作者:张富春(ahfuzhang),转载时请注明作者和引用链接,谢谢!
创建一个pod后,再为这个pod创建一个对应的service,便于公开一个地址给外部访问。
有时候需要根据service的vip,再进行下一步的配置。
下面的代码演示如何获取service的vip:
# 最核心的配置
terraform {
required_providers {
kubernetes = {
source = "hashicorp/kubernetes"
version = ">= 2.0.0"
}
}
backend "local" {
}
}
# TKE群集的IP和KEY
provider "kubernetes" {
config_path = "../tencentyun-cls-xxxx-config.yaml"
}
# 这里省略创建容器的代码
# 创建POD对应的service
resource "kubernetes_service" "vm-storage-service" {
metadata {
name = "vm-storage-services"
namespace = "default"
labels = {
"k8s-app" = "vm-storage"
"qcloud-app" = "vm-storage"
}
annotations = {
"description" = "headless service for vm-storage"
"service.kubernetes.io/qcloud-loadbalancer-clusterid" = "cls-xxxxxx"
"service.kubernetes.io/qcloud-loadbalancer-internal-subnetid" = "subnet-xxxxxx"
}
}
spec {
port {
name = "8482-80-tcp"
port = "80"
protocol = "TCP"
target_port = "8482"
}
selector = {
"k8s-app" = "vm-storage" # 这里是绑定的POD
"qcloud-app" = "vm-storage"
}
session_affinity = "None"
type = "LoadBalancer"
external_traffic_policy = "Cluster"
}
}
# 可以在执行完成后输出VIP
output "load_balancer_ip" {
value = "${kubernetes_service.vm-storage-service.status.0.load_balancer.0.ingress.0.ip}" # vm-storage-service 是上面创建的 service 的名字
}
# config-map的建立方法
# 可以把vip写入配置
resource "kubernetes_config_map" "ahfu-vm-storage-vip" {
metadata {
name = "ahfu-vm-storage-vip"
namespace = "default"
}
data = {
"my.yaml" = "${kubernetes_service.vm-storage-service.status.0.load_balancer.0.ingress.0.ip}"
}
}
P.S 能够直接引用output的值呢?代码中死活做不到(只有父module引用子module的情况),希望有研究明白的小伙伴给个例子。
此外,shell中可以这样引用 terraform apply后的output值:
terraform output # apply后,查询所有的output变量
load-balancer-ip-ahfu = "9.xxx.196.21"
terraform output load-balancer-ip-ahfu # 根据名字获取output的值
"9.xxx.196.21"
Have fun!