ovsdb-client(1)              Open vSwitch Manual             ovsdb-client(1)

NAME         top

       ovsdb-client - command-line interface to ovsdb-server(1)

SYNOPSIS         top

       ovsdb-client [options] list-dbs [server]
       ovsdb-client [options] get-schema [server] [database]
       ovsdb-client [options] get-schema-version [server] [database]
       ovsdb-client [options] list-tables [server] [database]
       ovsdb-client [options] list-columns [server] [database] [table]
       ovsdb-client [options] transact [server] transaction
       ovsdb-client [options] dump [server] [database] [table [column...]]
       ovsdb-client [options] monitor [server] [database] table
       ovsdb-client [options] monitor [server] [database] ALL
       ovsdb-client [options] monitor-cond [server] [database] conditions
       table [column[,column]...]...
       ovsdb-client [options] lock [server] lock
       ovsdb-client [options] steal [server] lock
       ovsdb-client [options] unlock [server] lock
       ovsdb-client help

       Output formatting options:
              [--format=format] [--data=format] [--no-headings] [--pretty]
              [--bare] [--timestamp]

       Daemon options:
              [--pidfile[=pidfile]] [--overwrite-pidfile] [--detach]
              [--no-chdir] [--no-self-confinement]

       Logging options:

       Public key infrastructure options:

       SSL connection options:

       Common options:
              [-h | --help] [-V | --version]

DESCRIPTION         top

       The ovsdb-client program is a command-line client for interacting
       with a running ovsdb-server process.  Each command connects to an
       OVSDB server, which is unix:/usr/local/var/run/openvswitch/db.sock by
       default, or may be specified as server in one of the following forms:

                     The given SSL or plain TCP port on the host at the
                     given ip, which must be expressed as an IP address (not
                     a DNS name) in IPv4 or IPv6 address format.  If ip is
                     an IPv6 address, then wrap ip with square brackets,
                     e.g.: ssl:[::1]:6640.  On Linux, use %device to
                     designate a scope for IPv6 link-level addresses, e.g.
                     ssl:[fe80::1234%eth0]:6653.  For ssl, the
                     --private-key, --certificate, and --ca-cert options are

                     On POSIX, connect to the Unix domain server socket
                     named file.

                     On Windows, connect to a local named pipe that is
                     represented by a file created in the path file to mimic
                     the behavior of a Unix domain socket.

                     Listen on the given SSL or TCP port for a connection.
                     By default, connections are not bound to a particular
                     local IP address and it listens only on IPv4 (but not
                     IPv6) addresses, but specifying ip limits connections
                     to those from the given ip, either IPv4 or IPv6
                     address.  If ip is an IPv6 address, then wrap ip with
                     square brackets, e.g.: pssl:6640:[::1].  On Linux, use
                     %device to designate a scope for IPv6 link-level
                     addresses, e.g. pssl:6653:[fe80::1234%eth0].  For pssl,
                     the --private-key, --certificate, and --ca-cert options
                     are mandatory.

                     On POSIX, listen on the Unix domain server socket named
                     file for a connection.

                     On Windows, listen on a local named pipe.  A file is
                     created in the path file to mimic the behavior of a
                     Unix domain socket.

       The default database is Open_vSwitch.

       The following commands are implemented:

       list-dbs [server]
              Connects to server, retrieves the list of known databases, and
              prints them one per line.  These database names are the ones
              that may be used for database in the following commands.

       get-schema [server] [database]
              Connects to server, retrieves the schema for database, and
              prints it in JSON format.

       get-schema-version [server] [database]
              Connects to server, retrieves the schema for database, and
              prints its version number on stdout.  A schema version number
              has the form x.y.z.  See ovs-vswitchd.conf.db(5) for details.

              Schema version numbers and Open vSwitch version numbers are

              If database was created before schema versioning was
              introduced, then it will not have a version number and this
              command will print a blank line.

       list-tables [server] [database]
              Connects to server, retrieves the schema for database, and
              prints a table listing the name of each table within the

       list-columns [server] [database] table
              Connects to server, retrieves the schema for database, and
              prints a table listing the name and type of each column.  If
              table is specified, only columns in that table are listed;
              otherwise, the tables include columns in all tables.

       transact [server] transaction
              Connects to server, sends it the specified transaction, which
              must be a JSON array containing one or more valid OVSDB
              operations, and prints the received reply on stdout.

       dump [server] [database] [table [column...]]
              Connects to server, retrieves all of the data in database, and
              prints it on stdout as a series of tables. If table is
              specified, only that table is retrieved.  If at least one
              column is specified, only those columns are retrieved.

       monitor [server] [database] table [column[,column]...]...
       monitor-cond [server] [database] conditions table
              Connects to server and monitors the contents of rows that
              match conditions in table in database. By default, the initial
              contents of table are printed, followed by each change as it
              occurs.  If conditions empty, all rows will be monitored. If
              at least one column is specified, only those columns are
              monitored.  The following column names have special meanings:

                     Do not print the initial contents of the specified

                     Do not print newly inserted rows.

                     Do not print deleted rows.

                     Do not print modifications to existing rows.

              Multiple [column[,column]...] groups may be specified as
              separate arguments, e.g. to apply different reporting
              parameters to each group.  Whether multiple groups or only a
              single group is specified, any given column may only be
              mentioned once on the command line.

              conditions is a JSON array of <condition> as defined in RFC
              7047 5.1 with the following change: A condition can be either
              a 3-element JSON array as deescribed in the RFC or a boolean

              If --detach is used with monitor or monitor-cond, then
              ovsdb-client detaches after it has successfully received and
              printed the initial contents of table.

              The monitor command uses RFC 7047 "monitor" method to open a
              monitor session with the server. The monitor-cond command uses
              RFC 7047 extension "monitor_cond" method. See ovsdb-server(1)
              for details.

       monitor [server] [database] ALL
              Connects to server and monitors the contents of all tables in
              database.  Prints initial values and all kinds of changes to
              all columns in the database.  The --detach option causes
              ovsdb-client to detach after it successfully receives and
              prints the initial database contents.

              The monitor command uses RFC 7047 "monitor" method to open a
              monitor session with the server.


       The following commands are mostly of interest for testing the
       correctness of the OVSDB server.

       ovsdb-client [options] lock [server] lock
       ovsdb-client [options] steal [server] lock
       ovsdb-client [options] unlock [server] lock
              Connects to server and issues corresponding RFC 7047 lock
              operations on lock. Prints json reply or subsequent update
              messages.  The --detach option causes ovsdb-client to detach
              after it successfully receives and prints the initial reply.

              When running with the --detach option, lock, steal, unlock and
              exit commands can be issued by using ovs-appctl. exit command
              causes the ovsdb-client to close its ovsdb-server connection
              before exit.  The lock, steal and unlock commands can be used
              to issue additional lock operations over the same ovsdb-server
              connection. All above commands take a single lock argument,
              which does not have to be the same as the lock that
              ovsdb-client started with.

OPTIONS         top

   Output Formatting Options
       Much of the output from ovsdb-client is in the form of tables.  The
       following options controlling output formatting:

       -f format
              Sets the type of table formatting.  The following types of
              format are available:

              table (default)
                     2-D text tables with aligned columns.

              list   A list with one column per line and rows separated by a
                     blank line.

              html   HTML tables.

              csv    Comma-separated values as defined in RFC 4180.

              json   JSON format as defined in RFC 4627.  The output is a
                     sequence of JSON objects, each of which corresponds to
                     one table.  Each JSON object has the following members
                     with the noted values:

                            The table's caption.  This member is omitted if
                            the table has no caption.

                            An array with one element per table column.
                            Each array element is a string giving the
                            corresponding column's heading.

                     data   An array with one element per table row.  Each
                            element is also an array with one element per
                            table column.  The elements of this second-level
                            array are the cells that constitute the table.
                            Cells that represent OVSDB data or data types
                            are expressed in the format described in the
                            OVSDB specification; other cells are simply
                            expressed as text strings.

       -d format
              Sets the formatting for cells within output tables unless the
              table format is set to json, in which case json formatting is
              always used when formatting cells.  The following types of
              format are available:

              string (default)
                     The simple format described in the Database Values
                     section of ovs-vsctl(8).

              bare   The simple format with punctuation stripped off: [] and
                     {} are omitted around sets, maps, and empty columns,
                     items within sets and maps are space-separated, and
                     strings are never quoted.  This format may be easier
                     for scripts to parse.

              json   The RFC 4627 JSON format as described above.

              This option suppresses the heading row that otherwise appears
              in the first row of table output.

              By default, JSON in output is printed as compactly as
              possible.  This option causes JSON in output to be printed in
              a more readable fashion.  Members of objects and elements of
              arrays are printed one per line, with indentation.

              This option does not affect JSON in tables, which is always
              printed compactly.

       --bare Equivalent to --format=list --data=bare --no-headings.

              For the monitor and monitor-cond commands, add a timestamp to
              each table update.  Most output formats add the timestamp on a
              line of its own just above the table.  The JSON output format
              puts the timestamp in a member of the top-level JSON object
              named time.

   Daemon Options
       The daemon options apply only to the monitor and monitor-cond
       commands.  With any other command, they have no effect.

       The following options are valid on POSIX based platforms.

              Causes a file (by default, to be created
              indicating the PID of the running process.  If the pidfile
              argument is not specified, or if it does not begin with /,
              then it is created in /usr/local/var/run/openvswitch.

              If --pidfile is not specified, no pidfile is created.

              By default, when --pidfile is specified and the specified
              pidfile already exists and is locked by a running process,
              ovsdb-client refuses to start.  Specify --overwrite-pidfile to
              cause it to instead overwrite the pidfile.

              When --pidfile is not specified, this option has no effect.

              Runs ovsdb-client as a background process.  The process forks,
              and in the child it starts a new session, closes the standard
              file descriptors (which has the side effect of disabling
              logging to the console), and changes its current directory to
              the root (unless --no-chdir is specified).  After the child
              completes its initialization, the parent exits.

              Creates an additional process to monitor the ovsdb-client
              daemon.  If the daemon dies due to a signal that indicates a
              programming error (SIGABRT, SIGALRM, SIGBUS, SIGFPE, SIGILL,
              SIGPIPE, SIGSEGV, SIGXCPU, or SIGXFSZ) then the monitor
              process starts a new copy of it.  If the daemon dies or exits
              for another reason, the monitor process exits.

              This option is normally used with --detach, but it also
              functions without it.

              By default, when --detach is specified, ovsdb-client changes
              its current working directory to the root directory after it
              detaches.  Otherwise, invoking ovsdb-client from a carelessly
              chosen directory would prevent the administrator from
              unmounting the file system that holds that directory.

              Specifying --no-chdir suppresses this behavior, preventing
              ovsdb-client from changing its current working directory.
              This may be useful for collecting core files, since it is
              common behavior to write core dumps into the current working
              directory and the root directory is not a good directory to

              This option has no effect when --detach is not specified.

              By default daemon will try to self-confine itself to work with
              files under well-know, at build-time whitelisted directories.
              It is better to stick with this default behavior and not to
              use this flag unless some other Access Control is used to
              confine daemon.  Note that in contrast to other access control
              implementations that are typically enforced from kernel-space
              (e.g. DAC or MAC), self-confinement is imposed from the user-
              space daemon itself and hence should not be considered as a
              full confinement strategy, but instead should be viewed as an
              additional layer of security.

       --user Causes ovsdb-client to run as a different user specified in
              "user:group", thus dropping most of the root privileges. Short
              forms "user" and ":group" are also allowed, with current user
              or group are assumed respectively. Only daemons started by the
              root user accepts this argument.

              On Linux, daemons will be granted CAP_IPC_LOCK and
              CAP_NET_BIND_SERVICES before dropping root privileges. Daemons
              that interact with a datapath, such as ovs-vswitchd, will be
              granted two additional capabilities, namely CAP_NET_ADMIN and
              CAP_NET_RAW. The capability change will apply even if new user
              is "root".

              On Windows, this option is not currently supported. For
              security reasons, specifying this option will cause the daemon
              process not to start.

   Logging Options
              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-client 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

              For compatibility with older versions of OVS, any is accepted
              as a word but has no effect.

              Sets the maximum logging verbosity level, equivalent to

              Sets the log pattern for destination to pattern.  Refer to
              ovs-appctl(8) for a description of the valid syntax for

              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.

              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

              Send syslog messages to UDP port on host, in addition to the
              system syslog.  The host must be a numerical IP address, not a

              Specify method how syslog messages should be sent to syslog
              daemon.  Following forms are supported:

              ·      libc, use libc syslog() function.  This is the default
                     behavior.  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

   Public Key Infrastructure Options
       -p privkey.pem
              Specifies a PEM file containing the private key used as
              ovsdb-client's identity for outgoing SSL connections.

       -c cert.pem
              Specifies a PEM file containing a certificate that certifies
              the private key specified on -p or --private-key to be
              trustworthy.  The certificate must be signed by the
              certificate authority (CA) that the peer in SSL connections
              will use to verify it.

       -C cacert.pem
              Specifies a PEM file containing the CA certificate that
              ovsdb-client should use to verify certificates presented to it
              by SSL peers.  (This may be the same certificate that SSL
              peers use to verify the certificate specified on -c or
              --certificate, or it may be a different one, depending on the
              PKI design in use.)

       -C none
              Disables verification of certificates presented by SSL peers.
              This introduces a security risk, because it means that
              certificates cannot be verified to be those of known trusted

              When cacert.pem exists, this option has the same effect as -C
              or --ca-cert.  If it does not exist, then ovsdb-client will
              attempt to obtain the CA certificate from the SSL peer on its
              first SSL connection and save it to the named PEM file.  If it
              is successful, it will immediately drop the connection and
              reconnect, and from then on all SSL connections must be
              authenticated by a certificate signed by the CA certificate
              thus obtained.

              This option exposes the SSL connection to a man-in-the-middle
              attack obtaining the initial CA certificate, but it may be
              useful for bootstrapping.

              This option is only useful if the SSL peer sends its CA
              certificate as part of the SSL certificate chain.  The SSL
              protocol does not require the server to send the CA

              This option is mutually exclusive with -C and --ca-cert.

   SSL Connection Options
              Specifies, in a comma- or space-delimited list, the SSL
              protocols ovsdb-client will enable for SSL connections.
              Supported protocols include TLSv1, TLSv1.1, and TLSv1.2.
              Regardless of order, the highest protocol supported by both
              sides will be chosen when making the connection.  The default
              when this option is omitted is TLSv1,TLSv1.1,TLSv1.2.

              Specifies, in OpenSSL cipher string format, the ciphers
              ovsdb-client will support for SSL connections.  The default
              when this option is omitted is HIGH:!aNULL:!MD5.

   Other Options
       --help Prints a brief help message to the console.

              Prints version information to the console.

SEE ALSO         top

       ovsdb-server(1), ovsdb-client(1), and the OVSDB specification.

COLOPHON         top

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Open vSwitch                       2.8.90                    ovsdb-client(1)

Pages that refer to this page: ovsdb-client(1)ovsdb-server(1)ovsdb-tool(1)