Aws cli add instance to target group

1. Can an EC2 instance be part of multiple target groups?
2. How do I add a target group to an existing load balancer?
3. How do I add an instance to a patch group?
4. Can an EC2 instance be in two subnets?
5. Can an instance have 2 security groups?
6. What is the difference between ALB listener and target group?
7. Can I attach a target group to multiple load balancers?
8. What is EC2 target group?
9. Can we attach a security group to multiple instances?
10. How do I add a port to a security group?
11. What is the difference between ALB listener and target group?
12. How do I get a list of targets in AWS target group via CLI?

Can an EC2 instance be part of multiple target groups?

Target groups route requests to one or more registered targets, such as EC2 instances, using the protocol and port number that you specify. You can register a target with multiple target groups.

How do I add a target group to an existing load balancer?

In the navigation pane, under Load Balancing, choose Target Groups. Choose Create target group. For Choose a target type, select Instances to register targets by instance ID; IP addresses to register targets by IP address; or Application Load Balancer to register an Application Load Balancer as a target.

How do I add an instance to a patch group?

To add EC2 instances to a patch group (Amazon EC2 console)

In the Actions menu, choose Instance settings, Manage tags. Choose Add new tag. For Key, enter Patch Group or PatchGroup . If you have allowed tags in EC2 instance metadata, you must use PatchGroup (without a space).

Can an EC2 instance be in two subnets?

Using this solution, you can place instances launched by EC2 Auto Scaling in two different subnets of your choice. For example, you can have one elastic network interface in a public subnet and the other in a private subnet.

Can an instance have 2 security groups?

You can assign multiple security groups to an instance. Therefore, an instance can have hundreds of rules that apply.

What is the difference between ALB listener and target group?

A Target Group is used to route requests to one or more registered targets (your backed EC2 instances). A listener is a process that "TCP Listens" for requests from clients. Common listeners are for receiving requests on port 80 (HTTP) and port 443 (HTTPS). The listeners then forward requests to your Target Group.

Can I attach a target group to multiple load balancers?

You can attach a target group to multiple load balancers. However, you can't attach a target group to ports with the same number on different load balancers. For example, if a group is attached to a load balancer on port 8080, you should attach it to another load balancer on port 8081.

What is EC2 target group?

A target group tells a load balancer where to direct traffic to : EC2 instances, fixed IP addresses; or AWS Lambda functions, amongst others. When creating a load balancer, you create one or more listeners and configure listener rules to direct the traffic to one target group.

Can we attach a security group to multiple instances?

Caution Because you can assign multiple security groups to an instance, an instance can have hundreds of rules that apply. This might cause problems when you access the instance. Therefore, we recommend that you condense your rules as much as possible.

How do I add a port to a security group?

To open a port for inbound traffic, add a rule to a security group that you associated with your instance when you launched it. To connect to your instance, you must set up a rule to authorize SSH traffic from your computer's public IPv4 address.

What is the difference between ALB listener and target group?

A Target Group is used to route requests to one or more registered targets (your backed EC2 instances). A listener is a process that "TCP Listens" for requests from clients. Common listeners are for receiving requests on port 80 (HTTP) and port 443 (HTTPS). The listeners then forward requests to your Target Group.

How do I get a list of targets in AWS target group via CLI?

We are trying to get the state of a registered target (instance) in a target group. This can be done with the command aws elbv2 describe-target-health --target-group-arn $TG --targets Id=$ID,Port=$PORT, reference.