In case of the bandwidth between the production server site and the target, the cloud is too low, it would be difficult to migrate the large servers over the low bandwidth lines.
The data migrations are not secure, then there are chances of data loss in between the transition. For Database migration to cloud, the biggest challenge is to have a consistent database at the target cloud.
The Database has the transaction logs which records database modifications. The Server will not return control to the application that committed a transaction until that transaction has been hardened to disk.
So if the transaction log is not committed into the hard disk, the transaction log won’t move into the target and so the database will not be consistent.
UAT phase:
User Acceptance Test – UAT is the most crucial for any of the migration. If the target server is not the same as the source servers, such as the drive letters are mismatched.
The application is not opening or functioning different than on the source production server. Few of the files are missing, unable to RDP or SSH to the target server. The migration is considered as void.
How to overcome the Cloud Migration Testing Challenge?
To overcome the Cloud Migration Testing Challenges or before going for a production server migration, it is always recommended to do a POC migration with a test server to observe the total time it takes and the difficulties occur during the cloud migration.
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