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A network filesystem client to connect to Minio and Amazon S3 compatible cloud storage servers
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DEPRECATED - This project is deprecated and not maintained anymore. It is recommended for all users to use one of the following options intead.

MinFS Quickstart Guide Slack Go Report Card Docker Pulls

MinFS is a fuse driver for Amazon S3 compatible object storage server. MinFS lets you mount a remote bucket (from a S3 compatible object store), as if it were a local directory. This allows you to read and write from the remote bucket just by operating on the local mount directory.

MinFS helps legacy applications use modern object stores with minimal config changes. MinFS uses BoltDB for caching and saving metadata, list of files, permissions, owners etc.

Be careful, it is always possible to remove boltdb cache. Cache will be recreated by MinFS synchronizing metadata from the server.

POSIX Compatibility

MinFS is not a POSIX conformant filesystem and it does not intend to be one. MinFS is built for legacy applications that needs to access an object store but does not expect strict POSIX compatibility. Please use MinFS if this fits your needs.

Use cases not suitable for MinFS use are:

  • Running a database on MinFS such as postgres, mysql etc.
  • Running virtual machines on MinFS such as qemu/kvm.
  • Running rich POSIX applications which rely on POSIX locks, Extended attribute operations etc.

Some use cases suitable for MinFS are:

  • Serving a static web-content with NGINX, Apache2 web servers.
  • Serving as backup destination for legacy tools unable to speak S3 protocol.


Minimum Requirements


Download the pre-built RPMs from here

yum install minfs-0.0.20170226202056-1.x86_64.rpm

Update config.json

Create a new config.json in /etc/minfs directory with your S3 server access and secret keys.

This example uses


Mount mybucket

Create an /etc/fstab entry /mnt/mounted/mybucket minfs defaults,cache=/tmp/mybucket 0 0

Now proceed to mount fstab entry.

mount /mnt/mounted/mybucket

Verify if mybucket is mounted and is accessible.

ls -F /mnt/mounted/mybucket
etc/  issue

MinFS Docker Volume plugin

MinFS can also be used via the MinFS Docker volume plugin. You can mount a local folder onto a Docker container, without having to go through the dependency installation or the mount and unmount operations of MinFS.

Minimum Requirements

Using Docker Compose

Use docker-compose to create a volume using the plugin and share the volume with other containers. In the example below the volume is created using the minfs plugin and and used by nginx container to serve the static content from the bucket.

version: '2'
    image: nginx
      - "80:80"
      - my-test-store:/usr/share/nginx/html:ro

    driver: minio/minfs
      access-key: Q3AM3UQ867SPQQA43P2F
      secret-key: zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG
      bucket: testbucket
      opts: cache=/tmp/my-test-store

Please change the endpoint, access-key, secret-key and bucket for your local Minio setup.

Once you have successfully created docker-compose.yml configuration in your current working directory.

docker-compose up

Using Docker

One can even manually install the plugin, create and the volume using docker.

Install the plugin

docker plugin install minio/minfs

Create a docker volume my-test-store using minio/minfs driver.

docker volume create -d minio/minfs \
  --name my-test-store \
  -o endpoint= \
  -o access-key=Q3AM3UQ867SPQQA43P2F \
  -o secret-key=zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG \
  -o bucket=testbucket
  -o opts=cache=/tmp/my-test-store

Please change the endpoint, access-key, secret-key, bucket and opts for your local Minio setup.

Once you have successfully created the volume, start a new container with my-test-store attached. In the example below nginx container is run to serve pages from the new volume.

docker run -d --name my-test-server -p 80:80 -v my-test-store:/usr/share/nginx/html:ro nginx

Test nginx Service

Either of the above steps create a MinFS based volume for a Nginx container. Verify if your nginx container is running properly and serving content.

curl localhost
<!DOCTYPE html>
<title>Welcome to nginx!</title>
  body {
   width: 35em;
   margin: 0 auto;
   font-family: Tahoma, Verdana, Arial, sans-serif;
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href=""></a>.<br/>
Commercial support is available at
<a href=""></a>.</p>

<p><em>Thank you for using nginx.</em></p>