使用资源配置工具terraform在aws上构建基础架构

╰+攻爆jí腚メ 2022-10-01 09:45 157阅读 0赞

虽然可以直接在aws后台手动创建服务器等资源，但是这个创建过程重复过程成本比较高，所以可以把这个服务器资源使用terraform这个工具来管理，就可以把服务器资源的管理写到文件中了，服务器资源的管理可以通过修改文件实现

terraform支持aws，aliyun，ucloud等服务商，完整的服务商列表参考：[www.terraform.io/docs/provid…][www.terraform.io_docs_provid]

terraform是一个命令行工具，下载地址：[www.terraform.io/downloads.h…][www.terraform.io_downloads.h]

## 生成api访问密钥 ##

到这个页面https://console.amazonaws.cn/iam/home?\#/users 添加新用户，访问类型设置成编程访问

将用户添加到Administrators组，这样这个用户就有访问aws资源的权限了

点击下一步，操作效果如下这里记录下这里生成的访问密钥ID和私有访问密钥，terraform通过这个密钥认证

## 配置访问密钥 ##

把上面获取到的aws写入terraform配置文件，比如config.tf

provider "aws" {
      access_key = "aws的accesskey"
      secret_key = "aws的secretkey"
      region     = "aws地区代码"
    }
    复制代码

aws代码列表参考：[docs.aws.amazon.com/zh\_cn/gener…][docs.aws.amazon.com_zh_cn_gener]

然后使用这个`terraform init`命令下载aws插件，操作效果如下

## 定义资源 ##

### 定义vpc ###

vim vpc.tf

resource "aws_vpc" "myvpc" {
      cidr_block = "172.17.0.0/16"
      enable_dns_hostnames = true
      enable_dns_support   = true
      instance_tenancy     = "default"
    
      tags = {
        Name = "myvpc"
      }
    }
    复制代码

使用terraform apply在aws上创建这个资源

可以看到这个这个vpc已经创建成功了，可以在aws界面上确认

记下这个vpc的id：vpc-054a32cba12d43efe

### 定义子网 ###

vim sn.tf

resource "aws_subnet" "mysubnt-b1" {
        vpc_id                  = "vpc-054a32cba12d43efe"
        cidr_block              = "172.17.1.0/24"
        availability_zone       = "cn-northwest-1b"
        map_public_ip_on_launch = false
    
        tags {
            Name = "mysubnt-b1"
        }
    }
    复制代码

查看操作效果

在这个aws界面上确认

记下这个subnet id: subnet-0b3cebdaada76cfac

### 定义实例 ###

vim ec2.tf

resource "aws_instance" "myinstance" {
      ami           = "ami-0135cb179d33fbe3e"
      instance_type = "t2.medium"
    
      key_name = "dev"
      subnet_id = "subnet-0b3cebdaada76cfac"
      private_ip = "172.17.1.101"
    
      tags = {
            Name = "myinstance"
      }
    }
    复制代码

同样可以在aws网页上确认

## 更新资源 ##

比如把上面这个ec2规格修改成：t2.small vim ec2.tf修改后的ec2.tf如下

resource "aws_instance" "myinstance" {
      ami           = "ami-0135cb179d33fbe3e"
      instance_type = "t2.small"
    
      key_name = "dev"
      subnet_id = "subnet-0b3cebdaada76cfac"
      private_ip = "172.17.1.101"
    
      tags = {
            Name = "myinstance"
      }
    }
    复制代码

然后使用这个`terraform apply`命令执行修改

可以看到terraform已经成功识别到了这个修改

可以在aws web界面上进行确认

## 删除资源 ##

可以使用命令`terraform destroy`删除上面创建的所有资源

操作效果如下

可以看到资源已经被删除了

## 导入资源 ##

这个terraform可以导入已经存在的资源，参考：[www.terraform.io/docs/import…][www.terraform.io_docs_import]

## 一些注意的点 ##

1.  这个terraform是有状态的，\*.state就是保存状态的文件

还可以关注的资源如下：

1.  internet网关
2.  nat网关

上面操作后的文件结构如下

这个terraform的配置文件可以定义变量，参考：[www.terraform.io/docs/config…][www.terraform.io_docs_config]

## 参考资料 ##

定义负载均衡器参考：[www.terraform.io/docs/provid…][www.terraform.io_docs_provid 1]

1.  [www.infoq.cn/article/9-r…][www.infoq.cn_article_9-r]
2.  [www.terraform.io/docs/provid…][www.terraform.io_docs_provid 2]
3.  [www.terraform.io/docs/provid…][www.terraform.io_docs_provid 3]
4.  [www.terraform.io/docs/provid…][www.terraform.io_docs_provid]
5.  [www.terraform.io/downloads.h…][www.terraform.io_downloads.h]
6.  [aws.amazon.com/cn/ec2/inst…][aws.amazon.com_cn_ec2_inst]
7.  [www.terraform.io/docs/config…][www.terraform.io_docs_config]

转载于:https://juejin.im/post/5ce8cb02e51d45108c59a4ad

[www.terraform.io_docs_provid]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fproviders%2F
[www.terraform.io_downloads.h]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdownloads.html
[docs.aws.amazon.com_zh_cn_gener]: https://link.juejin.im?target=https%3A%2F%2Fdocs.aws.amazon.com%2Fzh_cn%2Fgeneral%2Flatest%2Fgr%2Frande.html
[www.terraform.io_docs_import]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fimport%2Findex.html
[www.terraform.io_docs_config]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fconfiguration%2Fvariables.html
[www.terraform.io_docs_provid 1]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fproviders%2Faws%2Fr%2Felb.html
[www.infoq.cn_article_9-r]: https://link.juejin.im?target=https%3A%2F%2Fwww.infoq.cn%2Farticle%2F9-reasons-why-terraform-is-a-pain-but-you-should-still-care
[www.terraform.io_docs_provid 2]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fproviders%2Faws%2F
[www.terraform.io_docs_provid 3]: https://link.juejin.im?target=https%3A%2F%2Fwww.terraform.io%2Fdocs%2Fproviders%2Faws%2Fr%2Fami.html
[aws.amazon.com_cn_ec2_inst]: https://link.juejin.im?target=https%3A%2F%2Faws.amazon.com%2Fcn%2Fec2%2Finstance-types%2F