I have set ALB with fargate, currently I can access to ALB with dns name like this
myapp-LoadB-FDEWFSOAQXD4-f18c75dd4249a10d.elb.ap-northeast-1.amazonaws.com
However it is said this DNS could be changed.
So I want to give this the Elastic IP
I have experienced connection EC2 and Elastic IP.
In Elasitc IP panel I can choose instance.
However, there is not ALB is listed.
How can I set Elastic IP to ALB ? or am I wrong basically?
Two options here, depending on what kind of direction you are heading:
If you do not like the default DNS name
You can create a DNS record that will point to your load balancer. This means that people would be able to surf to your website by using www.whitebear.com instead of myapp-LoadB-FDEWFSOAQXD4-f18c75dd4249a10d.elb.ap-northeast-1.amazonaws.com
See: Routing traffic to an ELB load balancer - Amazon Route 53
If you really want to attach an ElasticIp to a loadbalancer
There are some use cases where it is really needed to be able to surf to a loadbalancer using a fixed IP. You can achieve this by setting up a Global Accelerator on AWS.
With Global Accelerator, you are provided two global static public IPs that act as a fixed entry point to your application, improving availability.
More information can be found on the AWS Global Accelerator page
If you wish to create a 'friendly' name for an Application Load Balancer, you can create a CNAME record in your Domain and point it to the DNS Name of the Load Balancer.
If you wish to point the Apex of your domain (eg example.com), you can use an Alias in Amazon Route 53 to point to the Application Load Balancer. (It is not normally possible to point a Domain apex to a CNAME record, so the Alias capability of Route 53 will do it for you.)
See: Routing traffic to an ELB load balancer - Amazon Route 53
Related
We have a subdomain under our company domain for our application: myapp.company.com.
Few years ago the following setup was done
myapp.company.com points to an elastic IP (done by the company IT)
elastic IP targets an public internet facing EC2 instance
Now I'm trying to find a way to switch that setup so it make use of a classic load balancer.
I created an internet facing classic load balancer
is in the security group of the VPC in which the instance is
targets the instance which is currently reachable through the elastic ip
I'm able visit the web apps on the instance through the load balancer with the public ip defined in
the network interface of the load balancer.
After that, I thought a hosted zone would do the trick of routing the calls to myapp.company.com to the load balancer.
So I created a hosted zone
domain name when creating the hosted zone: myapp.company.com
added an A record which has the load balancer's dns name as alias target
But the load balancer is not used.
If you are going to use Classic Load Balancer, you need to make a note of the string from ELB DNS name (for example, my-load-balancer-1234567890.us-west-2.elb.amazonaws.com). After that, ask your IT support to modify DNS record for myapp.company.com to CNAME which points to ELB:
myapp.company.com CNAME my-load-balancer-1234567890.us-west-2.elb.amazonaws.com
(creating the hosted zone in AWS Route53 will only work after someone (zone owner, so probably IT) delegates authority for your (sub)domain to your AWS name servers, and it is most probably not worth doing just for the sake of one record)
It sounds like I cannot use an elastic ip with AWS Application Load Balancer.
I currently own a domain through GoDaddy and the DNS server points to the load balancer via the CNAME. However, if the load balancer dies and gets recreated, its url changes and I then have to change the CNAME and wait for the change to propagate.
There must be a solution around this - what is it?
It looks like the solution might be to use two load balancers - https://aws.amazon.com/blogs/networking-and-content-delivery/using-static-ip-addresses-for-application-load-balancers/, but this seems really excessive - I have a small application right now.
As far as I know, the only way to have a fixed static-IP for a LB is to use a Network Load Balancer.
As stated here
Support for static IP addresses for the load balancer. You can also assign one Elastic IP address per subnet enabled for the load balancer.
An Elastic Load Balancer retains its DNS name as long as you don't replace it manually. If you still want to have a temporary, low-cost solution to this problem, you can consider the following approach:
Assuming the application is deployed in a private subnet, I would proxy the traffic through an EC2 instance until your primary DNS changes propagate.
Launch a small EC2 instance and attach an Elastic IP to it (consider your bandwidth requirements to determine which size).
Configure a proxy (nginx) to forward traffic to your application.
Configure active-passive DNS failover using ELB DNS name and EIP.
Is it possible to assign a static IP to an AWS load balancer without the need to move your NS records to Route 53?
I basically just want to create an A record from my domain to point to the ELB.
Elastic Load Balancer is a distributed system. It does not have a single public IP address. Instead, when you create an ELB, you are given a DNS name such as ExampleDomainELB-67854125.us-east-1.elb.amazonaws.com.
Amazon gives a facility to set up a DNS CNAME entry pointing for e.g. www.exampledomain.com to the ELB-supplied DNS name.
Also, ELB is directing to one of your instances. Hence, creating a static IP address for ELB will not be feasible.
So as a solution if you need to set your 'A' record from your domain pointing to your ELB in Route53 :
Select 'Yes' for Alias.
Set Alias target as your Load Balancer DNS.
Second way is similar by selecting the CNAME in Route53 and pointing the Alias Target to your ELB.
This should help.
AWS Load Balancer is a very generic term.
You currently have three options for load balancing in AWS:
Application Load Balancers (ALB)
Network Load Balancers (NLB)
Classic/Elastic Load Balancers (ELB)
Of those three only one, the Network Load Balancer can have a static IP address. It's listed in the reference below.
Support for static IP addresses for the load balancer. You can also assign one Elastic IP address per subnet enabled for the load balancer.
It is also possible to "glue" an NLB and ALB together to provide a static IP address and application load balancer functionality. In general you allow a lambda to populate an NLB Target group with your ALB info. It's outside the scope of this answer but the link is below.
If you're using Route53 you can create an A record Alias for your Load Balancer.
If you're not, you can use a CNAME.
References
https://docs.aws.amazon.com/elasticloadbalancing/latest/network/introduction.html
https://aws.amazon.com/blogs/networking-and-content-delivery/using-static-ip-addresses-for-application-load-balancers/
ELB manage the IP for you, it just gives you the DNS name. So you can't control the IP behind it.
If you need an A record than you need to use A record alias from Route53.
Without using Route 53, you can use CNAME instead of A record.
I have just set up my first "Application Load Balancer" and I chose the SSL option to connect allowing AWS to generate the certificate for me based on my domain (www.example.com).
I have set the target to my EC2 instance and now I want to connect to the Load Balancer but not sure how. If I just connect to the DNS name of the load balancer I get an invalid certificate error.
I have read that I need to set a record for my domain but because the IP of an application load balancer may change, not sure if that is a good idea.
The documentation mentions the following:
Clients can use the Server Name Identification (SNI) protocol
extension to specify the hostname they are trying to reach.
But I couldn't figure out how to do that. I'm very new to Load Balancers and not quite sure how to proceed.
The following problem is easy to solve with AWS Route 53:
Create a hosted zone in Route 53
Choose the name of the hosted zone that has the domain name that you want to use to route traffic to your load balancer
Choose Create Record Set.
Specify the following values:
Name:
Type the domain name that you want to use to route traffic to your ELB load balancer. The default value is the name of the hosted zone.
For example, if the name of the hosted zone is example.com and you want to use acme.example.com to route traffic to your load balancer, type acme.
Type:
Choose A – IPv4 address.
Alias:
Choose Yes.
Alias Target
Find the applicable category in the list (ELB Application Load Balancers, ELB Classic Load Balancers, or ELB Network Load Balancers), and then choose the name that you assigned to the load balancer when you created it.
Routing Policy:
Accept the default value of Simple.
Evaluate Target Health:
If you want Route 53 to route traffic based on the health of your resources, choose Yes
Choose Create.
Also If you don't want to use Route 53 and if it's not at the apex, you use a CNAME to the ELB.
Refer to this Guide
Something like :
my.web.thingy.org CNAME my-loadbalancer-1234567890.us-west-2.elb.amazonaws.com.
And yes you are correct the IP of ELB Changes Frequently and thus it is not recommended to use A Record in DNS.
Hope this Helps
I've setup an internal load balancer for my SQL read servers in EC2, but I can't figure out how to point DNS at it. I have a private hosted zone in Route 53. When I attempt to setup an ALIAS record to the LB, the internal load balancer does not appear in the dropdown, though all the public LBs do, which leads me to believe I'm going about this the wrong way. None of my Googling has led me to any information specific to private load balancers, so maybe it's just not possible and I have to use the long AWS domain name?
My experience : I was trying to create single HTTPS contact point for my application, so I tried setting up internal load-balancer hoping when I point it to A Record in Route 53 it would work with just A Record url.
To answer your question :
Internal Load Balancers do list in Load Balancer listing for Route 53.
You can not use A Record url to publicly point to internal load-balancer unless you are actually connected to VPC