Add import of json files

This simply takes any json files present and loads them into Grafana
directly.  The idea is that you can edit the dashboards using the
inbuilt editor, then copy the dashboard JSON and keep it externally
version controlled.  No parsing or validation is done on the JSON
files; we are assuming they have not been hand-modified from what
Grafana generates.

Change-Id: I38695aed2404f8b7fc350d949b7a9212498c35cb

README.rst

@@ -52,6 +52,11 @@ For example, here is a minimal dashboard specification
 environments.  Users can specify their dashboards via a normal review
 process and tests can validate their correctness.
 
+The tool can also take JSON manually exported from the Grafana
+interface and load it as a dashboard.  This allows keeping dashboards
+that have been edited with the inbuilt editor externally version
+controlled.
+
 A large number of examples are available in the OpenStack
 `project-config
 <https://git.openstack.org/cgit/openstack-infra/project-config/tree/grafana>`__

doc/source/grafana-dashboard.rst

@@ -38,7 +38,8 @@ Update Command
 
 ``grafana-dashboard`` [options] update <path>
 
-Updates each specified dashboard to the lastest layout from parsed yaml files.
+Updates each specified dashboard to the lastest layout from parsed
+yaml or json files.
 
 FILES
 =====

grafana_dashboards/builder.py

@@ -51,7 +51,8 @@ class Builder(object):
                 files_to_process.extend([os.path.join(path, f)
                                          for f in os.listdir(path)
                                          if (f.endswith('.yaml')
-                                             or f.endswith('.yml'))])
+                                             or f.endswith('.yml')
+                                             or f.endswith('.json'))])
             else:
                 files_to_process.append(path)
 

grafana_dashboards/parser.py

@@ -50,21 +50,29 @@ class YamlParser(object):
 
     def parse_fp(self, fp):
         data = yaml.safe_load(fp)
-        result = self.validate(data)
-        for item in result.items():
-            group = self.data.get(item[0], {})
-            # Create slug to make it easier to find dashboards.
-            if item[0] == 'dashboard':
-                name = item[1]['title']
-            else:
-                name = item[1]['name']
-            slug = slugify(name)
-            if slug in group:
-                raise Exception(
-                    "Duplicate {0} found in '{1}: '{2}' "
-                    "already defined".format(item[0], fp.name, name))
-            group[slug] = item[1]
-            self.data[item[0]] = group
+        # Since a json file is valid YAML, we just pass through
+        # any JSON files
+        if fp.name.endswith('.json'):
+            slug = slugify(data['title'])
+            if not self.data.get('dashboard'):
+                self.data['dashboard'] = {}
+            self.data['dashboard'][slug] = data
+        else:
+            result = self.validate(data)
+            for item in result.items():
+                group = self.data.get(item[0], {})
+                # Create slug to make it easier to find dashboards.
+                if item[0] == 'dashboard':
+                    name = item[1]['title']
+                else:
+                    name = item[1]['name']
+                slug = slugify(name)
+                if slug in group:
+                    raise Exception(
+                        "Duplicate {0} found in '{1}: '{2}' "
+                        "already defined".format(item[0], fp.name, name))
+                group[slug] = item[1]
+                self.data[item[0]] = group
 
     def validate(self, data):
         schema = Schema()

tests/fixtures/parser/json-dashboard-0001.json

@@ -0,0 +1,141 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "gnetId": null,
+  "graphTooltip": 0,
+  "id": 38,
+  "links": [],
+  "panels": [
+    {
+      "aliasColors": {},
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "datasource": null,
+      "fieldConfig": {
+        "defaults": {
+          "custom": {}
+        },
+        "overrides": []
+      },
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
+        "h": 9,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "hiddenSeries": false,
+      "id": 2,
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": true,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "refId": "A",
+          "target": "stats.haproxy.balance_git_http.gitea01.opendev.org.bout"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Fresh update",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    }
+  ],
+  "schemaVersion": 25,
+  "style": "dark",
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {
+    "refresh_intervals": [
+      "10s",
+      "30s",
+      "1m",
+      "5m",
+      "15m",
+      "30m",
+      "1h",
+      "2h",
+      "1d"
+    ]
+  },
+  "timezone": "",
+  "title": "test json",
+  "uid": "M-GEcyWMk",
+  "version": 1
+}

tests/test_parser.py

@@ -100,3 +100,12 @@ class TestCaseParser(TestCase):
     def _get_empty_dashboard(self, name):
         res, md5 = self.parser.get_dashboard(name)
         self.assertEqual(res, None)
+
+    def test_parse_json(self):
+        path = os.path.join(
+            os.path.dirname(__file__),
+            'fixtures/parser/json-dashboard-0001.json')
+        self.parser.parse(path)
+        # Get parsed dashboard
+        res, md5 = self.parser.get_dashboard('test-json')
+        self.assertEqual(res['title'], 'test json')