Anfängertutorial: Verwalten von Google Cloud Storage-Buckets und Objekten mit n8n

• •OpenAI API Key

{
  "id": "nSlsWDi56czfBf3u",
  "meta": {
    "instanceId": "4a2e6764ba7a6bc9890d9225f4b21d570ce88fc9bd57549c89057fcee58fed0f",
    "templateCredsSetupCompleted": true
  },
  "name": "Beginner’s Tutorial: Manage Google Cloud Storage Buckets and Objects with n8n",
  "tags": [
    {
      "id": "NacOgNreMya1Dsve",
      "name": "google cloud",
      "createdAt": "2025-08-17T07:30:47.533Z",
      "updatedAt": "2025-08-17T07:30:47.533Z"
    }
  ],
  "nodes": [
    {
      "id": "45a84f10-bd83-4896-8419-1e7ef93377c5",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        448,
        248
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4.1-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "PPSwAKeLQYgAPobT",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "9ba48335-7513-4c59-a727-c2bdb45241aa",
      "name": "Bild generieren",
      "type": "@n8n/n8n-nodes-langchain.openAi",
      "position": [
        752,
        24
      ],
      "parameters": {
        "prompt": "={{ $json.output }}",
        "options": {},
        "resource": "image"
      },
      "credentials": {
        "openAiApi": {
          "id": "PPSwAKeLQYgAPobT",
          "name": "OpenAi account"
        }
      },
      "typeVersion": 1.8
    },
    {
      "id": "bb4afa1e-8c09-402c-bc36-ba6f4f973a48",
      "name": "Prompt-Generierungs-Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        352,
        24
      ],
      "parameters": {
        "text": "=You're prompt generator agent, you will create prompt for the open-ai image generation model with a random topic among:\n- Education\n- Science \n- Sport\n- Economy\n- Health\nOutput the prompt only, nothing else",
        "options": {},
        "promptType": "define"
      },
      "typeVersion": 2.1
    },
    {
      "id": "127f18fb-aba1-4524-9ffe-874571d0e1cc",
      "name": "Bei Klick auf 'Workflow ausführen'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -320,
        -124
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "b985d495-9156-4b5b-9042-163c13095bd0",
      "name": "Felder bearbeiten",
      "type": "n8n-nodes-base.set",
      "position": [
        -96,
        -124
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "af3e6c69-fbfe-49f4-9c29-3a68a821c5a6",
              "name": "project_id",
              "type": "string",
              "value": "n8n-project-467007"
            },
            {
              "id": "1a693ae0-2ba0-4b1b-a00a-4399a8d3ab57",
              "name": "location",
              "type": "string",
              "value": "asia-southeast1"
            }
          ]
        }
      },
      "typeVersion": 3.4
    },
    {
      "id": "771db667-e53d-44da-9493-62aac39fbf6c",
      "name": "Bucket-Liste für ein bestimmtes Projekt abrufen",
      "type": "n8n-nodes-base.googleCloudStorage",
      "position": [
        128,
        -272
      ],
      "parameters": {
        "projectId": "={{ $json.project_id }}",
        "requestOptions": {}
      },
      "credentials": {
        "googleCloudStorageOAuth2Api": {
          "id": "SW5pWMqnAkS2RL3K",
          "name": "Google Cloud Storage account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "cc89fc60-4a79-45f9-af40-99425e9eb1e9",
      "name": "Neuen Bucket erstellen",
      "type": "n8n-nodes-base.googleCloudStorage",
      "position": [
        128,
        24
      ],
      "parameters": {
        "createAcl": {},
        "operation": "create",
        "projectId": "={{ $json.project_id }}",
        "bucketName": "=bucket{{ $workflow.id.toLowerCase() }}{{ $now.format('hhmm') }}",
        "createBody": {
          "dataLocations": "=[ {{ $json.location }}]"
        },
        "requestOptions": {}
      },
      "credentials": {
        "googleCloudStorageOAuth2Api": {
          "id": "SW5pWMqnAkS2RL3K",
          "name": "Google Cloud Storage account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "b23df0ef-1fa9-41b4-97dd-9493f58ca7af",
      "name": "No Operation, keine Aktion",
      "type": "n8n-nodes-base.noOp",
      "position": [
        440,
        -272
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "bbda235c-aecb-4d0b-9174-eb5046017402",
      "name": "Objekt erstellen",
      "type": "n8n-nodes-base.googleCloudStorage",
      "position": [
        976,
        24
      ],
      "parameters": {
        "resource": "object",
        "operation": "create",
        "bucketName": "={{ $('Create a new Bucket').item.json.name }}",
        "createData": {},
        "objectName": "=object_{{ $now.format('yyyyMMdd') }}.{{ $json.fileExtension }}",
        "createQuery": {},
        "requestOptions": {},
        "encryptionHeaders": {}
      },
      "credentials": {
        "googleCloudStorageOAuth2Api": {
          "id": "SW5pWMqnAkS2RL3K",
          "name": "Google Cloud Storage account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "4c62f2ea-3891-46fd-bd3c-f3b9cabe2566",
      "name": "Objekt aus Bucket löschen",
      "type": "n8n-nodes-base.googleCloudStorage",
      "position": [
        1200,
        24
      ],
      "parameters": {
        "resource": "object",
        "operation": "delete",
        "bucketName": "={{ $json.bucket }}",
        "objectName": "={{ $json.name }}",
        "getParameters": {},
        "requestOptions": {}
      },
      "credentials": {
        "googleCloudStorageOAuth2Api": {
          "id": "SW5pWMqnAkS2RL3K",
          "name": "Google Cloud Storage account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "0f7d43ea-ca03-4fb5-a13c-ce238a16158d",
      "name": "Notizzettel",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1680,
        -640
      ],
      "parameters": {
        "width": 1200,
        "height": 1280,
        "content": "# Beginner’s Tutorial: Manage Google Cloud Storage Buckets and Objects with n8n\n\n## **Who’s it for**\n- Beginners who want to learn how to automate Google Cloud Storage (GCS) operations with n8n.  \n- Developers who want to combine **AI image generation** with **cloud storage management**.  \n- Anyone looking for a simple introduction to working with **Buckets** and **Objects** in GCS.  \n\n## **How it works / What it does**\nThis workflow demonstrates end-to-end usage of **Google Cloud Storage** with AI integration:  \n\n1. **Trigger:** Start manually by clicking *Execute Workflow*.  \n2. **Edit Fields:** Provide input values (e.g., bucket name or image description).  \n3. **List Buckets:** Retrieve all existing buckets in the project (branch: view only).  \n4. **Create Bucket:** If needed, create a new bucket to store objects.  \n5. **Prompt Generation Agent:** Use an AI model to generate a creative text prompt.  \n6. **Generate Image:** Convert the AI-generated prompt into an image.  \n7. **Upload Object:** Store the generated image as an object in the selected bucket.  \n8. **Delete Object:** Clean up by removing the uploaded object if required.  \n\nThis shows the full lifecycle: *Bucket → Object (Create/Upload/Delete)* combined with AI image generation.  \n\n## **How to set up**\n1. **Trigger the workflow:** Use the *When clicking Execute workflow* node to start manually.  \n2. **Provide inputs:** In *Edit Fields*, specify details such as bucket name or description text for the image.  \n3. **List buckets:** Use the *List Buckets* node to see what exists.  \n4. **Create a bucket:** Use *Create Bucket* if you want a new storage bucket.  \n5. **Generate prompt & image:**  \n   - The *Prompt Generation Agent* uses an OpenAI Chat Model to create an image prompt.  \n   - The *Generate an Image* node turns this prompt into an actual image.  \n6. **Upload to bucket:** Use *Create Object* to upload the generated image into your GCS bucket.  \n7. **Delete object (optional):** Use *Delete Object* to remove the file from the bucket as a cleanup step.  \n\n## **Requirements**\n- An active **Google Cloud account** with **Cloud Storage API enabled**.  \n- A **Service Account Key (JSON)** credential added in n8n for GCS.  \n- An **OpenAI API Key** configured in n8n for the prompt and image generation nodes.  \n- Basic familiarity with running workflows in n8n.  \n  \n## **How to customize the workflow**\n- **Different object types:** Instead of images, upload PDFs, logs, or text files.  \n- **Automatic cleanup:** Skip the delete step if you want objects to persist.  \n- **Schedule trigger:** Replace manual execution with a weekly or daily schedule.  \n- **Dynamic prompts:** Accept user input from a form or webhook to generate images.  \n- **Multi-bucket management:** Extend the logic to manage multiple buckets across projects.  \n- **Notifications:** Add a Slack/Email step after upload to notify your team with the object URL.  \n\n✅ By the end of this tutorial, you’ll understand how to:  \n- Work with **Buckets** (list, create).  \n- Work with **Objects** (upload, delete).  \n- Integrate **AI image generation** with Google Cloud Storage.  "
      },
      "typeVersion": 1
    },
    {
      "id": "583e8c1e-2656-4826-a44f-3473e2ce63df",
      "name": "Notizzettel1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -400,
        -304
      ],
      "parameters": {
        "width": 352,
        "height": 112,
        "content": "### 1. Start the Workflow\nBegin by manually executing the workflow. This helps you test and understand each step before automating it with a schedule."
      },
      "typeVersion": 1
    },
    {
      "id": "93a9d84f-15ee-4abc-88b2-2ded850d044d",
      "name": "Notizzettel2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -176,
        48
      ],
      "parameters": {
        "height": 128,
        "content": "### 2. Provide Input Fields\nFill in the required fields such as the bucket name and image description. These inputs will guide how the workflow runs."
      },
      "typeVersion": 1
    },
    {
      "id": "54648e02-71b1-4cb9-93c1-0911a8752a27",
      "name": "Notizzettel3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        96,
        -512
      ],
      "parameters": {
        "height": 192,
        "content": "### 3. List all the current Google Cloud Storage buckets \nList all the current Google Cloud Storage buckets in your project. This lets you see what’s already available before creating new ones.\n\n"
      },
      "typeVersion": 1
    },
    {
      "id": "2102a37c-3c07-4629-b31e-24b1d093973d",
      "name": "Notizzettel4",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        80,
        240
      ],
      "parameters": {
        "height": 128,
        "content": "### 4. Create a New Bucket\nIf the bucket you want does not exist, the workflow can create a new bucket for you automatically."
      },
      "typeVersion": 1
    },
    {
      "id": "401fb591-bb05-484c-8b50-48ad51f68e60",
      "name": "Notizzettel5",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        352,
        -144
      ],
      "parameters": {
        "width": 496,
        "content": "\n### 5. Generate an AI Prompt\n- Use the AI agent to turn your simple input into a more descriptive or creative prompt. This will be used for image generation.\n- Send the AI-generated prompt to the image generation node and produce an image file."
      },
      "typeVersion": 1
    },
    {
      "id": "8129411b-27a2-4d11-ab54-e73a7af4042c",
      "name": "Notizzettel6",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        912,
        240
      ],
      "parameters": {
        "height": 144,
        "content": "### 7. Upload the Image to a Bucket\nTake the generated image and upload it as an object inside your chosen Google Cloud Storage bucket."
      },
      "typeVersion": 1
    },
    {
      "id": "a6246de7-0736-4040-af21-18b337e3e524",
      "name": "Notizzettel7",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1184,
        -176
      ],
      "parameters": {
        "content": "### 8. Delete the Object (Optional)\nIf you no longer need the file, the workflow can also remove the object from the bucket to keep storage clean."
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "3f6f80f3-c6fd-4640-b5c2-2f3c89eec940",
  "connections": {
    "b985d495-9156-4b5b-9042-163c13095bd0": {
      "main": [
        [
          {
            "node": "771db667-e53d-44da-9493-62aac39fbf6c",
            "type": "main",
            "index": 0
          },
          {
            "node": "cc89fc60-4a79-45f9-af40-99425e9eb1e9",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "bbda235c-aecb-4d0b-9174-eb5046017402": {
      "main": [
        [
          {
            "node": "4c62f2ea-3891-46fd-bd3c-f3b9cabe2566",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "9ba48335-7513-4c59-a727-c2bdb45241aa": {
      "main": [
        [
          {
            "node": "bbda235c-aecb-4d0b-9174-eb5046017402",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "45a84f10-bd83-4896-8419-1e7ef93377c5": {
      "ai_languageModel": [
        [
          {
            "node": "bb4afa1e-8c09-402c-bc36-ba6f4f973a48",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "cc89fc60-4a79-45f9-af40-99425e9eb1e9": {
      "main": [
        [
          {
            "node": "bb4afa1e-8c09-402c-bc36-ba6f4f973a48",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "bb4afa1e-8c09-402c-bc36-ba6f4f973a48": {
      "main": [
        [
          {
            "node": "9ba48335-7513-4c59-a727-c2bdb45241aa",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "127f18fb-aba1-4524-9ffe-874571d0e1cc": {
      "main": [
        [
          {
            "node": "b985d495-9156-4b5b-9042-163c13095bd0",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "771db667-e53d-44da-9493-62aac39fbf6c": {
      "main": [
        [
          {
            "node": "b23df0ef-1fa9-41b4-97dd-9493f58ca7af",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}