MDATA-GET(1m) Metadata Commands MDATA-GET(1m)NAMEmdata-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 meta‐
data for a guest instance running in a SmartDataCenter (SDC) 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 com‐
mand 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 misconfigu‐
ration exists.
3
A usage error occurred.
Malformed arguments were passed to the program. Check the usage
instructions to ensure valid arguments are supplied.
SEE ALSOmdata-delete(1m), mdata-list(1m), mdata-put(1m)Joyent SmartDataCenter October 2013 MDATA-GET(1m)
