Provided by: openvswitch-common_3.3.0-1ubuntu3_amd64 
NAME
ovsdb-tool - Open vSwitch database management utility
SYNOPSIS
Database Creation Commands:
ovsdb-tool [options] create [db [schema]]
ovsdb-tool [options] [--election-timer=ms] create-cluster db contents address
ovsdb-tool [options] [--cid=uuid] join-cluster db name local remote...
Version Management Commands:
ovsdb-tool [options] convert [db [schema [target]]]
ovsdb-tool [options] needs-conversion [db [schema]]
ovsdb-tool [options] db-version [db]
ovsdb-tool [options] schema-version [schema]
ovsdb-tool [options] db-cksum [db]
ovsdb-tool [options] schema-cksum [schema]
ovsdb-tool [options] compare-versions a op b
Other commands:
ovsdb-tool [options] compact [db [target]]
ovsdb-tool [options] [--rbac-role=role] query [db] transaction
ovsdb-tool [options] [--rbac-role=role] transact [db] transaction
ovsdb-tool [options] [-m | --more]... show-log [db]
ovsdb-tool [options] check-cluster db...
ovsdb-tool [options] db-name [db]
ovsdb-tool [options] schema-name [schema]
ovsdb-tool [options] db-cid db
ovsdb-tool [options] db-sid db
ovsdb-tool [options] db-local-address db
ovsdb-tool help
Logging options:
[-v[module[:destination[:level]]]]...
[--verbose[=module[:destination[:level]]]]...
[--log-file[=file]]
Common options:
[-h | --help] [-V | --version]
DESCRIPTION
The ovsdb-tool program is a command-line tool for managing Open vSwitch database (OVSDB)
files. It does not interact directly with running Open vSwitch database servers (instead,
use ovsdb-client). For an introduction to OVSDB and its implementation in Open vSwitch,
see ovsdb(7).
Each command that takes an optional db or schema argument has a default file location if
it is not specified.. The default db is /etc/openvswitch/conf.db. The default schema is
/usr/share/openvswitch/vswitch.ovsschema.
This OVSDB implementation supports standalone and active-backup database service models
with one on-disk format and a clustered database service model with a different format.
ovsdb-tool supports both formats, but some commands are appropriate for only one format,
as documented for individual commands below. For a specification of these formats, see
ovsdb(5). For more information on OVSDB service models, see the Service Models section in
ovsdb(7).
Database Creation Commands
These commands create a new OVSDB database file. They will not overwrite an existing
database file. To replace an existing database with a new one, first delete the old one.
create [db [schema]]
Use this command to create the database for controlling ovs-vswitchd or another
standalone or active-backup database. It creates database file db with the given
schema, which must be the name of a file that contains an OVSDB schema in JSON
format, as specified in the OVSDB specification. The new database is initially
empty. (You can use cp to copy a database including both its schema and data.)
[--election-timer=ms] create-cluster db contents local
Use this command to initialize the first server in a high-availability cluster of 3
(or more) database servers, e.g. for a database in an environment that cannot
tolerate a single point of failure. It creates clustered database file db and
configures the server to listen on local, which must take the form
protocol:ip:port, where protocol is tcp or ssl, ip is the server's IP (either an
IPv4 address or an IPv6 address enclosed in square brackets), and port is a TCP
port number. Only one address is specified, for the first server in the cluster,
ordinarily the one for the server running create-cluster. The address is used for
communication within the cluster, not for communicating with OVSDB clients, and
must not use the same port used for the OVSDB protocol.
The new database is initialized with contents, which must name a file that contains
either an OVSDB schema in JSON format or a standalone OVSDB database. If it is a
schema file, the new database will initially be empty, with the given schema. If
it is a database file, the new database will have the same schema and contents.
Leader election will be initiated by a follower if there is no heartbeat received
from the cluster leader within the specified election timer. The default leader
election timer is 1000 milliseconds. To use a different value when creating the
database, specify --election-timer=ms, where ms is a value in milliseconds between
100 and 600000 inclusive.
[--cid=uuid] join-cluster db name local remote...
Use this command to initialize each server after the first one in an OVSDB high-
availability cluster. It creates clustered database file db for a database named
name, and configures the server to listen on local and to initially connect to
remote, which must be a server that already belongs to the cluster. local and
remote use the same protocol:ip:port syntax as create-cluster.
The name must be the name of the schema or database passed to create-cluster. For
example, the name of the OVN Southbound database schema is OVN_Southbound. Use
ovsdb-tool's schema-name or db-name command to find out the name of a schema or
database, respectively.
This command does not do any network access, which means that it cannot actually
join the new server to the cluster. Instead, the db file that it creates prepares
the server to join the cluster the first time that ovsdb-server serves it. As part
of joining the cluster, the new server retrieves the database schema and obtains
the list of all cluster members. Only after that does it become a full member of
the cluster.
Optionally, more than one remote may be specified; for example, in a cluster that
already contains multiple servers, one could specify all the existing servers.
This is beneficial if some of the existing servers are down while the new server
joins, but it is not otherwise needed.
By default, the db created by join-cluster will join any clustered database named
name that is available at a remote. In theory, if machines go up and down and IP
addresses change in the right way, it could join the wrong database cluster. To
avoid this possibility, specify --cid=uuid, where uuid is the cluster ID of the
cluster to join, as printed by ovsdb-tool get-cid.
Database Migration Commands
This commands will convert cluster database to standalone database.
cluster-to-standalone db clusterdb
Use this command to convert to standalone database from clustered database when the
cluster is down and cannot be revived. It creates new standalone db file from the
given cluster db file.
Version Management Commands
An OVSDB schema has a schema version number, and an OVSDB database embeds a particular
version of an OVSDB schema. These version numbers take the form x.y.z, e.g. 1.2.3. The
OVSDB implementation does not enforce a particular version numbering scheme, but schemas
managed within the Open vSwitch project use the following approach. Whenever the database
schema is changed in a non-backward compatible way (e.g. deleting a column or a table), x
is incremented (and y and z are reset to 0). When the database schema is changed in a
backward compatible way (e.g. adding a new column), y is incremented (and z is reset to
0). When the database schema is changed cosmetically (e.g. reindenting its syntax), z is
incremented.
Some OVSDB databases and schemas, especially very old ones, do not have a version number.
Schema version numbers and Open vSwitch version numbers are independent.
These commands work with different versions of OVSDB schemas and databases.
convert [db [schema [target]]]
Reads db, translating it into to the schema specified in schema, and writes out the
new interpretation. If target is specified, the translated version is written as a
new file named target, which must not already exist. If target is omitted, then
the translated version of the database replaces db in-place. In-place conversion
cannot take place if the database is currently being served by ovsdb-server
(instead, either stop ovsdb-server first or use ovsdb-client's convert command).
This command can do simple ``upgrades'' and ``downgrades'' on a database's schema.
The data in db must be valid when interpreted under schema, with only one
exception: data in db for tables and columns that do not exist in schema are
ignored. Columns that exist in schema but not in db are set to their default
values. All of schema's constraints apply in full.
Some uses of this command can cause unrecoverable data loss. For example,
converting a database from a schema that has a given column or table to one that
does not will delete all data in that column or table. Back up critical databases
before converting them.
This command is for standalone and active-backup databases only. For clustered
databases, use ovsdb-client's convert command to convert them online.
needs-conversion [db [schema]]
Reads the schema embedded in db and the JSON schema from schema and compares them.
If the schemas are the same, prints no on stdout; if they differ, prints yes.
This command is for standalone and active-backup databases only. For clustered
databases, use ovsdb-client's needs-conversion command instead.
db-version [db]
schema-version [schema]
Prints the version number in the schema embedded within the database db or in the
JSON schema schema on stdout. If schema or db was created before schema versioning
was introduced, then it will not have a version number and this command will print
a blank line.
The db-version command is for standalone and active-backup databases only. For
clustered databases, use ovsdb-client's schema-version command instead.
db-cksum [db]
schema-cksum [schema]
Prints the checksum in the schema embedded within the database db or of the JSON
schema schema on stdout. If schema or db was created before schema checksums were
introduced, then it will not have a checksum and this command will print a blank
line.
The db-cksum command is for standalone and active-backup databases only. For
clustered databases, use ovsdb-client's schema-cksum command instead.
compare-versions a op b
Compares a and b according to op. Both a and b must be OVSDB schema version
numbers in the form x.y.z, as described in ovsdb(7), and op must be one of < <= ==
>= > !=. If the comparison is true, exits with status 0; if it is false, exits
with status 2. (Exit status 1 indicates an error, e.g. a or b is the wrong syntax
for an OVSDB version or op is not a valid comparison operator.)
Other Commands
compact [db [target]]
Reads db and writes a compacted version. If target is specified, the compacted
version is written as a new file named target, which must not already exist. If
target is omitted, then the compacted version of the database replaces db in-place.
This command is not needed in normal operation because ovsdb-server from time to
time automatically compacts a database that grows much larger than its minimum
size.
This command does not work if db is currently being served by ovsdb-server, or if
it is otherwise locked for writing by another process. This command also does not
work with clustered databases. Instead, in either case, send the
ovsdb-server/compact command to ovsdb-server, via ovs-appctl).
[--rbac-role=role] query [db] transaction
Opens db, executes transaction on it, and prints the results. The transaction must
be a JSON array in the format of the params array for the JSON-RPC transact method,
as described in the OVSDB specification.
This command opens db for read-only access, so it may safely run concurrently with
other database activity, including ovsdb-server and other database writers. The
transaction may specify database modifications, but these will have no effect on
db.
By default, the transaction is executed using the ``superuser'' RBAC role. Use
--rbac-role to specify a different role.
This command does not work with clustered databases. Instead, use ovsdb-client's
query command to send the query to ovsdb-server.
[--rbac-role=role] transact [db] transaction
Opens db, executes transaction on it, prints the results, and commits any changes
to db. The transaction must be a JSON array in the format of the params array for
the JSON-RPC transact method, as described in the OVSDB specification.
This command does not work if db is currently being served by ovsdb-server, or if
it is otherwise locked for writing by another process. This command also does not
work with clustered databases. Instead, in either case, use ovsdb-client's
transact command to send the query to ovsdb-server.
By default, the transaction is executed using the ``superuser'' RBAC role. Use
--rbac-role to specify a different role.
[-m | --more]... show-log [db]
Prints a summary of the records in db's log, including the time and date at which
each database change occurred and any associated comment. This may be useful for
debugging.
To increase the verbosity of output, add -m (or --more) one or more times to the
command line. With one -m, show-log prints a summary of the records added,
deleted, or modified by each transaction. With two -ms, show-log also prints the
values of the columns modified by each change to a record.
This command works with standalone and active-backup databases and with clustered
databases, but the output formats are different.
check-cluster db...
Reads all of the records in the supplied databases, which must be collected from
different servers (and ideally all the servers) in a single cluster. Checks each
database for self-consistency and the set together for cross-consistency. If
ovsdb-tool detects unusual but not necessarily incorrect content, it prints a
warning or warnings on stdout. If ovsdb-tool find consistency errors, it prints an
error on stderr and exits with status 1. Errors typically indicate bugs in
ovsdb-server; please consider reporting them to the Open vSwitch developers.
db-name [db]
schema-name [schema]
Prints the name of the schema embedded within the database db or in the JSON schema
schema on stdout.
db-cid db
Prints the cluster ID, which is a UUID that identifies the cluster, for db. If db
is a database newly created by ovsdb-tool cluster-join that has not yet
successfully joined its cluster, and --cid was not specified on the cluster-join
command line, then this command will output an error, and exit with status 2,
because the cluster ID is not yet known. This command works only with clustered
databases.
The all-zeros UUID is not a valid cluster ID.
db-sid db
Prints the server ID, which is a UUID that identifies the server, for db. This
command works only with clustered databases. It works even if db is a database
newly created by ovsdb-tool cluster-join that has not yet successfully joined its
cluster.
db-local-address db
Prints the local address used for database clustering for db, in the same
protocol:ip:port form used on create-cluster and join-cluster.
db-is-clustered db
db-is-standalone db
Tests whether db is a database file in clustered or standalone format,
respectively. If so, exits with status 0; if not, exits with status 2. (Exit
status 1 indicates an error, e.g. db is not an OVSDB database or does not exist.)
OPTIONS
Logging Options
-v[spec]
--verbose=[spec]
Sets logging levels. Without any spec, sets the log level for every module and
destination to dbg. Otherwise, spec is a list of words separated by spaces or
commas or colons, up to one from each category below:
• A valid module name, as displayed by the vlog/list command on ovs-appctl(8),
limits the log level change to the specified module.
• syslog, console, or file, to limit the log level change to only to the
system log, to the console, or to a file, respectively. (If --detach is
specified, ovsdb-tool closes its standard file descriptors, so logging to
the console will have no effect.)
On Windows platform, syslog is accepted as a word and is only useful along
with the --syslog-target option (the word has no effect otherwise).
• off, emer, err, warn, info, or dbg, to control the log level. Messages of
the given severity or higher will be logged, and messages of lower severity
will be filtered out. off filters out all messages. See ovs-appctl(8) for
a definition of each log level.
Case is not significant within spec.
Regardless of the log levels set for file, logging to a file will not take place
unless --log-file is also specified (see below).
For compatibility with older versions of OVS, any is accepted as a word but has no
effect.
-v
--verbose
Sets the maximum logging verbosity level, equivalent to --verbose=dbg.
-vPATTERN:destination:pattern
--verbose=PATTERN:destination:pattern
Sets the log pattern for destination to pattern. Refer to ovs-appctl(8) for a
description of the valid syntax for pattern.
-vFACILITY:facility
--verbose=FACILITY:facility
Sets the RFC5424 facility of the log message. facility can be one of kern, user,
mail, daemon, auth, syslog, lpr, news, uucp, clock, ftp, ntp, audit, alert, clock2,
local0, local1, local2, local3, local4, local5, local6 or local7. If this option is
not specified, daemon is used as the default for the local system syslog and local0
is used while sending a message to the target provided via the --syslog-target
option.
--log-file[=file]
Enables logging to a file. If file is specified, then it is used as the exact name
for the log file. The default log file name used if file is omitted is
/var/log/openvswitch/ovsdb-tool.log.
--syslog-target=host:port
Send syslog messages to UDP port on host, in addition to the system syslog. The
host must be a numerical IP address, not a hostname.
--syslog-method=method
Specify method how syslog messages should be sent to syslog daemon. Following
forms are supported:
• libc, use libc syslog() function. Downside of using this options is that
libc adds fixed prefix to every message before it is actually sent to the
syslog daemon over /dev/log UNIX domain socket.
• unix:file, use UNIX domain socket directly. It is possible to specify
arbitrary message format with this option. However, rsyslogd 8.9 and older
versions use hard coded parser function anyway that limits UNIX domain
socket use. If you want to use arbitrary message format with older rsyslogd
versions, then use UDP socket to localhost IP address instead.
• udp:ip:port, use UDP socket. With this method it is possible to use
arbitrary message format also with older rsyslogd. When sending syslog
messages over UDP socket extra precaution needs to be taken into account,
for example, syslog daemon needs to be configured to listen on the specified
UDP port, accidental iptables rules could be interfering with local syslog
traffic and there are some security considerations that apply to UDP
sockets, but do not apply to UNIX domain sockets.
• null, discards all messages logged to syslog.
The default is taken from the OVS_SYSLOG_METHOD environment variable; if it is
unset, the default is libc.
Other Options
-h
--help Prints a brief help message to the console.
-V
--version
Prints version information to the console.
FILES
The default db is /etc/openvswitch/conf.db. The default schema is
/usr/share/openvswitch/vswitch.ovsschema. The help command also displays these defaults.
SEE ALSO
ovsdb(7), ovsdb-server(1), ovsdb-client(1).