RHEL

How to Migrate to Azure from VMware

By on Monday, April 12, 2021
Azure_Migrate_Server_Migration_Replication
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How to Migrate to Azure from VMware

From last 5+ years Cloud Technology came into limelight. As all know Amazon Web Services popularly known as AWS still leading the race of Cloud Technology  but two other major player Google and Microsoft is continuously on growth and keep increasing their market share in cloud technology industry.

Microsoft due to their global reach due to their many other desktop and server environment operating systems like Windows taking many steps to retain their existing client into Cloud Technology areas as well. Microsoft with their cloud services offerings in brand name azure grasping their feet with good speed and have many enterprise clients in their bad. Azure is leading especially in enterprise sector.

All enterprise clients are in the process of migrating their physical and virtual environment to decommission their datacenters to save some cost.

Are you also planning to migrate your virtual machine from VMware to Azure. We will share tried and tested procedure which might be helpful in your journey from VMware to Azure.

How to Migrate from VMware to Azure

All work needs proper planning before execution so as migration to Azure from VMware. You can categorize them in three major steps.

  • Pre-steps before Migration to Azure from VMware 

  • Migration to Azure from VMware

  • Post Step after Migration to Azure from VMware

  • Pre-steps before Migration to Azure from VMware 

  • Let us see what all things we need to make sure our migration success rate is high and have seamless experience.

  • Step 1

  • Make sure /boot partition must must have more than 60-70 MB plus. If it is not there you can remove some old kernel images and ensure it must have 60-70 MB available space in /boot file system which contains kernel related images. 

  • Step 2

  • Download the lis-rpms Packages from Microsoft . You can use below URL to download lix-rpms package from Microsoft.
  • DOWNLOAD LIS-RPMS PACKAGE

  • Step 3

  • Extract the download tar ball .
  • # tar xvzf lis-rpms-4.3.4.x86_64.tar.gz

  • Step 4

  • Install lis-rmps package
  • When you extract it in step 3 it gets extracted in present working directory under LISISO directory. Change to the LISISO directory like below and run install script. 
    # cd LISISO
  • #./install.sh

  • Step 5

  • Reboot the VMware Virtual Machine using below.
  • # shutdown -r now

  • Step 6

  • Configure VMware Virtual Machine to be ready to Migrate to Azure

  • I) In Azure /dev/sdb is used for /mnt/resources. So if you have any /dev/sdb mount point please comment those. Once VM is migrated then you can change mount point and mount those file system. Or even you can change it to next letter to avoid any issues during migration.

  • II) edit /etc/sysconfig/network file and add below two lines in file.

  • NETWORKING=yes
    HOSTNAME=<server-name>.localdomain

  • III) Replaced all contents of ifcfg-eth0 to make it compatible with DHCP.

    DEVICE=eth0
    ONBOOT=yes
    BOOTPROTO=dhcp
    TYPE=Ethernet
    USERCTL=no
    PEERDNS=yes
    IPV6INIT=no

  •  IV) Create Link like below
  • #ln -s /dev/null /etc/udev/rules.d/75-persistent-net-generator.rulesV) Remove Rules 

#rm -f /etc/udev/rules.d/70-persistent-net.rules

    VI) Update grub.conf for bootable image and remove  “rhgb quiet” and add “console=ttyS0 earlyprintk=ttyS0 rootdelay=300″ to the kernel parameters line in /etc/grub.conf. This is to make sure you can access console without issues.

  • VII) Make Network Server active across reboots. 
  • # chkconfig network on

    IX) Add ClientAliveInterval 180 to /etc/ssh/sshd_config file

  • X) Start the Virtual Machine Replication in Azure. Get help if needed to replicate onprem VM to Azure for Migration.

That`s it now your virtual machine is ready to migrate to azure from VMware.

Migration to Azure from VMware

As we have already managed for to get virtual machine replicated using mechanism in your environment.

Microsoft Azure Tool for Migrating VMware VM to Azure via Azure Migrate. Azure Migrate  is the service offered by Azure for the purpose of migration to Azure.

Step1

Login to Microsoft Azure Portal

Step2

Search and Open Azure Migrate and then select  Windows, Linux and SQL Server from left panel. In next screen please validate you have right project name is selected. You will get below screen which shows how many servers have been already replicated in Azure.

Azure_Migrate_Server_Migration_Replication

 

Step3

Click on Replicated Servers option and new dialog box will appear which will show that replication will show in healthy state.

Replicated Server Healthy Status in Azure Portal

 

Step4

Migrate the server either using three dots at the right most corner or by simply selecting your VM which you are migrating. New tasks gets created and you can see in notification in Azure Portal at right corner. If you expand the task it will look like below.

Azure-Migrate-Server-Migration-Task-Status

Do not worry with failed status. This is snap taken of failed attempt. Main objective to understand all all tasks is being performed when we start migration.IT validates prerequisite which we have already done.

Then it will shutdown VMware Machine itself. Next it prepares for migration once third stage is successful it will create a virtual machine based on VMware machine configuration and finally it will bring up Azure Virtual Machine online for you.

Well done !!!! Your machine is successfully Migrated to Azure from VMware. Have a cup of coffee and come back for Post Validations.

Post Step after Migration to Azure from VMware

Post Migration step is simply environment based. It will depends upon your environment. I will mention few points to consider.

1. Update /etc/resolv.conf .It may have your domain and one DNS Server may be from Azure and one you may have from On- Premise for proper DNS Services.

2. Install OMS Agent and enable it to be persistent like below

# systemctl enable waagent

3. Configure GRUB like below

# cat /etc/default/grub 
GRUB_TIMEOUT=20
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX=" rootdelay=300 console=tty1 console=ttyS0 
earlyprintk=ttyS0 crashkernel=auto rd.lvm.lv=rootvg/rootvol 
rd.lvm.lv=rootvg/swapvol rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
GRUB_TIMEOUT_STYLE=menu
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"

# grub2-mkconfig -o /etc/grub2.cfg

4.  Remove VMWare Tools

# rpm -qa | grep -i open-vm
open-vm-tools-desktop-10.1.10-3.el7_5.1.x86_64
open-vm-tools-10.1.10-3.el7_5.1.x86_64
# rpm -ev open-vm-tools-desktop-10.1.10-3.el7_5.1.x86_64
Preparing packages...
open-vm-tools-desktop-10.1.10-3.el7_5.1.x86_64
# rpm -ev open-vm-tools-10.1.10-3.el7_5.1.x86_64
Preparing packages...
open-vm-tools-10.1.10-3.el7_5.1.x86_64

5. Take a final Reboot and you are done.

Conclusion

This is step by step guide on how to migrate to Azure from VMware. This procedure have been tested many times by us with our environment .Environment may differ so advise take a rough idea from this guide to perform migration in your environment not just simply copy and paste.

We will not be responsible for any damage happens which is not expected as maximum result your migration may fail but if you want foolproof plan just have snapshot of virtual machine in VMware before work. You will be able to easily revert back in case of failure.

This step by step guide share with sole purpose to make you understand the process of migration from VMware to Azure. I guess you will find it helpful. If you like our work. Please like and subscribe and share as much as you can to required audience and allow post to reach right audience.

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