I am hosting content on AWS and want to configure my DNS settings so that both my # record and www record point at my Elastic Load Balancer.
example.com (# record)
www.example.com (www record)
AWS recommends setting up domains using CNAMEs as the IP addresses can change.
All the documentation I have seen on the CNAME is that they deal with subdomains but not the primary domain itself (http://example.com
). The primary domain requires an A record and therefore must require an IP address.
I do not want to use an A Record to point the traffic to my Elastic Load Balancer as the IP address may change.
Any idea how I can get around this issue?
I am using Linode to manage my DNS.
You can use a special record type in Route 53 called "Alias".
Q. Can I point my zone apex (example.com versus www.example.com) at my
Elastic Load Balancer?
Yes. Amazon Route 53 offers a special type of record called an ‘Alias’
record that lets you map your zone apex (example.com) DNS name to your
ELB DNS name (i.e. elb1234.elb.amazonaws.com). IP addresses associated
with Amazon Elastic Load Balancers can change at any time due to
scaling up, scaling down, or software updates. Route 53 responds to
each request for an Alias record with one or more IP addresses for the
load balancer. Queries to Alias records that are mapped to ELB load
balancers are free. These queries are listed as
“Intra-AWS-DNS-Queries” on the Amazon Route 53 usage report.
Source: https://aws.amazon.com/route53/faqs/
Just set the Alias to Yes and you will be able to choose your load balancer from the dropdown menu:
Related
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
So there is my load balancer with allocated dns name and group policy - the question how my customer could link it with his hosted zone's record?
and how I could open inbound connection for that domain name?
For now as a workaround I've created hosted zone record in my acc linked to this load balancer ... and created hosted zone record in his route53 to ip (which atm points to my record) ... BUT I think it doesn't actually point to load balancer, but only to it's node ... and I have this problem since obviously ssl certs don't match
NET::ERR_CERT_COMMON_NAME_INVALID
Could somebody point to right solution of this problem ... ?
Your customer provisions a Route 53 Alias record in the normal way, but instead of selecting the balancer from the list of targets (since it isn't shown), your customer will need to paste the DNS Name of the balancer in the box.
If you used different accounts to create your Route 53 hosted zone and your load balancer – Enter the value that you got in the procedure Getting the DNS Name for an ELB Load Balancer.
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-values-alias.html
I've set up my application on AWS Elastic Beanstalk. I added a load balancer and pointed a CNAME for 'www' to it. But now I need to get root pointed there too. I can't use Route53 and use AWS nameservers because the client wants to use theirs. How can I get root to my app? Can I redirect the traffic? The tech lead I'm working with suggested setting up a server to do the redirect?
Since AWS ELB's only offer DNS Record (Instead of IPs) you need to use a CNAME mapping. However with DNS, CNAMEs do not allow root domain to point to it. To overcome this AWS has provided Alias Records (Custom implementation to AWS) to point root domain to ELBs.
If your client want to use their nameservers still you can use, AWS Route53 in between to solve this with following steps.
First create a Public Hosted Zone in Route53 for your domain.
Then create a record set inside the Hosted Zone for the root domain to point to the ELB with Type = A - IPv4 Address, Alias = Yes with ELB CNAME as for the Alias value.
In the external domain management service, create a NS record to point the root domain to Route53 nameservers.
Then when the DNS resolution happens, the root DNS query will first go to external nameservers(Managed outside of Route53) and then it will be forwarded to route53 where it will resolve the ELBs IP address and sent back.
You can set up a machine with a single static IP address that does nothing but redirect requests to the www host. Then you can put an A record on the bare domain at the apex of the DNS zone pointing to that machine.
There is at least one service, http://wwwizer.com/naked-domain-redirect, that will do this for you. (I'm not affiliated with this service, but it appears to do what it claims and will serve your purpose. There are probably others like it.)
Ideally, though, you'd persuade your client to change the authoritative nameservers to point to a Route 53 hosted zone that you create for them. They are still the registrant and "owner" of their domain, and can take control back from you by simply changing the nameservers to something else.
I generally persuade clients with the explanation that our load balancer infrastructure is integrated with the DNS servers so that if a balancer node fails, or we need to add or scale up capacity, or experience a traffic surge or DDoS event, the load balancer system will automatically update the DNS records for their domain to try to mitigate the issue and keep the site up. To do otherwise is to do things in such a way that removes those layers of redundancy.
Ideally, you can set up a apache server with a static IP, and install a free SSL certificate on that web server at first.
Second you need to redirect your root domain name request to AWS ELB.
Then go to your DNS management and set up your apex point to the server you created.
It is now possible to setup a Network Load Balancer and allocate one or more Elastic IP Addresses to it (one per Availability Zone). The Network Load Balancer can have an Application Load Balancer as a target. The Application Load Balancer would target the Elastic Beanstalk. An A record can then be created in the external DNS for each Elastic IP Address of the Network Load Balancer.
If you don't need the functionality that the Application Load Balancer provides, you may be able to target Elastic Beanstalk or whatever application directly from the Network Load Balancer.
Since AWS ELB's only offer DNS Record (Instead of IPs) you need to use a CNAME mapping. However with DNS, CNAMEs do not allow root domain to point to it. To overcome this AWS has provided Alias Records (Custom implementation to AWS) to point root domain to ELBs.
If your client want to use their nameservers still you can use, AWS Route53 in between to solve this with following steps.
First create a Public Hosted Zone in Route53 for your domain.
Then create a record set inside the Hosted Zone for the root domain to point to the ELB with Type = A - IPv4 Address, Alias = Yes with ELB CNAME as for the Alias value.
I have a load balanced environment (min nodes 2, max nodes 4).
The DNS CNAME points to the AWS DNS name for the Elastic Beanstalk, e.g...
awseb-e-a-awsebloa-XXXXXXXX-YYYYYYY.eu-west-1.elb.amazonaws.com
My DNS A-record points to the static IP (elastic IP) of the first EC2 instance (I manually associated the EC2 IP address).
This means anyone referencing www.mydomain.com will go through the CNAME and therefore will be load-balanced.
Anyone accessing without the www prefix (mydomain.com) will go through the A-record and hit the first EC2 instance.
My question is, how can I make the A-Record point to the Elastic Beanstalk instead? I don't want to type its current IP address - because that could change, but I'm more than conscious that pointing to a single node isn't great either.
Since the IP address of the ELB may change time by time, you should create an Alias record with Route53 instead.
https://aws.amazon.com/route53/faqs/#which_dns_records_are_supported
Additionally, Amazon Route 53 offers ‘Alias’ records (an Amazon Route
53-specific virtual record). Alias records are used to map resource
record sets in your hosted zone to Amazon Elastic Load Balancing load
balancers, Amazon CloudFront distributions, AWS Elastic Beanstalk
environments, or Amazon S3 buckets that are configured as websites.
Alias records work like a CNAME record in that you can map one DNS
name (example.com) to another ‘target’ DNS name
(elb1234.elb.amazonaws.com). They differ from a CNAME record in that
they are not visible to resolvers. Resolvers only see the A record and
the resulting IP address of the target record.
I have an issue that current registrar allow only ANAME reference, so I have a an Elastic ip for all my web settings. I would like to assign it to the load balancer and then load balancer will decide who is going to handle it.
I cannot find a way to create it with Route 53. I cannot add my route 53 domains to my registrar and would appreciate any advice.
Thank you.
Change your ANAME record to an A record that has the EIP of your Load Balancer. You can set a high TTL, because "your" EIP won't change. You don't even need your web servers in DNS. Your Load Balancer should just have a list of their IPs.
It will look like this:
1) Client does a DNS lookup for foo.com
2) Client gets A record that has (E)IP of LB
3) Send request to LB's IP
4) LB distributes traffic to web servers
If your LB dies, spin up a new one and move the EIP to it.
You should have your registrar use Route 53 as its Nameserver. In Route 53 create a hosted zone and use an A record of type Alias and choose the Elastic Load Balancer Endpoint.