Why building disaster recovery site on the cloud?
Now a days we can see a lot of disasters that can take place which might affect your datacenter, so If you don’t a good business continuity and disaster recovery plan, this will affect your critical applications.
Building your disaster recovery site on the cloud is a great option as it:
- Provide you GEO redundancy.
- You can setup your Infrastructure fast.
- Pay for what you use. (You don’t pay for virtual machines until they are running)
Let’s know more about AZURE Site Recovery to build a disaster recovery site on AZURE.
- DNS traffic is routed via Traffic Managerwhich can easily move traffic from one site to another based on policies defined by your organization.
- Azure Site Recoveryorchestrates the replication of machines and manages the configuration of the failback procedures.
- Blob storagestores the replica images of all machines that are protected by Site Recovery.
- Azure Active Directoryis the replica of the on-premises Azure Active Directory services allowing cloud applications to be authenticated and authorized by your company.
- VPN Gateway: The VPN gateway maintains the communication between the on-premises network and the cloud network securely and privately.
- Virtual Network: The virtual network is where the failover site will be created when a disaster occurs.
How does Site Recovery do disaster recovery?
- After preparing Azure and your on-premises site, you set up and enable replication for your on-premises machines.
- Site Recovery orchestrates initial replication of the machine, in accordance with your policy settings.
- After the initial replication, Site Recovery replicates delta changes to Azure.
- When everything’s replicating as expected, you run a disaster recovery drill.
- The drill helps ensure that failover will work as expected when a real need arises.
- The drill performs a test failover without impacting your production environment.
- If an outage occurs, you run a full failover to Azure. You can fail over a single machine, or you can create a recovery plan that fails over multiple machines at the same time.
- On failover, Azure VMs are created from the VM data in Managed disks or storage accounts. Users can continue accessing apps and workloads from the Azure VM
- When your on-premises site is available again, you fail back from Azure.
- After you fail back and are working from your primary site once more, you start replicating on-premises VMs to Azure again.
- Create new virtual network on AZURE for disaster recovery (256 IP).
- Create Site-to-Site VPN tunnel between On-Premises and AZURE Hub network.
- Peer the new created virtual network to the Hub virtual network on AZURE.
- Extend On-Premises Active Directory to AZURE.
- Create new AZURE Recovery Service Vault
- Prepare Infrastructure (Setup a new ASR replication appliance).
- Enable replication.
- Manage recovery plans.
- Create and configure AZURE Traffic Manager.
- Test failover.