This page will show you the specific considerations at the time of using an OpenNebula cloud, according to the different supported platforms.
This is the list of the individual platform components that have been through the complete OpenNebula Quality Assurance and Certification Process.
Certified Components Version¶
|RedHat Enterprise Linux||7, 8||Front-End Installation|
|CentOS||7, 8||Front-End Installation|
|Ubuntu Server||16.04 (LTS), 18.04 (LTS), 19.04, 19.10||Front-End Installation|
|Debian||9, 10||Front-End Installation|
|MariaDB or MySQL||Version included in the Linux distribution||MySQL Setup|
|SQLite||Version included in the Linux distribution||Default DB, no configuration needed|
|Ruby Gems||Versions installed by packages or install_gems utility||front-end installation|
|Corosync+Pacemaker||Version included in the Linux distribution||Front-end HA Setup|
|vCenter||6.0/6.5/6,7, managing ESX 6.0/6.5/6.7||vCenter Node Installation|
|NSX-T||2.4.1+||VMware compatiblity. NSX Documentation.|
|NSX-V||6.4.5+||VMware compatiblity. NSX Documentation|
|RedHat Enterprise Linux||7, 8||KVM Driver|
|CentOS||7, 8||KVM Driver|
|Ubuntu Server||16.04 (LTS), 18.04 (LTS), 19.04, 19.10||KVM Driver|
|Debian||9, 10||KVM Driver|
|KVM/Libvirt||Support for version included in the Linux distribution.
For CentOS/RedHat the packages from
||KVM Node Installation|
|Ubuntu Server||16.04 (LTS), 18.04 (LTS), 19.04, 19.10||LXD Driver|
|LXD||Support for LXD = 3.0.x either snap or system package||LXD Node Installation|
Linux Contextualization Packages¶
|Amazon Linux||2||Linux Contextualization Packages|
|CentOS||6, 7, 8||Linux Contextualization Packages|
|Red Hat Enterprise Linux||7, 8||Linux Contextualization Packages|
|Fedora||29, 30||Linux Contextualization Packages|
|openSUSE||15, Tumbleweed||Linux Contextualization Packages|
|SUSE Linux Enterprise Server||12 SP3||Linux Contextualization Packages|
|Debian||8, 9, 10||Linux Contextualization Packages|
|Devuan||2||Linux Contextualization Packages|
|Ubuntu||14.04, 16.04, 18.04, 19.04||Linux Contextualization Packages|
|Alpine Linux||3.8, 3.9, 3.10||Linux Contextualization Packages|
|FreeBSD||11.3, 12.0||Linux Contextualization Packages|
Windows Contextualization Packages¶
|Windows||7+||Windows Contextualization Packages|
|Windows Server||2008+||Windows Contextualization Packages|
Open Cloud Networking Infrastructure¶
|ebtables||Version included in the Linux distribution||Ebtables|
|8021q kernel module||Version included in the Linux distribution||802.1Q VLAN|
|Open vSwitch||Version included in the Linux distribution||Open vSwitch|
|iproute2||Version included in the Linux distribution||VXLAN|
Open Cloud Storage Infrastructure¶
|iSCSI||Version included in the Linux distribution||LVM Drivers|
|LVM2||Version included in the Linux distribution||LVM Drivers|
|Ceph||Jewel v10.2.x, Luminous v12.2.x, Mimic v13.2.x, Nautilus v14.2.x||The Ceph Datastore|
|net-ldap ruby library||0.12.1 or 0.16.1||LDAP Authentication|
|openssl||Version included in the Linux distribution||x509 Authentication|
|aws-sdk||2.11.330||Amazon EC2 Driver|
|Appliance OS||Ubuntu 16.04|
|Chrome||61.0 - 67.0|
|Firefox||59.0 - 61.0|
For Windows desktops using Chrome or Firefox you should disable the option
touch-events of your browser:
Chrome: chrome://flags -> #touch-events: disabled. Firefox: about:config -> dom.w3c_touch_events: disabled.
Internet Explorer is not supported with the Compatibility Mode enabled, since it emulates IE7 which is not supported.
VMware Cloud on AWS¶
OpenNebula has been validated and is supported on VMware Cloud on AWS. Customers can contact the support team through the commercial support portal to know specific configuration and limitations.
Generally for all Linux platforms, it is worth noting that Ruby gems should be used from packages shipped with OpenNebula or installed with the install_gems utility. Avoid using Ruby gems versions shipped with your platform.
Certified Infrastructure Scale¶
A single instance of OpenNebula (ie, a single
oned process) has been stress tested to cope with 500 hypervisors without performance degradation. This is the maximum recommended configuration for a single instance, and depending on the underlying configuration of storage and networking mainly, it is recommended to switch to a federated scenario for any larger number of hypervisors.
However, there are several OpenNebula users managing significant higher numbers of hypervisors (on the order of two thousand) with a single instance. This largely depends, as mentioned, on the storage, networking and also monitoring configuration.
Frontend Platform Notes¶
The following applies to all Front-Ends:
- XML-RPC tuning parameters (
TIMEOUT) are only available with packages distributed by us, as they are compiled with a newer xmlrpc-c library.
- Only Ruby versions >= 2.0 are supported.
Ubuntu 16.04 Platform Notes¶
By default it comes with LXD 2. LXD 3 should be installed from xenial-backports. Make sure you have backports enabled in sources.list
apt-get -t xenial-backports install lxd
Resizing ext4 filesystems of LXD containers will fail due to the outdated
CentOS 7.0 Platform Notes¶
When using Apache to serve Sunstone, it is required that you disable or comment the
PrivateTMP=yes directive in
There is an automatic job that removes all data from
/var/tmp/. In order to disable this, please edit the
/usr/lib/tmpfiles.d/tmp.conf and remove the line that removes
There is a bug in libvirt that the prevents the use of the save/restore mechanism if
cpu_model is set to
RAW. The work around if needed is described in this issue.
Make sure that the packages
treetop are not installed before running
ìnstall_gems, as the version of
treetop that comes packaged in Debian 8 is incompatible with OpenNebula. OneFlow requires a version >= 1.6.3 for treetop, packages distributed with Debian 8 includes an older version (1.4.5).
Nodes Platform Notes¶
The following items apply to all distributions:
- Since OpenNebula 4.14 there is a new monitoring probe that gets
information about PCI devices. By default it retrieves all the PCI
devices in a host. To limit the PCI devices for which it gets info and appear in
onehost showrefer to PCI Passthrough.
- When using qcow2 storage drivers you can make sure that the data is written to disk when doing snapshots setting the
writethrough. This change will make writes slower than other cache modes but safer. To do this edit the file
/etc/one/vmm_exec/vmm_exec_kvm.confand change the line for
DISK = [ driver = "qcow2", cache = "writethrough" ]
CentOS/RedHat 7 Platform Notes¶
In order to install Ruby dependencies on RHEL, the Server Optional channel needs to be enabled. Please refer to RedHat documentation to enable the channel.
Alternatively, use CentOS 7 repositories to install Ruby dependencies.
The libvirt/QEMU packages used in the testing infrastructure are the ones in the
qemu-ev repository. To add this repository on CentOS, you can install the following packages:
yum install centos-release-qemu-ev yum install qemu-kvm-ev
Disable PolicyKit for Libvirt¶
It is recommended that you disable PolicyKit for Libvirt:
$ cat /etc/libvirt/libvirtd.conf ... auth_unix_ro = "none" auth_unix_rw = "none" unix_sock_group = "oneadmin" unix_sock_ro_perms = "0770" unix_sock_rw_perms = "0770" ...