I want route53 to failover from ALB1 to ALB2.
I've set up a DNS hosted zone, using ALB FQDN, set up Alias record for ALB1, set failover routing policy, based on a health check using ALB1 endpoint FQDN, also set up Alias record for ALB2 as secondary.
Each ALB has a target group of two ec2 running simple apache website.
ALB1 has two ec2, I tried shutting them, and/or turning httpd, to simulate failed health check and each time this happens, I get bad gateway error message. It doesn't seem to want to failover to ALB2.
What am I doing wrong/incorrectly or don't understand? My goal is to simulate a failover.
Please advise.
You need to have your own domain. You can't re-define AWS owned domain that is provided to you by your ALB. Then you create the R53 fail-over records for your own domain, e.g. myapp.org.
Related
I have my site hosted on an EC2 instance using nginx and I use Route 53 to route traffic to it.
Is it possible to have a setup where, if my EC2 instance is down for maintenance, I can have all traffic automatically routed to a different instance/server instead?
Where should I start looking/reading?
Yes, you can by setting up DNS failover in Route53:
You can configure Route 53 to check the health of those servers and to respond to DNS queries for example.com using only the servers that are currently healthy.
I have configured the AWS load balancer to secure my website, i.e. to resolve through "https". But when I use(https://www.schoolnskill.com), it gives
503 Service Temporarily Unavailable.
So I have followed the below steps to configure my environment.
I created a domain name in route53 and have been issued with a SSL/TLS certificate through AWS Certificate manager.
For my load balancer I set up listener for https:443 and attached the above certificate with it.
The security group for my ec2 instances allow http and https requests (although I believe the load balancer ec2 target will communicate using http).
I have attached a screenshot with the summary of the configuration.
Then in the ROUTE 53, I edited the 'A' record of 'www.schoolnskill.com'. Below are the changes I made.
Alias:- yes
Alias target:- chosen the application LB
Routing policy:- simple
Then save the settings.
I can see that whenever I type 'http://www.schoolnskill.com', it is redirected as 'https://www.schoolnskill.com'
Health_CHK
Thank you,
The problem was the availability zones. The AZ of my load balancer was different from that of EC2 instance. I matched the AZ of ALB to my EC2, and it worked.
Thank you,
I have two different accounts:
One in Europe eu-central-1: Have the Route53 DNS entries from domain
Another in China cn-north-1: Have the ALB resource and the EC2 resource.
In China, my service is a concourse pipeline. The service is up and running on the instance, and on the target groups I can see the healthy flag. At the instance as well I can access the web page by curl localhost:8080.
I have the entry:
concourse.domain.name CNAME web.account.info.eu-central-1.elb.amazonaws.com
I Can resolve the entry and it's point to the right alb. But still, no answer.
Does anyone have any ideas?
Thanks.
There would be 2 steps to follow to find the route case.
If your ALB public DNS name is working and routing traffic to your instance then please check the value of the "Hosted zone" in the property of ALB and Route 53 match.
If your ALB does not routing traffic make sure your have set up Listener for each traffic type (http,https...ect) which your application is about to listen to and also have target group for perspective port(80,8080...)for each listener traffic type.
Make sure each target group has at least one instance to handle each type of traffic on each port.
Hope this was helpful
I'm trying to setup my website (on AWS). I have a t2.micro instance running on the us-east-1 region, and a Load Balancer (availability zones are us-east-1d and us-east-1c). I bought my domain using route 53, and also used the certificate manager to generate my SSL certificate (which I have attached to the load balancer).
My problem is that the load balancer seems to always send me to the root domain and it completely ignores the 2 subdomains I have setup on the EC2 instance. They were working perfectly until I created the ELB. So how can I get the subdomains working with the ELB? Or is this not the proper way of doing it? Can anyone point me to the right direction?
Thanks
You need to look at the application load balancer's rules. You can direct traffic based on the requested host name, or path. For example you can send app.example.com to one target group or blog.example.com to another group. Or you can route paths to individual target groups; for example example.com goes to your site, but example.com/cart goes to a microservice running your shopping cart.
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.