dhcp_agent.ini

DEFAULT

ovs_use_veth
Type:

boolean

Default:

False

Uses veth for an OVS interface or not. Support kernels with limited namespace support (e.g. RHEL 6.5) and rate limiting on router’s gateway port so long as ovs_use_veth is set to True.

interface_driver
Type:

string

Default:

<None>

The driver used to manage virtual interfaces.

rpc_response_max_timeout
Type:

integer

Default:

600

Maximum seconds to wait for a response from an RPC call.

resync_interval
Type:

integer

Default:

5

The DHCP agent will resync its state with Neutron to recover from any transient notification or RPC errors. The interval is the maximum number of seconds between attempts. The resync can be done more often based on the events triggered.

resync_throttle
Type:

integer

Default:

1

Throttle the number of resync state events between the local DHCP state and Neutron to only once per ‘resync_throttle’ seconds. The value of throttle introduces a minimum interval between resync state events. Otherwise the resync may end up in a busy-loop. The value must be less than resync_interval.

dhcp_driver
Type:

string

Default:

neutron.agent.linux.dhcp.Dnsmasq

The driver used to manage the DHCP server.

enable_isolated_metadata
Type:

boolean

Default:

False

The DHCP server can assist with providing metadata support on isolated networks. Setting this value to True will cause the DHCP server to append specific host routes to the DHCP request. The metadata service will only be activated when the subnet does not contain any router port. The guest instance must be configured to request host routes via DHCP (Option 121). This option does not have any effect when force_metadata is set to True.

force_metadata
Type:

boolean

Default:

False

In some cases the Neutron router is not present to provide the metadata IP but the DHCP server can be used to provide this info. Setting this value will force the DHCP server to append specific host routes to the DHCP request. If this option is set, then the metadata service will be activated for all of the networks.

enable_metadata_network
Type:

boolean

Default:

False

Allows for serving metadata requests coming from a dedicated metadata access network whose CIDR is 169.254.169.254/16 (or larger prefix), and is connected to a Neutron router from which the VMs send metadata:1 request. In this case DHCP Option 121 will not be injected in VMs, as they will be able to reach 169.254.169.254 through a router. This option requires enable_isolated_metadata = True.

num_sync_threads
Type:

integer

Default:

4

Number of threads to use during sync process. Should not exceed connection pool size configured on server.

bulk_reload_interval
Type:

integer

Default:

0

Minimum Value:

0

Time to sleep between reloading the DHCP allocations. This will only be invoked if the value is not 0. If a network has N updates in X seconds then it will reload once and not N times.

dhcp_confs
Type:

string

Default:

$state_path/dhcp

Location to store DHCP server config files.

dnsmasq_config_file
Type:

string

Default:

''

Override the default dnsmasq settings with this file.

dnsmasq_dns_servers
Type:

list

Default:

[]

Comma-separated list of the DNS servers which will be used as forwarders.

dnsmasq_base_log_dir
Type:

string

Default:

<None>

Base log dir for dnsmasq logging. The log contains DHCP and DNS log information and is useful for debugging issues with either DHCP or DNS. If this section is null, disable dnsmasq log.

dnsmasq_local_resolv
Type:

boolean

Default:

False

Enables the dnsmasq service to provide name resolution for instances via DNS resolvers on the host running the DHCP agent. Effectively removes the ‘–no-resolv’ option from the dnsmasq process arguments. Adding custom DNS resolvers to the ‘dnsmasq_dns_servers’ option disables this feature.

dnsmasq_lease_max
Type:

integer

Default:

16777216

Limit number of leases to prevent a denial-of-service.

dhcp_broadcast_reply
Type:

boolean

Default:

False

Use broadcast in DHCP replies.

dnsmasq_enable_addr6_list
Type:

boolean

Default:

False

Enable dhcp-host entry with list of addresses when port has multiple IPv6 addresses in the same subnet.

debug
Type:

boolean

Default:

False

Mutable:

This option can be changed without restarting.

If set to true, the logging level will be set to DEBUG instead of the default INFO level.

log_config_append
Type:

string

Default:

<None>

Mutable:

This option can be changed without restarting.

The name of a logging configuration file. This file is appended to any existing logging configuration files. For details about logging configuration files, see the Python logging module documentation. Note that when logging configuration files are used then all logging configuration is set in the configuration file and other logging configuration options are ignored (for example, log-date-format).

Deprecated Variations

Group

Name

DEFAULT

log-config

DEFAULT

log_config
log_date_format
Type:

string

Default:

%Y-%m-%d %H:%M:%S

Defines the format string for %(asctime)s in log records. Default: the value above . This option is ignored if log_config_append is set.

log_file
Type:

string

Default:

<None>

(Optional) Name of log file to send logging output to. If no default is set, logging will go to stderr as defined by use_stderr. This option is ignored if log_config_append is set.

Deprecated Variations

Group

Name

DEFAULT

logfile
log_dir
Type:

string

Default:

<None>

(Optional) The base directory used for relative log_file paths. This option is ignored if log_config_append is set.

Deprecated Variations

Group

Name

DEFAULT

logdir
watch_log_file
Type:

boolean

Default:

False

Uses logging handler designed to watch file system. When log file is moved or removed this handler will open a new log file with specified path instantaneously. It makes sense only if log_file option is specified and Linux platform is used. This option is ignored if log_config_append is set.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason:

This function is known to have bene broken for long time, and depends on the unmaintained library

use_syslog
Type:

boolean

Default:

False

Use syslog for logging. Existing syslog format is DEPRECATED and will be changed later to honor RFC5424. This option is ignored if log_config_append is set.

use_journal
Type:

boolean

Default:

False

Enable journald for logging. If running in a systemd environment you may wish to enable journal support. Doing so will use the journal native protocol which includes structured metadata in addition to log messages.This option is ignored if log_config_append is set.

syslog_log_facility
Type:

string

Default:

LOG_USER

Syslog facility to receive log lines. This option is ignored if log_config_append is set.

use_json
Type:

boolean

Default:

False

Use JSON formatting for logging. This option is ignored if log_config_append is set.

use_stderr
Type:

boolean

Default:

False

Log output to standard error. This option is ignored if log_config_append is set.

use_eventlog
Type:

boolean

Default:

False

Log output to Windows Event Log.

Warning

This option is deprecated for removal. Its value may be silently ignored in the future.

Reason:

Windows support is no longer maintained.

log_color
Type:

boolean

Default:

False

(Optional) Set the ‘color’ key according to log levels. This option takes effect only when logging to stderr or stdout is used. This option is ignored if log_config_append is set.

log_rotate_interval
Type:

integer

Default:

1

The amount of time before the log files are rotated. This option is ignored unless log_rotation_type is set to “interval”.

log_rotate_interval_type
Type:

string

Default:

days

Valid Values:

Seconds, Minutes, Hours, Days, Weekday, Midnight

Rotation interval type. The time of the last file change (or the time when the service was started) is used when scheduling the next rotation.

max_logfile_count
Type:

integer

Default:

30

Maximum number of rotated log files.

max_logfile_size_mb
Type:

integer

Default:

200

Log file maximum size in MB. This option is ignored if “log_rotation_type” is not set to “size”.

log_rotation_type
Type:

string

Default:

none

Valid Values:

interval, size, none

Log rotation type.

Possible values

interval

Rotate logs at predefined time intervals.

size

Rotate logs once they reach a predefined size.

none

Do not rotate log files.

logging_context_format_string
Type:

string

Default:

%(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(global_request_id)s %(request_id)s %(user_identity)s] %(instance)s%(message)s

Format string to use for log messages with context. Used by oslo_log.formatters.ContextFormatter

logging_default_format_string
Type:

string

Default:

%(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [-] %(instance)s%(message)s

Format string to use for log messages when context is undefined. Used by oslo_log.formatters.ContextFormatter

logging_debug_format_suffix
Type:

string

Default:

%(funcName)s %(pathname)s:%(lineno)d

Additional data to append to log message when logging level for the message is DEBUG. Used by oslo_log.formatters.ContextFormatter

logging_exception_prefix
Type:

string

Default:

%(asctime)s.%(msecs)03d %(process)d ERROR %(name)s %(instance)s

Prefix each line of exception output with this format. Used by oslo_log.formatters.ContextFormatter

logging_user_identity_format
Type:

string

Default:

%(user)s %(project)s %(domain)s %(system_scope)s %(user_domain)s %(project_domain)s

Defines the format string for %(user_identity)s that is used in logging_context_format_string. Used by oslo_log.formatters.ContextFormatter

default_log_levels
Type:

list

Default:

['amqp=WARN', 'amqplib=WARN', 'boto=WARN', 'qpid=WARN', 'sqlalchemy=WARN', 'suds=INFO', 'oslo.messaging=INFO', 'oslo_messaging=INFO', 'iso8601=WARN', 'requests.packages.urllib3.connectionpool=WARN', 'urllib3.connectionpool=WARN', 'websocket=WARN', 'requests.packages.urllib3.util.retry=WARN', 'urllib3.util.retry=WARN', 'keystonemiddleware=WARN', 'routes.middleware=WARN', 'stevedore=WARN', 'taskflow=WARN', 'keystoneauth=WARN', 'oslo.cache=INFO', 'oslo_policy=INFO', 'dogpile.core.dogpile=INFO']

List of package logging levels in logger=LEVEL pairs. This option is ignored if log_config_append is set.

publish_errors
Type:

boolean

Default:

False

Enables or disables publication of error events.

instance_format
Type:

string

Default:

"[instance: %(uuid)s] "

The format for an instance that is passed with the log message.

instance_uuid_format
Type:

string

Default:

"[instance: %(uuid)s] "

The format for an instance UUID that is passed with the log message.

rate_limit_interval
Type:

integer

Default:

0

Interval, number of seconds, of log rate limiting.

rate_limit_burst
Type:

integer

Default:

0

Maximum number of logged messages per rate_limit_interval.

rate_limit_except_level
Type:

string

Default:

CRITICAL

Valid Values:

CRITICAL, ERROR, INFO, WARNING, DEBUG, ‘’

Log level name used by rate limiting. Logs with level greater or equal to rate_limit_except_level are not filtered. An empty string means that all levels are filtered.

fatal_deprecations
Type:

boolean

Default:

False

Enables or disables fatal status of deprecations.

agent

availability_zone
Type:

string

Default:

nova

Availability zone of this node

report_interval
Type:

floating point

Default:

30

Seconds between nodes reporting state to server; should be less than agent_down_time, best if it is half or less than agent_down_time.

log_agent_heartbeats
Type:

boolean

Default:

False

Log agent heartbeats

metadata_rate_limiting

rate_limit_enabled
Type:

boolean

Default:

False

Enable rate limiting on the metadata API.

ip_versions
Type:

list

Default:

[4]

Comma separated list of the metadata address IP versions (4, 6) for which rate limiting will be enabled. The default is to rate limit only for the metadata IPv4 address. NOTE: at the moment, the open source version of HAProxy only allows us to rate limit for IPv4 or IPv6, but not both at the same time.

base_window_duration
Type:

integer

Default:

10

Duration (seconds) of the base window on the metadata API.

base_query_rate_limit
Type:

integer

Default:

10

Max number of queries to accept during the base window.

burst_window_duration
Type:

integer

Default:

10

Duration (seconds) of the burst window on the metadata API.

burst_query_rate_limit
Type:

integer

Default:

10

Max number of queries to accept during the burst window.

ovs

ovsdb_connection
Type:

string

Default:

tcp:127.0.0.1:6640

The connection string for the OVSDB backend. Will be used for all OVSDB commands and by ovsdb-client when monitoring

ssl_key_file
Type:

string

Default:

<None>

The SSL private key file to use when interacting with OVSDB. Required when using an “ssl:” prefixed ovsdb_connection

ssl_cert_file
Type:

string

Default:

<None>

The SSL certificate file to use when interacting with OVSDB. Required when using an “ssl:” prefixed ovsdb_connection

ssl_ca_cert_file
Type:

string

Default:

<None>

The Certificate Authority (CA) certificate to use when interacting with OVSDB. Required when using an “ssl:” prefixed ovsdb_connection

ovsdb_debug
Type:

boolean

Default:

False

Enable OVSDB debug logs

ovsdb_timeout
Type:

integer

Default:

10

Timeout in seconds for OVSDB commands. If the timeout expires, OVSDB commands will fail with ALARMCLOCK error.

bridge_mac_table_size
Type:

integer

Default:

50000

The maximum number of MAC addresses to learn on a bridge managed by the Neutron OVS agent. Values outside a reasonable range (10 to 1,000,000) might be overridden by Open vSwitch according to the documentation.

igmp_snooping_enable
Type:

boolean

Default:

False

Enable IGMP snooping for integration bridge. If this option is set to True, support for Internet Group Management Protocol (IGMP) is enabled in integration bridge.

igmp_flood
Type:

boolean

Default:

False

Multicast packets (except reports) are unconditionally forwarded to the ports bridging a logical network to a physical network.

igmp_flood_reports
Type:

boolean

Default:

True

Multicast reports are unconditionally forwarded to the ports bridging a logical network to a physical network.

igmp_flood_unregistered
Type:

boolean

Default:

False

This option enables or disables flooding of unregistered multicast packets to all ports. If False, The switch will send unregistered multicast packets only to ports connected to multicast routers.