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如何修复 Terraform 无效的 JSON 策略

tag-icon • tag-icon kubernetes terraform amazon-iam amazon-eks aws-eks
如何修复 Terraform 无效的 JSON 策略

我正在尝试在 terraform 中使用包含负载均衡器 iam 策略的文件来为我的 AWS 使用。但是，当我运行 terraform 脚本时，出现以下错误：

 Error: "policy" contains an invalid JSON policy
│ 
│   with module.iam.aws_iam_policy.test-AWSLoadBalancerControllerIAMPolicy,
│   on ../resources/IAM/main.tf line 77, in resource "aws_iam_policy" "test-AWSLoadBalancerControllerIAMPolicy":
│   77:  policy = jsonencode(var.policy_file)

我正在使用 jsonencode 函数导入策略文件的内容。

resource "aws_iam_policy" "test-AWSLoadBalancerControllerIAMPolicy" {
 name = var.aws_loadbalancer_controller_policy
 policy = jsonencode(var.policy_file)
}

上面的 iam_policy_file 变量的值像这样传入file("../resources/IAM/policy.json")，该文件的内容如下所示，我已经检查过这个 json 文件是否在线解析为有效的 json，并且确实如此，但是 Terraform 抛出错误，好像它的格式不正确。

策略.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iam:CreateServiceLinkedRole"
            ],
            "Resource": "*",
            "Condition": {
                "StringEquals": {
                    "iam:AWSServiceName": "elasticloadbalancing.amazonaws.com"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeAccountAttributes",
                "ec2:DescribeAddresses",
                "ec2:DescribeAvailabilityZones",
                "ec2:DescribeInternetGateways",
                "ec2:DescribeVpcs",
                "ec2:DescribeVpcPeeringConnections",
                "ec2:DescribeSubnets",
                "ec2:DescribeSecurityGroups",
                "ec2:DescribeInstances",
                "ec2:DescribeNetworkInterfaces",
                "ec2:DescribeTags",
                "ec2:GetCoipPoolUsage",
                "ec2:DescribeCoipPools",
                "elasticloadbalancing:DescribeLoadBalancers",
                "elasticloadbalancing:DescribeLoadBalancerAttributes",
                "elasticloadbalancing:DescribeListeners",
                "elasticloadbalancing:DescribeListenerCertificates",
                "elasticloadbalancing:DescribeSSLPolicies",
                "elasticloadbalancing:DescribeRules",
                "elasticloadbalancing:DescribeTargetGroups",
                "elasticloadbalancing:DescribeTargetGroupAttributes",
                "elasticloadbalancing:DescribeTargetHealth",
                "elasticloadbalancing:DescribeTags"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "cognito-idp:DescribeUserPoolClient",
                "acm:ListCertificates",
                "acm:DescribeCertificate",
                "iam:ListServerCertificates",
                "iam:GetServerCertificate",
                "waf-regional:GetWebACL",
                "waf-regional:GetWebACLForResource",
                "waf-regional:AssociateWebACL",
                "waf-regional:DisassociateWebACL",
                "wafv2:GetWebACL",
                "wafv2:GetWebACLForResource",
                "wafv2:AssociateWebACL",
                "wafv2:DisassociateWebACL",
                "shield:GetSubscriptionState",
                "shield:DescribeProtection",
                "shield:CreateProtection",
                "shield:DeleteProtection"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:AuthorizeSecurityGroupIngress",
                "ec2:RevokeSecurityGroupIngress"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:CreateSecurityGroup"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:CreateTags"
            ],
            "Resource": "arn:aws:ec2:*:*:security-group/*",
            "Condition": {
                "StringEquals": {
                    "ec2:CreateAction": "CreateSecurityGroup"
                },
                "Null": {
                    "aws:RequestTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:CreateTags",
                "ec2:DeleteTags"
            ],
            "Resource": "arn:aws:ec2:*:*:security-group/*",
            "Condition": {
                "Null": {
                    "aws:RequestTag/elbv2.k8s.aws/cluster": "true",
                    "aws:ResourceTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "ec2:AuthorizeSecurityGroupIngress",
                "ec2:RevokeSecurityGroupIngress",
                "ec2:DeleteSecurityGroup"
            ],
            "Resource": "*",
            "Condition": {
                "Null": {
                    "aws:ResourceTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:CreateLoadBalancer",
                "elasticloadbalancing:CreateTargetGroup"
            ],
            "Resource": "*",
            "Condition": {
                "Null": {
                    "aws:RequestTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:CreateListener",
                "elasticloadbalancing:DeleteListener",
                "elasticloadbalancing:CreateRule",
                "elasticloadbalancing:DeleteRule"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:AddTags",
                "elasticloadbalancing:RemoveTags"
            ],
            "Resource": [
                "arn:aws:elasticloadbalancing:*:*:targetgroup/*/*",
                "arn:aws:elasticloadbalancing:*:*:loadbalancer/net/*/*",
                "arn:aws:elasticloadbalancing:*:*:loadbalancer/app/*/*"
            ],
            "Condition": {
                "Null": {
                    "aws:RequestTag/elbv2.k8s.aws/cluster": "true",
                    "aws:ResourceTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:AddTags",
                "elasticloadbalancing:RemoveTags"
            ],
            "Resource": [
                "arn:aws:elasticloadbalancing:*:*:listener/net/*/*/*",
                "arn:aws:elasticloadbalancing:*:*:listener/app/*/*/*",
                "arn:aws:elasticloadbalancing:*:*:listener-rule/net/*/*/*",
                "arn:aws:elasticloadbalancing:*:*:listener-rule/app/*/*/*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:ModifyLoadBalancerAttributes",
                "elasticloadbalancing:SetIpAddressType",
                "elasticloadbalancing:SetSecurityGroups",
                "elasticloadbalancing:SetSubnets",
                "elasticloadbalancing:DeleteLoadBalancer",
                "elasticloadbalancing:ModifyTargetGroup",
                "elasticloadbalancing:ModifyTargetGroupAttributes",
                "elasticloadbalancing:DeleteTargetGroup"
            ],
            "Resource": "*",
            "Condition": {
                "Null": {
                    "aws:ResourceTag/elbv2.k8s.aws/cluster": "false"
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:RegisterTargets",
                "elasticloadbalancing:DeregisterTargets"
            ],
            "Resource": "arn:aws:elasticloadbalancing:*:*:targetgroup/*/*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "elasticloadbalancing:SetWebAcl",
                "elasticloadbalancing:ModifyListener",
                "elasticloadbalancing:AddListenerCertificates",
                "elasticloadbalancing:RemoveListenerCertificates",
                "elasticloadbalancing:ModifyRule"
            ],
            "Resource": "*"
        }
    ]
}

我从 AWS 文档中下载了这个文件这里

我也尝试通过从 http 响应中读取文件来使其工作，如下所示，但我仍然遇到同样的问题JSON 无效

data "http" "policy_json" {
  url = "https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.4.4/docs/install/iam_policy.json"
}

resource "aws_iam_policy" "test-AWSLoadBalancerControllerIAMPolicy" {
  name = var.aws_loadbalancer_controller_policy
  policy = data.http.policy_json.request_body
}

答案1

您必须确保您分配的字符串包含对象的 JSON 表示形式。

根据您的描述，很难准确了解您的设置方式，但您应该检查以下一些潜在问题：

  1. 如果var.policy_file包含文件名，则 JSON 编码该文件名将生成包含文件名的 JSON 字符串。例如，如果var.policy_file是../resources/IAM/policy.json，则 JSON 编码将生成字面上的"../resources/IAM/policy.json"，这不是有效的 IAM 策略。
  2. 如果var.policy_file包含直接结果，file("../resources/IAM/policy.json")则表示您要求 Terraform 创建已包含 JSON 内容的字符串的 JSON 编码。例如，如果您的文件包含{"Version": "2012-10-17"}JSON 编码，则会产生"{\"Version\": \"2012-10-17\"}"-- 一个恰好包含更多 JSON 的 JSON 字符串，这也不是有效的 IAM 策略。

在上述两种情况下，您jsonencode根本不需要使用，因为该文件大概已经包含 JSON 内容。

对于情况 1，您可以说policy = file(var.policy_file)直接分配文件的内容。

对于情况 2，您可以说policy = var.policy_file直接分配该变量中的 JSON 字符串。

jsonencode仅当您打算分配尚未分配的 Terraform 对象值时才需要使用已经经过 JSON 编码，如下所示：

policy = jsonencode({
  "Version" = "2012-10-17"
  # ...
})

在这种情况下，jsonencode需要将非字符串 Terraform 对象值转换为参数policy所需的 JSON 字符串。

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