I am trying to create an instance into my already created VPC network. For some reason when I am in the middle of the launch, I cannot select my VPC and it only lets me select a default VPC which is not what I want.
The reason for grey-out is because the VPC is created with "dedicated" tenancy. Changing the VPC to"default" tenancy will solve the issue. Apparently, there is no option to make that change in the AWS GUI. Either you have to delete and re-create the VPC with default tenancy or modify the tenancy value using the AWS CLI.
To modify the instance tenancy attribute of a VPC using the AWS CLI
Use the modify-vpc-tenancy command to specify the ID of the VPC and instance tenancy value. The only supported value is default.
aws ec2 modify-vpc-tenancy --vpc-id vpc-1a2b3c4d --instance-tenancy default
Alright so the solution was that the AMI was not compatible with my Dedicated Tenancy on my VPC so I had to delete and redo the entire VPC as default instead of Dedicated.
You probably does not have any Subnet private or public in your VPC can you please confirm?
I want to also point out that the AZ may not have any instances of that TYPE available. This will cause the VPC to be greyed out as well. I was trying to create a t2.medium or below in us-east-1c and I was seeing my VPC greyed out until I changed to an M or T3 type.
Related
I've got an OLD AWS account that apparently does NOT have a default VPC:
aws ec2 describe-security-groups --group-names webserviced --region us-west-1
A client error (VPCIdNotSpecified) occurred when calling the DescribeSecurityGroups operation: No default VPC for this user
There's no switch on create-vpc...only a boolean (IsDefault) in the output. I'm trying to replicate my infrastructure to the east coast and this is blocking me :( I don't have ANYTHING created on the east-coast (except for a single VPC that apparently isn't set as the default) so I'd at least like to figure out how to do it there so I don't have these issues in the future.
How can I define a default VPC?
P.S. Please don't say that I can't because there's already one defined...unless there's something I'm missing in which case I'd expect a big explanation :)
You cannot mark an existing VPC as a default VPC. You have to contact AWS support to mark your created VPC as the default VPC.
You must provide the following details: your AWS account ID, the region, and the subnet ID. To ensure that your new default subnet behaves as expected, modify the subnet attribute to assign public IP addresses to instances that are launched in that subnet.
I can confirm that it's not possible to set a custom VPC to your default VPC. Most use-cases don't require a lot of customization on a VPC since you can map the network in/out of the tunnel.
Now you can create a New Default VPC using AWS Console or CLI.
I was wondering if it's possible to remove an ec2 instance from VPC. If so, how can i do it? I was doing some tests and and i would like to remove my instances without terminate all of them.
Thank in advance.
You cannot move an instance between VPC and non-VPC, only launch new instances.
The 'opposite' of VPC is called EC2 Classic. As you can tell by the name, Amazon is depreciating this mode. All new accounts since December 2013 are VPC only. Several new features only work in VPC (for example, 'Enhanced Networking').
The writing is on the wall: You will need to move to VPC sooner or later. During the migration, you can use EC2 ClassicLink to let your EC2 Classic boxes talk with boxes in your VPC groups.
Remeber that when you create an instance, you specify the VPC that it will be launched in. It is not possible to change the VPC without terminating the instance and re-launching it in the new one.
One possible option would be to create an AMI of your currently running instance, and relaunch it in your preferred VPC using that AMI.
I'm following AWS's instructions Scenario 2: VPC with Public and Private Subnets and am having issues at the point I try to launch a DB server.
When I launch my instance, all is fine and I am able to assign it to my newly created VPC. However, when it comes to launch the RDS, the only VPC available (on step 4, configure advanced settings) is the default VPC (ie not the one I created as per their instructions).
Has anyone any idea about this or indeed how to resolve it?
RDS requires a little more setup than an EC2 instance if you want to launch it within a VPC.
Specifically, you need to create:
a DB subnet group within the VPC
a VPC security group for the RDS instance
The documentation is a little buried in the AWS RDS documents. It can be found here:
Creating a DB Instance in a VPC
We have couple of RDS that are not added under VPC, so we need to bring them under VPC. Please let me know the steps and downtime expected. Also let me know if there need to be any changes in the webservers, so that everything works fine after RDS is under VPC.
You must have a VPC created before hand that have subnet in atleast two different regions.
After this go and create a "subnet group" for RDS and add two existing subnet in that.
Next take a snapshot of your RDS instance and start a new RDS instance from snapshot in VPC.
That should be it.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.html#USER_VPC.Non-VPC2VPC - official documentation from Amazon.
Depending on your configuration and if the RDS needs to be accessible from the Internet you will have to check the option "Publicly Accessible" in the creation wizard and (in addition to the subnets mentioned in other answers) ensure that the Security has port for the DB properly enabled (and maybe from 0.0.0.0/0).
My client has many EC2 instances running, and a VPC (virtual private cloud) running.
I'm using a platform called Starcluster to launch nodes, and I need to know if they're in the VPC or just ordinary EC2 nodes. How can I do that?
Amazon's VPC console at this address:
https://console.aws.amazon.com/vpc/home?region=us-east-1
shows:
1 VPC
3 Running Instances
but some of those running instances are non-VPC instances, as far as I know. Hints?
On AWS Console you can see it. Just like below:
When you select an instance in the EC2 Instances screen, you can see a bunch of fields under the Description tab. Look for a field called "VPC ID". If there is no value for that field, it is not in a VPC.