I have created one internal load balancer and application deployed on that internal network. For testing purpose I have created one instance in same VPC called "instance1". I am able to curl to load balancer from this instance1 but I am not able to ping this internal load balancer from outside of VPC.
My future plan is to deploy UI on external load balancer and call internal load balancer from there.
Query is, as I am not able to connect to internal load balancer from outside how my UI instance will be able to do the same.
Internal Loadbalancers are for internal connections only. For reaching out your load balancer from a different network, you can use VPC Peering (connect two GCP network) or use Interconnect products (VPN or Direct connection) for secured/dedicated intranet access.
If your application is intended to be accessible from the outside world (the internet), you can use an external load balancer (Layer 4 or Layer 7 if your application is HTTP based).
Related
I have a VPC with a public and a private subnet. I want my auto scaling applications to live in the private subnet, so I'll need to access them via a load balancer in the public subnet. These applications also need to talk to each other internally.
I'm trying to use Elastic Beanstalk to create an internal network load balancer in my private subnet, which is pointing to my applications in the private subnet. Then I have manually created a public application load balancer in my public subnet. But it seems that my application load balancer is struggling to route to my network load balancer.
Is this a reasonable set up? I've seen lots of examples of a public facing network load balancing which is pointing to an internal application load balancer, but not the other way around. I've been able to get that to work but I can't redirect http to https at the network load balancer which is why I'd prefer it the other way around. If nothing else I'm thinking to have CloudFront in front of a public, network load balancer in front of a private network load balancer, and then handle the TLS and redirect from CloudFront instead.
Thanks
Is this a reasonable set up? I've seen lots of examples of a public facing network load balancing which is pointing to an internal application load balancer, but not the other way around.
Unfortunately no, that is not a reasonable setup, because it is not supported by AWS. An application load balancer can not forward traffic to another load balancer.
It's unclear from your description why you need a load balancer pointing at another load balancer at all. Your backend service can belong to multiple target groups, so multiple load balancers can forward traffic directly to your service. In other words, the public load balancer can forward traffic directly to your private services, without going through the private 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
I would like to know if there is any difference between AWS's internal load balance and external load balancer besides the fact that only clients on the VPC can communicate with the internal load balancer.
Is there any perfomance difference like one of them answering faster or one of them being cheaper?
The only difference I could think of would be the internal load balancer making the data transfer cheaper.
An internal load balancer is assigned to a private subnet and does not have a public IP. It cannot be accessed by a client not on the VPC (even if you create a Route53 record pointing to it). If you want clients to be able to connect to your load balancer who are not on the VPC, you need to set up an internet-facing load balancer.
An internal load balancer routes traffic to your EC2 instances in private subnets. The clients must have access to the private subnets.
I am trying to setup a internal load balancer on GCP cloud , and the problem is, when i try to access the same via another instance which falls under same VPC I am facing "Connection refused" error. Firewall rules has been checked as well as cross checked that load balancer and standalone instance which is trying to access are in same subnet.
Internal load balancers are regional, i.e an instance in us-east cannot communicate with an internal load balancer in us-central, even within the same VPC.
You should make sure that your source VM's subnet is in the same region as your ILB's
As a potential workaround you could use this
We are in process of setting up an infrastructure where we have several services hosted and we have separate Internal Load Balancer for each service.
If we have global Load balancer in front of internal load balancer. Can someone please help and tell me how the various services can communicate with each other. Would it be via global HTTP LB ? Is this the right approach. Would really appreciate your help.
I expect your "global load balancer" is set up with a global external IP and so reachable by external clients via the internet.
If you use an internal load balancer to further distribute the load to instances within your VPC inside the GCP project, there is no need to call the external IP to communicate with other services inside your GCP project.
You can directly execute calls against the IP address of the internal load balancer.
Note you can either let GCP allocate any free IP address within your VPC, or you can select the IP address within the address range of the selected VPC.
See also the following documentation about internal load balancers:
https://cloud.google.com/compute/docs/load-balancing/internal/
You can't reuse the same Instance Group as backend for HTTP(S) Load Balancing and for an Internal Load Balancer.
What you can do is use HTTP(s) Load Balancing for both internal and external clients.
Otherwise, you can run a HTTP proxy service in the HTTP(s) Load Balancing backends, and forward the requests to the internal load balanced IP.