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, 67 insertions, 0 deletions

diff --git a/plugin/disk.json b/plugin/disk.json
new file mode 100644
index 0000000..2d14715
--- /dev/null
+++ b/plugin/disk.json
@@ -0,0 +1,67 @@
+{
+        "disk_merged": {
+                "title": "Disk Merged Operations ({{PI}})",
+                "vertical": "Merged operations/s",
+                "type": "io",
+                "legend": {
+                        "read": {
+                                "name": "Read",
+                                "color": "0000ff"
+                        },
+                        "write": {
+                                "name": "Write",
+                                "color": "00b000"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "disk_octets": {
+                "title": "Disk Traffic ({{PI}})",
+                "vertical": "Bytes per second",
+                "type": "io",
+                "legend": {
+                        "read": {
+                                "name": "Read",
+                                "color": "0000ff"
+                        },
+                        "write": {
+                                "name": "Write",
+                                "color": "00b000"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "disk_ops": {
+                "title": "Disk Operations ({{PI}})",
+                "vertical": "Ops per second",
+                "type": "io",
+                "legend": {
+                        "read": {
+                                "name": "Read",
+                                "color": "0000ff"
+                        },
+                        "write": {
+                                "name": "Write",
+                                "color": "00b000"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "disk_time": {
+                "title": "Disk time per operation ({{PI}})",
+                "vertical": "Avg. Time/Op",
+                "type": "io",
+                "legend": {
+                        "read": {
+                                "name": "Read",
+                                "color": "0000ff"
+                        },
+                        "write": {
+                                "name": "Write",
+                                "color": "00b000"
+                        }
+                },
+                "legend_format": "%5.1lf%ss",
+                "scale": 0.001
+        }
+}