在 AWS CloudFormation 中使用动态引用

如何解决在 AWS CloudFormation 中使用动态引用

我正在尝试使用 CloudFormation 创建 IAM 角色。以下代码段显示了信任策略：

{
  "Version": "2012-10-17","Statement": [
    {
      "Effect": "Allow","Principal": {
        "Federated": "arn:aws:iam::1234567890123:oidc-provider/oidc.eks.us-east-1.amazonaws.com/id/89ABCDWEFGHRRUUUR4DDF70C"
      },"Action": "sts:AssumeRoleWithWebIdentity","Condition": {
        "StringEquals": {
          "oidc.eks.us-east-1.amazonaws.com/id/89ABCDWEFGHRRUUUR4DDF70C:sub": "system:serviceaccount:kube-system:aws-load-balancer-controller"
        }
      }
    }
  ]
}

我想让它动态化，因为它应该从映射或参数中选择 OIDC 提供程序的值。

这是我目前所做的：

"AssumeRolePolicyDocument": {
          "Version": "2012-10-17","Statement": [
            {
              "Effect": "Allow","Principal": {
                "Federated": {
                  "Fn::Join": [
                    "",[
                      {
                        "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:oidc-provider/"
                      },{
                        "Fn::FindInMap": [
                          "Environments",{
                            "Ref": "EnvironUsed"
                          },"OIDCProvider"
                        ]
                      }
                    ]
                  ]
                }
              },"Condition": {
                "StringEquals": {
                  "oidc.eks.us-east-1.amazonaws.com/id/89738A59036B9EB2704B9ABC44DDF70C:sub" : "system:serviceaccount:kube-system:aws-load-balancer-controller"
                }
              }
            }
          ]
        }

我无法使最后一部分（提到 OIDC 提供商的条件部分）动态化。当我尝试在花括号中包含 Fn::Join 代替 "oidc.eks.us-east-1.amazonaws.com/id/89ABCDWEFGHRRUUUR4DDF70C:sub"

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