Set the datasource on grafana dashboards

setDatasource.py

#!/usr/bin/env python

import sqlite3
import json

"""
Quick quick script to set the datasource for grafana dashboards
"""

OLD_DATASOURCE = 'null'
NEW_DATASOURCE = 'graphite'
SQLITE_DB = '/opt/grafana/data/grafana.db'
conn = None

try:
    conn = sqlite3.connect(SQLITE_DB)
    cur = conn.cursor()

    cur.execute('SELECT id, data FROM dashboard;')

    data = cur.fetchall()
except:
    raise

for dash_id, dash_data in data:
    dash = json.loads(dash_data)

    for row in dash['rows']:
        for panel in row['panels']:
            try:
                datasource = panel['datasource']
            except KeyError:
                print("Skipping dashboard: {}, row: {}, panel: {}".format(
                    dash['title'], row['title'], panel['title']))
            if not datasource or datasource == OLD_DATASOURCE:
                print("Updating dashboard: {}, row: {}, panel: {}".format(
                    dash['title'], row['title'], panel['title']))
                panel['datasource'] = NEW_DATASOURCE

                cur.execute("UPDATE dashboard SET data=? WHERE id=?", (json.dumps(dash), dash_id))

Ah, funny that you guys found this and sorry that it doesn't work! I haven't used it since it was written, and can't actually remember writing it to be honest. It wouldn't surpise me if the data structure has changed, so it probably needs updating.

Hello folks!
I found an easy way to change data source for all dashboards. The method below tested only on sqlite database and grafana version 7.0.1.
Make a backup of grafanadb
cp grafana.db grafana.db.backup
connect to current database
sqlite3 grafana.db
execute sql query
update dashboard set data = replace(data,'"Graphite"','null');
where Graphite is the name of datasource which you want to replace and null means default datasource in grafana.