Feature to gather SNMP Walk, use as Pseudo Device, and Browse Objects

* fix anomalous name

* add gather worker

* fix encoding of binary storage

* store results back to job

* now parsing mbis report to translate

* fix the broken report parser

* rename gather to snapshot

* implement walk code copied from SNMP::Info

* can now bulkwalk and parse mibs report and store resolved walk in cache

* add func/glob aliasing broken

* better aliasing

* implement aliasing from globals and funcs

* fix regexp for matching netdisco-mibs report

* fake cache entry for all ND2 methods called, add comments

* also save to logs/snapshots/IP

* add doc for netdisco-do

* add is_pseudo column to device table

* support for loading cache for pseudo devices

* check for hrSystemUptime as well as sysUpTime for snmp connect

* display pseudo devices with yellow pill for name

* color all cells for layers for pseudo

* no need to b64 encode binary data in scalars as we b64 whole thing after

* tweaked uptime check

* store snapshot to database instead of Job

* expose snapshots in device details tab

* small ux improvements on snap download

* fixes for errors in subnet mask searching

* hide snapshot management for pseudo devices

* update to use new netdisco-mibs object cache

* update for new format oids file

* start of work on loading walk into db for browsing

* store values and meta

* add auto increment col and oid index to browser

* start web plugin for browser

* add virtual search for oid children

* have all oid in separte table (60 seconds load on my laptop)

* rename table and add relation

* store oid as int array

* fix sql for children

* make jstree start working

* working very slow tree expand

* fix to work when first displaying tree

* store both oid and oid_parts

* simplify SQL to speed up (more complicated perl)

* fix sql bug, add better index, prettify tree

* render the snmp node detail

* add node template, make scrollable, pretty print data values (insecure)

* store munge hint

* some dubious code to munge the data

* make sure to filter by IP on device_browser

* make safer the rendering of value data (but need to come back to key ordering)

* fix sorting on object values

* limit the opening of child nodes to keep response good and unclutter

* factor out the munge and make safer

* reject unknown mungers

* show the munger and option (not working) to change

* additional js for munge select

* complete custom munge

* change so that saving to database is only at CLI and on request

* hide snmp tab if no browser rows in the db

* add helpful message when no browser rows for the device

* stub handler for search and add recurse control

* working search

* minor ui fixes

* implement typeahead for leaf search

* limit rows in typeahead

* make sure device_browser is visited in delete and renumber

* add requirements for this branch

* update manifest

* make sure node search and typeahead are restricted to current device only

lib/App/Netdisco/Worker/Plugin/Discover/Properties.pm

@@ -61,7 +61,7 @@ register_worker({ phase => 'early', driver => 'snmp' }, sub {
   $device->set_column( last_discover => \'now()' );
 
   # protection for failed SNMP gather
-  if ($device->in_storage) {
+  if ($device->in_storage and not $device->is_pseudo) {
       my $ip = $device->ip;
       my $protect = setting('snmp_field_protection')->{'device'} || {};
       my %dirty = $device->get_dirty_columns;
@@ -199,7 +199,7 @@ register_worker({ phase => 'early', driver => 'snmp' }, sub {
   my $agg_ports      = $snmp->agg_ports;
 
   # clear the cached uptime and get a new one
-  my $dev_uptime = $snmp->load_uptime;
+  my $dev_uptime = ($device->is_pseudo ? $snmp->uptime : $snmp->load_uptime);
   if (!defined $dev_uptime) {
       error sprintf ' [%s] interfaces - Error! Failed to get uptime from device!',
         $device->ip;