Provided by: openvswitch-common_3.3.4-0ubuntu0.24.04.1_amd64 
NAME
Local_Config - Local_Config database schema
This database is for local configuration of an ovsdb-server. The database is meant to be unique, even
among multiple clustered db servers, so that configuration that is local to that server can be configured
separately (e.g. Connection information).
TABLE SUMMARY
The following list summarizes the purpose of each of the tables in the Local_Config database. Each table
is described in more detail on a later page.
Table Purpose
Config ovsdb-server configuration
Connection
OVSDB client connections.
Config TABLE
The root local configuration table for an ovsdb-server. This table must have exactly one row.
Summary:
Connection Options:
connections set of Connections
Details:
Connection Options:
connections: set of Connections
Database clients to which the Open vSwitch database server should connect or on which it should
listen, along with options for how these connections should be configured. See the Connection
table for more information.
Connection TABLE
Configuration for a database connection to an Open vSwitch database (OVSDB) client.
This table primarily configures the Open vSwitch database server (ovsdb-server).
The Open vSwitch database server can initiate and maintain active connections to remote clients. It can
also listen for database connections.
Summary:
Core Features:
target string (must be unique within table)
read_only boolean
role string
Client Failure Detection and Handling:
max_backoff optional integer, at least 1,000
inactivity_probe optional integer
Status:
is_connected boolean
status : last_error optional string
status : state optional string, one of ACTIVE, BACKOFF, CONNECTING, IDLE, or VOID
status : sec_since_connect optional string, containing an integer, at least 0
status : sec_since_disconnect
optional string, containing an integer, at least 0
status : locks_held optional string
status : locks_waiting optional string
status : locks_lost optional string
status : n_connections optional string, containing an integer, at least 2
status : bound_port optional string, containing an integer
Connection Parameters:
other_config : dscp optional string, containing an integer
Configuration:
external_ids map of string-string pairs
Details:
Core Features:
target: string (must be unique within table)
Connection methods for clients.
The following connection methods are currently supported:
ssl:host[:port]
The specified SSL port on the host at the given host, which can either be a DNS name (if
built with unbound library) or an IP address. A valid SSL configuration must be provided
when this form is used, this configuration can be specified via command-line options or the
SSL table.
If port is not specified, it defaults to 6640.
SSL support is an optional feature that is not always built as part of Open vSwitch.
tcp:host[:port]
The specified TCP port on the host at the given host, which can either be a DNS name (if
built with unbound library) or an IP address. If host is an IPv6 address, wrap it in square
brackets, e.g. tcp:[::1]:6640.
If port is not specified, it defaults to 6640.
pssl:[port][:host]
Listens for SSL connections on the specified TCP port. Specify 0 for port to have the
kernel automatically choose an available port. If host, which can either be a DNS name (if
built with unbound library) or an IP address, is specified, then connections are restricted
to the resolved or specified local IPaddress (either IPv4 or IPv6 address). If host is an
IPv6 address, wrap in square brackets, e.g. pssl:6640:[::1]. If host is not specified then
it listens only on IPv4 (but not IPv6) addresses. A valid SSL configuration must be
provided when this form is used, this can be specified either via command-line options or
the SSL table.
If port is not specified, it defaults to 6640.
SSL support is an optional feature that is not always built as part of Open vSwitch.
ptcp:[port][:host]
Listens for connections on the specified TCP port. Specify 0 for port to have the kernel
automatically choose an available port. If host, which can either be a DNS name (if built
with unbound library) or an IP address, is specified, then connections are restricted to
the resolved or specified local IP address (either IPv4 or IPv6 address). If host is an
IPv6 address, wrap it in square brackets, e.g. ptcp:6640:[::1]. If host is not specified
then it listens only on IPv4 addresses.
If port is not specified, it defaults to 6640.
When multiple clients are configured, the target values must be unique. Duplicate target values
yield unspecified results.
read_only: boolean
true to restrict these connections to read-only transactions, false to allow them to modify the
database.
role: string
String containing role name for this connection entry.
Client Failure Detection and Handling:
max_backoff: optional integer, at least 1,000
Maximum number of milliseconds to wait between connection attempts. Default is implementation-
specific.
inactivity_probe: optional integer
Maximum number of milliseconds of idle time on connection to the client before sending an
inactivity probe message. If Open vSwitch does not communicate with the client for the specified
number of seconds, it will send a probe. If a response is not received for the same additional
amount of time, Open vSwitch assumes the connection has been broken and attempts to reconnect.
Default is implementation-specific. A value of 0 disables inactivity probes.
Status:
Key-value pair of is_connected is always updated. Other key-value pairs in the status columns may be
updated depends on the target type.
When target specifies a connection method that listens for inbound connections (e.g. ptcp: or punix:),
both n_connections and is_connected may also be updated while the remaining key-value pairs are omitted.
On the other hand, when target specifies an outbound connection, all key-value pairs may be updated,
except the above-mentioned two key-value pairs associated with inbound connection targets. They are
omitted.
is_connected: boolean
true if currently connected to this client, false otherwise.
status : last_error: optional string
A human-readable description of the last error on the connection to the manager; i.e.
strerror(errno). This key will exist only if an error has occurred.
status : state: optional string, one of ACTIVE, BACKOFF, CONNECTING, IDLE, or VOID
The state of the connection to the manager:
VOID Connection is disabled.
BACKOFF
Attempting to reconnect at an increasing period.
CONNECTING
Attempting to connect.
ACTIVE Connected, remote host responsive.
IDLE Connection is idle. Waiting for response to keep-alive.
These values may change in the future. They are provided only for human consumption.
status : sec_since_connect: optional string, containing an integer, at least 0
The amount of time since this client last successfully connected to the database (in seconds).
Value is empty if client has never successfully been connected.
status : sec_since_disconnect: optional string, containing an integer, at least 0
The amount of time since this client last disconnected from the database (in seconds). Value is
empty if client has never disconnected.
status : locks_held: optional string
Space-separated list of the names of OVSDB locks that the connection holds. Omitted if the
connection does not hold any locks.
status : locks_waiting: optional string
Space-separated list of the names of OVSDB locks that the connection is currently waiting to
acquire. Omitted if the connection is not waiting for any locks.
status : locks_lost: optional string
Space-separated list of the names of OVSDB locks that the connection has had stolen by another
OVSDB client. Omitted if no locks have been stolen from this connection.
status : n_connections: optional string, containing an integer, at least 2
When target specifies a connection method that listens for inbound connections (e.g. ptcp: or
pssl:) and more than one connection is actually active, the value is the number of active
connections. Otherwise, this key-value pair is omitted.
status : bound_port: optional string, containing an integer
When target is ptcp: or pssl:, this is the TCP port on which the OVSDB server is listening. (This
is particularly useful when target specifies a port of 0, allowing the kernel to choose any
available port.)
Connection Parameters:
other_config : dscp: optional string, containing an integer
The Differentiated Service Code Point (DSCP) is specified using 6 bits in the Type of Service
(TOS) field in the IP header. DSCP provides a mechanism to classify the network traffic and
provide Quality of Service (QoS) on IP networks. The DSCP value specified here is used when
establishing the connection between the manager and the Open vSwitch. If no value is specified, a
default value of 48 is chosen. Valid DSCP values must be in the range 0 to 63.
Configuration:
External configuration options
external_ids: map of string-string pairs
External client-defined key-value pairs
Open vSwitch 3.3.4 DB Schema 1.0.0 Local_Config(5)