System Requirements

To install CycleCloud, you must have administrator rights. In addition, your system needs to meet the following minimum requirements:

  • A 32-bit or 64-bit Linux distribution or Windows Server 2008 or newer
  • Java Runtime Environment (version 8 or higher)
  • At least 8GB of RAM
  • Two or more CPU cores
  • At least 50GB of free disk space
  • Administrator (root) privileges

A Note on Names

It is worth noting that the names CycleCloud and CycleServer are sometimes used interchangeably, but this confuses the distinction between them. CycleServer is the platform that underlies CycleCloud. It handles data storage, plugin management, logging, monitoring, and alerting among other functions. CycleCloud is a plugin to CycleServer, which manages the creation of clusters across multiple cloud providers. While CycleCloud is the official name of the product, you will find CycleServer referenced in many commands and directory names.

Installing CycleCloud

To begin the installation, unpack the CycleCloud installation to a temporary working directory. On Windows, this must be a local disk.

From the local directory, run (on Linux) or install.cmd (on Windows) to begin the installation process. On Linux, the default install location is /opt/cycle_server. On Windows, only C:Program FilesCycleServer is currently supported.

On Linux systems, the script supports several options for customization:

Option Definition
--batch Install without any prompts
--installdir Install to a directory other than /opt/cycle_server
--force Install to the specified directory even if it is not empty
--nostart Do not start the processes after the installation is complete


You must have write permission to the /opt directory. The CycleCloud installer will create a cycle_server user and unix group, install into the /opt/cycle_server directory by default, and assign cycle_server:cycle_server ownership to the directory.

Once the installer has finished running, you will be provided a link to complete the installation from your browser. Copy the link provided into your web browser. Further configuration is discussed in the Configuration section.

Notes on Security

The default installation of CycleCloud uses non-encrypted HTTP running on port 8080. We strongly recommend configuring SSL for all installations. SSL configuration information can be found in the Installation Guide.

Do not install CycleCloud on a shared drive, or any drive in which non-admin users have access. For Linux installations, anyone with access to the CycleCloud group will gain access to unencrypted data. We recommend that non-admin users not be added to this group.

Upgrading CycleCloud

To upgrade an existing CycleCloud installation, save the install bundle to the server’s local drive. The upgrade script will unpack the bundle and install the new package. On Linux, the upgrade script is $CS_HOME/util/ On Windows, the upgrade script is C:Program FilesCycleServerutilupgrade.cmd. Both scripts take the path to the install bundle as an argument. For example:

/opt/cycle_server/util/ /tmp/cyclecloud-6.6.0.tar.gz

To upgrade the cyclecloud command line tool, copy the new binary over the old. In most cases, upgrades within a release series (e.g. 5.x) do not typically require CLI upgrades.


As of version 6.6.0, Java Runtime Environment is no longer packaged in the installation. JRE version 8 or higher is required.

Installing Multiple Instances of CycleCloud on the Same Machine


This section is applicable to Linux installations only.

Running multiple instances of CycleCloud on the same machine is supported, but requires some slight modifications to the configuration files before starting CycleCloud for the first time. During the install step, make sure to use the --nostart flag to keep the server from starting, and the --installdir flag to specify an alternate install directory. For example:

./ --nostart --installdir /mnt/second_cycle_server

After the installer finishes, edit $CS_HOME/config/ and change the following port numbers to an unused port (incrementing each default port number by one usually works well):








Next, edit $CS_HOME/data/ and modify derby.drda.portNumber so that it matches the port specified in the url= line of

Finally, copy /etc/init.d/cycle_server to a new file and edit the CS_HOME path to point to the new CycleServer install, then start CycleServer using the new init script.


After CycleCloud is installed, it is configured through your web browser. The login screen will load after the webserver has fully initialized, which can take several minutes.

Initial Setup

Step 1: Welcome

Enter a Site Name, your CycleComputing Account ID, and Password, then click Next.

Step 2: License Agreement

Accept the license agreement and click Next.

Step 3: Administrator Account

At this step in the process, you will set up the local administrator account for CycleCloud. This account is used to administer the CycleCloud application – it is NOT an operating system account. Enter a user ID and password, then click Done to continue. For the remainder of this guide, we assume the account’s user ID is “admin”.


All CycleCloud account passwords must be between 8 and 123 characters long, and meet at least 3 of the following 4 conditions:

  • Contain at least one upper case letter
  • Contain at least one lower case letter
  • Contain at least one number
  • Contain at least one special character: @ # $ % ^ & * – _ ! + = [ ] { } | : ‘ , . ? ` ~ ” ( ) ;


CycleCloud will check for existing licenses using the Cycle Computing Portal credentials you provided in Step 1. If a license is found for the internally-generated Node ID of your installation, the license will be installed automatically. If a license has not been assigned to this instance, you will be presented with a list of your available licenses. Click Claim to select the desired license and it will be installed automatically.

If there are no available licenses associated with your Cycle Computing Portal credentials, please contact your sales representative. If you need to manually enter a license (for example, if your CycleCloud installation is in an air-gapped environment), your sales representative will send an email with a license. Copy the license string from the email and paste it into the form. Click Install License to continue.

You will see confirmation that the license has been successfully installed.