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, 134 insertions, 0 deletions

diff --git a/plugin/postgresql.json b/plugin/postgresql.json
new file mode 100644
index 0000000..4e0181d
--- /dev/null
+++ b/plugin/postgresql.json
@@ -0,0 +1,134 @@
+{
+        "pg_blks": {
+                "title": "PostgreSQL Disk I/O ({{PI}})",
+                "vertical": "Blocks",
+                "type": "stacked",
+                "legend": {
+                        "heap_hit": {
+                                "name": "Heap hit"
+                        },
+                        "heap_read": {
+                                "name": "Heap read"
+                        },
+                        "idx_hit": {
+                                "name": "Index hit"
+                        },
+                        "idx_read": {
+                                "name": "Index read"
+                        },
+                        "tidx_hit": {
+                                "name": "Toast index hit"
+                        },
+                        "tidx_read": {
+                                "name": "Toast index read"
+                        },
+                        "toast_hit": {
+                                "name": "Toast hit"
+                        },
+                        "toast_read": {
+                                "name": "Toast read"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_db_size": {
+                "title": "PostgreSQL DB size ({{PI}})",
+                "vertical": "Bytes",
+                "type": "stacked",
+                "legend": {
+                        "value": {
+                                "name": "Size",
+                                "color": "0000ff"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_n_tup_c": {
+                "title": "PostgreSQL Row actions ({{PI}})",
+                "vertical": "Rows",
+                "type": "stacked",
+                "legend": {
+                        "ins": {
+                                "name": "Insert",
+                                "color": "00ff00"
+                        },
+                        "upd": {
+                                "name": "Update",
+                                "color": "ff7c00"
+                        },
+                        "hot_upd": {
+                                "name": "Hot Update",
+                                "color": "0000ff"
+                        },
+                        "del": {
+                                "name": "Delete",
+                                "color": "ff0000"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_n_tup_g": {
+                "title": "PostgreSQL Table states ({{PI}})",
+                "vertical": "Rows",
+                "type": "stacked",
+                "legend": {
+                        "live": {
+                                "name": "Live",
+                                "color": "00ff00"
+                        },
+                        "dead": {
+                                "name": "Dead",
+                                "color": "ff0000"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_numbackends": {
+                "title": "PostgreSQL Backends ({{PI}})",
+                "vertical": "Backends",
+                "type": "stacked",
+                "legend": {
+                        "value": {
+                                "name": "Backends",
+                                "color": "0000ff"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_scan": {
+                "title": "PostgreSQL Scans ({{PI}})",
+                "vertical": "Scans / Rows",
+                "type": "stacked",
+                "legend": {
+                        "seq": {
+                                "name": "Sequential"
+                        },
+                        "seq_tup_read": {
+                                "name": "Sequential rows"
+                        },
+                        "idx": {
+                                "name": "Index"
+                        },
+                        "idx_tup_fetch": {
+                                "name": "Index Rows"
+                        }
+                },
+                "legend_format": "%5.1lf%s"
+        },
+        "pg_xact": {
+                "title": "PostgreSQL Transactions ({{PI}})",
+                "vertical": "Transactions",
+                "type": "stacked",
+                "legend": {
+                        "commit": {
+                                "name": "Commit",
+                                "color": "00ff00"
+                        },
+                        "rollback": {
+                                "name": "Rollback",
+                                "color": "ff0000"
+                        }
+                },
+                "legend_format": "%5.1lf"
+        }
+}