.TP
.BI "-n" nodefile ", --nodes=" nodefile
The name of the file holding node information (if not collecting via
-RAPI), instead of the default
-.I nodes
-file.
+RAPI), instead of the default \fInodes\fR file (but see below how to
+customize the default value via the environment).
.TP
.BI "-i" instancefile ", --instances=" instancefile
The name of the file holding instance information (if not collecting
-via RAPI), instead of the default
-.I instances
-file.
+via RAPI), instead of the default \fIinstances\fR file (but see below
+how to customize the default value via the environment).
.TP
.BI "-m" cluster
Collect data not from files but directly from the
.I cluster
-given as an argument via RAPI. This work for both Ganeti 1.2 and
-Ganeti 2.0.
+given as an argument via RAPI. If the argument doesn't contain a colon
+(:), then it is converted into a fully-built URL via prepending
+https:// and appending the default RAPI port, otherwise it's
+considered a fully-specified URL and is used unchanged.
.TP
.BI "-d" DEPTH ", --depth=" DEPTH
The exist status of the command will be zero, unless for some reason
the algorithm fatally failed (e.g. wrong node or instance data).
+.SH ENVIRONMENT
+
+If the variables \fBHTOOLS_NODES\fR and \fBHTOOLS_INSTANCES\fR are
+present in the environment, they will override the default names for
+the nodes and instances files. These will have of course no effect
+when RAPI is used.
+
.SH BUGS
The program does not check its input data for consistency, and aborts