我正在使用 Terraform 创建 Openstack LoadBalancer,我需要循环遍历实例集合并同时使用索引。
特别是,我有 2 个节点:
output "nodes_1" {
value = [
for vm in openstack_compute_instance_v2.type_1_instance[*] : tomap({
name = "${vm.name}",
private_ip = "${vm.network[0].fixed_ip_v4}"
})
]
}
output "nodes_2" {
value = [
for vm in openstack_compute_instance_v2.type_2_instance[*] : tomap({
name = "${vm.name}",
private_ip = "${vm.network[0].fixed_ip_v4}"
})
]
}
然后我将这些输出连接起来形成一个列表:
cluster_nodes = concat(module.cluster_compute.nodes_1, module.cluster_compute.nodes_2)
最后我需要使用实例“name”和“private_ip”以及对象的索引创建一个 Openstack LoadBalancer:
resource "openstack_lb_listener_v2" "loadbalancer_listener" {
count = local.total_nodes
name = "lb-listener"
loadbalancer_id = openstack_lb_loadbalancer_v2.cluster_loadbalancer.id
protocol_port = sum([local.starting_port, count.index])
}
resource "openstack_lb_pool_v2" "load_balancer_pool" {
for_each = {
for index, vm in local.cluster_nodes :
vm.name => vm
}
name = "pool-${each.value.name}"
listener_id = openstack_lb_listener_v2.loadbalancer_listener[index(local.cluster_nodes, each.value)].id
}
resource "openstack_lb_member_v2" "load_balancer_member" {
for_each = {
for index, vm in local.cluster_nodes :
vm.name => vm
}
name = "lb-member-${each.value.name}"
pool_id = openstack_lb_pool_v2.ssh_load_balancer_pool[index(local.cluster_nodes, each.value)].id
address = each.value.private_ip
}
如何迭代并使用实例值和循环索引?
您可以在这两个资源中使用
count
:
resource "openstack_lb_listener_v2" "loadbalancer_listener" {
count = length(local.cluster_nodes)
name = "lb-listener"
loadbalancer_id = openstack_lb_loadbalancer_v2.cluster_loadbalancer.id
protocol_port = sum([local.starting_port, count.index])
}
resource "openstack_lb_pool_v2" "load_balancer_pool" {
count = length(local.cluster_nodes)
name = "pool-${local.cluster_nodes[count.index].name}"
listener_id = openstack_lb_listener_v2.loadbalancer_listener[count.index].id
}
另一种选择可能是构建包含端口的节点对象映射,并将其与
for_each
一起使用来创建所有相关资源:
locals {
cluster_nodes_map = {
for index, vm in local.cluster_nodes :
vm.name => {
name = vm.name
private_ip = vm.private_ip
port = sum([local.starting_port, count.index])
}
}
}
但是,这仍然使用节点索引来分配端口号,因此如果删除节点,端口将会移动。
您可能想要想出一种不同的方式来分配端口。
我有三个端口,我需要创建三个监听器吗?或者只有一个侦听器和端口数组(例如 [“port1”、“port2”、“port3”] 就足够了?
)