MDATA-PUT(1m) Metadata Commands MDATA-PUT(1m)NAMEmdata-put-- Set the value of a metadata key-value pair.
/usr/sbin/mdata-put keyname [ value ]
The mdata-put command allows the user (or a script) to modify 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. The value of a key-
value pair may be obtained by passing its name to the mdata-get com‐
The key-value pair named keyname will be updated in the metadata store
for this instance. If a value argument is provided on the command-
line, then that value will be used. Otherwise, if stdin is not a tty,
the value will be read from stdin.
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.
The following exit values are returned:
The requested keyname was valid, and its value was updated.
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‐
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-get(1m), mdata-list(1m)Joyent SmartDataCenter October 2013 MDATA-PUT(1m)