Loki is running, but I can't create a new data source!

Grafana Loki
1

Hello,
I am using Loki version 3.4.2 and I want to create a new Data sources, but I get the error Unable to connect with Loki. Please check the server logs for more details.

Loki configuration is as follows:

server:
  http_listen_port: 3100
  grpc_listen_port: 9096
  log_level: debug
  grpc_server_max_concurrent_streams: 1000

common:
  instance_addr: 172.20.1.29
  path_prefix: /var/lib/loki
  storage:
    filesystem:
      chunks_directory: /var/lib/loki/chunks
      rules_directory: /var/lib/loki/rules
  replication_factor: 1
  ring:
    kvstore:
      store: inmemory

query_range:
  results_cache:
    cache:
      embedded_cache:
        enabled: true
        max_size_mb: 100

limits_config:
  metric_aggregation_enabled: true

schema_config:
  configs:
    - from: 2020-10-24
      store: tsdb
      object_store: filesystem
      schema: v13
      index:
        prefix: index_
        period: 24h

ruler:
  alertmanager_url: http://localhost:9093

frontend:
  encoding: protobuf

And Loki is running properly on the server:

# ss -tupln
Netid           State            Recv-Q           Send-Q                     Local Address:Port                      Peer Address:Port           Process                                                                                                                                          
tcp             LISTEN           0                4096                                   *:3000                                 *:*               users:(("grafana",pid=319190,fd=10))                                                                                                            
tcp             LISTEN           0                4096                                   *:3100                                 *:*               users:(("loki",pid=319171,fd=7))

And:

# curl http://localhost:3100/ring
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Ring Status</title>
</head>
<body>
<h1>Ring Status</h1>
<p>Current time: 2025-03-08 02:02:26.632523562 -0800 PST m=&#43;339.574164195</p>
<form action="" method="POST">
    <input type="hidden" name="csrf_token" value="$__CSRF_TOKEN_PLACEHOLDER__">
    <table width="100%" border="1">
        <thead>
        <tr>
            <th>Instance ID</th>
            <th>Availability Zone</th>
            <th>State</th>
            <th>Address</th>
            <th>Registered At</th>
            <th>Read-Only</th>
            <th>Read-Only Updated</th>
            <th>Last Heartbeat</th>
            <th>Tokens</th>
            <th>Ownership</th>
            <th>Actions</th>
        </tr>
        </thead>
        <tbody>
        
            
                <tr>
            
            <td>Grafana</td>
            <td></td>
            <td>ACTIVE</td>
            <td>172.20.1.29:9096</td>
            <td>2025-03-08T09:56:47Z</td>
            
            <td></td>
            <td></td>
            
            <td>9s ago (10:02:17)</td>
            <td>128</td>
            <td>100%</td>
            <td>
                <button name="forget" value="Grafana" type="submit">Forget</button>
            </td>
            </tr>
        
        </tbody>
    </table>
    <br>
    
        <input type="button" value="Show Tokens" onclick="window.location.href = '?tokens=true'"/>
    

    
</form>
</body>
</html>

How do I fix this problem?

Thank you.

2

Hi,
The issue was fixed by adding the X-Scope-OrgID header:

Header: X-Scope-OrgID
Value: fake

Thank you.