Cloud Enterprise Network：通過企業版轉寄路由器實現ECS私網訪問跨地區的OSS服務

控制台

Terraform

您可以使用Terraform搭建本文樣本環境，關於Terraform的安裝和配置，請參考Install Terraform。

下面步驟以Linux主機運行Terraform v1.9.8為例進行介紹，操作前請確保您已經完成Authentication。

第一步：建立資源

1. 為本文的實踐情境建立一個目錄，並進入該目錄。

   mkdir tf-cen-oss && cd tf-cen-oss

2. 建立一個main.tf檔案，用於定義資源資訊。

   touch main.tf

3. 開啟main.tf檔案，複製如下代碼，粘貼到檔案中並儲存。此檔案包含了本文實踐情境中需要用到的資源和對應配置。

   variable "pname" {
     description = "The prefix name for resources"
     type        = string
     default     = "tf-cen-oss"
   }
   variable "region_id_hangzhou" {
     description = "The region id of hangzhou"
     type        = string
     default     = "cn-hangzhou"
   }
   variable "region_id_shanghai" { #
     description = "The region id of shanghai"
     type        = string
     default     = "cn-shanghai"
   }
   variable "az_hangzhou" {
     description = "List of availability zones to use"
     type        = list(string)
     default     = ["cn-hangzhou-j", "cn-hangzhou-k"]
   }
   variable "az_shanghai" {
     description = "List of availability zones to use"
     type        = list(string)
     default     = ["cn-shanghai-m", "cn-shanghai-n"]
   }
   variable "cidr_list" {
     description = "List of VPC CIDR block"
     type        = list(string)
     default     = ["10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]
   }
   # --- provider ---
   provider "alicloud" { # default region hangzhou
     region = var.region_id_hangzhou
   }
   provider "alicloud" {
     alias  = "hangzhou"
     region = var.region_id_hangzhou
   }
   provider "alicloud" {
     alias  = "shanghai"
     region = var.region_id_shanghai
   }
   # ---  oss ---
   resource "random_uuid" "default" {
   }
   resource "alicloud_oss_bucket" "bucket1" {
     provider = alicloud.hangzhou
     bucket   = substr("${var.pname}-${replace(random_uuid.default.result, "-", "")}", 0, 32)
   }
   resource "alicloud_oss_bucket_policy" "default" {
     provider = alicloud.hangzhou
     policy   = jsonencode({ "Version" : "1", "Statement" : [{ "Action" : ["oss:GetObject"], "Effect" : "Allow", "Resource" : ["acs:oss:*:*:${alicloud_oss_bucket.bucket1.bucket}"] }] })
     bucket   = alicloud_oss_bucket.bucket1.bucket
   }
   resource "alicloud_oss_bucket_object" "obj1" {
     provider = alicloud.hangzhou
     bucket   = alicloud_oss_bucket.bucket1.bucket
     key      = "example.txt"                     # Name of the file in the bucket
     content  = "this is example text content \n" # Content of the file
     acl      = "public-read"
   }
   # --- vpc ---
   resource "alicloud_vpc" "vpc1" {
     provider   = alicloud.shanghai
     vpc_name   = "${var.pname}-1"
     cidr_block = "192.168.0.0/16"
   }
   resource "alicloud_vpc" "vpc2" {
     provider   = alicloud.hangzhou
     vpc_name   = "${var.pname}-2"
     cidr_block = "172.16.0.0/16"
   }
   resource "alicloud_vswitch" "vsw1-1" {
     provider     = alicloud.shanghai
     vpc_id       = alicloud_vpc.vpc1.id
     cidr_block   = "192.168.0.0/24"
     zone_id      = var.az_shanghai[0]
     vswitch_name = "${var.pname}-vsw1-1"
   }
   resource "alicloud_vswitch" "vsw1-2" {
     provider     = alicloud.shanghai
     vpc_id       = alicloud_vpc.vpc1.id
     cidr_block   = "192.168.1.0/24"
     zone_id      = var.az_shanghai[1]
     vswitch_name = "${var.pname}-vsw1-2"
   }
   resource "alicloud_vswitch" "vsw2-1" {
     provider     = alicloud.hangzhou
     vpc_id       = alicloud_vpc.vpc2.id
     cidr_block   = "172.16.0.0/24"
     zone_id      = var.az_hangzhou[0]
     vswitch_name = "${var.pname}-vsw2-1"
   }
   resource "alicloud_vswitch" "vsw2-2" {
     provider     = alicloud.hangzhou
     vpc_id       = alicloud_vpc.vpc2.id
     cidr_block   = "172.16.1.0/24"
     zone_id      = var.az_hangzhou[1]
     vswitch_name = "${var.pname}-vsw2-2"
   }
   # --- cen ---
   # cen
   resource "alicloud_cen_instance" "cen1" {
     cen_instance_name = "${var.pname}-cen1"
   }
   # tr
   resource "alicloud_cen_transit_router" "tr1" {
     provider            = alicloud.shanghai
     transit_router_name = "${var.pname}-tr1"
     cen_id              = alicloud_cen_instance.cen1.id
   }
   resource "alicloud_cen_transit_router" "tr2" {
     provider            = alicloud.hangzhou
     transit_router_name = "${var.pname}-tr2"
     cen_id              = alicloud_cen_instance.cen1.id
   }
   data "alicloud_cen_transit_router_route_tables" "tr1" { # get tr sys table
     transit_router_id               = alicloud_cen_transit_router.tr1.transit_router_id
     transit_router_route_table_type = "System"
   }
   data "alicloud_cen_transit_router_route_tables" "tr2" {
     transit_router_id               = alicloud_cen_transit_router.tr2.transit_router_id
     transit_router_route_table_type = "System"
   }
   # tr-peer
   resource "alicloud_cen_transit_router_peer_attachment" "peer" {
     provider                      = alicloud.shanghai
     cen_id                        = alicloud_cen_instance.cen1.id
     transit_router_id             = alicloud_cen_transit_router.tr1.transit_router_id
     peer_transit_router_region_id = var.region_id_hangzhou
     peer_transit_router_id        = alicloud_cen_transit_router.tr2.transit_router_id
     bandwidth_type                = "DataTransfer"
     bandwidth                     = 1
     auto_publish_route_enabled    = true # default is false
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass_peer1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa_peer1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass_peer2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa_peer2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   # attach1  
   resource "alicloud_cen_transit_router_vpc_attachment" "attach1" {
     provider          = alicloud.shanghai
     cen_id            = alicloud_cen_instance.cen1.id
     transit_router_id = alicloud_cen_transit_router.tr1.transit_router_id
     vpc_id            = alicloud_vpc.vpc1.id
     zone_mappings {
       zone_id    = var.az_shanghai[0]
       vswitch_id = alicloud_vswitch.vsw1-1.id
     }
     zone_mappings {
       zone_id    = var.az_shanghai[1]
       vswitch_id = alicloud_vswitch.vsw1-2.id
     }
     transit_router_vpc_attachment_name = "attach1"
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   resource "alicloud_route_entry" "vpc1_to_tr1" {
     provider              = alicloud.shanghai
     count                 = 3
     route_table_id        = alicloud_vpc.vpc1.route_table_id
     destination_cidrblock = var.cidr_list[count.index]
     nexthop_type          = "Attachment"
     nexthop_id            = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   # attach2
   resource "alicloud_cen_transit_router_vpc_attachment" "attach2" {
     provider          = alicloud.hangzhou
     cen_id            = alicloud_cen_instance.cen1.id
     transit_router_id = alicloud_cen_transit_router.tr2.transit_router_id
     vpc_id            = alicloud_vpc.vpc2.id
     zone_mappings {
       zone_id    = var.az_hangzhou[0]
       vswitch_id = alicloud_vswitch.vsw2-1.id
     }
     zone_mappings {
       zone_id    = var.az_hangzhou[1]
       vswitch_id = alicloud_vswitch.vsw2-2.id
     }
     transit_router_vpc_attachment_name = "attach2"
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   resource "alicloud_route_entry" "vpc2_to_tr2" {
     provider              = alicloud.hangzhou
     count                 = 3
     route_table_id        = alicloud_vpc.vpc2.route_table_id
     destination_cidrblock = var.cidr_list[count.index]
     nexthop_type          = "Attachment"
     nexthop_id            = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   # oss_cidr
   variable "oss_cidr" {
     description = "The OSS CIDR block"
     type        = list(string)
     default     = ["100.118.28.0/24", "100.114.102.0/24", "100.98.170.0/24", "100.118.31.0/24"]
   }
   # vpc entry
   resource "alicloud_route_entry" "entry" {
     provider              = alicloud.shanghai
     count                 = 4
     route_table_id        = alicloud_vpc.vpc1.route_table_id
     destination_cidrblock = var.oss_cidr[count.index]
     nexthop_type          = "Attachment"
     nexthop_id            = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   # tr entry 
   resource "alicloud_cen_transit_router_route_entry" "tr2_rt1_entry1" {
     count                                             = 4
     transit_router_route_table_id                     = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_route_entry_destination_cidr_block = var.oss_cidr[count.index]
     transit_router_route_entry_next_hop_type          = "Attachment"
     transit_router_route_entry_next_hop_id            = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   # --- ecs ---
   resource "alicloud_instance" "main" {
     provider             = alicloud.shanghai
     depends_on           = [alicloud_cen_transit_router_route_entry.tr2_rt1_entry1]
     instance_name        = "${var.pname}-ecs"
     instance_type        = "ecs.e-c1m1.large"
     security_groups      = [alicloud_security_group.default.id]
     vswitch_id           = alicloud_vswitch.vsw1-1.id
     image_id             = "aliyun_3_x64_20G_qboot_alibase_20230727.vhd"
     system_disk_category = "cloud_essd"
     private_ip           = "192.168.0.1"
     instance_charge_type = "PostPaid"
     user_data = base64encode(<<-EOT
       #!/bin/bash
       curl  https://${alicloud_oss_bucket.bucket1.bucket}.${alicloud_oss_bucket.bucket1.intranet_endpoint}/${alicloud_oss_bucket_object.obj1.key}  > /root/curl.txt
     EOT
     )
   }
   # sg
   resource "alicloud_security_group" "default" {
     provider = alicloud.shanghai
     name     = var.pname
     vpc_id   = alicloud_vpc.vpc1.id
   }
   resource "alicloud_security_group_rule" "allow_inbound_ssh" {
     provider          = alicloud.shanghai
     type              = "ingress"
     ip_protocol       = "tcp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "22/22"
     priority          = 1
     security_group_id = alicloud_security_group.default.id
     cidr_ip           = "0.0.0.0/0"
   }
   resource "alicloud_security_group_rule" "allow_inbound_icmp" {
     provider          = alicloud.shanghai
     type              = "ingress"
     ip_protocol       = "icmp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "-1/-1"
     priority          = 1
     security_group_id = alicloud_security_group.default.id
     cidr_ip           = "0.0.0.0/0"
   }
   # --- output ---
   output "ecs_login_address" {
     value = "https://ecs-workbench.aliyun.com/?from=EcsConsole&instanceType=ecs&regionId=${var.region_id_shanghai}&instanceId=${alicloud_instance.main.id}"
   }
   output "test_command" {
     value = "curl ${alicloud_oss_bucket.bucket1.bucket}.${alicloud_oss_bucket.bucket1.intranet_endpoint}/${alicloud_oss_bucket_object.obj1.key}"
   }

4. 初始化目錄，完成Terraform的初始化配置。

   terraform init

5. 建立資源。執行後Terraform會先預覽將要建立的資源，確認無誤後，輸入yes正式開始建立。

   terraform apply

第二步：驗證測試

1. 登入ECS執行個體（名稱為tf-cen-oss-ecs）。

   您可以在Terraform的Outputs輸出中，找到對應ECS的登入地址並複製到瀏覽器開啟，登入時注意認證方式選擇臨時SSH密鑰認證。

   Outputs:
   ecs_login_address = "https://ecs-workbench.aliyun.com/?from=EcsConsole&instanceType=ecs&regionId=cn-shanghai&instanceId=i-uf6xxx"
   test_command = "curl xxx"

2. 在Outputs輸出中，複製curl開頭的命令：

   Outputs:
   ecs_login_address = "https://ecs-workbench.aliyun.com/?from=EcsConsole&instanceType=ecs&regionId=cn-shanghai"
   test_command = "curl tf-cen-oss-xxx.oss-cn-hangzhou-internal.aliyuncs.com/example.txt"

3. 在ECS執行個體中執行curl命令：

   curl tf-cen-oss-xxxxxx.oss-cn-hangzhou-internal.aliyuncs.com/example.txt

   [root@iZuf6xxx          ~]# curl tf-cen-oss-2821xxx xxx.oss-cn-hangzhou-internal.aliyuncs.com/example.txt
   this is example text content
   [root@iZuf6xxx          ~]#

   如上所示，如果能擷取到常值內容，則說明訪問成功。

第三步：釋放資源

驗證完畢後，如果您不再使用資源，請執行以下命令釋放資源，防止繼續計費。

terraform destroy --auto-approve