grafana: provision timescale datasource

imageroot/actions/configure-module/20configure

@@ -159,6 +159,7 @@ with open('prometheus.yml', 'w', encoding='utf-8') as fp:
     fp.write(f'        - 127.0.0.1:{ports[5]}\n')
 
 # Grafana configuration
+db = agent.read_envfile('db.env')
 with open('grafana.yml', 'w') as fp:
     fp.write("apiVersion: 1\n")
     fp.write("datasources:\n")
@@ -174,6 +175,23 @@ with open('grafana.yml', 'w') as fp:
     fp.write('    access: proxy\n')
     fp.write(f'    url: http://127.0.0.1:{ports[5]}\n')
 
+    fp.write('  - name: Local Timescale\n')
+    fp.write('    type: postgres\n')
+    fp.write('    uid: timescale\n')
+    fp.write(f'    url: 127.0.0.1:{db.get("POSTGRES_PORT")}\n')
+    fp.write(f'    user: {db.get("POSTGRES_USER")}\n')
+    fp.write('    secureJsonData:\n')
+    fp.write(f'      password: {db.get("POSTGRES_PASSWORD")}\n')
+    fp.write('    jsonData:\n')
+    fp.write('      database: report\n')
+    fp.write('      sslmode: disable\n')
+    fp.write('      maxOpenConns: 100\n')
+    fp.write('      maxIdleConns: 100\n')
+    fp.write('      maxIdleConnsAuto: true\n')
+    fp.write('      connMaxLifetime: 14400\n')
+    fp.write('      postgresVersion: 1500\n')
+    fp.write('      timescaledb: true\n')
+
 network = agent.read_envfile('network.env')
 tun = network.get('OVPN_TUN')
 bits = sum(bin(int(x)).count('1') for x in request["ovpn_netmask"].split('.'))