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hedgedoc/docs/guides/s3-image-upload.md
Johannes Weißl 89a2389586 Correct documentation of S3 bucket 
Documentation added in aaf034b on Nov 17th 2016 says the S3 bucket can
be specified with `s3.bucket`, but commit c8bcc4c (#285) on Dec 18th
2016 used `s3bucket`. Instead of fixing the code (#552) to match the
documentation this commit changes just the documentation so that
existing configurations are not broken. Also, the `s3` object is passed
as is to `AWS.S3()`, which does not know the option `bucket` (but
silently ignores it in my test).

http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#constructor-property

Following the old documentation leads to this exception:

    2017-09-23T09:42:38.079Z - error:  MissingRequiredParameter: Missing required key 'Bucket' in params
        at ParamValidator.fail (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/param_validator.js:50:37)
        at ParamValidator.validateStructure (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/param_validator.js:61:14)
        at ParamValidator.validateMember (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/param_validator.js:88:21)
        at ParamValidator.validate (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/param_validator.js:34:10)
        at Request.VALIDATE_PARAMETERS (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/event_listeners.js:125:42)
        at Request.callListeners (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/sequential_executor.js:105:20)
        at callNextListener (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/sequential_executor.js:95:12)
        at /srv/hackmd/hackmd/node_modules/aws-sdk/lib/event_listeners.js:85:9
        at finish (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/config.js:315:7)
        at /srv/hackmd/hackmd/node_modules/aws-sdk/lib/config.js:333:9
        at Credentials.get (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/credentials.js:126:7)
        at getAsyncCredentials (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/config.js:327:24)
        at Config.getCredentials (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/config.js:347:9)
        at Request.VALIDATE_CREDENTIALS (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/event_listeners.js:80:26)
        at Request.callListeners (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/sequential_executor.js:101:18)
        at Request.emit (/srv/hackmd/hackmd/node_modules/aws-sdk/lib/sequential_executor.js:77:10)
2017-09-23 18:28:57 +02:00

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Guide - Setup HackMD S3 image upload

  1. Go to AWS S3 console and create a new bucket.

    create-bucket

  2. Click on bucket, select Properties on the side panel, and find Permission section. Click Edit bucket policy.

    bucket-property

  3. Enter the following policy, replace bucket_name with your bucket name:

    bucket-policy-editor

    {
    "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

    iam-user

  6. Select Custom Policy

    custom-policy

  7. Enter the following policy, replace bucket_name with your bucket name:

    review-policy

    {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:*"
            ],
            "Resource": [
                "arn:aws:s3:::bucket_name/uploads/*"
            ]
        }
    ]
}

  8. Edit config.json and set following keys:

    {
    "production": {
        ...
        "imageUploadType": "s3",
        "s3": {
            "accessKeyId": "YOUR_S3_ACCESS_KEY_ID",
            "secretAccessKey": "YOUR_S3_ACCESS_KEY",
            "region": "YOUR_S3_REGION" // example: ap-northeast-1
        },
        "s3bucket": "YOUR_S3_BUCKET_NAME"
    }
}

  9. In additional to edit config.json directly, you could also try environment variable.

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