# Master libvirt daemon configuration file # # For further information consult http://libvirt.org/format.html # # NOTE: the tests/daemon-conf regression test script requires # that each "PARAMETER = VALUE" line in this file have the parameter # name just after a leading "#". ################################################################# # # Network connectivity controls # # Flag listening for secure TLS connections on the public TCP/IP port. # NB, must pass the --listen flag to the libvirtd process for this to # have any effect. # # It is necessary to setup a CA and issue server certificates before # using this capability. # # This is enabled by default, uncomment this to disable it #listen_tls = 0 # Listen for unencrypted TCP connections on the public TCP/IP port. # NB, must pass the --listen flag to the libvirtd process for this to # have any effect. # # Using the TCP socket requires SASL authentication by default. Only # SASL mechanisms which support data encryption are allowed. This is # DIGEST_MD5 and GSSAPI (Kerberos5) # # This is disabled by default, uncomment this to enable it. #listen_tcp = 1 # Override the port for accepting secure TLS connections # This can be a port number, or service name # #tls_port = "16514" # Override the port for accepting insecure TCP connections # This can be a port number, or service name # #tcp_port = "16509" # Override the default configuration which binds to all network # interfaces. This can be a numeric IPv4/6 address, or hostname # # If the libvirtd service is started in parallel with network # startup (e.g. with systemd), binding to addresses other than # the wildcards (0.0.0.0/::) might not be available yet. # #listen_addr = "192.168.0.1" # Flag toggling mDNS advertizement of the libvirt service. # # Alternatively can disable for all services on a host by # stopping the Avahi daemon # # This is disabled by default, uncomment this to enable it #mdns_adv = 1 # Override the default mDNS advertizement name. This must be # unique on the immediate broadcast network. # # The default is "Virtualization Host HOSTNAME", where HOSTNAME # is substituted for the short hostname of the machine (without domain) # #mdns_name = "Virtualization Host Joe Demo" ################################################################# # # UNIX socket access controls # # Beware that if you are changing *any* of these options, and you use # socket activation with systemd, you need to adjust the settings in # the libvirtd.socket file as well since it could impose a security # risk if you rely on file permission checking only. # Set the UNIX domain socket group ownership. This can be used to # allow a 'trusted' set of users access to management capabilities # without becoming root. # # This is restricted to 'root' by default. #unix_sock_group = "libvirt" # Set the UNIX socket permissions for the R/O socket. This is used # for monitoring VM status only # # Default allows any user. If setting group ownership, you may want to # restrict this too. #unix_sock_ro_perms = "0777" # Set the UNIX socket permissions for the R/W socket. This is used # for full management of VMs # # Default allows only root. If PolicyKit is enabled on the socket, # the default will change to allow everyone (eg, 0777) # # If not using PolicyKit and setting group ownership for access # control, then you may want to relax this too. #unix_sock_rw_perms = "0770" # Set the name of the directory in which sockets will be found/created. #unix_sock_dir = "/var/run/libvirt" ################################################################# # # Authentication. # # - none: do not perform auth checks. If you can connect to the # socket you are allowed. This is suitable if there are # restrictions on connecting to the socket (eg, UNIX # socket permissions), or if there is a lower layer in # the network providing auth (eg, TLS/x509 certificates) # # - sasl: use SASL infrastructure. The actual auth scheme is then # controlled from /etc/sasl2/libvirt.conf. For the TCP # socket only GSSAPI & DIGEST-MD5 mechanisms will be used. # For non-TCP or TLS sockets, any scheme is allowed. # # - polkit: use PolicyKit to authenticate. This is only suitable # for use on the UNIX sockets. The default policy will # require a user to supply their own password to gain # full read/write access (aka sudo like), while anyone # is allowed read/only access. # # Set an authentication scheme for UNIX read-only sockets # By default socket permissions allow anyone to connect # # To restrict monitoring of domains you may wish to enable # an authentication mechanism here #auth_unix_ro = "none" # Set an authentication scheme for UNIX read-write sockets # By default socket permissions only allow root. If PolicyKit # support was compiled into libvirt, the default will be to # use 'polkit' auth. # # If the unix_sock_rw_perms are changed you may wish to enable # an authentication mechanism here #auth_unix_rw = "none" # Change the authentication scheme for TCP sockets. # # If you don't enable SASL, then all TCP traffic is cleartext. # Don't do this outside of a dev/test scenario. For real world # use, always enable SASL and use the GSSAPI or DIGEST-MD5 # mechanism in /etc/sasl2/libvirt.conf #auth_tcp = "sasl" # Change the authentication scheme for TLS sockets. # # TLS sockets already have encryption provided by the TLS # layer, and limited authentication is done by certificates # # It is possible to make use of any SASL authentication # mechanism as well, by using 'sasl' for this option #auth_tls = "none" # Change the API access control scheme # # By default an authenticated user is allowed access # to all APIs. Access drivers can place restrictions # on this. By default the 'nop' driver is enabled, # meaning no access control checks are done once a # client has authenticated with libvirtd # #access_drivers = [ "polkit" ] ################################################################# # # TLS x509 certificate configuration # # Override the default server key file path # #key_file = "/etc/pki/libvirt/private/serverkey.pem" # Override the default server certificate file path # #cert_file = "/etc/pki/libvirt/servercert.pem" # Override the default CA certificate path # #ca_file = "/etc/pki/CA/cacert.pem" # Specify a certificate revocation list. # # Defaults to not using a CRL, uncomment to enable it #crl_file = "/etc/pki/CA/crl.pem" ################################################################# # # Authorization controls # # Flag to disable verification of our own server certificates # # When libvirtd starts it performs some sanity checks against # its own certificates. # # Default is to always run sanity checks. Uncommenting this # will disable sanity checks which is not a good idea #tls_no_sanity_certificate = 1 # Flag to disable verification of client certificates # # Client certificate verification is the primary authentication mechanism. # Any client which does not present a certificate signed by the CA # will be rejected. # # Default is to always verify. Uncommenting this will disable # verification - make sure an IP whitelist is set #tls_no_verify_certificate = 1 # A whitelist of allowed x509 Distinguished Names # This list may contain wildcards such as # # "C=GB,ST=London,L=London,O=Red Hat,CN=*" # # See the POSIX fnmatch function for the format of the wildcards. # # NB If this is an empty list, no client can connect, so comment out # entirely rather than using empty list to disable these checks # # By default, no DN's are checked #tls_allowed_dn_list = ["DN1", "DN2"] # A whitelist of allowed SASL usernames. The format for usernames # depends on the SASL authentication mechanism. Kerberos usernames # look like username@REALM # # This list may contain wildcards such as # # "*@EXAMPLE.COM" # # See the POSIX fnmatch function for the format of the wildcards. # # NB If this is an empty list, no client can connect, so comment out # entirely rather than using empty list to disable these checks # # By default, no Username's are checked #sasl_allowed_username_list = ["joe@EXAMPLE.COM", "fred@EXAMPLE.COM" ] ################################################################# # # Processing controls # # The maximum number of concurrent client connections to allow # over all sockets combined. #max_clients = 5000 # The maximum length of queue of connections waiting to be # accepted by the daemon. Note, that some protocols supporting # retransmission may obey this so that a later reattempt at # connection succeeds. #max_queued_clients = 1000 # The maximum length of queue of accepted but not yet # authenticated clients. The default value is zero, meaning # the feature is disabled. #max_anonymous_clients = 20 # The minimum limit sets the number of workers to start up # initially. If the number of active clients exceeds this, # then more threads are spawned, up to max_workers limit. # Typically you'd want max_workers to equal maximum number # of clients allowed #min_workers = 5 #max_workers = 20 # The number of priority workers. If all workers from above # pool are stuck, some calls marked as high priority # (notably domainDestroy) can be executed in this pool. #prio_workers = 5 # Total global limit on concurrent RPC calls. Should be # at least as large as max_workers. Beyond this, RPC requests # will be read into memory and queued. This directly impacts # memory usage, currently each request requires 256 KB of # memory. So by default up to 5 MB of memory is used # # XXX this isn't actually enforced yet, only the per-client # limit is used so far #max_requests = 20 # Limit on concurrent requests from a single client # connection. To avoid one client monopolizing the server # this should be a small fraction of the global max_requests # and max_workers parameter #max_client_requests = 5 ################################################################# # # Logging controls # # Logging level: 4 errors, 3 warnings, 2 information, 1 debug # basically 1 will log everything possible # Note: Journald may employ rate limiting of the messages logged # and thus lock up the libvirt daemon. To use the debug level with # journald you have to specify it explicitly in 'log_outputs', otherwise # only information level messages will be logged. #log_level = 3 # Logging filters: # A filter allows to select a different logging level for a given category # of logs # The format for a filter is one of: # x:name # x:+name # where name is a string which is matched against source file name, # e.g., "remote", "qemu", or "util/json", the optional "+" prefix # tells libvirt to log stack trace for each message matching name, # and x is the minimal level where matching messages should be logged: # 1: DEBUG # 2: INFO # 3: WARNING # 4: ERROR # # Multiple filters can be defined in a single @filters, they just need to be # separated by spaces. # # e.g. to only get warning or errors from the remote layer and only errors # from the event layer: #log_filters="3:remote 4:event" # Logging outputs: # An output is one of the places to save logging information # The format for an output can be: # x:stderr # output goes to stderr # x:syslog:name # use syslog for the output and use the given name as the ident # x:file:file_path # output to a file, with the given filepath # x:journald # output to journald logging system # In all case the x prefix is the minimal level, acting as a filter # 1: DEBUG # 2: INFO # 3: WARNING # 4: ERROR # # Multiple outputs can be defined, they just need to be separated by spaces. # e.g. to log all warnings and errors to syslog under the libvirtd ident: #log_outputs="3:syslog:libvirtd" # # Log debug buffer size: # # This configuration option is no longer used, since the global # log buffer functionality has been removed. Please configure # suitable log_outputs/log_filters settings to obtain logs. #log_buffer_size = 64 ################################################################## # # Auditing # # This setting allows usage of the auditing subsystem to be altered: # # audit_level == 0 -> disable all auditing # audit_level == 1 -> enable auditing, only if enabled on host (default) # audit_level == 2 -> enable auditing, and exit if disabled on host # #audit_level = 2 # # If set to 1, then audit messages will also be sent # via libvirt logging infrastructure. Defaults to 0 # #audit_logging = 1 ################################################################### # UUID of the host: # Provide the UUID of the host here in case the command # 'dmidecode -s system-uuid' does not provide a valid uuid. In case # 'dmidecode' does not provide a valid UUID and none is provided here, a # temporary UUID will be generated. # Keep the format of the example UUID below. UUID must not have all digits # be the same. # NB This default all-zeros UUID will not work. Replace # it with the output of the 'uuidgen' command and then # uncomment this entry #host_uuid = "00000000-0000-0000-0000-000000000000" ################################################################### # Keepalive protocol: # This allows libvirtd to detect broken client connections or even # dead clients. A keepalive message is sent to a client after # keepalive_interval seconds of inactivity to check if the client is # still responding; keepalive_count is a maximum number of keepalive # messages that are allowed to be sent to the client 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 client. If keepalive_interval is set to # -1, libvirtd will never send keepalive requests; however clients # can still send them and the daemon 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 # # If set to 1, libvirtd will refuse to talk to clients that do not # support keepalive protocol. Defaults to 0. # #keepalive_required = 1