mirror of
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e9c8520359
* Accept experimental CNI `networking` mode "cilium"
* Run Cilium v1.8.0-rc4 with overlay vxlan tunnels and a
minimal set of features. We're interested in:
* IPAM: Divide pod_cidr into /24 subnets per node
* CNI networking pod-to-pod, pod-to-external
* BPF masquerade
* NetworkPolicy as defined by Kubernetes (no L7 Policy)
* Continue using kube-proxy with Cilium probe mode
* Firewall changes:
* Require UDP 8472 for vxlan (Linux kernel default) between nodes
* Optional ICMP echo(8) between nodes for host reachability
(health)
* Optional TCP 4240 between nodes for endpoint reachability (health)
Known Issues:
* Containers with `hostPort` don't listen on all host addresses,
these workloads must use `hostNetwork` for now
https://github.com/cilium/cilium/issues/12116
* Erroneous warning on Fedora CoreOS
https://github.com/cilium/cilium/issues/10256
Note: This is experimental. It is not listed in docs and may be
changed or removed without a deprecation notice
Related:
* https://github.com/poseidon/terraform-render-bootstrap/pull/192
* https://github.com/cilium/cilium/issues/12217
429 lines
17 KiB
HCL
429 lines
17 KiB
HCL
# Controller security group
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resource "azurerm_network_security_group" "controller" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "${var.cluster_name}-controller"
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location = azurerm_resource_group.cluster.location
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}
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resource "azurerm_network_security_rule" "controller-icmp" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-icmp"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "1995"
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access = "Allow"
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direction = "Inbound"
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protocol = "Icmp"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-ssh" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-ssh"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2000"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "22"
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source_address_prefix = "*"
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-etcd" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-etcd"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2005"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "2379-2380"
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source_address_prefix = azurerm_subnet.controller.address_prefix
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Allow Prometheus to scrape etcd metrics
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resource "azurerm_network_security_rule" "controller-etcd-metrics" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-etcd-metrics"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2010"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "2381"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Allow Prometheus to scrape kube-proxy metrics
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resource "azurerm_network_security_rule" "controller-kube-proxy" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-kube-proxy-metrics"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2011"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "10249"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Allow Prometheus to scrape kube-scheduler and kube-controller-manager metrics
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resource "azurerm_network_security_rule" "controller-kube-metrics" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-kube-metrics"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2012"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "10251-10252"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-apiserver" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-apiserver"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2015"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "6443"
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source_address_prefix = "*"
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-cilium-health" {
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resource_group_name = azurerm_resource_group.cluster.name
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count = var.networking == "cilium" ? 1 : 0
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name = "allow-cilium-health"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2019"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "4240"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-vxlan" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-vxlan"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2020"
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access = "Allow"
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direction = "Inbound"
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protocol = "Udp"
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source_port_range = "*"
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destination_port_range = "4789"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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resource "azurerm_network_security_rule" "controller-linux-vxlan" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-linux-vxlan"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2021"
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access = "Allow"
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direction = "Inbound"
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protocol = "Udp"
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source_port_range = "*"
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destination_port_range = "8472"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Allow Prometheus to scrape node-exporter daemonset
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resource "azurerm_network_security_rule" "controller-node-exporter" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-node-exporter"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2025"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "9100"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Allow apiserver to access kubelet's for exec, log, port-forward
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resource "azurerm_network_security_rule" "controller-kubelet" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-kubelet"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "2030"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "10250"
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# allow Prometheus to scrape kubelet metrics too
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.controller.address_prefix
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}
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# Override Azure AllowVNetInBound and AllowAzureLoadBalancerInBound
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# https://docs.microsoft.com/en-us/azure/virtual-network/security-overview#default-security-rules
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resource "azurerm_network_security_rule" "controller-allow-loadblancer" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-loadbalancer"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "3000"
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access = "Allow"
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direction = "Inbound"
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protocol = "*"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefix = "AzureLoadBalancer"
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destination_address_prefix = "*"
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}
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resource "azurerm_network_security_rule" "controller-deny-all" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "deny-all"
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network_security_group_name = azurerm_network_security_group.controller.name
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priority = "3005"
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access = "Deny"
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direction = "Inbound"
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protocol = "*"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefix = "*"
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destination_address_prefix = "*"
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}
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# Worker security group
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resource "azurerm_network_security_group" "worker" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "${var.cluster_name}-worker"
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location = azurerm_resource_group.cluster.location
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}
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resource "azurerm_network_security_rule" "worker-icmp" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-icmp"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "1995"
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access = "Allow"
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direction = "Inbound"
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protocol = "Icmp"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-ssh" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-ssh"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2000"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "22"
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source_address_prefix = azurerm_subnet.controller.address_prefix
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-http" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-http"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2005"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "80"
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source_address_prefix = "*"
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-https" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-https"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2010"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "443"
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source_address_prefix = "*"
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-cilium-health" {
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resource_group_name = azurerm_resource_group.cluster.name
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count = var.networking == "cilium" ? 1 : 0
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name = "allow-cilium-health"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2014"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "4240"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-vxlan" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-vxlan"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2015"
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access = "Allow"
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direction = "Inbound"
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protocol = "Udp"
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source_port_range = "*"
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destination_port_range = "4789"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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resource "azurerm_network_security_rule" "worker-linux-vxlan" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-linux-vxlan"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2016"
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access = "Allow"
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direction = "Inbound"
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protocol = "Udp"
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source_port_range = "*"
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destination_port_range = "8472"
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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# Allow Prometheus to scrape node-exporter daemonset
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resource "azurerm_network_security_rule" "worker-node-exporter" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-node-exporter"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2020"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "9100"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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# Allow Prometheus to scrape kube-proxy
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resource "azurerm_network_security_rule" "worker-kube-proxy" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-kube-proxy"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2024"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "10249"
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source_address_prefix = azurerm_subnet.worker.address_prefix
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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# Allow apiserver to access kubelet's for exec, log, port-forward
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resource "azurerm_network_security_rule" "worker-kubelet" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-kubelet"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "2025"
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access = "Allow"
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direction = "Inbound"
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protocol = "Tcp"
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source_port_range = "*"
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destination_port_range = "10250"
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# allow Prometheus to scrape kubelet metrics too
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source_address_prefixes = [azurerm_subnet.controller.address_prefix, azurerm_subnet.worker.address_prefix]
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destination_address_prefix = azurerm_subnet.worker.address_prefix
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}
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# Override Azure AllowVNetInBound and AllowAzureLoadBalancerInBound
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# https://docs.microsoft.com/en-us/azure/virtual-network/security-overview#default-security-rules
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resource "azurerm_network_security_rule" "worker-allow-loadblancer" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "allow-loadbalancer"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "3000"
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access = "Allow"
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direction = "Inbound"
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protocol = "*"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefix = "AzureLoadBalancer"
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destination_address_prefix = "*"
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}
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resource "azurerm_network_security_rule" "worker-deny-all" {
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resource_group_name = azurerm_resource_group.cluster.name
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name = "deny-all"
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network_security_group_name = azurerm_network_security_group.worker.name
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priority = "3005"
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access = "Deny"
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direction = "Inbound"
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protocol = "*"
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source_port_range = "*"
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destination_port_range = "*"
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source_address_prefix = "*"
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destination_address_prefix = "*"
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}
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