MDATA-GET(8) Metadata Commands MDATA-GET(8)

NAME

mdata-get -- Fetch the value of a metadata key-value pair.

SYNOPSIS

/usr/sbin/mdata-get keyname

DESCRIPTION

The mdata-get command allows the user (or a script) to query the metadata
for a guest instance running in a TritonDataCenter (TDC) cloud. Metadata
values are generally set programmatically via CloudAPI, or during
interactive provisioning via a Web Portal. They may also be set from
within the instance with the mdata-put command.


The value of the requested keyname will be printed to stdout. If the
metadata service is unavailable at the time of the request, this command
will block waiting for it to become available. Non-transient failures,
such as the non-existence of the requested keyname, will cause the
program to exit with a non-zero status. Depending on the nature of the
error, some diagnostic output may be printed to stderr.

EXIT STATUS

The following exit values are returned:


0
Successful completion.

The requested keyname was available, and its value was emitted to
stdout.


1
Metadata value not found.

The requested keyname was not found in the metadata.


2
An error occurred.

An unexpected error condition occurred, which is believed to be a
non-transient condition. Retrying the request is not expected to
resolve the error condition; either a software bug or
misconfiguration exists.


3
A usage error occurred.

Malformed arguments were passed to the program. Check the usage
instructions to ensure valid arguments are supplied.

SEE ALSO

mdata-delete(8), mdata-list(8), mdata-put(8)

TritonDataCenter May 2023 MDATA-GET(8)