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48d4973957
* Define a dual-stack virtual network with both IPv4 and IPv6 private
address space. Change `host_cidr` variable (string) to a `network_cidr`
variable (object) with "ipv4" and "ipv6" fields that list CIDR strings.
* Define dual-stack controller and worker subnets. Disable Azure
default outbound access (a deprecated fallback mechanism)
* Enable dual-stack load balancing to Kubernetes Ingress by adding
a public IPv6 frontend IP and LB rule to the load balancer.
* Enable worker outbound IPv6 connectivity through load balancer
SNAT by adding an IPv6 frontend IP and outbound rule
* Configure controller nodes with a public IPv6 address to provide
direct outbound IPv6 connectivity
* Add an IPv6 worker backend pool. Azure requires separate IPv4 and
IPv6 backend pools, though the health probe can be shared
* Extend network security group rules for IPv6 source/destinations
Checklist:
Access to controller and worker nodes via IPv6 addresses:
* SSH access to controller nodes via public IPv6 address
* SSH access to worker nodes via (private) IPv6 address (via
controller)
Outbound IPv6 connectivity from controller and worker nodes:
```
nc -6 -zv ipv6.google.com 80
Ncat: Version 7.94 ( https://nmap.org/ncat )
Ncat: Connected to [2607:f8b0:4001:c16::66]:80.
Ncat: 0 bytes sent, 0 bytes received in 0.02 seconds.
```
Serve Ingress traffic via IPv4 or IPv6 just requires setting
up A and AAAA records and running the ingress controller with
`hostNetwork: true` since, hostPort only forwards IPv4 traffic
27 lines
942 B
HCL
27 lines
942 B
HCL
module "workers" {
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source = "./workers"
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name = var.cluster_name
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# Azure
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resource_group_name = azurerm_resource_group.cluster.name
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region = azurerm_resource_group.cluster.location
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subnet_id = azurerm_subnet.worker.id
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security_group_id = azurerm_network_security_group.worker.id
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backend_address_pool_ids = local.backend_address_pool_ids
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worker_count = var.worker_count
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vm_type = var.worker_type
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os_image = var.os_image
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priority = var.worker_priority
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# configuration
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kubeconfig = module.bootstrap.kubeconfig-kubelet
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ssh_authorized_key = var.ssh_authorized_key
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azure_authorized_key = var.azure_authorized_key
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service_cidr = var.service_cidr
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cluster_domain_suffix = var.cluster_domain_suffix
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snippets = var.worker_snippets
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node_labels = var.worker_node_labels
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arch = var.arch
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}
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