I have two ec2 instances and deployed java apps to '/var/www/html'.
They are running in port 9010 and I can access them by 'http://xxxx:9010'.
Next,I created elb and added the two instances to it.However,I can't access the java app by elb public dns 'http:elbxxxxx:9010'. It returned 404.
I put index.html to '/var/www/html/' , I can see index.html by elb public dns.
I'm looking for some configurations for ports in elb console but I can't.
How can I access them?
You have to configure a listener on the Elastic Load Balancer. Your listener can be configured to listen on any port (such as 80) and send the requests to your instances on port 9010. Here's how to configure listeners.
Related
So I've setup an AWS Lighsail load balancer and attached it to a single instance.
My instance is running a REST API on port 8080. I'd like to be able to route HTTP (and down track HTTPS) requests hitting the front end of the load balancer to port 8080 on my instance. By default the load balancer routes to port 80 on the attached instance.
I'd also like to change the default ports on the load balancer. The load balancer listens on ports 80 & 443. It says these are 'defaults' in the AWS Lightsail console.
I'm struggling to find any settings related to changing default ports or port forwarding.
Any help would be much appreciated...
Seem it's not possible to change default port of AWS Lightsail Load Balancer. Lightsail instance install Bitnami package which includes Apache httpd service. This httpd service hosts the port 80 by default, and expected to receive traffic from AWS Load Balancer and forwards to your application. Therefore, your application run in Lightsail instance should be configured to be proxied by this httpd service.
If you want AWS Load Balancer to direct traffic to your application, not via httpd service, just stop this httpd service and then start your application using port 80.
I have an Ubuntu 18.04 LTS EC2 Instance with a deployed Django application. The instance also has an elastic IP. The Django application already has a domain name mapped to it in nginx, and it also already has an SSL certificate mapped using certbot.
My questions are:
Do I need to add an HTTPS listener to the load balancer? If yes, do I use the SSL generated by certbot? How?
Do I need to change the IPV4 that is in the nginx config file and DNS record with the new IPV4 of the load balancer created?
Do I need to add an HTTPS listener to the load balancer? If yes, do I use the SSL generated by certbot? How?
Yes, you would need to create a HTTPS listener and you need to use a certificate, you can import the same certificate you're using on nginx or get a new certificate from ACM (free), both will work as long as the subject/SAN are correct.
Do I need to change the IPV4 that is in the nginx config file and DNS record with the new IPV4 of the load balancer created?
ELB provided DNS name , the IP changes so you can't use IP address but after using ELB, you don't need elastic IP on EC2 instance , the communication between ELB and EC2 is on private IP so you can allow 0.0.0.0 in nginx and restrict ELB to make connections to ec2 instance, you will need to point your website to ELB DNS name eventually.
i am having issues setting up an EC2 load balancer, on a instance, that has multiple domains protected by SSL.
Is it possible to make the load balancer pass the HTTPS request as is, and get it decrypted at the server level? If so, how do i set that up?
I have a standard LAMP setup on a EC2.
On your Elastic Load Balancer, configure a TCP listener that listens on port 443 and forwards to port 443 on the instances. This will allow your EC2 instances to perform the SSL termination.
Note that you won't be able to use Sticky Sessions in this configuration.
My app was easy deployed on 3 instances using OpsWorks. I can Access it using instance IP's fine.
My question is: how can I access it using load balancer?
ELB says all 3 instances are InService, but typing public DNS on browser, it loads forever and shows nothing.
Testing ELB public DNS on http://whatsmydns.com it shows IP's that aren't from my instances.
Am I doing something wrong?
I have added Public DNS to my app as hostname.
There are a couple things to check:
Check that your load balancer listeners are configured to listen
and pass traffic to the same port that the instance is listening on
(for example http traffic 80 => http 80, https traffic 443 => https
443)
Check that the security group of the webservers allows
traffic from the loadbalancer. Though if you can access your instances directly via browser, I'm guessing they are open to 0.0.0.0/0 so shouldn't be an issue here?
Check that security group of the load balancer allows access to public on all needed ports (typically 80 and 443)
Check that elb healthcheck is not failing (under elb
instances you can see if the instances are in service or not) If it
says "Out of service" that's the problem. You need to make sure that
healthcheck URL is accessible and returns 200.
The DNS of your load balancer is different from your instances - it returns the IP addresses of the instances that the load balancer is running on, AWS usually has at least 3 servers behind the scenes for that.
I have created a aws elastic load balancer and associated my existing instance with it. The instance is passing the health test. I accessed my instance directly using the ip:port and I am able to view the content. I have linked the same port in the aws configurations. When I try the DNS name in my browser, I do not get any response. What do you think is the issue?
Is your ELB publicly accessible? (You can see this on the ELB settings page.)
Does your ELB has the right security group?
Can you telnet into the ELB on the given port (80?)
Are you using HTTP or HTTPS?
Are you using HTTP health check?
update:
I assume your health check is on port 80, so do you have a listener for that ELB on port 80 to port 80?
Are you doing HTTP port forwarding ( not TCP)?