add template quemu.conf

tasks/main.yml

@@ -9,6 +9,7 @@
           - dmidecode
           - dnsmasq
           - qemu-headless
+          - ovmf
           # To create virtual machines
   become: yes
   notify: Enable and start libvirt services
@@ -27,7 +28,11 @@
     replace: 'hosts: files libvirt '
   become: yes
 
-
+- name: apply qemu.conf
+  template:
+    dest: /etc/libvirt # required. Location to render the template to on the remote machine.
+    src: qemu.conf.j2 # required. Path of a Jinja2 formatted template on the Ansible controller. This can be a relative or absolute path.
+  become: yes
 - debug:
     msg: "{{ ansible_default_ipv4.type }}"
 

templates/qemu.conf.j2

@@ -0,0 +1,816 @@
+# Master configuration file for the QEMU driver.
+# All settings described here are optional - if omitted, sensible
+# defaults are used.
+
+# Use of TLS requires that x509 certificates be issued. The default is
+# to keep them in /etc/pki/qemu. This directory must contain
+#
+#  ca-cert.pem - the CA master certificate
+#  server-cert.pem - the server certificate signed with ca-cert.pem
+#  server-key.pem  - the server private key
+#
+# and optionally may contain
+#
+#  dh-params.pem - the DH params configuration file
+#
+# If the directory does not exist, libvirtd will fail to start. If the
+# directory doesn't contain the necessary files, QEMU domains will fail
+# to start if they are configured to use TLS.
+#
+# In order to overwrite the default path alter the following. This path
+# definition will be used as the default path for other *_tls_x509_cert_dir
+# configuration settings if their default path does not exist or is not
+# specifically set.
+#
+#default_tls_x509_cert_dir = "/etc/pki/qemu"
+
+
+# The default TLS configuration only uses certificates for the server
+# allowing the client to verify the server's identity and establish
+# an encrypted channel.
+#
+# It is possible to use x509 certificates for authentication too, by
+# issuing an x509 certificate to every client who needs to connect.
+#
+# Enabling this option will reject any client who does not have a
+# certificate signed by the CA in /etc/pki/qemu/ca-cert.pem
+#
+# The default_tls_x509_cert_dir directory must also contain
+#
+#  client-cert.pem - the client certificate signed with the ca-cert.pem
+#  client-key.pem - the client private key
+#
+#default_tls_x509_verify = 1
+
+#
+# Libvirt assumes the server-key.pem file is unencrypted by default.
+# To use an encrypted server-key.pem file, the password to decrypt
+# the PEM file is required. This can be provided by creating a secret
+# object in libvirt and then to uncomment this setting to set the UUID
+# of the secret.
+#
+# NB This default all-zeros UUID will not work. Replace it with the
+# output from the UUID for the TLS secret from a 'virsh secret-list'
+# command and then uncomment the entry
+#
+#default_tls_x509_secret_uuid = "00000000-0000-0000-0000-000000000000"
+
+
+# VNC is configured to listen on 127.0.0.1 by default.
+# To make it listen on all public interfaces, uncomment
+# this next option.
+#
+# NB, strong recommendation to enable TLS + x509 certificate
+# verification when allowing public access
+#
+#vnc_listen = "0.0.0.0"
+
+# Enable this option to have VNC served over an automatically created
+# unix socket. This prevents unprivileged access from users on the
+# host machine, though most VNC clients do not support it.
+#
+# This will only be enabled for VNC configurations that have listen
+# type=address but without any address specified. This setting takes
+# preference over vnc_listen.
+#
+#vnc_auto_unix_socket = 1
+
+# Enable use of TLS encryption on the VNC server. This requires
+# a VNC client which supports the VeNCrypt protocol extension.
+# Examples include vinagre, virt-viewer, virt-manager and vencrypt
+# itself. UltraVNC, RealVNC, TightVNC do not support this
+#
+# It is necessary to setup CA and issue a server certificate
+# before enabling this.
+#
+#vnc_tls = 1
+
+
+# In order to override the default TLS certificate location for
+# vnc certificates, supply a valid path to the certificate directory.
+# If the provided path does not exist, libvirtd will fail to start.
+# If the path is not provided, but vnc_tls = 1, then the
+# default_tls_x509_cert_dir path will be used.
+#
+#vnc_tls_x509_cert_dir = "/etc/pki/libvirt-vnc"
+
+
+# Uncomment and use the following option to override the default secret
+# UUID provided in the default_tls_x509_secret_uuid parameter.
+#
+#vnc_tls_x509_secret_uuid = "00000000-0000-0000-0000-000000000000"
+
+
+# The default TLS configuration only uses certificates for the server
+# allowing the client to verify the server's identity and establish
+# an encrypted channel.
+#
+# It is possible to use x509 certificates for authentication too, by
+# issuing an x509 certificate to every client who needs to connect.
+#
+# Enabling this option will reject any client that does not have a
+# ca-cert.pem certificate signed by the CA in the vnc_tls_x509_cert_dir
+# (or default_tls_x509_cert_dir) as well as the corresponding client-*.pem
+# files described in default_tls_x509_cert_dir.
+#
+# If this option is not supplied, it will be set to the value of
+# "default_tls_x509_verify".
+#
+#vnc_tls_x509_verify = 1
+
+
+# The default VNC password. Only 8 bytes are significant for
+# VNC passwords. This parameter is only used if the per-domain
+# XML config does not already provide a password. To allow
+# access without passwords, leave this commented out. An empty
+# string will still enable passwords, but be rejected by QEMU,
+# effectively preventing any use of VNC. Obviously change this
+# example here before you set this.
+#
+#vnc_password = "XYZ12345"
+
+
+# Enable use of SASL encryption on the VNC server. This requires
+# a VNC client which supports the SASL protocol extension.
+# Examples include vinagre, virt-viewer and virt-manager
+# itself. UltraVNC, RealVNC, TightVNC do not support this
+#
+# It is necessary to configure /etc/sasl2/qemu.conf to choose
+# the desired SASL plugin (eg, GSSPI for Kerberos)
+#
+#vnc_sasl = 1
+
+
+# The default SASL configuration file is located in /etc/sasl2/
+# When running libvirtd unprivileged, it may be desirable to
+# override the configs in this location. Set this parameter to
+# point to the directory, and create a qemu.conf in that location
+#
+#vnc_sasl_dir = "/some/directory/sasl2"
+
+
+# QEMU implements an extension for providing audio over a VNC connection,
+# though if your VNC client does not support it, your only chance for getting
+# sound output is through regular audio backends. By default, libvirt will
+# disable all QEMU sound backends if using VNC, since they can cause
+# permissions issues. Enabling this option will make libvirtd honor the
+# QEMU_AUDIO_DRV environment variable when using VNC.
+#
+#vnc_allow_host_audio = 0
+
+
+
+# SPICE is configured to listen on 127.0.0.1 by default.
+# To make it listen on all public interfaces, uncomment
+# this next option.
+#
+# NB, strong recommendation to enable TLS + x509 certificate
+# verification when allowing public access
+#
+#spice_listen = "0.0.0.0"
+
+
+# Enable use of TLS encryption on the SPICE server.
+#
+# It is necessary to setup CA and issue a server certificate
+# before enabling this.
+#
+#spice_tls = 1
+
+
+# In order to override the default TLS certificate location for
+# spice certificates, supply a valid path to the certificate directory.
+# If the provided path does not exist, libvirtd will fail to start.
+# If the path is not provided, but spice_tls = 1, then the
+# default_tls_x509_cert_dir path will be used.
+#
+#spice_tls_x509_cert_dir = "/etc/pki/libvirt-spice"
+
+
+# Enable this option to have SPICE served over an automatically created
+# unix socket. This prevents unprivileged access from users on the
+# host machine.
+#
+# This will only be enabled for SPICE configurations that have listen
+# type=address but without any address specified. This setting takes
+# preference over spice_listen.
+#
+#spice_auto_unix_socket = 1
+
+
+# The default SPICE password. This parameter is only used if the
+# per-domain XML config does not already provide a password. To
+# allow access without passwords, leave this commented out. An
+# empty string will still enable passwords, but be rejected by
+# QEMU, effectively preventing any use of SPICE. Obviously change
+# this example here before you set this.
+#
+#spice_password = "XYZ12345"
+
+
+# Enable use of SASL encryption on the SPICE server. This requires
+# a SPICE client which supports the SASL protocol extension.
+#
+# It is necessary to configure /etc/sasl2/qemu.conf to choose
+# the desired SASL plugin (eg, GSSPI for Kerberos)
+#
+#spice_sasl = 1
+
+# The default SASL configuration file is located in /etc/sasl2/
+# When running libvirtd unprivileged, it may be desirable to
+# override the configs in this location. Set this parameter to
+# point to the directory, and create a qemu.conf in that location
+#
+#spice_sasl_dir = "/some/directory/sasl2"
+
+# Enable use of TLS encryption on the chardev TCP transports.
+#
+# It is necessary to setup CA and issue a server certificate
+# before enabling this.
+#
+#chardev_tls = 1
+
+
+# In order to override the default TLS certificate location for character
+# device TCP certificates, supply a valid path to the certificate directory.
+# If the provided path does not exist, libvirtd will fail to start.
+# If the path is not provided, but chardev_tls = 1, then the
+# default_tls_x509_cert_dir path will be used.
+#
+#chardev_tls_x509_cert_dir = "/etc/pki/libvirt-chardev"
+
+
+# The default TLS configuration only uses certificates for the server
+# allowing the client to verify the server's identity and establish
+# an encrypted channel.
+#
+# It is possible to use x509 certificates for authentication too, by
+# issuing an x509 certificate to every client who needs to connect.
+#
+# Enabling this option will reject any client that does not have a
+# ca-cert.pem certificate signed by the CA in the chardev_tls_x509_cert_dir
+# (or default_tls_x509_cert_dir) as well as the corresponding client-*.pem
+# files described in default_tls_x509_cert_dir.
+#
+# If this option is not supplied, it will be set to the value of
+# "default_tls_x509_verify".
+#
+#chardev_tls_x509_verify = 1
+
+
+# Uncomment and use the following option to override the default secret
+# UUID provided in the default_tls_x509_secret_uuid parameter.
+#
+# NB This default all-zeros UUID will not work. Replace it with the
+# output from the UUID for the TLS secret from a 'virsh secret-list'
+# command and then uncomment the entry
+#
+#chardev_tls_x509_secret_uuid = "00000000-0000-0000-0000-000000000000"
+
+
+# Enable use of TLS encryption for all VxHS network block devices that
+# don't specifically disable.
+#
+# When the VxHS network block device server is set up appropriately,
+# x509 certificates are required for authentication between the clients
+# (qemu processes) and the remote VxHS server.
+#
+# It is necessary to setup CA and issue the client certificate before
+# enabling this.
+#
+#vxhs_tls = 1
+
+
+# In order to override the default TLS certificate location for VxHS
+# backed storage, supply a valid path to the certificate directory.
+# This is used to authenticate the VxHS block device clients to the VxHS
+# server.
+#
+# If the provided path does not exist, libvirtd will fail to start.
+# If the path is not provided, but vxhs_tls = 1, then the
+# default_tls_x509_cert_dir path will be used.
+#
+# VxHS block device clients expect the client certificate and key to be
+# present in the certificate directory along with the CA master certificate.
+# If using the default environment, default_tls_x509_verify must be configured.
+# Since this is only a client the server-key.pem certificate is not needed.
+# Thus a VxHS directory must contain the following:
+#
+#  ca-cert.pem - the CA master certificate
+#  client-cert.pem - the client certificate signed with the ca-cert.pem
+#  client-key.pem - the client private key
+#
+#vxhs_tls_x509_cert_dir = "/etc/pki/libvirt-vxhs"
+
+
+
+# Enable use of TLS encryption for all NBD disk devices that don't
+# specifically disable it.
+#
+# When the NBD server is set up appropriately, x509 certificates are required
+# for authentication between the client and the remote NBD server.
+#
+# It is necessary to setup CA and issue the client certificate before
+# enabling this.
+#
+#nbd_tls = 1
+
+
+# In order to override the default TLS certificate location for NBD
+# backed storage, supply a valid path to the certificate directory.
+# This is used to authenticate the NBD block device clients to the NBD
+# server.
+#
+# If the provided path does not exist, libvirtd will fail to start.
+# If the path is not provided, but nbd_tls = 1, then the
+# default_tls_x509_cert_dir path will be used.
+#
+# NBD block device clients expect the client certificate and key to be
+# present in the certificate directory along with the CA certificate.
+# Since this is only a client the server-key.pem certificate is not needed.
+# Thus a NBD directory must contain the following:
+#
+#  ca-cert.pem - the CA master certificate
+#  client-cert.pem - the client certificate signed with the ca-cert.pem
+#  client-key.pem - the client private key
+#
+#nbd_tls_x509_cert_dir = "/etc/pki/libvirt-nbd"
+
+
+# In order to override the default TLS certificate location for migration
+# certificates, supply a valid path to the certificate directory. If the
+# provided path does not exist, libvirtd will fail to start. If the path is
+# not provided, but migrate_tls = 1, then the default_tls_x509_cert_dir path
+# will be used. Once/if a default certificate is enabled/defined, migration
+# will then be able to use the certificate via migration API flags.
+#
+#migrate_tls_x509_cert_dir = "/etc/pki/libvirt-migrate"
+
+
+# The default TLS configuration only uses certificates for the server
+# allowing the client to verify the server's identity and establish
+# an encrypted channel.
+#
+# It is possible to use x509 certificates for authentication too, by
+# issuing an x509 certificate to every client who needs to connect.
+#
+# Enabling this option will reject any client that does not have a
+# ca-cert.pem certificate signed by the CA in the migrate_tls_x509_cert_dir
+# (or default_tls_x509_cert_dir) as well as the corresponding client-*.pem
+# files described in default_tls_x509_cert_dir.
+#
+# If this option is not supplied, it will be set to the value of
+# "default_tls_x509_verify".
+#
+#migrate_tls_x509_verify = 1
+
+
+# Uncomment and use the following option to override the default secret
+# UUID provided in the default_tls_x509_secret_uuid parameter.
+#
+# NB This default all-zeros UUID will not work. Replace it with the
+# output from the UUID for the TLS secret from a 'virsh secret-list'
+# command and then uncomment the entry
+#
+#migrate_tls_x509_secret_uuid = "00000000-0000-0000-0000-000000000000"
+
+
+# By default, if no graphical front end is configured, libvirt will disable
+# QEMU audio output since directly talking to alsa/pulseaudio may not work
+# with various security settings. If you know what you're doing, enable
+# the setting below and libvirt will passthrough the QEMU_AUDIO_DRV
+# environment variable when using nographics.
+#
+#nographics_allow_host_audio = 1
+
+
+# Override the port for creating both VNC and SPICE sessions (min).
+# This defaults to 5900 and increases for consecutive sessions
+# or when ports are occupied, until it hits the maximum.
+#
+# Minimum must be greater than or equal to 5900 as lower number would
+# result into negative vnc display number.
+#
+# Maximum must be less than 65536, because higher numbers do not make
+# sense as a port number.
+#
+#remote_display_port_min = 5900
+#remote_display_port_max = 65535
+
+# VNC WebSocket port policies, same rules apply as with remote display
+# ports.  VNC WebSockets use similar display <-> port mappings, with
+# the exception being that ports start from 5700 instead of 5900.
+#
+#remote_websocket_port_min = 5700
+#remote_websocket_port_max = 65535
+
+# The default security driver is SELinux. If SELinux is disabled
+# on the host, then the security driver will automatically disable
+# itself. If you wish to disable QEMU SELinux security driver while
+# leaving SELinux enabled for the host in general, then set this
+# to 'none' instead. It's also possible to use more than one security
+# driver at the same time, for this use a list of names separated by
+# comma and delimited by square brackets. For example:
+#
+#       security_driver = [ "selinux", "apparmor" ]
+#
+# Notes: The DAC security driver is always enabled; as a result, the
+# value of security_driver cannot contain "dac".  The value "none" is
+# a special value; security_driver can be set to that value in
+# isolation, but it cannot appear in a list of drivers.
+#
+#security_driver = "selinux"
+
+# If set to non-zero, then the default security labeling
+# will make guests confined. If set to zero, then guests
+# will be unconfined by default. Defaults to 1.
+#security_default_confined = 1
+
+# If set to non-zero, then attempts to create unconfined
+# guests will be blocked. Defaults to 0.
+#security_require_confined = 1
+
+# The user for QEMU processes run by the system instance. It can be
+# specified as a user name or as a user id. The qemu driver will try to
+# parse this value first as a name and then, if the name doesn't exist,
+# as a user id.
+#
+# Since a sequence of digits is a valid user name, a leading plus sign
+# can be used to ensure that a user id will not be interpreted as a user
+# name.
+#
+# Some examples of valid values are:
+#
+#       user = "qemu"   # A user named "qemu"
+#       user = "+0"     # Super user (uid=0)
+#       user = "100"    # A user named "100" or a user with uid=100
+#
+#user = "root"
+
+# The group for QEMU processes run by the system instance. It can be
+# specified in a similar way to user.
+#group = "root"
+
+# Whether libvirt should dynamically change file ownership
+# to match the configured user/group above. Defaults to 1.
+# Set to 0 to disable file ownership changes.
+#dynamic_ownership = 1
+
+# What cgroup controllers to make use of with QEMU guests
+#
+#  - 'cpu' - use for scheduler tunables
+#  - 'devices' - use for device whitelisting
+#  - 'memory' - use for memory tunables
+#  - 'blkio' - use for block devices I/O tunables
+#  - 'cpuset' - use for CPUs and memory nodes
+#  - 'cpuacct' - use for CPUs statistics.
+#
+# NB, even if configured here, they won't be used unless
+# the administrator has mounted cgroups, e.g.:
+#
+#  mkdir /dev/cgroup
+#  mount -t cgroup -o devices,cpu,memory,blkio,cpuset none /dev/cgroup
+#
+# They can be mounted anywhere, and different controllers
+# can be mounted in different locations. libvirt will detect
+# where they are located.
+#
+#cgroup_controllers = [ "cpu", "devices", "memory", "blkio", "cpuset", "cpuacct" ]
+
+# This is the basic set of devices allowed / required by
+# all virtual machines.
+#
+# As well as this, any configured block backed disks,
+# all sound device, and all PTY devices are allowed.
+#
+# This will only need setting if newer QEMU suddenly
+# wants some device we don't already know about.
+#
+#cgroup_device_acl = [
+#    "/dev/null", "/dev/full", "/dev/zero",
+#    "/dev/random", "/dev/urandom",
+#    "/dev/ptmx", "/dev/kvm",
+#    "/dev/rtc","/dev/hpet"
+#]
+#
+# RDMA migration requires the following extra files to be added to the list:
+#   "/dev/infiniband/rdma_cm",
+#   "/dev/infiniband/issm0",
+#   "/dev/infiniband/issm1",
+#   "/dev/infiniband/umad0",
+#   "/dev/infiniband/umad1",
+#   "/dev/infiniband/uverbs0"
+
+
+# The default format for QEMU/KVM guest save images is raw; that is, the
+# memory from the domain is dumped out directly to a file.  If you have
+# guests with a large amount of memory, however, this can take up quite
+# a bit of space.  If you would like to compress the images while they
+# are being saved to disk, you can also set "lzop", "gzip", "bzip2", or "xz"
+# for save_image_format.  Note that this means you slow down the process of
+# saving a domain in order to save disk space; the list above is in descending
+# order by performance and ascending order by compression ratio.
+#
+# save_image_format is used when you use 'virsh save' or 'virsh managedsave'
+# at scheduled saving, and it is an error if the specified save_image_format
+# is not valid, or the requested compression program can't be found.
+#
+# dump_image_format is used when you use 'virsh dump' at emergency
+# crashdump, and if the specified dump_image_format is not valid, or
+# the requested compression program can't be found, this falls
+# back to "raw" compression.
+#
+# snapshot_image_format specifies the compression algorithm of the memory save
+# image when an external snapshot of a domain is taken. This does not apply
+# on disk image format. It is an error if the specified format isn't valid,
+# or the requested compression program can't be found.
+#
+#save_image_format = "raw"
+#dump_image_format = "raw"
+#snapshot_image_format = "raw"
+
+# When a domain is configured to be auto-dumped when libvirtd receives a
+# watchdog event from qemu guest, libvirtd will save dump files in directory
+# specified by auto_dump_path. Default value is /var/lib/libvirt/qemu/dump
+#
+#auto_dump_path = "/var/lib/libvirt/qemu/dump"
+
+# When a domain is configured to be auto-dumped, enabling this flag
+# has the same effect as using the VIR_DUMP_BYPASS_CACHE flag with the
+# virDomainCoreDump API.  That is, the system will avoid using the
+# file system cache while writing the dump file, but may cause
+# slower operation.
+#
+#auto_dump_bypass_cache = 0
+
+# When a domain is configured to be auto-started, enabling this flag
+# has the same effect as using the VIR_DOMAIN_START_BYPASS_CACHE flag
+# with the virDomainCreateWithFlags API.  That is, the system will
+# avoid using the file system cache when restoring any managed state
+# file, but may cause slower operation.
+#
+#auto_start_bypass_cache = 0
+
+# If provided by the host and a hugetlbfs mount point is configured,
+# a guest may request huge page backing.  When this mount point is
+# unspecified here, determination of a host mount point in /proc/mounts
+# will be attempted.  Specifying an explicit mount overrides detection
+# of the same in /proc/mounts.  Setting the mount point to "" will
+# disable guest hugepage backing. If desired, multiple mount points can
+# be specified at once, separated by comma and enclosed in square
+# brackets, for example:
+#
+#     hugetlbfs_mount = ["/dev/hugepages2M", "/dev/hugepages1G"]
+#
+# The size of huge page served by specific mount point is determined by
+# libvirt at the daemon startup.
+#
+# NB, within these mount points, guests will create memory backing
+# files in a location of $MOUNTPOINT/libvirt/qemu
+#
+#hugetlbfs_mount = "/dev/hugepages"
+
+
+# Path to the setuid helper for creating tap devices.  This executable
+# is used to create <source type='bridge'> interfaces when libvirtd is
+# running unprivileged.  libvirt invokes the helper directly, instead
+# of using "-netdev bridge", for security reasons.
+#bridge_helper = "/usr/lib/qemu/qemu-bridge-helper"
+
+
+
+# If clear_emulator_capabilities is enabled, libvirt will drop all
+# privileged capabilities of the QEMU/KVM emulator. This is enabled by
+# default.
+#
+# Warning: Disabling this option means that a compromised guest can
+# exploit the privileges and possibly do damage to the host.
+#
+#clear_emulator_capabilities = 1
+
+
+# If enabled, libvirt will have QEMU set its process name to
+# "qemu:VM_NAME", where VM_NAME is the name of the VM. The QEMU
+# process will appear as "qemu:VM_NAME" in process listings and
+# other system monitoring tools. By default, QEMU does not set
+# its process title, so the complete QEMU command (emulator and
+# its arguments) appear in process listings.
+#
+#set_process_name = 1
+
+
+# If max_processes is set to a positive integer, libvirt will use
+# it to set the maximum number of processes that can be run by qemu
+# user. This can be used to override default value set by host OS.
+# The same applies to max_files which sets the limit on the maximum
+# number of opened files.
+#
+#max_processes = 0
+#max_files = 0
+
+# If max_core is set to a non-zero integer, then QEMU will be
+# permitted to create core dumps when it crashes, provided its
+# RAM size is smaller than the limit set.
+#
+# Be warned that the core dump will include a full copy of the
+# guest RAM, if the 'dump_guest_core' setting has been enabled,
+# or if the guest XML contains
+#
+#   <memory dumpcore="on">...guest ram...</memory>
+#
+# If guest RAM is to be included, ensure the max_core limit
+# is set to at least the size of the largest expected guest
+# plus another 1GB for any QEMU host side memory mappings.
+#
+# As a special case it can be set to the string "unlimited" to
+# to allow arbitrarily sized core dumps.
+#
+# By default the core dump size is set to 0 disabling all dumps
+#
+# Size is a positive integer specifying bytes or the
+# string "unlimited"
+#
+#max_core = "unlimited"
+
+# Determine if guest RAM is included in QEMU core dumps. By
+# default guest RAM will be excluded if a new enough QEMU is
+# present. Setting this to '1' will force guest RAM to always
+# be included in QEMU core dumps.
+#
+# This setting will be ignored if the guest XML has set the
+# dumpcore attribute on the <memory> element.
+#
+#dump_guest_core = 1
+
+# mac_filter enables MAC addressed based filtering on bridge ports.
+# This currently requires ebtables to be installed.
+#
+#mac_filter = 1
+
+
+# By default, PCI devices below non-ACS switch are not allowed to be assigned
+# to guests. By setting relaxed_acs_check to 1 such devices will be allowed to
+# be assigned to guests.
+#
+#relaxed_acs_check = 1
+
+
+# In order to prevent accidentally starting two domains that
+# share one writable disk, libvirt offers two approaches for
+# locking files. The first one is sanlock, the other one,
+# virtlockd, is then our own implementation. Accepted values
+# are "sanlock" and "lockd".
+#
+#lock_manager = "lockd"
+
+
+# Set limit of maximum APIs queued on one domain. All other APIs
+# over this threshold will fail on acquiring job lock. Specially,
+# setting to zero turns this feature off.
+# Note, that job lock is per domain.
+#
+#max_queued = 0
+
+###################################################################
+# Keepalive protocol:
+# This allows qemu driver to detect broken connections to remote
+# libvirtd during peer-to-peer migration.  A keepalive message is
+# sent to the daemon after keepalive_interval seconds of inactivity
+# to check if the daemon is still responding; keepalive_count is a
+# maximum number of keepalive messages that are allowed to be sent
+# to the daemon without getting any response before the connection
+# is considered broken.  In other words, the connection is
+# automatically closed approximately after
+# keepalive_interval * (keepalive_count + 1) seconds since the last
+# message received from the daemon.  If keepalive_interval is set to
+# -1, qemu driver will not send keepalive requests during
+# peer-to-peer migration; however, the remote libvirtd can still
+# send them and source libvirtd will send responses.  When
+# keepalive_count is set to 0, connections will be automatically
+# closed after keepalive_interval seconds of inactivity without
+# sending any keepalive messages.
+#
+#keepalive_interval = 5
+#keepalive_count = 5
+
+
+
+# Use seccomp syscall sandbox in QEMU.
+# 1 == seccomp enabled, 0 == seccomp disabled
+#
+# If it is unset (or -1), then seccomp will be enabled
+# only if QEMU >= 2.11.0 is detected, otherwise it is
+# left disabled. This ensures the default config gets
+# protection for new QEMU using the blacklist approach.
+#
+#seccomp_sandbox = 1
+
+
+# Override the listen address for all incoming migrations. Defaults to
+# 0.0.0.0, or :: if both host and qemu are capable of IPv6.
+#migration_address = "0.0.0.0"
+
+
+# The default hostname or IP address which will be used by a migration
+# source for transferring migration data to this host.  The migration
+# source has to be able to resolve this hostname and connect to it so
+# setting "localhost" will not work.  By default, the host's configured
+# hostname is used.
+#migration_host = "host.example.com"
+
+
+# Override the port range used for incoming migrations.
+#
+# Minimum must be greater than 0, however when QEMU is not running as root,
+# setting the minimum to be lower than 1024 will not work.
+#
+# Maximum must not be greater than 65535.
+#
+#migration_port_min = 49152
+#migration_port_max = 49215
+
+
+
+# Timestamp QEMU's log messages (if QEMU supports it)
+#
+# Defaults to 1.
+#
+#log_timestamp = 0
+
+
+# Location of master nvram file
+#
+# When a domain is configured to use UEFI instead of standard
+# BIOS it may use a separate storage for UEFI variables. If
+# that's the case libvirt creates the variable store per domain
+# using this master file as image. Each UEFI firmware can,
+# however, have different variables store. Therefore the nvram is
+# a list of strings when a single item is in form of:
+#   ${PATH_TO_UEFI_FW}:${PATH_TO_UEFI_VARS}.
+# Later, when libvirt creates per domain variable store, this list is
+# searched for the master image. The UEFI firmware can be called
+# differently for different guest architectures. For instance, it's OVMF
+# for x86_64 and i686, but it's AAVMF for aarch64. The libvirt default
+# follows this scheme.
+nvram = [
+   "/usr/share/ovmf/x64/OVMF_CODE.fd:/usr/share/ovmf/x64/OVMF_VARS.fd",
+]
+
+# The backend to use for handling stdout/stderr output from
+# QEMU processes.
+#
+#  'file': QEMU writes directly to a plain file. This is the
+#          historical default, but allows QEMU to inflict a
+#          denial of service attack on the host by exhausting
+#          filesystem space
+#
+#  'logd': QEMU writes to a pipe provided by virtlogd daemon.
+#          This is the current default, providing protection
+#          against denial of service by performing log file
+#          rollover when a size limit is hit.
+#
+#stdio_handler = "logd"
+
+# QEMU gluster libgfapi log level, debug levels are 0-9, with 9 being the
+# most verbose, and 0 representing no debugging output.
+#
+# The current logging levels defined in the gluster GFAPI are:
+#
+#    0 - None
+#    1 - Emergency
+#    2 - Alert
+#    3 - Critical
+#    4 - Error
+#    5 - Warning
+#    6 - Notice
+#    7 - Info
+#    8 - Debug
+#    9 - Trace
+#
+# Defaults to 4
+#
+#gluster_debug_level = 9
+
+# To enhance security, QEMU driver is capable of creating private namespaces
+# for each domain started. Well, so far only "mount" namespace is supported. If
+# enabled it means qemu process is unable to see all the devices on the system,
+# only those configured for the domain in question. Libvirt then manages
+# devices entries throughout the domain lifetime. This namespace is turned on
+# by default.
+#namespaces = [ "mount" ]
+
+# This directory is used for memoryBacking source if configured as file.
+# NOTE: big files will be stored here
+#memory_backing_dir = "/var/lib/libvirt/qemu/ram"
+
+# Path to the SCSI persistent reservations helper. This helper is
+# used whenever <reservations/> are enabled for SCSI LUN devices.
+#pr_helper = "/usr/bin/qemu-pr-helper"
+
+# User for the swtpm TPM Emulator
+#
+# Default is 'tss'; this is the same user that tcsd (TrouSerS) installs
+# and uses; alternative is 'root'
+#
+#swtpm_user = "tss"
+#swtpm_group = "tss"