graph.php: use JSON plugins instead of including PHP plugin files

A couple of big changes here. A lot of logic moved to graph.php.

The PHP plugin files have been rewritten to JSON. In these JSON files
*everything* is optional. Also *NOT* having a JSON plugin file won't
block you from having a graph. The JSON will just make the graphs
prettier (by having a title, y-axis title, legend, colors, etc..).

The Collectd types.db file is parsed and used to determine RRD content.
When things are not defined in the JSON it will fallback to a default.

1 files changed, 51 insertions, 0 deletions

diff --git a/plugin/nginx.json b/plugin/nginx.json
new file mode 100644
index 0000000..08e1d40
--- /dev/null
+++ b/plugin/nginx.json
@@ -0,0 +1,51 @@
+{
+        "connections": {
+                "title": "Nginx connections",
+                "vertical": "Connections/s",
+                "legend": {
+                        "accepted": {
+                                "name": "Accepted",
+                                "color": "ff0000"
+                        },
+                        "handled": {
+                                "name": "Handled",
+                                "color": "0000ff"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "nginx_connections": {
+                "title": "Nginx connection states",
+                "vertical": "Connections/s",
+                "legend": {
+                        "active": {
+                                "name": "Active",
+                                "color": "005d57"
+                        },
+                        "reading": {
+                                "name": "Reading",
+                                "color": "4444ff"
+                        },
+                        "waiting": {
+                                "name": "Waiting",
+                                "color": "f24ac8"
+                        },
+                        "writing": {
+                                "name": "Writing",
+                                "color": "00cf00"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "nginx_requests": {
+                "title": "Nginx requests",
+                "vertical": "Requests/s",
+                "legend": {
+                        "value": {
+                                "name": "Requests",
+                                "color": "00aa00"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        }
+}