Terraform：添加单个规则时，所有安全组规则都被破坏和替换答案

【问题标题】：Terraform: All security group rules are destroyed and replaced when adding a single ruleTerraform：添加单个规则时，所有安全组规则都被破坏和替换
【发布时间】：2020-10-08 19:11:31
【问题描述】：

地形信息：

Terraform v0.12.18
provider.aws v2.43.0
provider.template v2.1.2

我定义了一个安全组：

如果我对现有堆栈运行 terraform plan 或 terraform apply，则没有待处理的更改，状态完全是最新的。

resource "aws_security_group" "sg_apps" {
  name        = "Custom apps ${var.env}"
  description = "Custom apps ${var.env}"
  vpc_id      = data.terraform_remote_state.vpc.outputs.vpc_east_id
  tags = {
    Name = "Custom apps ${var.env} - TF"
  }

  ingress {
    from_port = 3306
    to_port   = 3306
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8800
    to_port   = 8808
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8503
    to_port   = 8503
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8889
    to_port   = 8889
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }
}

如果我再添加一条规则：

resource "aws_security_group" "sg_tlapps" {
  name        = "Custom apps ${var.env}"
  description = "Custom apps ${var.env}"
  vpc_id      = data.terraform_remote_state.vpc.outputs.vpc_east_id
  tags = {
    Name = "Custom apps ${var.env} - TF"
  }

  ingress {
    from_port = 3306
    to_port   = 3306
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8800
    to_port   = 8808
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8503
    to_port   = 8503
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 8889
    to_port   = 8889
    protocol  = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }

  ingress {
    from_port = 9200
    to_port = 9200
    protocol = "tcp"
    cidr_blocks = [
      data.terraform_remote_state.vpc.outputs.m-1a_cidr,
      data.terraform_remote_state.vpc.outputs.m-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1b_cidr,
      data.terraform_remote_state.vpc.outputs.p-1a_cidr,
    ]
  }
}

apply 想要删除所有规则并重新创建它们——我不明白它为什么要全部替换它们。

这对于非生产环境来说很好，但我真的不想破坏我在产品中的防火墙规则以防任务中途失败或其他什么。我只是想将规则附加到 sg.

  # aws_security_group.sg_apps will be updated in-place
  ~ resource "aws_security_group" "sg_apps" {
        arn                    = "arn:aws:ec2:us-east-1:xxxxx:security-group/sg-xxxxxxxx"
        description            = "Custom apps prod"
        egress                 = []
        id                     = "sg-xxxxxxxxx"
      ~ ingress                = [
          - {
              - cidr_blocks      = [
                  - "10.10.100.0/24",
                  - "10.10.200.0/24",
                  - "10.10.1.0/24",
                  - "10.10.0.0/24",
                ]
              - description      = ""
              - from_port        = 3306
              - ipv6_cidr_blocks = []
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 3306
            },
          - {
              - cidr_blocks      = [
                  - "10.10.100.0/24",
                  - "10.10.200.0/24",
                  - "10.10.1.0/24",
                  - "10.10.0.0/24",
                ]
              - description      = ""
              - from_port        = 8503
              - ipv6_cidr_blocks = []
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 8503
            },
          - {
              - cidr_blocks      = [
                  - "10.10.100.0/24",
                  - "10.10.200.0/24",
                  - "10.10.1.0/24",
                  - "10.10.0.0/24",
                ]
              - description      = ""
              - from_port        = 8800
              - ipv6_cidr_blocks = []
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 8808
            },
          - {
              - cidr_blocks      = [
                  - "10.10.100.0/24",
                  - "10.10.200.0/24",
                  - "10.10.1.0/24",
                  - "10.10.0.0/24",
                ]
              - description      = ""
              - from_port        = 8889
              - ipv6_cidr_blocks = []
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 8889
            },
          + {
              + cidr_blocks      = [
                  + "10.10.100.0/24",
                  + "10.10.200.0/24",
                  + "10.10.1.0/24",
                  + "10.10.0.0/24",
                ]
              + description      = ""
              + from_port        = 9200
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 9200
            },
          + {
              + cidr_blocks      = [
                  + "10.10.100.0/24",
                  + "10.10.200.0/24",
                  + "10.10.1.0/24",
                  + "10.10.0.0/24",
                ]
              + description      = null
              + from_port        = 3306
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 3306
            },
          + {
              + cidr_blocks      = [
                  + "10.10.100.0/24",
                  + "10.10.200.0/24",
                  + "10.10.1.0/24",
                  + "10.10.0.0/24",
                ]
              + description      = null
              + from_port        = 8503
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 8503
            },
          + {
              + cidr_blocks      = [
                  + "10.10.100.0/24",
                  + "10.10.200.0/24",
                  + "10.10.1.0/24",
                  + "10.10.0.0/24",
                ]
              + description      = null
              + from_port        = 8800
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 8808
            },
          + {
              + cidr_blocks      = [
                  + "10.10.100.0/24",
                  + "10.10.200.0/24",
                  + "10.10.1.0/24",
                  + "10.10.0.0/24",
                ]
              + description      = null
              + from_port        = 8889
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 8889
            },
        ]
        name                   = "Custom apps prod"
        owner_id               = "xxxxxxxxxx"
        revoke_rules_on_delete = false
        tags                   = {
            "Name" = "Custom apps ${var.env} - TF"
        }
        vpc_id                 = "vpc-xxxxxxxxxxxxxxx"

        timeouts {}
    }

【问题讨论】：

最好通过terraform.io/docs/providers/aws/r/security_group_rule.html资源与API交互。这样就可以在更改时保留规则。
这似乎是正确的答案。如果你回答问题，我会标记它。

标签： terraform terraform-provider-aws

【解决方案1】：

如果您将aws_security_group 资源中的ingress 和egress 块转换为单独的aws_security_group_rule 资源，则在修改任何一个或多个其他规则时将不会重新创建规则。例如：

resource "aws_security_group_rule" "mysql" {
  type              = "ingress"
  from_port         = 3306
  to_port           = 3306
  protocol          = "tcp"
  cidr_blocks       = [
    data.terraform_remote_state.vpc.outputs.m-1a_cidr,
    data.terraform_remote_state.vpc.outputs.m-1b_cidr,
    data.terraform_remote_state.vpc.outputs.p-1b_cidr,
    data.terraform_remote_state.vpc.outputs.p-1a_cidr,
  ]
  security_group_id = aws_security_group.sg_apps.id
}

将替换您的第一个入口块。

【讨论】：