1. 首先，在Terraform中创建命名空间：

resource "aws_codepipeline" "my-pipeline" {
  name = "my-pipeline"
  role_arn = "${aws_iam_role.pipeline-role.arn}"

  artifact_store {
    location = "${var.artifact_store_location}"
    type = "S3"
  }

  stage {
    name = "Source"
    action {
      name = "Source"
      category = "Source"
      owner = "AWS"
      provider = "S3"
      version = "1"
      configuration {
        BucketName = "${var.source_s3_bucket}"
        ObjectKey = "${var.source_s3_object}"
      }
      output_artifacts = ["source"]
    }
  }

  stage {
    name = "Build"
    action {
      name = "Build"
      category = "Build"
      owner = "AWS"
      provider = "CodeBuild"
      version = "1"
      configuration {
        ProjectName = "${var.build_project_name}"
      }
      input_artifacts = ["source"]
      output_artifacts = ["build"]
    }
  }

  stage {
    name = "Deploy"
    action {
      name = "Deploy"
      category = "Deploy"
      owner = "AWS"
      provider = "ECS"
      version = "1"
      configuration {
        ClusterName = "${var.cluster_name}"
        ServiceName = "${var.service_name}"
        FileName = "${var.build_artifact_name}"
      }
      input_artifacts = ["build"]
    }
  }
}

resource "aws_codepipeline" "my-pipeline2" {
  name = "my-pipeline2"
  ...
}

2. 对于每个操作，使用前缀“namespace-”，在AWS中创建唯一的名称：

stage {
  name = "Deploy"
  action {
    name = "namespace-Deploy"
    category = "Deploy"
    owner = "AWS"
    provider = "ECS"
    version = "1"
    configuration {
      ClusterName = "${var.cluster_name}"
      ServiceName = "${var.service_name}"
      FileName = "${var.build_artifact_name}"
      NameSpace = "${var.app_namespace}"
    }
    input_artifacts =