vtctl - vtctl Topo Command Reference - 《Vitess v18.0 Documentation》

vtctl Topo Command Reference

The following vtctl commands are available for administering Topology Services.

Commands

Retrieves the file(s) at <path> from the topo service, and displays it. It can resolve wildcards, and decode the proto-encoded data.

TopoCat -- [--cell <cell>] [--decode_proto] [--long] <path> [<path>...]

Name	Type	Definition
cell	string	topology cell to cat the file from. Defaults to global cell.
decode_proto	Boolean	decode proto files and display them as text. Defaults to false.
decode_proto_json	Boolean	decode proto files and display them as json. Defaults to false.
long	Boolean	long listing. Defaults to false.

<cell> – Required. A cell is a location for a service. Generally, a cell resides in only one cluster. In Vitess, the terms “cell” and “data center” are interchangeable. The argument value is a string that does not contain whitespace.
<path> – Required.
<path>. – Optional.

<TopoCat>: no path specified. This error occurs if the command is not called with at least one argument.
<TopoCat>: invalid wildcards. If you send paths that don’t contain any wildcard and don’t exist.
<TopoCat>: some paths had errors. If there is an error getting node data for given paths.

Copy data at given path from topo service to local file or vice versa.

TopoCp -- [--cell <cell>] [--to_topo] <src> <dst>

Name	Type	Definition
cell	string	topology cell to use for the copy. Defaults to global cell.
to_topo	Boolean	copies from local server to topo instead (reverse direction). Defaults to false.

<cell> – Required. A cell is a location for a service. Generally, a cell resides in only one cluster. In Vitess, the terms “cell” and “data center” are interchangeable. The argument value is a string that does not contain whitespace.
<src> – Required. Source from which data needs to be copied. It can be local file or some path in topo service, depedning on if to_topo is specified.
<dst>. – Required. Destination to which data will be copied. It can be local file or some path in topo service, depedning on if to_topo is specified.

<TopoCp>: need source and destination. This error occurs if the command is not called with proper src and dst.