本文介绍如何在本地进行基本的 Terraform 开发与调试工作。
步骤1:安装 Terraform
步骤2:Provider 拉取
1. 前往 terraform-provider-tencentcloud,将 provider 代码 fork 到个人仓库。
2. 依次执行以下命令,本地拉取并设置上游远程仓库。
$ git clone https://github.com/{您的用户名}/terraform-provider-tencentcloud # 这里的代码路径为上述fork后的个人代码仓库,根据实际情况修改
$ cd terraform-provider-tencentcloud
$ git remote add upstream https://github.com/tencentcloudstack/terraform-provider-tencentcloud
拉取成功后,可查看代码结构如下:
.├── .githooks/├── .github/├── examples/ # 示例代码,原则上请确保产出的代码用户可以直接复制粘贴使用├── gendoc/ # 文档生成工具├── scripts/├── tencentcloud/ # 产品逻辑├── vendor/ # 本地依赖缓存├── website/ # 生成的文档目录├── .gitignore├── .go-version├── .golangci.yml├── .goreleaser.yml├── .travis.yml├── AUTHORS├── CHANGELOG.md├── GNUmakefile├── LICENSE├── README.md├── go.mod├── go.sum├── main.go├── staticcheck.conf└── tools.go
步骤3:本地调试
1. 在项目根目录执行以下命令,构建二进制文件
terraform-provider-tencentcloud
。go build
2. 创建
dev.tfrc
文件,并写入以下内容,设置 tencentcloudstack/tencentcloud
指向二进制文件的位置。provider_installation {# Use /home/developer/tmp/terraform-null as an overridden package directory# for the hashicorp/null provider. This disables the version and checksum# verifications for this provider and forces Terraform to look for the# null provider plugin in the given directory.dev_overrides {"tencentcloudstack/tencentcloud" = "path/to/your/provider/terraform-provider-tencentcloud"}}
3. 设置以下环境变量。
设置
TF_CLI_CONFIG_FILE
环境变量,指向 dev.tfrc
所在位置。$ export TF_CLI_CONFIG_FILE=/Users/you/dev.tfrc
设置
TF_LOG
环境变量,以打开日志。$ export TF_LOG=TRACE
设置个人的腾讯云凭证。可前往 API密钥管理 页面获取。
$ export TENCENTCLOUD_SECRET_ID=xxx$ export TENCENTCLOUD_SECRET_KEY=xxx
4. 至此,provider 已完成本地替换,您可自行编写
.tf
文件,执行 terraform plan/apply/destroy
等命令进行调试。步骤4:单元测试
说明:
强烈建议您自行编写单元测试用例进行测试。您可在
tencentcloud/
下查看众多 *_test.go
单元测试用例。如需成为 Terraform 官方认证的 provider,则必须具备单元测试用例。
1. 以 NAT 网关为例,代码如下:
package tencentcloudimport ("encoding/json""fmt""log""testing""github.com/hashicorp/terraform/helper/resource""github.com/hashicorp/terraform/terraform""github.com/zqfan/tencentcloud-sdk-go/common"vpc "github.com/zqfan/tencentcloud-sdk-go/services/vpc/unversioned")func TestAccTencentCloudNatGateway_basic(t *testing.T) {resource.Test(t, resource.TestCase{PreCheck: func() { testAccPreCheck(t) },Providers: testAccProviders,// 配置 资源销毁结果检查函数CheckDestroy: testAccCheckNatGatewayDestroy,// 配置 测试步骤Steps: []resource.TestStep{{// 配置 配置内容Config: testAccNatGatewayConfig,// 配置 验证函数Check: resource.ComposeTestCheckFunc(// 验证资源IDtestAccCheckTencentCloudDataSourceID("tencentcloud_nat_gateway.my_nat"),// 验证资源属性,能匹配到,肯定就是创建成功了resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "name", "terraform_test"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "max_concurrent", "3000000"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "bandwidth", "500"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "assigned_eip_set.#", "2"),),},{// 配置 配置内容Config: testAccNatGatewayConfigUpdate,Check: resource.ComposeTestCheckFunc(testAccCheckTencentCloudDataSourceID("tencentcloud_nat_gateway.my_nat"),// 验证修改后的属性值,如果能匹配到,肯定就是修改成功了resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "name", "new_name"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "max_concurrent", "10000000"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "bandwidth", "1000"),resource.TestCheckResourceAttr("tencentcloud_nat_gateway.my_nat", "assigned_eip_set.#", "2"),),},},})}// testAccProviders 在测试前会根据 Config 建立测试资源,测试结束后又会全部销毁// 这个函数就是检查资源是否销毁用的,代码逻辑比较好理解,就是根据ID查询资源是否存在func testAccCheckNatGatewayDestroy(s *terraform.State) error {conn := testAccProvider.Meta().(*TencentCloudClient).vpcConn// 这用到了 s.RootModule().Resources 数组// 这个数组的属性反应的就是资源状态文件 terraform.tfstatefor _, rs := range s.RootModule().Resources {if rs.Type != "tencentcloud_nat_gateway" {continue}descReq := vpc.NewDescribeNatGatewayRequest()descReq.NatId = common.StringPtr(rs.Primary.ID)descResp, err := conn.DescribeNatGateway(descReq)b, _ := json.Marshal(descResp)log.Printf("[DEBUG] conn.DescribeNatGateway response: %s", b)if _, ok := err.(*common.APIError); ok {return fmt.Errorf("conn.DescribeNatGateway error: %v", err)} else if *descResp.TotalCount != 0 {return fmt.Errorf("NAT Gateway still exists.")}}return nil}// 基本用法配置文件,与debug的tf文件一致const testAccNatGatewayConfig = `resource "tencentcloud_vpc" "main" {name = "terraform test"cidr_block = "10.6.0.0/16"}resource "tencentcloud_eip" "eip_dev_dnat" {name = "terraform_test"}resource "tencentcloud_eip" "eip_test_dnat" {name = "terraform_test"}resource "tencentcloud_nat_gateway" "my_nat" {vpc_id = "${tencentcloud_vpc.main.id}"name = "terraform_test"max_concurrent = 3000000bandwidth = 500assigned_eip_set = ["${tencentcloud_eip.eip_dev_dnat.public_ip}","${tencentcloud_eip.eip_test_dnat.public_ip}",]}`// 修改用法配置文件,与debug修改后的tf文件一致const testAccNatGatewayConfigUpdate = `resource "tencentcloud_vpc" "main" {name = "terraform test"cidr_block = "10.6.0.0/16"}resource "tencentcloud_eip" "eip_dev_dnat" {name = "terraform_test"}resource "tencentcloud_eip" "eip_test_dnat" {name = "terraform_test"}resource "tencentcloud_eip" "new_eip" {name = "terraform_test"}resource "tencentcloud_nat_gateway" "my_nat" {vpc_id = "${tencentcloud_vpc.main.id}"name = "new_name"max_concurrent = 10000000bandwidth = 1000assigned_eip_set = ["${tencentcloud_eip.eip_dev_dnat.public_ip}","${tencentcloud_eip.new_eip.public_ip}",]}`
2. 执行
TestAccTencentCloudNatGateway_basic
函数,进行单元测试。$ export TF_ACC=true$ cd tencentcloud$ go test -i; go test -test.run TestAccTencentCloudNatGateway_basic -v
通过该示例可得知官方的 testAccProviders 除自动编译外,测试流程也更加标准化,全面覆盖 Create/Read/Update/Delete。您可针对同一个资源管理程序,编写更多复杂的场景,并将其加入 Steps 或分为多个测试用例,使得测试更加全面。