Grafana: unable to create dashboards and datasources from other admin-tools

Problem

When deploying loki, the datasource is not created:

Get token
parse error: Invalid numeric literal at line 1, column 7
Get folder ID
jq: error (at <stdin>:1): null (null) cannot be matched, as it is not a string
Create datasource
{"extra":null,"message":"Unauthorized","messageId":"auth.unauthorized","statusCode":401,"traceID":""}
<html>
<head><title>400 Bad Request</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<hr><center>nginx</center>
</body>
</html>

The issue is because the base64 command wrap it's output lines:

  • short strings are not wrapped: pwgen -s1 42 | tr -d '\n' | base64 
    SDRrZEtVUzlDTnVPbkVVMEZRQlpHcldaNGtwd05OREYyOXkzc0tLWUZq
  • long strings are wrapped: pwgen -s1 128 | tr -d '\n' | base64 
    c3diMU43SWVndlA5Y3p4ZThYM0Q2NUM1Q3RYUTJtNkMyRzF1TllsZTNqMzdDdlBTaTZ4YmZqcGtP
NjBLSzB5ODVISEtBMmo2MXdFYk5ZaVFqR2xQY1hVbDVhNm0zNlpYQkxtbEJEVDRtNW5aZGVGZnJM
MnNHNzVoZUxmSU02eUw=

After working around this problem, I found that the datasource:

Promtail client URL could be calculated automatically, I think.

Proposal

  • Use the -w0 option to avoid wrapping base64: pwgen -s1 128 | tr -d '\n' | base64 -w0 
    Y01qQmxSNUwxRHlBUHV4RFhDblRDTlhMSUsxdDlGYllnZUZsZ1hTUWhvNXlDSUZST2s1eDhCM0FzR2ZiRTFKSE90MlVDZkdDZE95blhwZ2YzaFBHNVZWTEhsZ2plajRkMllDQXYzRFNCYzVvRERKZmF2TmRtUHpKUEpaNVlJOUM=
  • use the namespace defined by configuration to create datasource
  • make the name and type configurable
Modification effectuée par Daniel Dehennin