1 files changed, 143 insertions, 0 deletions
diff --git a/vnfs/DAaaS/prometheus-operator/hack/sync_grafana_dashboards.py b/vnfs/DAaaS/prometheus-operator/hack/sync_grafana_dashboards.py
new file mode 100755
index 00000000..f548d0b7
--- /dev/null
+++ b/vnfs/DAaaS/prometheus-operator/hack/sync_grafana_dashboards.py
@@ -0,0 +1,143 @@
+#!/usr/bin/env python3
+"""Fetch dashboards from provided urls into this chart."""
+import json
+import textwrap
+from os import makedirs, path
+
+import requests
+import yaml
+from yaml.representer import SafeRepresenter
+
+
+# https://stackoverflow.com/a/20863889/961092
+class LiteralStr(str):
+    pass
+
+
+def change_style(style, representer):
+    def new_representer(dumper, data):
+        scalar = representer(dumper, data)
+        scalar.style = style
+        return scalar
+
+    return new_representer
+
+
+# Source files list
+charts = [
+    {
+        'source': 'https://raw.githubusercontent.com/coreos/prometheus-operator/master/contrib/kube-prometheus/manifests/grafana-dashboardDefinitions.yaml',
+        'destination': '../templates/grafana/dashboards',
+        'type': 'yaml',
+    },
+    {
+        'source': 'https://raw.githubusercontent.com/etcd-io/etcd/master/Documentation/op-guide/grafana.json',
+        'destination': '../templates/grafana/dashboards',
+        'type': 'json',
+    },
+    {
+        'source': 'https://raw.githubusercontent.com/helm/charts/master/stable/prometheus-operator/dashboards/grafana-coredns-k8s.json',
+        'destination': '../templates/grafana/dashboards',
+        'type': 'json',
+    },
+]
+
+# Additional conditions map
+condition_map = {
+    'grafana-coredns-k8s': ' .Values.coreDns.enabled',
+    'etcd': ' .Values.kubeEtcd.enabled',
+}
+
+# standard header
+header = '''# Generated from '%(name)s' from %(url)s
+{{- if and .Values.grafana.enabled .Values.grafana.defaultDashboardsEnabled%(condition)s }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ printf "%%s-%%s" (include "prometheus-operator.fullname" $) "%(name)s" | trunc 63 | trimSuffix "-" }}
+  labels:
+    {{- if $.Values.grafana.sidecar.dashboards.label }}
+    {{ $.Values.grafana.sidecar.dashboards.label }}: "1"
+    {{- end }}
+    app: {{ template "prometheus-operator.name" $ }}-grafana
+{{ include "prometheus-operator.labels" $ | indent 4 }}
+data:
+'''
+
+
+def init_yaml_styles():
+    represent_literal_str = change_style('|', SafeRepresenter.represent_str)
+    yaml.add_representer(LiteralStr, represent_literal_str)
+
+
+def escape(s):
+    return s.replace("{{", "{{`{{").replace("}}", "}}`}}")
+
+
+def yaml_str_repr(struct, indent=2):
+    """represent yaml as a string"""
+    text = yaml.dump(
+        struct,
+        width=1000,  # to disable line wrapping
+        default_flow_style=False  # to disable multiple items on single line
+    )
+    text = escape(text)  # escape {{ and }} for helm
+    text = textwrap.indent(text, ' ' * indent)
+    return text
+
+
+def write_group_to_file(resource_name, content, url, destination):
+    # initialize header
+    lines = header % {
+        'name': resource_name,
+        'url': url,
+        'condition': condition_map.get(resource_name, ''),
+    }
+
+    filename_struct = {resource_name + '.json': (LiteralStr(content))}
+    # rules themselves
+    lines += yaml_str_repr(filename_struct)
+
+    # footer
+    lines += '{{- end }}'
+
+    filename = resource_name + '.yaml'
+    new_filename = "%s/%s" % (destination, filename)
+
+    # make sure directories to store the file exist
+    makedirs(destination, exist_ok=True)
+
+    # recreate the file
+    with open(new_filename, 'w') as f:
+        f.write(lines)
+
+    print("Generated %s" % new_filename)
+
+
+def main():
+    init_yaml_styles()
+    # read the rules, create a new template file per group
+    for chart in charts:
+        print("Generating rules from %s" % chart['source'])
+        raw_text = requests.get(chart['source']).text
+        if chart['type'] == 'yaml':
+            yaml_text = yaml.load(raw_text)
+            groups = yaml_text['items']
+            for group in groups:
+                for resource, content in group['data'].items():
+                    write_group_to_file(resource.replace('.json', ''), content, chart['source'], chart['destination'])
+        elif chart['type'] == 'json':
+            json_text = json.loads(raw_text)
+            # is it already a dashboard structure or is it nested (etcd case)?
+            flat_structure = bool(json_text.get('annotations'))
+            if flat_structure:
+                resource = path.basename(chart['source']).replace('.json', '')
+                write_group_to_file(resource, json.dumps(json_text, indent=4), chart['source'], chart['destination'])
+            else:
+                for resource, content in json_text.items():
+                    write_group_to_file(resource.replace('.json', ''), json.dumps(content, indent=4), chart['source'], chart['destination'])
+    print("Finished")
+
+
+if __name__ == '__main__':
+    main()