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# Guide - Setup HackMD S3 image upload
1. Go to [AWS S3 console](https://console.aws.amazon.com/s3/home) and create a new bucket.
2. Click on bucket, select **Properties** on the side panel, and find **Permission** section. Click **Edit bucket policy**.
3. Enter the following policy, replace `bucket_name` with your bucket name:
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::bucket_name/uploads/*"
}
]
}
```
4. Go to IAM console and create a new IAM user. Remember your user credentials(`key`/`access token`)
5. Enter user page, select **Permission** tab, look at **Inline Policies** section, and click **Create User Policy**
6. Select **Custom Policy**
7. Enter the following policy, replace `bucket_name` with your bucket name:
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:*"
],
"Resource": [
"arn:aws:s3:::bucket_name/uploads/*"
]
}
]
}
```
8. Edit `config.json` and set following keys:
```javascript
{
"production": {
...
"imageUploadType": "s3",
"s3": {
"accessKeyId": "YOUR_S3_ACCESS_KEY_ID",
"secretAccessKey": "YOUR_S3_ACCESS_KEY",
"region": "YOUR_S3_REGION", // example: ap-northeast-1
"bucket": "YOUR_S3_BUCKET_NAME"
}
}
}
```
9. In additional to edit `config.json` directly, you could also try [environment variable](https://github.com/hackmdio/hackmd#environment-variables-will-overwrite-other-server-configs).
## Related Tools
* [AWS Policy Generator](http://awspolicygen.s3.amazonaws.com/policygen.html)
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