Roles¶

Warning

This chapter is only for advanced users who need to modify the host configuration process significantly. Unless the configuration process doesn’t meet your requirements, you don’t need to be familiar with this part.

The following roles are shipped with the OpenNebula provision tool and installed into /usr/share/one/oneprovision/ansible/roles/.

Role ceph-opennebula-facts¶

This role is used to make ceph_oneadmin_key and ceph_oneadmin_keyring facts accessible for used on ceph-opennebula-osd

No parameters.

Role ceph-opennebula-mon¶

Creates OpenNebula Ceph pools

Parameter	Default	Description
`ceph_opennebula_mon_pools`	`{ name: one, pg_num: 128 }}`	Ceph pools definition
`ceph_opennebula_mon_tunables`	default	Crush tunables

Role ceph-opennebula-osd¶

Creates rbd client directories, configures libvirts secrets, disables Docker if installed by ceph-ansible.

Parameter	Default	Description
`ceph_opennebula_osd_libvirt_enabled`	true	Enables libvirt configuration (not used for LXC)

Role ceph-slice¶

Creates systemd ceph.slice which encapsulates all Ceph services so they can be later isolated from machine.slice to manage host resources.

No parameters.

Role ddc¶

This is a set of internal clean-up and check tasks. E.g. check if the target host operating system is supported, or network configuration cleanups.

No parameters.

Role frr¶

Installs FRR (https://frrouting.org/) and configured BGP EVPN extensions for VXLAN networks

To use this role you need to install netaddr Python library on the frontend, e.g.: pip install netaddr

Parameter	Default	Description
`frr_frrver`	frr-7	frr-stable will be the latest official stable release
`frr_rr_num`	1	Number of route reflectors in the cluster
`frr_iface`	`{{ ansible_default_ipv4.interface }}`	Network interface name to route VXLAN traffic
`frr_as`	65000	The AS number used for BGP
`frr_prefix_length`	16	Prefix length for the BGP network
`frr_zebra`	false	Configure Zebra
`frr_ipcalc`	false	Install and configure with ipcalc
`frr_net_mask`	20	Default netmask for ipcalc

Role iptables¶

Creates the basic set of IPv4 and IPv6 packet filter rules to ensure only the specified traffic is allowed. Masquerading (NAT) with IP port forwarding can be enabled.

Parameter	Default	Description
`iptables_ip_forward_enabled`	true	Enable IP forwarding
`iptables_manage_persistent`	true	Manage persistent configuration
`iptables_base_rules_enabled`	true	Create a set of base rules
`iptables_base_rules_interface`	NULL	Particular network interface to limit the base rules
`iptables_base_rules_strict`	true	Include the rules to drop any other traffic
`iptables_base_rules_services`	`[{protocol:'tcp',port:22}]`	List of whitelisted services
`iptables_masquerade_enabled`	false	Enable NAT
`iptables_masquerade_interface`	ansible_default_ipv4.interface	NAT output interface

Role opennebula-node-kvm¶

Installs the opennebula-node-kvm package, optionally configures the KVM module for the nested virtualization, and ensures libvirt is enabled and running.

Parameter	Default	Description
`opennebula_node_kvm_use_ev`	False	Whether to use the EV package for KVM
`opennebula_node_kvm_param_nested`	False	Enable nested KVM virtualization
`opennebula_node_kvm_manage_kvm`	True	Enable KVM configuration
`opennebula_node_kvm_rhev_repo`	True	Name of Red Hat EV repository
`opennebula_node_selinux_booleans`	`virt_use_nfs`	SELinux booleans to configure

Role opennebula-node-lxc¶

Installs the opennebula-node-lxc package.

No parameters.

Role opennebula-repository¶

Configures the OpenNebula package repository for the particular version.

Parameter	Default	Description
`opennebula_repository_version`	6.4	OpenNebula repository version
`opennebula_repository_base`	`https://downloads.opennebula.io/repo/` `{{ opennebula_repository_version }}`	Repository of the OpenNebula packages
`opennebula_repository_gpgcheck`	yes	Enable GPG check for the packages
`opennebula_repository_repo_gpgcheck`	yes	Enable GPG check for the repos (RHEL/AlmaLinux only)

Role opennebula-ssh¶

Handles the SSH configuration and SSH keys distribution on the OpenNebula front-end/hosts.

Parameter	Default	Description
`opennebula_ssh_manage_sshd`	True	Manage SSH server configuration
`opennebula_ssh_sshd_passwordauthentication`	no	SSH server option for Password Authentication
`opennebula_ssh_sshd_permitrootlogin`	`without-password`	SSH server option for PermitRootLogin
`opennebula_ssh_deploy_local`	True	Deploy local oneadmin’s SSH key to remote host