I created an Application Load Balancer in AWS.
How can I assign an Elastic IP address to the application load balancer? I didn't find any IP address in the load balancer description.
An Application Load Balancer cannot be assigned an Elastic IP address (static IP address).
However, a Network Load Balancer can be assigned one Elastic IP address for each Availability Zone it uses.
If you do not wish to use a Network Load Balancer, you can combine the two by putting the Network Load Balancer in front of the Application Load Balancer:
See: Using static IP addresses for Application Load Balancers | Networking & Content Delivery
You can now get global static IPs for your Application Load Balancer directly from the Load Balancer Management Console, either in the creation wizard or in the Integrated services tab. See this blog post.
Another option is to use AWS Global Accelerator:
AWS Global Accelerator
However, it's probably going to be more expensive than using NLB - ALB architecture.
Related
I am creating a backend with ECS and I need to have a static IP, for what I understand from the AWS console all internet-facing load balancers are assigned an IP address by AWS, my question is: Will that IP address change? And if I have 2 Availability Zones, both have different IPs?
For internet-facing load balancers, the IPv4 addresses of the nodes are assigned by AWS.
For internal load balancers, the IPv4 addresses are assigned from the subnet CIDR.
Yes, the IPs change sporadically and you're correct that the IP is different in each Availability Zone.
If you need to have static IPs, you could consider fronting an Application Load Balancer with a Network Load Balancer. This would allow an elastic IP to be set for each AZ that the NLB resides and you should still get the benefits of the ALB.
The downsides would be extra cost and latency. I haven't tried this myself so can't vouch for how well it works.
Source: https://aws.amazon.com/blogs/networking-and-content-delivery/application-load-balancer-type-target-group-for-network-load-balancer/
Will that IP address change? And if I have 2 Availability Zones, both have different IPs?
Yes, for application load balancer (ALB), the IPs are not static. If you want static IP for ALB you can add AWS Global Accelerator to it.
Alternatively, use network LB (NLB), which has static IP addresses.
When creating a Network Load Balancer, there is the option to allocate an Elastic IP address per AZ from one of the EIPs available to you. If you don't allocate an EIP, AWS assigns a Static IP per AZ that can be used by applications as the front-end IP of the load balancer. Note that this only applies to the NLB.
Source: https://aws.amazon.com/elasticloadbalancing/network-load-balancer/
I have created 2 VMs (Webserver) in GCP on one region & TCP internal load balancer configured in the same region and created another vm on another region(southeast asia). Now, I am not able to ping load balancer IP but I am able to ping the webserver IP.
Webserver1---region :us-central ----10.128.0.5 &
Webserver2---region: us-central------10.128.0.6 &
Internal load balancer ip----------10.128.0.13
Test machine---region: southeast asia----10.148.0.5
I understand that by "pinging the load balancer " you mean you want to check the healt of the load balancer.However pinging a load balancer is not possible as it is a virtual part of a network and it is not a seperate device.however u can check the health of the load balancer using the instrucctions from the following docs.
https://cloud.google.com/load-balancing/docs/internal/setting-up-internal
hope that was helpful.
GCP internal load balancer by design handles traffic within the same region. As your test machine is in a different region(Southeast-asia), you cannot ping the internal load balancer which is present in the US-CENTRAL1 region.
Internal HTTP(S) Load Balancing distributes HTTP and HTTPS traffic to backends hosted on Compute Engine and Google Kubernetes Engine (GKE). The load balancer is accessible only in the chosen region of your Virtual Private Cloud (VPC) network on an internal IP address.
Kindly refer to the below link for:
Internal TCP/UDP Load Balancing overview :
https://cloud.google.com/load-balancing/docs/l7-internal
Troubleshooting Internal TCP/UDP Load Balancing
https://cloud.google.com/load-balancing/docs/internal/troubleshooting-ilb
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.
I am learning about AWS elastic and classic load balancer. I understand what a load balancer does, but can someone please explain what the difference is between them?
I'm studying for a AWS certificate and I need to be able to explain the difference. Thanks in advance.
As others have said, you have three types of Elastic Load Balancer (ELB).
You can select the appropriate load balancer based on your application needs. If you need flexible application management, we recommend that you use an Application Load Balancer. If extreme performance and static IP is needed for your application, we recommend that you use a Network Load Balancer. If you have an existing application that was built within the EC2-Classic network, then you should use a Classic Load Balancer.
That's from the AWS ELB page, see a feature comparison and description of each service here: https://aws.amazon.com/elasticloadbalancing/features/
The AWS api and documentation is very confusing about load balancers.
First release of LoadBalancer (TCP load balancer only) was called ELB for Elastic LoadBalancer.
Second and actual release of load balancers are called ALB for Application Load Balancer. They deal with TCP/HTTP/HTTPS, filtering rules, etc. Be carefull, in the API ALB are called LoadBalancer_v2 !!!
In 2022 we have Gateway Load Balancer in addition.
So there are 4 Balancers:
Application Load Balancer - HTTP, HTTPS, gRPC (for IP, Instance, Lambda),
Network Load Balancer - TCP, UDP, TLS (for IP, Instance, App.. Load Balancer),
Gateway Load Balancer - IP (for IP, Instance),
Classic Load Balancer - SSL/TLS, HTTP, HTTPS (for classic EC2-networks).
https://aws.amazon.com/elasticloadbalancing/features/
I have a load balancer created in my VPC with two subnets. Now I want to open a firewall rule from within my company intranet. I have no control over this firewall. But to open a rule on the firewall - the firewall team is accepting only ip addresses and not the DNS names.
But since the IP address of the load balancer keeps changing I can't give it to the firewall team. That's where I am stuck.
How can I open a firewall rule to an AWS load balancer from within my intranet?
You are correct that an Application Load Balancer does not provide static IP addresses.
You might be able to change to a Network Load Balancer:
Elastic Load Balancing creates a network interface for each Availability Zone you enable. Each load balancer node in the Availability Zone uses this network interface to get a static IP address. When you create an Internet-facing load balancer, you can optionally associate one Elastic IP address per subnet.
It is also possible to put a Network Load Balancer in front of an Application Load Balancer to gain the benefits of both.
See: Using static IP addresses for Application Load Balancers | AWS Networking & Content Delivery Blog