I have a Fargate Service running in AWS. I use it to run multiple tasks. Some of the tasks connect to an RDS database to query the database.
How can I add the Fargate Service to my inboard rules of a Security Group for the RDS database? - Is there a way to associate an Elastic IP with the Fargate Cluster?
Might have misunderstood something here... But the ECS allows you specify a security group at the service level.
Go to https://docs.aws.amazon.com/cli/latest/reference/ecs/create-service.html
And search for the --network-configuration parameter
So surely you just need to set the source on your inbound rule of the RDS security group to be that security group ID?
Fargate doesn't support associating Elastic IPs with clusters. Clusters which runs in Fargate mode operate on instances which are not yours, it's the opposite of classic ECS stacks. That means you can't manage networking of host instances.
There is a way to associate IP with stack by having a Network Load Balancer in front of cluster. Then you could add a rule which allows connect your cluster through NLB.
Related
I created an NLB and a fargate service.
Then i create a target group with "ip" of my ecs instance.
When i now add a fargate ip to my target group, it works, but how does the scaling work? Suppose ecs has to scale out, i will have to register another ip, but i want it to scale automatically.
Let us say one task is added. How does the network load balancer the new task ip without me manually adding it?
I do not get, how the link is between the nlb and the service of ecs. Does amazon does add targets implicitly?
Instead of manually registering the IP of your Fargate task with the target group, you are supposed to configure the ECS service with knowledge of the load balancer you want to use. The ECS service will then automatically register every task that it creates as part of deployments and auto-scaling.
I have 3 AWS Elastic Beanstalk instances which are running Spring microservices. All microservices are making POST requests to each other and using RDS service for database.
Should I isolate database traffic and microservices traffic into separate subnets?
In case it's a good practice is it possible to assign 2 private network IP's for each subnet for every AWS Elastic Beanstalk instance?
I think you cannot do it using EBS as the instances will auto create and terminate. So you should try to create instances separately and add autoscaling policy on it.
What I usually do is create my EC2 instances in Public subnet and RDS in private subnet and use RDS Security Group and add EC2 instance's Elastic IP, so that all the traffic is going through the EC2 instance and all the traffic coming to EC2 instance is HTTPS coming from ELB.
Adding the below steps as requested:
Ok, So I am assuming you already know a bit about how to create the servers and RDS etc.
Create an EC2 instance for each of your microservices.
Attach an EIP to each of these instances.
Add an Auto-Scaling policy to increase or decrease the instances based on the traffic/CPU Utilization. Make sure you terminate the newest created instance.
Add an ELB for this instance and add HTTPS/SSL certificate to secure your traffic.
Create RDS in a Private subnet and add instance EIP in RDS SG for 3306 port.
I think you should be able to do this then.
It's not a good practice to directly communicate between instances in EB. The reason is that that EB instances run in autoscalling group. So they can be terminated and replaced at any time by AWS leading to change in their private Ip addresses.
The change in IP will break your application sooner or later. Instances in EB should be accessed using Load Balancer or private IP.
So if you have some instances that are meant for private access only you could separate them to internal EB environment.
I did not quite understand the configuring of VPC "CIDR block" while creating fargate cluster. Based on the link https://www.datadoghq.com/blog/aws-fargate-metrics/, there is a fleet that runs outside my VPC that has the infrastructure to run my fargate tasks.
What I dont understand if I configure a dedicated VPC for my fargate cluster. How does it connect with dedicated AWS managed infrastructure for fargate.
I did not find any documentation with some explaination.
After googling for sometime, found this https://thenewstack.io/aws-fargate-through-the-lens-of-kubernetes/
The author states the VPC configured during fargate cluster creation acts as proxy and requests are fwded to EC2 instance running in VPC owned/managed by AWS. Configuring VPC serves the purpose of controlling the IP range of ENI attached to containers. This is based on my observation, need something more to back it up.
I am facing an issue while using AWS - ECS service.
I am launching my ECS cluster with 2 instances. I use EC2 service. Not Fargate. I am trying to use the awsvpc networking for the ECS containers. Morte info is here.
For the container load balancing , target type is IP. It is not editable.
Now the problem is - Auto Scaling Group can not be created for this target group to scale the cluster.
How do you guys handle the situation?
Simply leave out the load balancing configuration for the Auto Scaling group.
awsvpc creates a separate network interface whose IP address is registered to the Target Group. This target group has to be of the ip-address type.
Auto Scaling Groups use the instance target group type, that uses the default network interface of the EC2 instances.
Since the Task will get its own IP address, which is separate from the IP address of the EC2 instance, there is no need to configure load balancing for the EC2 instances themselves.
This is because of awsvpc mode,awsvpc network mode is associated with an elastic
network interface, not an Amazon EC2 instance so you must choose IP. Here is what AWS said about AWVPC network mode .
AWS_Fargate
Services with tasks that use the awsvpc network mode (for example,
those with the Fargate launch type) only support Application Load
Balancers and Network Load Balancers. Classic Load Balancers are not
supported. Also, when you create any target groups for these services,
you must choose ip as the target type, not instance. This is because
tasks that use the awsvpc network mode are associated with an elastic
network interface, not an Amazon EC2 instance.
Fargate do not to manage EC2 instances, the purpose of Fargate is not to manage server then why you need to attach auto-scaling? you can scale services.
AWS Fargate is a technology that you can use with Amazon ECS to run
containers without having to manage servers or clusters of Amazon EC2
instances. With AWS Fargate, you no longer have to provision,
configure, or scale clusters of virtual machines to run containers.
This removes the need to choose server types, decide when to scale
your clusters, or optimize cluster packing.
https://aws.amazon.com/blogs/compute/aws-fargate-a-product-overview/
Here's the scenario -
We're spinning up a few Instances via Cloudformation Autoscaling group which attaches instances to an Elastic Load Balancer using CloudFormation. The intent is, before the ELB starts serving traffic to these instances, we want to perform a few curl tests and once those look good - enable traffic flow to the instances via ELB.
Question : Is there a way to prevent the Elastic LoadBalancer to NOT send traffic to the instances until we allow it?
If not - is there a way to remove the "Attached Instances" to ELB as part of CloudFormation script itself? (so that we can manually re-attach them once we complete our tests).
Does Application Load Balancer work perhaps instead of Elastic Load Balancer in case ELBs are not sufficient?