seperated updating database from regular usage

README.md

@@ -34,7 +34,7 @@ Setup a cronjob on the admin node.
 ```shell
 $ crontab -u root -e
 # Track Node State Every Minute
-* * * * * (/usr/bin/tracknodes >/dev/null 2>&1)
+* * * * * (/usr/bin/tracknodes --update >/dev/null 2>&1)
 ```
 
 Use the below command to see the history of node changes.
@@ -51,6 +51,22 @@ n021 | 2016-11-26 19:00:01 | offline,down | 'DIMM Configuration Error'
 -- --
 ```
 
+Use --help to show all options.
+
+```shell
+$ tracknodes --help
+Usage: tracknodes [options]
+
+Options:
+  -h, --help            show this help message and exit
+  -U, --update          Update Database From PBS
+  -f DBFILE, --dbfile=DBFILE
+                        SQL-Lite Database File
+  -c PBSNODESCMD, --pbsnodes_cmd=PBSNODESCMD
+                        pbsnodes binary location, example: /opt/pbsnodes
+  -v, --verbose         Verbose Output
+```
+
 License
 =======
 

lib/tracknodes/cli.py

@@ -1,4 +1,5 @@
 """ Command Line Interface Module """
+import optparse
 from tracknodes import TrackNodes
 
 
@@ -7,9 +8,32 @@ class Cli(object):
 
     def __init__(self):
         """ Setup Arguments and Options for CLI """
-        pass
+        parser = optparse.OptionParser()
+        parser.add_option("-U", "--update", dest="update",
+                          help="Update Database From PBS",
+                          metavar="UPDATE",
+                          action="store_true",
+                          default=False)
+        parser.add_option("-f", "--dbfile", dest="dbfile",
+                          help="SQL-Lite Database File",
+                          metavar="DBFILE",
+                          default=None)
+        parser.add_option("-c", "--pbsnodes_cmd", dest="pbsnodes_cmd",
+                          help="pbsnodes binary location, example: /opt/pbsnodes",
+                          metavar="PBSNODESCMD",
+                          default="pbsnodes")
+        parser.add_option("-v", "--verbose", dest="verbose",
+                          help="Verbose Output",
+                          metavar="VERBOSE",
+                          action="store_true",
+                          default=False)
+        (options, args) = parser.parse_args()
+        self.update = options.update
+        self.pbsnodes_cmd = options.pbsnodes_cmd
+        self.dbfile = options.dbfile
+        self.verbose = options.verbose
 
     def run(self):
         """ EntryPoint Of Application """
-        pbsnodes = TrackNodes()
+        pbsnodes = TrackNodes(update=self.update, dbfile=self.dbfile, pbsnodes_cmd=self.pbsnodes_cmd, verbose=self.verbose)
         pbsnodes.print_history()

lib/tracknodes/tracknodes.py

@@ -5,7 +5,7 @@
 
 
 class TrackNodes:
-    def __init__(self, dbfile=None, pbsnodes_cmd=None, verbose=False):
+    def __init__(self, update=False, dbfile=None, pbsnodes_cmd=None, verbose=False):
         """
         Create initial sqlite database and initialize connection
         """
@@ -14,7 +14,7 @@ def __init__(self, dbfile=None, pbsnodes_cmd=None, verbose=False):
         self.current_failed = []
 
         self.dbfile = dbfile
-        self.pbsnodes_cmd = pbsnodes_cmd
+        self.pbsnodes_cmd = TrackNodes.which(pbsnodes_cmd)
         self.verbose = verbose
 
         # Look for pbsnodes as option, in PATH, then specific locations
@@ -50,9 +50,11 @@ def __init__(self, dbfile=None, pbsnodes_cmd=None, verbose=False):
                 self.cur.execute("CREATE TABLE NodeStates(Name TEXT, State INT, Comment TEXT, Time TEXT)")
                 self.con.commit()
 
-            self.parse_pbsnodes()
-            self.online_nodes()
-            self.fail_nodes()
+            # Get Latest Node Information, Update Database
+            if update:
+                self.parse_pbsnodes()
+                self.online_nodes()
+                self.fail_nodes()
 
     def online_nodes(self):
         """