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vsftpd Docker image based on Centos 7. Supports passive mode and virtual users.

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fauria/vsftpd

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This Docker container implements a vsftpd server, with the following features:

  • Centos 7 base image.
  • vsftpd 3.0
  • Virtual users
  • Passive mode
  • Logging to a file or STDOUT.

Installation from Docker registry hub.

You can download the image with the following command:

docker pull fauria/vsftpd

Environment variables

This image uses environment variables to allow the configuration of some parameteres at run time:

  • Variable name: FTP_USER
  • Default value: admin
  • Accepted values: Any string. Avoid whitespaces and special chars.
  • Description: Username for the default FTP account. If you don't specify it through the FTP_USER environment variable at run time, admin will be used by default.

  • Variable name: FTP_PASS
  • Default value: Random string.
  • Accepted values: Any string.
  • Description: If you don't specify a password for the default FTP account through FTP_PASS, a 16 characters random string will be automatically generated. You can obtain this value through the container logs.

  • Variable name: LOG_STDOUT
  • Default value: Empty string.
  • Accepted values: Any string to enable, empty string or not defined to disable.
  • Description: Output vsftpd log through STDOUT, so that it can be accessed through the container logs.

Exposed ports and volumes

The image exposes ports 20 and 21, along with the range 21100 - 21110 for passive mode. Also, exports two volumes: /home/vsftpd, which contains users home directories, and /var/log/vsftpd, used to store logs.

When sharing a homes directory between the host and the container (/home/vsftpd) the owner user id and group id should be 14 and 80 respectively. This correspond ftp user and ftp group on the container, but may match something else on the host.

Use cases

  1. Create a temporary container for testing purposes:
  docker run --rm fauria/vsftp
  1. Create a container with default user account, binding a data directory:
docker run -d -p 21:21 -v /my/data/directory:/home/vsftpd --name vsftpd fauria/vsftpd
# see logs for credentials:
docker logs vsftpd  
  1. Create a container with a custom user account, binding a data directory and enabling both active and passive mode:
docker run -d -v /my/data/directory:/home/vsftpd \
-p 20:20 -p 21:21 -p 21100:21100 -p 21101:21101 \
-p 21102:21102 -p 21103:21103 -p 21104:21104 \
-p 21105:21105 -p 21106:21106 -p 21107:21107 \
-p 21108:21108 -p 21109:21109 -p 21110:21110 \
-e FTP_USER=myuser -e FTP_PASS=mypass \
 --name vsftpd fauria/lap
  1. Manually add a new FTP user to the container:
docker exec -i -t vsftpd bash
mkdir /home/vsftpd/myuser
echo -e "myuser\nmypass" >> /etc/vsftpd/virtual_users.txt
/usr/bin/db_load -T -t hash -f /etc/vsftpd/virtual_users.txt /etc/vsftpd/virtual_users.db
exit
docker restart vsftpd

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vsftpd Docker image based on Centos 7. Supports passive mode and virtual users.

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