Can we launch an instance in multiple region in AWS? I know the concept of Elastic IP or taking a snapshot or copying an IAM. Can we do this in other regions without minimal downtime?
It's not possible to launch an EC2 instance in multiple regions. An EC2 instance can only exist in a single availability zone, in a single region.
You can launch multiple copies of your AMI images (EC2 instances) in multiple availability zones, in multiple regions.
Once you have your EC2 instance running in a single availability zones, you can create an AMI image from that EC2 instance and launch copies in other availability zones in the same region. Creating an AMI doesn't have to cause downtime, however, it is recommended to stop the EC2 instance while the AMI image is created. So best to create the AMI image before the EC2 instance needs to be up 100% of the time.
You can also copy that AMI from the original region to another region. Once copied, you can launch new EC2 instances in that second region.
Elastic IP addresses can only be attached to a single EC2 instance in a single region at a time. It is not possible to move or copy Elastic IP addresses between regions.
Related
In the start when I was new to aws I was not knowing that how much the selection of regions impact the performance of the system. At that time I created my ec2 and rds instances in sydney but the system will be used in Mexico which is 14000+ km away from Sydney.
Now a lot of configurations are done on those instances. Is there any way I can move these instances to another region?
similarly how i can move other configuration like route 53 and elastic ips as well?
It's not possible to move an existing instance to another subnet, Availability Zone, or VPC. Instead, you can manually migrate the instance by creating a new Amazon Machine Image (AMI) from the source instance. Then, launch a new instance using the new AMI in the desired subnet, Availability Zone, or VPC. Finally, you can reassign any Elastic IP addresses from the source instance to the new instance.
More details in: Move an Amazon EC2 instance to another subnet, Availability Zone, or VPC
My AWS solution spans over 3 availability zones. In my backend the user is able to trigger a heavy compute job with beefy px instances. Therefore I wrote a CFN template, which provision all resorucess to execute the compute job (secret store, IAM Role, EC2 instance, log group). However when I try to create the template, it returns with a 500 and states that no capacity for my instance type is available for the availability zone i choose. My template provides a subnet for the EC2 instance and an availability zone for the attached volume. In the end I don't care in which availability zone the ec2 is provisioned as long it is in one of my subnets. Does someone know a way to provision an EC2 instance and it's volume (with cloudforamtion) by not specifically choosing one availability zone, but rather provide a range of subnets/availability zones ?
TLDR:
Does someone know a way to provision an EC2 instance and it's volume (with cloudforamtion) by not specifically choosing one availability zone, but rather provide a range of subnets/availability zones ?
When a AWS Auto Scaling Group is scaling out which ec2 instance is considered to be Primary?
Meaning if my ASG is scaling out which ec2 instance ASG considers as a base instance?
Because if I am making changes in the First ec2 instance I created those are not transfered to other new ec2 instance created by ASG
Data is not automatically copied from existing instances to new instances. You can use lifecycle hooks to copy the data or an Amazon RDS database including replicas.
https://docs.aws.amazon.com/autoscaling/ec2/userguide/lifecycle-hooks.html
Wanted to know more about internals of AWS when we autoscale an instance from one tier to another. Does AWS creates an image and spins up new instance and restores the image ? or what exactly happens inside. ?
Amazon EC2 Auto Scaling will either Launch a new instance or Terminate an existing instance. This is known as horizontal scaling. No instance is "upgraded".
In fact, it is not possible to "upgrade" an Amazon EC2 instance. Instead, you need to Stop the instance, change the Instance Type, then Start the instance again. This will launch the instance on a different host, which is dedicated to running the new Instance Type.
The disks used on Amazon EC2 are (typically) Amazon Elastic Block Store (EBS) volumes. These are network-attached volumes that exist separately to the EC2 instance. Thus, the disks are preserved when the instance is stopped and they are automatically reattached to the instance when it is started again.
I am looking to migrate an application from one vpc to another. Currently, the application's ec2 instances utilize a nfs which I created from another ec2 instance and ebs volumes. These application related instances (web and app) as well as the nfs instance reside in one VPC (Let's call it VPC "A").
My question is how would I go about transferring the ebs data from the existing nfs in VPC "A" into an efs in VPC "B"? Additionally, the rate of data transfer is not relevant, so the file system's performance mode is just defined as general purpose. Thanks!
Not sure if this answer was technically possible at the time the above answer was given, but a much easier way to achieve a solution providing that the asker did not to run both applications concurrently (ie. duplicate the data instead of just switch the VPC it was available from).
My company was switching to a new VPC, so I merely wanted to make the data available in the new VPC. Rather than copy it to EBS, unmount, remount, copy to EFS, I switched the mount points as described here:
http://docs.aws.amazon.com/efs/latest/ug/manage-fs-access-change-vpc.html
IMO this is much simpler if you don't need to actually duplicate the data.
For backing up the data, AWS has a workflow outlined:
http://docs.aws.amazon.com/efs/latest/ug/efs-backup.html
It sounds like your requirement is to transfer the contents of an Amazon EBS volume in one VPC to a different VPC. It is unclear whether your NFS server is hosted from EC2+EBS, or whether it is running from Amazon EFS. I'll assume it is EC2+EBS.
A few different options for you (pick one!):
Create an AMI: Create an AMI of the Amazon EC2 instance running the server. Then launch a new instance in VPC B using that AMI.
Move the disk: Turn off the EC2 instance. Detach the EBS volume, the attach it to a different instance running in VPC B. Configure as necessary.
Use an EBS Snapshot: Snapshot the EBS volume that holds the data, create a new EBS volume from the snapshot (in the desired AZ), attach the EBS volume to the EC2 instance in VPC B.
However, if your server is running on Amazon Elastic File System (EFS), then you would need to copy the data to an EBS volume, detach the volume and attach it to an instance in the VPC B, then copy the data from the EBS volume to a new EFS share in VPC B.