Using external storages to store Funkwhale content

By default, Funkwhale will store user-uploaded and related media such as audio files, transcoded files, avatars and album covers on a server directory.

However, for bigger instances or more complex deployment scenarios, you may want to use distributed or external storages.

S3 and S3-compatible servers

Note

This feature was released in Funkwhale 0.19 and is still considered experimental. Please let us know if you see anything unusual while using it.

Funkwhale supports storing media files Amazon S3 and compatible implementations such as Minio or Wasabi.

In this scenario, the content itself is stored in the S3 bucket. Non-sensitive media such as album covers or user avatars are served directly from the bucket. However, audio files are still served by the reverse proxy, to enforce proper authentication.

To enable S3 on Funkwhale, add the following environment variables:

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_STORAGE_BUCKET_NAME=
# An optional bucket subdirectory were you want to store the files. This is especially useful
# if you plan to use share the bucket with other services
# AWS_LOCATION=

# If you use a S3-compatible storage such as minio, set the following variable
# the full URL to the storage server. Example:
#   AWS_S3_ENDPOINT_URL=https://minio.mydomain.com
# AWS_S3_ENDPOINT_URL=

Then, edit your nginx configuration. On docker setups, the file is located at /srv/funkwhale/nginx/funkwhale.template, and at /etc/nginx/sites-available/funkwhale.template on non-docker setups.

Replace the location /_protected/media block with the following:

location ~ /_protected/media/(.+) {
    internal;
    # Needed to ensure DSub auth isn't forwarded to S3/Minio, see #932
    proxy_set_header Authorization "";
    proxy_pass $1;
}

Add your S3 store URL to the img-src and media-src headers

add_header Content-Security-Policy "...img-src 'self' https://<your-s3-URL> data:;...media-src https://<your-s3-URL> 'self' data:";

Then restart Funkwhale and nginx.

From now on, media files will be stored on the S3 bucket you configured. If you already had media files before configuring the S3 bucket, you also have to move those on the bucket by hand (which is outside the scope of this guide).

Note

At the moment, we do not support S3 when using Apache as a reverse proxy.

Serving audio files directly from the bucket

Depending on your setup, you may want to serve audio fils directly from the S3 bucket instead of proxying them through Funkwhale, e.g to reduce the bandwidth consumption on your server, or get better performance.

You can achieve that by adding PROXY_MEDIA=false to your .env file.

When receiving a request on the stream endpoint, Funkwhale will check for authentication and permissions, then issue a 302 redirect to the file URL in the bucket.

This URL is actually be visible by the client, but contains a signature valid only for one hour, to ensure no one can reuse this URL or share it publicly to distribute unauthorized content.

Note

If you are using Amazon S3, you will need to set your AWS_S3_REGION_NAME in the .env file to use this feature.

Note

Since some Subsonic clients don’t support 302 redirections, Funkwhale will ignore the PROXY_MEDIA setting and always proxy file when accessed through the Subsonic API.

Securing your S3 bucket

It’s important to ensure your the root of your bucket doesn’t list its content, which is the default on many S3 servers. Otherwise, anyone could find out the true URLs of your audio files and bypass authentication.

To avoid that, you can set the following policy on your bucket:

{
    "Version": "2012-10-17",
    "Statement": [
        {
        "Action": [
            "s3:GetObject"
        ],
        "Effect": "Allow",
        "Principal": {
            "AWS": [
            "*"
            ]
        },
        "Resource": [
            "arn:aws:s3:::<yourbucketname>/*"
        ],
        "Sid": "Public"
        }
    ]
}

If you are using awscli, you can store this policy in a /tmp/policy file, and apply it using the following command:

aws s3api put-bucket-policy --bucket <yourbucketname> --policy file:///tmp/policy

Troubleshooting

No Resolver Found

Depending on your setup, you may experience the following issue when trying to stream music directly from your S3-compatible store.

[error] 2832#2832: *1 no resolver defined to resolve [address] client: [IP], server: [servername], request: "GET API request", host: "[your_domain]", referrer: "[your_domain/library]"

This happpens when the nginx config is unable to use your server’s DNS resolver. This issue is still under investigation, but in the meantime can be worked around by specifying a resolver in your funkwhale.template under the location ~/_protected/media/(.+) section.

location ~ /_protected/media/(.+) {
    resolver 1.1.1.1;
    internal;
    proxy_set_header Authorization "";
    proxy_pass $1;
}

No Images or Media Loading

If you are serving media from an S3-compatible store, you may experience an issue where nothing loads in the front end. The error logs in your browser may show something like the following:

Content Security Policy: The page's settings blocked the loading of a resource at https://<your-s3-url> ("img-src")
Content Security Policy: The page's settings blocked the loading of a resource at https://<your-s3-url> ("media-src")

This happens when your S3 store isn’t defined in the Content-Security-Policy headers in your Nginx files. To resolve the issue, add the base URL of your S3 store to the img-src and media-src headers and reload nginx.

add_header Content-Security-Policy "...img-src 'self' https://<your-s3-URL> data:;...media-src https://<your-s3-URL> 'self' data:";

Broken Images in Audio Player On Page Reload

If you are serving media directly from an S3-compatible store, you may find that images in the queue and the player won’t load after the page is refreshed. This happens if the generated URL has expired and the authorization is no longer valid. You can extend the expiry time using the following setting in your .env file:

# The default value is 3600 (60 mins). The maximum is 604800 (7 days)
AWS_QUERYSTRING_EXPIRE=604800