Make luci-app-statistics graphs public

according to this issue https://github.com/openwrt/luci/issues/4375

this feature was removed

You've configured luci-app-statistics to your liking and now you want to share the charts.

One way is to serve them via LuCI but without authentication:

1. create /usr/lib/lua/luci/controller/public_stats.lua with the following content:
   

   module("luci.controller.public_stats", package.seeall)
   
   function index()
       assign({"graph"}, {"admin", "statistics", "graph"}, nil)
   end

2. wipe out some caches that are now stale: rm -rf /tmp/luci-indexcache /tmp/luci-modulecache/
3. log out from LuCI if you're still logged in
4. visit http://192.168.1.1/cgi-bin/luci/graph
5. add /usr/lib/lua/luci/controller/public_stats.lua to /etc/sysupgrade.conf so it survives upgrades

“Graph” will now appear in the page footer, including on the login page, so you shouldn't need a custom index.

Another way might be to use a collectd network output plugin and log the data to a more powerful remote host running something like Cacti.

(Thanks to jow for these instructions.)