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Last pushed: 10 days ago
Short Description
Docker container for CrashPlan PRO (aka CrashPlan for Small Business)
Full Description

Docker container for CrashPlan PRO

This is a Docker container for CrashPlan PRO.

The GUI of the application is accessed through a modern web browser (no installation or configuration needed on client side) or via any VNC client.

IMPORTANT: This container can be used to migrate from CrashPlan for
. Make sure to read the
Migrating From CrashPlan for Home
section for more details.

CrashPlan offers the most comprehensive online backup solution to tens of
thousands of businesses around the world. The highly secure, automatic and
continuous service provides customers the peace of mind that their digital life
is protected and easily accessible.

Quick Start

Launch the CrashPlan PRO docker container with the following command:

docker run -d \
    --name=crashplan-pro \
    -p 5800:5800 \
    -v /docker/appdata/crashplan-pro:/config:rw \
    -v $HOME:/storage:ro \


  • /docker/appdata/crashplan-pro: This is where the application stores its configuration, log and any files needing persistency.
  • $HOME: This location contains files from your host that need to be accessible by the application.

Browse to http://your-host-ip:5800 to access the CrashPlan PRO GUI. Files from
the host appear under the /storage folder in the container.


docker run [-d] \
    --name=crashplan-pro \
    [-e <VARIABLE_NAME>=<VALUE>]... \
    [-p <HOST_PORT>:<CONTAINER_PORT>]... \
Parameter Description
-d Run the container in background. If not set, the container runs in foreground.
-e Pass an environment variable to the container. See the Environment Variables section for more details.
-v Set a volume mapping (allows to share a folder/file between the host and the container). See the Data Volumes section for more details.
-p Set a network port mapping (exposes an internal container port to the host). See the Ports section for more details.

Environment Variables

To customize some properties of the container, the following environment
variables can be passed via the -e parameter (one for each variable). Value
of this parameter has the format <VARIABLE_NAME>=<VALUE>.

Variable Description Default
USER_ID ID of the user the application runs as. See User/Group IDs to better understand when this should be set. 1000
GROUP_ID ID of the group the application runs as. See User/Group IDs to better understand when this should be set. 1000
SUP_GROUP_IDS Comma-separated list of supplementary group IDs of the application. (unset)
UMASK Mask that controls how file permissions are set for newly created files. The value of the mask is in octal notation. By default, this variable is not set and the default umask of 022 is used, meaning that newly created files are readable by everyone, but only writable by the owner. See the following online umask calculator: (unset)
TZ TimeZone of the container. Timezone can also be set by mapping /etc/localtime between the host and the container. Etc/UTC
KEEP_APP_RUNNING When set to 1, the application will be automatically restarted if it crashes or if user quits it. 0
APP_NICENESS Priority at which the application should run. A niceness value of -20 is the highest priority and 19 is the lowest priority. By default, niceness is not set, meaning that the default niceness of 0 is used. NOTE: A negative niceness (priority increase) requires additional permissions. In this case, the container should be run with the docker option --cap-add=SYS_NICE. (unset)
CLEAN_TMP_DIR When set to 1, all files in the /tmp directory are delete during the container startup. 1
DISPLAY_WIDTH Width (in pixels) of the application's window. 1280
DISPLAY_HEIGHT Height (in pixels) of the application's window. 768
SECURE_CONNECTION When set to 1, an encrypted connection is used to access the application's GUI (either via web browser or VNC client). See the Security section for more details. 0
VNC_PASSWORD Password needed to connect to the application's GUI. See the VNC Password section for more details. (unset)
X11VNC_EXTRA_OPTS Extra options to pass to the x11vnc server running in the Docker container. WARNING: For advanced users. Do not use unless you know what you are doing. (unset)
CRASHPLAN_SRV_MAX_MEM Maximum amount of memory the CrashPlan Engine is allowed to use. One of the following memory unit (case insensitive) should be added as a suffix to the size: G, M or K. By default, when this variable is not set, a maximum of 1024MB (1024M) of memory is allowed. (unset)

Data Volumes

The following table describes data volumes used by the container. The mappings
are set via the -v parameter. Each mapping is specified with the following

Container path Permissions Description
/config rw This is where the application stores its configuration, log and any files needing persistency.
/storage ro This location contains files from your host that need to be accessible by the application.


Here is the list of ports used by the container. They can be mapped to the host
via the -p parameter (one per port mapping). Each mapping is defined in the
following format: <HOST_PORT>:<CONTAINER_PORT>. The port number inside the
container cannot be changed, but you are free to use any port on the host side.

Port Mapping to host Description
5800 Mandatory Port used to access the application's GUI via the web interface.
5900 Optional Port used to access the application's GUI via the VNC protocol. Optional if no VNC client is used.

Docker Compose File

Here is an example of a docker-compose.yml file that can be used with
Docker Compose.

Make sure to adjust according to your needs. Note that only mandatory network
ports are part of the example.

version: '3'
    build: .
      - "5800:5800"
      - "/docker/appdata/crashplan-pro:/config:rw"
      - "$HOME:/storage:ro"

Docker Image Update

If the system on which the container runs doesn't provide a way to easily update
the Docker image, the following steps can be followed:

  1. Fetch the latest image:
    docker pull jlesage/crashplan-pro
  2. Stop the container:
    docker stop crashplan-pro
  3. Remove the container:
    docker rm crashplan-pro
  4. Start the container using the docker run command.

User/Group IDs

When using data volumes (-v flags), permissions issues can occur between the
host and the container. For example, the user within the container may not
exists on the host. This could prevent the host from properly accessing files
and folders on the shared volume.

To avoid any problem, you can specify the user the application should run as.

This is done by passing the user ID and group ID to the container via the
USER_ID and GROUP_ID environment variables.

To find the right IDs to use, issue the following command on the host, with the
user owning the data volume on the host:

id <username>

Which gives an output like this one:

uid=1000(myuser) gid=1000(myuser) groups=1000(myuser),4(adm),24(cdrom),27(sudo),46(plugdev),113(lpadmin)

The value of uid (user ID) and gid (group ID) are the ones that you should
be given the container.

Accessing the GUI

Assuming that container's ports are mapped to the same host's ports, the
graphical interface of the application can be accessed via:

  • A web browser:

    http://<HOST IP ADDR>:5800
  • Any VNC client:

    <HOST IP ADDR>:5900


By default, access to the application's GUI is done over an unencrypted
connection (HTTP or VNC).

Secure connection can be enabled via the SECURE_CONNECTION environment
variable. See the Environment Variables section for
more details on how to set an environment variable.

When enabled, application's GUI is performed over an HTTPs connection when
accessed with a browser. All HTTP accesses are automatically redirected to

When using a VNC client, the VNC connection is performed over SSL. Note that
few VNC clients support this method. [SSVNC] is one of them.


Here are the certificate files needed by the container. By default, when they
are missing, self-signed certificates are generated and used. All files have
PEM encoded, x509 certificates.

Container Path Purpose Content
/config/certs/vnc-server.pem VNC connection encryption. VNC server's private key and certificate, bundled with any root and intermediate certificates.
/config/certs/web-privkey.pem HTTPs connection encryption. Web server's private key.
/config/certs/web-fullchain.pem HTTPs connection encryption. Web server's certificate, bundled with any root and intermediate certificates.

NOTE: To prevent any certificate validity warnings/errors from the browser
or VNC client, make sure to supply your own valid certificates.

NOTE: Certificate files are monitored and relevant daemons are automatically
restarted when changes are detected.

VNC Password

To restrict access to your application, a password can be specified. This can
be done via two methods:

  • By using the VNC_PASSWORD environment variable.
  • By creating a .vncpass_clear file at the root of the /config volume.
    This file should contains the password in clear-text. During the container
    startup, content of the file is obfuscated and moved to .vncpass.

The level of security provided by the VNC password depends on two things:

  • The type of communication channel (encrypted/unencrypted).
  • How secure access to the host is.

When using a VNC password, it is highly desirable to enable the secure
connection to prevent sending the password in clear over an unencrypted channel.

ATTENTION: Password is limited to 8 characters. This limitation comes from
the Remote Framebuffer Protocol RFC (see
section 7.2.2). Any
characters beyhond the limit are ignored.

Taking Over Existing Backup

If this container is replacing a CrashPlan installation (from Linux, Windows,
MAC or another Docker container), your existing backup can be taken over to
avoid re-uploading all your data.

To proceed, make sure to carefully read the official documentation.

Here is a summary of what needs to be done:

  1. Start CrashPlan Docker container. Make sure the configuration directory
    is not mapped to a folder used by a different CrashPlan container.
  2. Sign in to your account.
  3. Click the Replace Existing button to start the wizard.
  4. Skip Step 2 - File Transfert.
  5. Once done with the wizard, go to your device's details and click
    Manage Files. You will probably see missing items in the file
    selection. This is normal, since path to your files may be different in
    the container.
  6. Update the file selection by re-adding your files. Do not unselect
    missing items yet
  7. Perform a backup. Because of deduplication, files will not be uploaded
  8. Once the backup is terminated, you can remove missing items if you
    don't care about file versions
    . Else, keep missing items.

Migrating From CrashPlan for Home

CrashPlan for Home being decommissioned, users using this version have the
choice to migrate their account to CrashPlan PRO (aka CrashPlan for Small
). Thus, using this container becomes a great choice for these

To perform the transition, you need to:

  • Migrate your account.
  • If CrashPlan for Home installation is provided by the jlesage/crashplan
    Docker container:
    • Keep the configuration directory used by jlesage/crashplan container
      (i.e. the host directory mapped to /config).
    • Run this container by re-using the same configuration directory. To do
      so, map the /config folder to the same host directory used by the
      jlesage/crashplan container.
  • Else, for all other installations (Windows, Linux, Mac, other Docker
    • Start this container, by making sure the configuration directory is
      mapped to a new, empty host directory.
    • Follow instructions detailed in the
      Taking Over Existing Backup section.


Crashes / Maximum Amount of Allocated Memory

If CrashPlan crashes unexpectedly with large backups, try to increase the
maximum amount of memory CrashPlan is allowed to use. This can be done by:

  1. Setting the CRASHPLAN_SRV_MAX_MEM environment variable. See the
    Environment Variables section for more details.
  2. Using the solution provided by CrashPlan from its support site.

Inotify's Watch Limit

If CrashPlan exceeds inotify's max watch limit, real-time file watching cannot
work properly and the inotify watch limit needs to be increased on the host.

For more details, see the CrashPlan's Linux real-time file watching errors

Empty /storage

If the /storage folder inside the container is empty:

  • Make sure the folder is properly mapped to the host. This is done via the
    -v parameter of the docker run command. See the Usage
  • Make sure permissions and ownership of files on the host are correct and are
    compatible with the user under which the container application is running
    (defined by the USER_ID and GROUP_ID environment variables). See the
    User/Group IDs section.

NOTE: If running the application as root (USER_ID=0 and GROUP_ID=0) makes
the files visible, it confirms that there is a permission issue.

First Sign In

When starting the container with a fresh/clean /config directory, the first
sign in can take a long time (few minutes) before the following error message

Unable to sign in. Unknown error.

If this situation occurs, just click the Continue button. The application
should then be able to successfully sign in.

This issue also exists with standard CrashPlan installation on Linux.

Support or Contact

Having troubles with the container or have questions? Please
create a new issue.

Docker Pull Command
Source Repository