OpenNebula Services Configuration on

Overview

Mon, 17 Feb 2025 00:00:00 +0000

This chapter is a configuration and deployment reference for all OpenNebula services. It contains the description of the configuration files (for least effort, basic and even advanced setups), how to stop and start them, and where to find their logs.

How Should I Read This Chapter

Read the sections for services you are interested in

Move on to Database Maintenance and Troubleshooting.

Users of Enterprise Edition might find Support Utilities useful, which generates support bundles with detailed information about the cloud environment of the customer. The bundles help OpenNebula Customer Care to provide better support responses.

OpenNebula Configuration

Mon, 17 Feb 2025 00:00:00 +0000

The OpenNebula Daemon (oned) is the core service of the cloud management platform. It manages the cluster nodes, Virtual Networks and storages, groups, users and their Virtual Machines, and provides the XML-RPC API to other services and end users. The service is distributed as an operating system package opennebula with system service opennebula.

Configuration

The OpenNebula Daemon configuration file can be found in /etc/one/oned.conf on the Front-end, and can be customized with the parameters listed in the table below.

FireEdge Configuration

Mon, 17 Feb 2025 00:00:00 +0000

The OpenNebula FireEdge server provides a next-generation web-management interface for remote OpenNebula Cluster provisioning as well as additional functionality to Sunstone. It’s a dedicated daemon installed by default as part of the Single Front-end Installation, but can be deployed independently on a different machine. The server is distributed as an operating system package opennebula-fireedge with the system service opennebula-fireedge.

Main Features

Guacamole Proxy for Sunstone to remotely access the VMs (incl., VNC, RDP, and SSH)
FireEdge Sunstone: new iteration of Sunstone written in React/Redux. Accessible through the following URL:

http://<OPENNEBULA-FRONTEND>:2616

OneFlow Configuration

Mon, 17 Feb 2025 00:00:00 +0000

OneFlow orchestrates multi-VM services as a whole, interacts with the OpenNebula Daemon to manage the Virtual Machines (starts, stops), and can be controlled via the Sunstone GUI or over CLI. It’s a dedicated daemon installed by default as part of the Single Front-end Installation, but can be deployed independently on a different machine. The server is distributed as an operating system package opennebula-flow with the system service opennebula-flow.

OneGate Configuration

Mon, 17 Feb 2025 00:00:00 +0000

The OneGate server allows Virtual Machines to pull and push information from/to OpenNebula. It can be used with both the KVM and LXC hypervisors if the guest operating system has preinstalled the OpenNebula contextualization package. It’s a dedicated daemon installed by default as part of the Single Front-end Installation, but can be deployed independently on a different machine. The server is distributed as an operating system package opennebula-gate with the system service opennebula-gate.

Database Maintenance

Mon, 17 Feb 2025 00:00:00 +0000

OpenNebula persists the state of the cloud into the selected SQL database. The database should be monitored and tuned for the best performance by cloud administrators following the best practices of the particular database product. In this guide, we provide a few tips on how to optimize the database for OpenNebula and thoroughly describe OpenNebula’s database maintenance tool onedb, which simplifies the most common database operations - backups and restores, version upgrades, or consistency checks.

Troubleshooting

Mon, 17 Feb 2025 00:00:00 +0000

Logging

Every OpenNebula server generates logs with a configurable verbosity (level of detail) and through different means (file, syslog, or standard error output) to allow cloud administrators to troubleshoot the potential problems. Logs are stored in /var/log/one/ on a Front-end Host with a particular component. Some valuable error messages can be also seen by the end users in CLI tools or the Sunstone GUI.

Configure Logging System

Follow the guides of each component to find the logs’ location and configuration of log verbosity:

OneForm Configuration

Tue, 03 Jun 2025 00:00:00 +0000

OpenNebula Form, also known as OneForm, is the hybrid provisioning engine for OpenNebula, responsible for automating the deployment, scaling, and configuration of edge and cloud infrastructure using Terraform and Ansible. It is delivered as a standalone service and interacts with the core OpenNebula services to register compute Hosts, Virtual Networks, and storage resources as part of a Provision lifecycle.

OneForm is installed by default as part of the standard OpenNebula package set and runs as a systemd service named opennebula-form. It can also be deployed independently on a separate Host if needed.