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b3c384fbc0
* Previously: Typhoon provisions clusters with kube-system components
like CoreDNS, kube-proxy, and a chosen CNI provider (among flannel,
Calico, or Cilium) pre-installed. This is convenient since clusters
come with "batteries included". But it also means upgrading these
components is generally done in lock-step, by upgrading to a new
Typhoon / Kubernetes release
* It can be valuable to manage these components with a separate
plan/apply process or through automations and deploy systems. For
example, this allows managing CoreDNS separately from the cluster's
lifecycle.
* These "components" will continue to be pre-installed by default,
but a new `components` variable allows them to be disabled and
managed as "addons", components you apply after cluster creation
and manage on a rolling basis. For some of these, we may provide
Terraform modules to aide in managing these components.
```
module "cluster" {
# defaults
components = {
enable = true
coredns = {
enable = true
}
kube_proxy = {
enable = true
}
# Only the CNI set in var.networking will be installed
flannel = {
enable = true
}
calico = {
enable = true
}
cilium = {
enable = true
}
}
}
```
An earlier variable `install_container_networking = true/false` has
been removed, since it can now be achieved with this more extensible
and general components mechanism by setting the chosen networking
provider enable field to false.
24 lines
914 B
HCL
24 lines
914 B
HCL
# Kubernetes assets (kubeconfig, manifests)
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module "bootstrap" {
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source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a54fe54d9895f5dd51332b79533143f52792090f"
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cluster_name = var.cluster_name
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api_servers = [format("%s.%s", var.cluster_name, var.dns_zone)]
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etcd_servers = formatlist("%s.%s", azurerm_dns_a_record.etcds.*.name, var.dns_zone)
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networking = var.networking
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# only effective with Calico networking
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# we should be able to use 1450 MTU, but in practice, 1410 was needed
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network_encapsulation = "vxlan"
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network_mtu = "1410"
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pod_cidr = var.pod_cidr
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service_cidr = var.service_cidr
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cluster_domain_suffix = var.cluster_domain_suffix
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enable_reporting = var.enable_reporting
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enable_aggregation = var.enable_aggregation
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daemonset_tolerations = var.daemonset_tolerations
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components = var.components
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}
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