On Azure I placed private AKS cluster with private LoadBalancer (LB).
From any pod (I have only deployment and service with private IP using private LB, no ingress etc) I can't access any site from public internet, and I need to do it avoiding Azure Firewall that is too expensive
Which resources can help me to enable outbound access without making private cluster public?
Related
I am not able to understand the difference between service endpoints and private endpoints clearly.
Need help preferably with an example.
You might have seen this in the Private Link FAQ:
Private Endpoints grant network access to specific resources behind a given service providing granular segmentation. Traffic can reach the service resource from on premises without using public endpoints.
A Service Endpoint remains a publicly routable IP address. A Private Endpoint is a private IP in the address space of the virtual network where the private endpoint is configured.
For simplicity, let's take the view of a VM in a VNET connecting to a storage account in the same subscription and same Azure region. There are three ways to connect.
Default
By default all traffic goes against the public endpoint of the storage account. Source IP of the traffic is the Public IP of the VM.
Service Endpoints
Traffic is still directed against the public endpoint of the storage account but the source IP has changed to the private IP of the VM. In fact, the traffic is also using the VNET and Subnet as source in the network dataframe.
Private Endpoints
The PaaS service now gets a virtual network interface inside the subnet and traffic from the VM to the storage account is now directed against the private IP address.
By far the best collection of useful information around Private Link that I have seen on the web is in this repository: https://github.com/dmauser/PrivateLink
You can also find some examples here: https://jeffbrown.tech/azure-private-service-endpoint/
On Azure I have 2 vnet's (with peerings):
On first I have public LoadBalancer
On second - private AKS cluster with deployments and Nginx Ingress installed. From first vnet Ingress is accessible by private IP and private DNS name
I need to configure LoadBalancer to access Ingress from Internet. Tried to configure LoadBalancer inbound/NAT rules (Public IP -> Ingress IP inside second vnet), but it's still not visible
Is it possible when resources are in different vnet's?
Can it be configured only on LoadBalancer? Or I need to have additional route table/privatelinks between vnet's?
I don't know how to implement this problem:
I have this private AKS cluster with 4 microservices (.net5) and a frontend. These 4 microservices talk to each other via HTTP requests using their public IP addresses (not good because I want them to have only a private endpoint, like microservicename.api.my-namespace.svc.cluster-domain.example).
Frontend (that has a public DNS and IP) should then be able to request a main API in that private endpoint.
I need to implement a solution to this, and also I feel like that communicating between microservices via HTTP requests on a certain endpoint is not a good design pattern, so I wanted some suggestions on this aspect also.
Many thanks
• You can use the Azure Private Link Service in this case to establish communication between the private AKS cluster and the frontend through the private endpoint that will be exposed in the subnet of the private AKS cluster.
• The Private Link service is supported on Standard Azure Load Balancer only. Basic Azure Load Balancer isn't supported. To use a custom DNS server, add the Azure DNS IP 168.63.129.16 as the upstream DNS server in the custom DNS server.
• You can create a private AKS cluster consisting of the four microservices using the below command with a private DNS zone or a custom private DNS zone: -
‘az aks create -n -g --load-balancer-sku standard --enable-private-cluster --enable-managed-identity --assign-identity --private-dns-zone [system|none]’ – with a private DNS zone (system for default value & none for public DNS zone)
‘az aks create -n -g --load-balancer-sku standard --enable-private-cluster --enable-managed-identity --assign-identity --private-dns-zone --fqdn-subdomain ’
• If the Private DNS Zone is in a different subscription than the AKS cluster, you need to register Microsoft.ContainerServices in both the subscriptions. Additionally, you will need a user assigned identity or service principal with at least the private dns zone contributor and vnet contributor roles. "fqdn-subdomain" can be utilized with "CUSTOM_PRIVATE_DNS_ZONE_RESOURCE_ID" only to provide subdomain capabilities to privatelink..azmk8s.io
• Next, you would need to use a VM that has access to the AKS cluster's Azure Virtual Network (VNet). There are several options for establishing network connectivity to the private cluster such as create a VM in the same Azure Virtual Network (VNet) as the AKS cluster or use a VM in a separate network and set up Virtual network peering. Thus, you can create a private link with a private endpoint for the four microservices in the private AKS cluster and provide connection to the frontend API.
Please refer the below link for more details: -
https://learn.microsoft.com/en-us/azure/aks/private-clusters
I'm following these tutorials to enable a site-to-site connection on Windows Azure. I'm trying to connect a VPN to a virtual machine so I can access it via private IP.
https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-multi-site-to-site-resource-manager-portal#part3
https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-site-to-site-classic-portal
While creating the connection for the device to the virtual private gateway, I am getting the following error:
Failed to update the configuration for connection
...Error:UseLocalAzureIpAddress cannot be set...virtual network
gateway...does note have 'EnablePrivateIpAddress' flag set.
Also, I have tried to enable it under Virtual Private Gateway -> Configuration but there is no option for private IP.
Does anyone know how I can enable this either through the Azure portal or powershell?
As the hint on the right of the Use Azure Private IP Address tab. It's only supported on AZ SKUs. You have to deploy the Zone-redundant VPN gateways to enable this feature.
Also, VpnGw1AZ, VpnGw2AZ, VpnGw3AZ, VpnGw4AZ, and VpnGw5AZ are the zone resilient versions of VpnGw1, VpnGw2, VpnGw3, VpnGw4, and VpnGw5.
Please note that
Zone-redundant gateways and zonal gateways both rely on the Azure
public IP resource Standard SKU. The configuration of the Azure public
IP resource determines whether the gateway that you deploy is
zone-redundant, or zonal. If you create a public IP resource with a
Basic SKU, the gateway will not have any zone redundancy, and the
gateway resources will be regional.
Reference: https://learn.microsoft.com/en-us/azure/vpn-gateway/about-zone-redundant-vnet-gateways
I want to provision a VM which has no public ip so it can only be connected from other VM who have public ip. Now i can create a VM without public ip but then it does not have a internet access.
Now is there a way on Azure like on AWS where i can provision a NAT gateway or NAT instance on public subnet and let the private instances have internet connection
I also tried using NAT Gateway on Azure but it doesn't work unless i assign public ip to VM which is not what i want
I have two subnets lets say public_subnet & private_subnet , now i can ssh to my private vm from a jump but the thing is when i login to my private vm i cant install any package or even not able to ping or curl to any website. Both subnets were created using terraform so the configuration of subnets are all same there is no change is subnet configuration
Azure VMs have internet access by default, you dont have to do anything for them to have outbound access. It just works. Even without the public IP
There's two possibilities:
First one, under the same Vnet, you provision you VM without a public ip adress and then access it using Azure Bastion. You can find more details here.
Second one, is to provision two or more VMs in the same subnet one with public IP and the other without a public IP. and then access the one with private IP from the one with public IP.