Changes between Initial Version and Version 1 of Internal/InventoryV3

Timestamp:

Sep 25, 2009, 9:55:28 PM (16 years ago)

Author:

ssugrim

Comment:

—

Internal/InventoryV3

@@ +1 @@
+James is working on a second generation inventory script.
+
+Currently on: Gatherer
+
+
+It's plan is to be simpler and less ambitious than it's predecessor, but still respect the sql table structure ("as much as possible.") 
+
+As I see it there should be 3 parts to this script:
+
+ 1. executer: runs either wget or apt-get install and copies the latest version of the other parts of the scripts then 
+    executes them
+ 1. gatherer: collects information using only  operating system based facilities (dmesg, lsusb, lspci, ifconfig, /sys).  
+ 1. Writer: checks the mysql repository for changes from the current state. If different changes them.
+
+
+The sql structure is a bit of a bit mess, the major tables of interest are:
+ 1. motherboards - List of things that can be connected to, has its own id used to tie other tables to it
+ 1. devices - List of deviced "connected" to mother boards 
+ 1. device_kinds - type identifier for connected devices (an attribute of a device). 
+ 1. locations - Converts x,y coordinates to a single integer that maps directly to a mother board.
+ 1. inventories - records the start and stop time of the inventory pass.
+
+A lot of the tables are full of unused colums. I guess we'll just ignore them for now. 
+The basic crux of an update should be the following:
+ 1. examine our IP to determine our current location
+ 1. We gather information about the mother board:
+  1. Disk Size (dmesg)
+  1. Memory Size (dmesg)
+ 1. Gather information about attached devices:
+  1. 2 wired Ethernet addresses (ifconfig, /sys)
+  1. 2 wireless Ethernet addresses (ifconfig, /sys)
+  1. any usb devices (lsusb, /sys)
+ 1. get the mother board id from the location table
+ 1. update mother board information if diffrent, and stamp with current inventory number
+ 1. update devices if diffrent and stamp with inventory number
+ 1. profit.
+
+----
+Gatherer:
+The disk size and memory size are a quick scan from dmesg. The disk size matches, but the memory size is a little off. It probably has to do with the way dmesg reports memory vs /sys reports memeory. It would be nice to find the /sys entry for consistency. 
+
+In /sys/devices/pci0000:00 are the sub directories correlated with the specific Ethernet hardware. In each directory that correlated to an Ethernet device there will be a symbolic link with the operating system name of the device. This will allow us to match up the pci address(name of the subdirectory of /sys/devices/pci0000:00) to the mac address (from ifconfig). lspci can tell us the associated pci address and a hardware identifier string. 
+