oVirt Virtual Machine Infrastructure

The ovirt.vm-infra role manages the virtual machine infrastructure in oVirt. This role also creates inventory of created virtual machines it defines if wait_for_ip is set to true and state of virtual machine is running. All defined virtual machine are part of ovirt_vm inventory group. Role also create ovirt_tag_{tag_name} groups if there are any tags assigned to the virtual machine and place all virtual machine with that tag to that inventory group.

For example for following variable structure:

vms:
  - name: myvm1
    tag: mytag1
    profile: myprofile

  - name: myvm2
    tag: mytag2
    profile: myprofile

The role will create inventory groups ovirt_vm where will be both virtual machines myvm1 and myvm2. The role also create inventory groups ovirt_tag_mytag1 with virtual machine myvm1 and inventory group ovirt_tag_mytag2 with virtual machine myvm2.

Note

Please note that when installing this role from Ansible Galaxy you are instructed to run following command:

$ ansible-galaxy install ovirt.vm-infra

This will download the role to the directory with the same name as you specified on the command line, in this case ovirt.vm-infra. But note that it is case sensitive, so if you specify for example OVIRT.vm-infra it will download the same role, but it will add it to the directory named OVIRT.vm-infra, so you later always have to use this role with upper case prefix. So be careful how you specify the name of the role on command line.

For the RPM installation we install three legacy names ovirt.vm-infra, oVirt.vm-infra and ovirt-vm-infra. So you can use any of this name. This documentation and examples in this repository are using name ovirt.vm-infra. oVirt.vm-infra and ovirt-vm-infra role names are deprecated.

Requirements

• Ansible version 2.5 or higher
• Python SDK version 4.2 or higher

Limitations

• Does not support Ansible Check Mode (Dry Run).

Role Variables

Name	Default value
vms	UNDEF	List of dictionaries with virtual machine specifications.
affinity_groups	UNDEF	List of dictionaries with affinity groups specifications.
wait_for_ip	false	If true, the playbook should wait for the virtual machine IP reported by the guest agent.
wait_for_ip_version	v4	Specify which IP version should be wait for. Either v4 or v6.
wait_for_ip_range	0.0.0.0/0	Specify CIDR of virutal machine IP which should be reported. Works only for IPv4.
debug_vm_create	false	If true, logs the tasks of the virtual machine being created. The log can contain passwords.
vm_infra_create_single_timeout	180	Time in seconds to wait for VM to be created and started (if state is running).
vm_infra_create_poll_interval	15	Polling interval. Time in seconds to wait between check of state of VM.
vm_infra_create_all_timeout	vm_infra_create_single_timeout * (vms.length)	Total time to wait for all VMs to be created/started.
vm_infra_wait_for_ip_retries	5	Number of retries to check if VM is reporting it's IP address.
vm_infra_wait_for_ip_delay	5	Polling interval of IP address. Time in seconds to wait between check if VM reports IP address.

The vms and profile variables can contain following attributes, note that if you define same variable in both the value in vms has precendence:

Name	Default value
name	UNDEF	Name of the virtual machine to create.
tag	UNDEF	Name of the tag to assign to the virtual machine. Only administrator users can use this attribute.
cloud_init	UNDEF	Dictionary with values for Unix-like Virtual Machine initialization using cloud init. See below cloud_init section for more detailed description.
cloud_init_nics	UNDEF	List of dictionaries representing network interafaces to be setup by cloud init. See below cloud_init_nics section for more detailed description.
profile	UNDEF	Dictionary specifying the virtual machine hardware. See the table below.
state	present	Should the Virtual Machine be stopped, present or running. Takes precedence before state value in profile.
nics	UNDEF	List of dictionaries specifying the NICs of the virtual machine. See below for more detailed description.
cluster	UNDEF	Name of the cluster where the virtual machine will be created.
clone	No	If yes then the disks of the created virtual machine will be cloned and independent of the template. This parameter is used only when state is running or present and VM didn't exist before.
template	Blank	Name of template that the virtual machine should be based on.
template_version	UNDEF	Version number of the template to be used for VM. By default the latest available version of the template is used.
memory	UNDEF	Amount of virtual machine memory.
memory_max	UNDEF	Upper bound of virtual machine memory up to which memory hot-plug can be performed.
memory_guaranteed	UNDEF	Amount of minimal guaranteed memory of the Virtual Machine. Prefix uses IEC 60027-2 standard (for example 1GiB, 1024MiB). memory_guaranteed parameter can't be lower than memory parameter.
cores	UNDEF	Number of CPU cores used by the the virtual machine.
sockets	UNDEF	Number of virtual CPUs sockets of the Virtual Machine.
cpu_shares	UNDEF	Set a CPU shares for this Virtual Machine.
cpu_threads	UNDEF	Set a CPU threads for this Virtual Machine.
disks	UNDEF	List of dictionaries specifying the additional virtual machine disks. See below for more detailed description.
nics	UNDEF	List of dictionaries specifying the NICs of the virtual machine. See below for more detailed description.
custom_properties	UNDEF	Properties sent to VDSM to configure various hooks. Custom properties is a list of dictionary which can have following values: name - Name of the custom property. For example: hugepages, vhost, sap_agent, etc. regexp - Regular expression to set for custom property. value - Value to set for custom property.
high_availability	UNDEF	Whether or not the node should be set highly available.
high_availability_priority	UNDEF	Indicates the priority of the virtual machine inside the run and migration queues. Virtual machines with higher priorities will be started and migrated before virtual machines with lower priorities. The value is an integer between 0 and 100. The higher the value, the higher the priority. If no value is passed, default value is set by oVirt/RHV engine.
io_threads	UNDEF	Number of IO threads used by virtual machine. 0 means IO threading disabled.
description	UNDEF	Description of the Virtual Machine.
operating_system	UNDEF	Operating system of the Virtual Machine. For example: rhel_7x64
type	UNDEF	Type of the Virtual Machine. Possible values: desktop, server or high_performance
graphical_console	UNDEF	Assign graphical console to the virtual machine. Graphical console is a dictionary which can have following values: headless_mode - If true disable the graphics console for this virtual machine. protocol - 'VNC', 'Spice' or both.
storage_domain	UNDEF	Name of the storage domain where all virtual machine disks should be created. Considered only when template is provided.
state	present	Should the Virtual Machine be stopped, present or running.
ssh_key	UNDEF	SSH key to be deployed to the virtual machine. This is parameter is keep for backward compatibility and has precendece before authorized_ssh_keys in cloud_init dictionary.
domain	UNDEF	The domain of the virtual machine. This is parameter is keep for backward compatibility and has precendece before host_name in cloud_init dictionary.
lease	UNDEF	Name of the storage domain this virtual machine lease reside on.
root_password	UNDEF	The root password of the virtual machine. This is parameter is keep for backward compatibility and has precendece before root_password in cloud_init dictionary.
cpu_mode	UNDEF	CPU mode of the virtual machine. It can be some of the following: host_passthrough, host_model or custom.
placement_policy	UNDEF	The configuration of the virtual machine's placement policy.
boot_devices	UNDEF	List of boot devices which should be used to boot. Valid entries are cdrom, hd, network.
serial_console	UNDEF	True enable VirtIO serial console, False to disable it. By default is chosen by oVirt/RHV engine.
serial_policy	UNDEF	Specify a serial number policy for the Virtual Machine. Following options are supported. vm - Sets the Virtual Machine's UUID as its serial number. host - Sets the host's UUID as the Virtual Machine's serial number. custom - Allows you to specify a custom serial number in serial_policy_value.
serial_policy_value	UNDEF	Allows you to specify a custom serial number. This parameter is used only when serial_policy is custom.

The item in disks list of profile dictionary can contain following attributes:

Name	Default value
size	UNDEF	The size of the additional disk.
name	UNDEF	The name of the additional disk.
id	UNDEF	Id of the disk. If you pass id of the disk and name the disk will be looked up by id and will update name of the disk if it differs from the name passed in name parameter.
storage_domain	UNDEF	The name of storage domain where disk should be created.
interface	UNDEF	The interface of the disk.
name_prefix	True	If true the name of the vm will be used as prefix of disk name. If false only the name of disk will be used as disk name - could be useful when creating vm from template with custom disk size.
format	UNDEF	Specify format of the disk. cow - If set, the disk will by created as sparse disk, so space will be allocated for the volume as needed. This format is also known as thin provisioned disks raw - If set, disk space will be allocated right away. This format is also known as preallocated disks.
bootable	UNDEF	True if the disk should be bootable.
activate	UNDEF	True if the disk should be activated

The item in nics list of profile dictionary can contain following attributes:

Name	Default value
name	UNDEF	The name of the network interface.
interface	UNDEF	Type of the network interface.
mac_address	UNDEF	Custom MAC address of the network interface, by default it's obtained from MAC pool.
network	UNDEF	Logical network which the VM network interface should use. If network is not specified, then Empty network is used.
profile	UNDEF	Virtual network interface profile to be attached to VM network interface.

The affinity_groups list can contain following attributes:

Name	Default value
cluster	UNDEF (Required)	Name of the cluster of the affinity group.
description	UNDEF	Human readable description.
host_enforcing	false	true - VM cannot start on host if it does not satisfy the host_rule. false - VM will follow host_rule with soft enforcement.
host_rule	UNDEF	positive - VM's in this group must run on this host. negative - VM's in this group may not run on this host
hosts	UNDEF	List of host names assigned to this group.
name	UNDEF (Required)	Name of affinity group.
state	UNDEF	Whether group should be present or absent.
vm_enforcing	false	true - VM cannot start if it cannot satisfy the vm_rule. false - VM will follow vm_rule with soft enforcement.
vm_rule	UNDEF	positive - all vms in this group try to run on the same host. negative - all vms in this group try to run on separate hosts. disabled - this affinity group does not take effect.
vms	UNDEF	List of VM's to be assigned to this affinity group.
wait	true	If true, the module will wait for the desired state.

The cloud_init dictionary can contain following attributes:

Name	Description
host_name	Hostname to be set to Virtual Machine when deployed.
timezone	Timezone to be set to Virtual Machine when deployed.
user_name	Username to be used to set password to Virtual Machine when deployed.
root_password	Password to be set for user specified by user_name parameter. By default it's set for root user.
authorized_ssh_keys	Use this SSH keys to login to Virtual Machine.
regenerate_ssh_keys	If True SSH keys will be regenerated on Virtual Machine.
custom_script	Cloud-init script which will be executed on Virtual Machine when deployed. This is appended to the end of the cloud-init script generated by any other options.
dns_servers	DNS servers to be configured on Virtual Machine.
dns_search	DNS search domains to be configured on Virtual Machine.
nic_boot_protocol	Set boot protocol of the network interface of Virtual Machine. Can be one of none, dhcp or static.
nic_ip_address	If boot protocol is static, set this IP address to network interface of Virtual Machine.
nic_netmask	If boot protocol is static, set this netmask to network interface of Virtual Machine.
nic_gateway	If boot protocol is static, set this gateway to network interface of Virtual Machine.
nic_name	Set name to network interface of Virtual Machine.
nic_on_boot	If True network interface will be set to start on boot.

The cloud_init_nics List of dictionaries representing network interafaces to be setup by cloud init. This option is used, when user needs to setup more network interfaces via cloud init. If one network interface is enough, user should use cloud_init nic_* parameters. cloud_init nic_* parameters are merged with cloud_init_nics parameters. Dictionary can contain following values.

Name	Description
nic_boot_protocol	Set boot protocol of the network interface of Virtual Machine. Can be one of none, dhcp or static.
nic_ip_address	If boot protocol is static, set this IP address to network interface of Virtual Machine.
nic_netmask	If boot protocol is static, set this netmask to network interface of Virtual Machine.
nic_gateway	If boot protocol is static, set this gateway to network interface of Virtual Machine.
nic_name	Set name to network interface of Virtual Machine.
nic_on_boot	If True network interface will be set to start on boot.

Dependencies

None.

Example Playbook

---
- name: oVirt infra
  hosts: localhost
  connection: local
  gather_facts: false

  vars_files:
    # Contains encrypted `engine_password` varibale using ansible-vault
    - passwords.yml

  vars:
    engine_fqdn: ovirt-engine.example.com
    engine_user: admin@internal
    engine_cafile: /etc/pki/ovirt-engine/ca.pem

    httpd_vm:
      cluster: production
      domain: example.com
      template: rhel7
      memory: 2GiB
      cores: 2
      ssh_key: ssh-rsa AAA...LGx user@fqdn
      disks:
        - size: 10GiB
          name: data
          storage_domain: mynfsstorage
          interface: virtio

    db_vm:
      cluster: production
      domain: example.com
      template: rhel7
      memory: 4GiB
      cores: 1
      ssh_key: ssh-rsa AAA...LGx user@fqdn
      disks:
        - size: 50GiB
          name: data
          storage_domain: mynfsstorage
          interface: virtio
      nics:
        - name: ovirtmgmt
          network: ovirtmgmt
          profile: ovirtmgmt

    vms:
      - name: postgresql-vm-0
        tag: postgresql_vm
        profile: "{{ db_vm }}"
      - name: postgresql-vm-1
        tag: postgresql_vm
        profile: "{{ db_vm }}"
      - name: apache-vm
        tag: httpd_vm
        profile: "{{ httpd_vm }}"

    affinity_groups:
      - name: db-ag
        cluster: production
        vm_enforcing: true
        vm_rule: negative
        vms:
          - postgresql-vm-0
          - postgresql-vm-1

  roles:
    - ovirt.vm-infra

The example below shows how to use inventory created by ovirt.vm-infra role in follow up play.

---
- name: Deploy apache VM
  hosts: localhost
  connection: local
  gather_facts: false

  vars_files:
    # Contains encrypted `engine_password` varibale using ansible-vault
    - passwords.yml

  vars:
    wait_for_ip: true

    httpd_vm:
      cluster: production
      state: running
      domain: example.com
      template: rhel7
      memory: 2GiB
      cores: 2
      ssh_key: ssh-rsa AAA...LGx user@fqdn
      disks:
        - size: 10GiB
          name: data
          storage_domain: mynfsstorage
          interface: virtio

    vms:
      - name: apache-vm
        tag: apache
        profile: "{{ httpd_vm }}"

  roles:
    - ovirt.vm-infra

- name: Deploy apache on VM
  hosts: ovirt_tag_apache

  vars_files:
    - apache_vars.yml

  roles:
    - geerlingguy.apache

License

Apache License 2.0