Does anyone know what the difference between Automatic Load-based Scaling vs having explicit auto scaling groups on OpsWorks is?
this: http://docs.aws.amazon.com/opsworks/latest/userguide/workinginstances-autoscaling-loadbased.html
vs https://aws.amazon.com/blogs/devops/auto-scaling-aws-opsworks-instances/
With load-based instances, how does one add one to a target group?
Can you have multiple auto scaling groups in one layer of OpsWorks?
I’m looking at going with an ALB to route our traffic, which cannot act as an independent layer in Opsworks.
So I would need to pipe requests to 1 auto scaling group for one type of requests and the rest to the other other auto scaling group.
I just am not sure what load-based instances are and am perplexed by them not providing a default number of machines to start with.
Which one should I use for ALB routing traffic between the two groups?
Let me divide the answer for you.
Does anyone know what the difference between Automatic Load-based Scaling vs having explicit auto scaling groups on OpsWorks is?
Automatic Load-based Scaling:
Amazon Opsworks Service provides you the the feature, automatic load-based scaling where you can add instances to your layer in stack and set the auto scaling configuration policies directly. Load based scaling scales up or down the instances based upon the load you have set to handle. You need to set the threshold, using the parameters and define the scaling policies.
Explicit Auto Scaling groups on OpsWorks:
Amazon Opsworks Service allows you to add existing instances to your layer in stack. Which means You can set an autoscaling launch configuration and set the scale up and scale down events based on the load. Then create an Autoscaling group and launch instances in it. Then you can go to Opsworks and add these existing instances to your layer in stack. So when the load increases or decreases more or less than the threshold set, the Autoscaling group handles the scaling.
With load-based instances, how does one add one to a target group?
Once you have the Load based Instances Ready either you have launched then directly from Automatic Load-based Scaling in Opsworks or Explicitly using Auto Scaling groups on OpsWork, you can go to Application Load balancer in EC2 Console and configure with necessary configurations and then register the load based instances you have just created with ALB in Register targets TAB.
Can you have multiple auto scaling groups in one layer of OpsWorks?
Yes, you can have multiple auto scaling groups in one layer of OpsWorks.
Which one should I use for ALB routing traffic between the two groups?
You can use any of the group.
so that you can pipe requests to 1 auto scaling group for one type of requests and the rest to the other other auto scaling group.
Please Refer Autoscaling once.
I just am not sure what load-based instances are
Load Based Instances are the instances which are configured with Load based scaling configuration. You need to set the threshold,configuration and the events to define when to scale up and scale down. EX: Suppose, If you have 5 instances running at initial stage and as you want your application to be running even your load increases to minimize your downtime, you will set autoscaling configuration such that if average CPU utilization of instances increase more than 70% launch 2 more instances. You can set scale up and scale down on many more factors.
Hope it Helps:)