The same Lua vm is now reused. After 5 minutes the vm is destroyed and
reloaded to prevent memory to grow too much. inotify is used to detected
changes in the filesystem (partially implemented, must implement a recursive
watch)
This optimizes periodic scripts calls by a 10x factor.
After the recent changes, there is only one global nDPI struct which
is share across all the interfaces. However, the struct can be swapped
during normal operating, so it's necessary to reload the associations
every time a new nDPI struct is allocated.
Fixes#3139
Switching the active network interface triggered a POST request, which
was interpreted by the active lua script as a configuration save request.
Now in case of interface switching a 302 redirection is performed to clear
the page state.
Fixes#3126
Plugins are a convenient way to group together related lua scripts.
Their primary use case is to group user scripts and their alert/status
definition.
The builtin ntopng user scripts and definitions are now
packed into plugins directories. In future, we will support loading of
user created plugins.
Plugins are loaded at startup into some runtime directories and then
used. Other changes provided by this commit include:
- Add sample flow logger plugin
- Initial support for system user scripts
- Rename edge to threshold
- Migrate system probes to user scripts/plugins
- Migrate scripts to more explicit alerts_api.checkThresholdAlert api
This provides a ~10x speedup by performing the JSON serialization work in C
(and thus avoiding Lua->C overhead). This also implements two in-memory alerts
queues (one for sqlite and one for the notifications) in order to reduce Redis load.
Alerts queue are now global instead of per-interface as there is only 1 dequeing thread.
