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Change flannel port from 8472 to 4789

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* Change flannel port from the kernel default 8472 to the
IANA assigned VXLAN port 4789
* Update firewall rules or security groups for VXLAN
* Why now? Calico now offers its own VXLAN backend so
standardizing on the IANA port will simplify config
* https://github.com/coreos/flannel/blob/master/Documentation/backends.md#vxlan
This commit is contained in:
Dalton Hubble
2019-05-06 21:56:38 -07:00
parent 2d19ab8457
commit af18296bc5
16 changed files with 97 additions and 76 deletions
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2
azure/container-linux/kubernetes/bootkube.tf
View File

@ -1,6 +1,6 @@
# Self-hosted Kubernetes assets (kubeconfig, manifests)
module "bootkube" {
source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=b96d641f6d42cf5d9bf3ac36f557aa21cc157680"
source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=fc7a6fb20abe41ccd40f3449ee8ee7bba7bd9932"
cluster_name = "${var.cluster_name}"
api_servers = ["${format("%s.%s", var.cluster_name, var.dns_zone)}"]

12
azure/container-linux/kubernetes/security.tf
View File

@ -68,17 +68,17 @@ resource "azurerm_network_security_rule" "controller-apiserver" {
destination_address_prefix = "${azurerm_subnet.controller.address_prefix}"
}
resource "azurerm_network_security_rule" "controller-flannel" {
resource "azurerm_network_security_rule" "controller-vxlan" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "allow-flannel"
name = "allow-vxlan"
network_security_group_name = "${azurerm_network_security_group.controller.name}"
priority = "2020"
access = "Allow"
direction = "Inbound"
protocol = "Udp"
source_port_range = "*"
destination_port_range = "8472"
destination_port_range = "4789"
source_address_prefixes = ["${azurerm_subnet.controller.address_prefix}", "${azurerm_subnet.worker.address_prefix}"]
destination_address_prefix = "${azurerm_subnet.controller.address_prefix}"
}
@ -204,17 +204,17 @@ resource "azurerm_network_security_rule" "worker-https" {
destination_address_prefix = "${azurerm_subnet.worker.address_prefix}"
}
resource "azurerm_network_security_rule" "worker-flannel" {
resource "azurerm_network_security_rule" "worker-vxlan" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "allow-flannel"
name = "allow-vxlan"
network_security_group_name = "${azurerm_network_security_group.worker.name}"
priority = "2015"
access = "Allow"
direction = "Inbound"
protocol = "Udp"
source_port_range = "*"
destination_port_range = "8472"
destination_port_range = "4789"
source_address_prefixes = ["${azurerm_subnet.controller.address_prefix}", "${azurerm_subnet.worker.address_prefix}"]
destination_address_prefix = "${azurerm_subnet.worker.address_prefix}"
}