tool fails when grafana-config `hide_version` is set

[chriz-active]

Problem

Running grafana-backup save with the grafana-config-setting hide_version fails:

   sys.exit(main())                                                                                                                                        
            ^^^^^^
 File "/usr/local/lib/python3.11/site-packages/grafana_backup/cli.py", line 52, in main
   save(args, settings)
 File "/usr/local/lib/python3.11/site-packages/grafana_backup/save.py", line 61, in main
   backup_functions[backup_function](args, settings)
 File "/usr/local/lib/python3.11/site-packages/grafana_backup/save_alert_rules.py", line 19, in main
   grafana_version = get_grafana_version(grafana_url, verify_ssl)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/usr/local/lib/python3.11/site-packages/grafana_backup/dashboardApi.py", line 440, in get_grafana_version
   return version.parse(r.json()['version'])
                        ~~~~~~~~^^^^^^^^^^^
KeyError: 'version'

Error is thrown here:

grafana-backup-tool/grafana_backup/dashboardApi.py

Lines 437 to 442 in 3dd9d71

	def get_grafana_version(grafana_url, verify_ssl):
	r = requests.get('{0}/api/health'.format(grafana_url), verify=verify_ssl)
	if r.status_code == 200:
	return version.parse(r.json()['version'])
	else:
	raise Exception("Unable to get version, returned response: {0}".format(r.status_code))

calling api/health in our instance v9.5.2 as admin returns

api/health
{          
  "database": "ok"
}

That is, the version-field is not available.

• The config we use is https://grafana.com/docs/grafana/v9.5/setup-grafana/configure-security/configure-security-hardening/#hide-the-version-number
• Although it states that hiding is only done for "unauthenticated users" that seems not the case? At least, I did a curl providing admin credentials...
  https://github.com/grafana/grafana/blob/cfcea7591663053d58f0783e84a356eb258444cb/pkg/api/http_server.go#L687
  https://github.com/grafana/grafana/blob/284c43c23d90d8688d21971f8bed55a09151bb3e/pkg/api/frontendsettings.go#L79
  https://github.com/grafana/grafana/blob/284c43c23d90d8688d21971f8bed55a09151bb3e/pkg/services/navtree/navtreeimpl/navtree.go#L208

Possible Solution

• The version is currently needed for the alert-rules:
  

  grafana-backup-tool/grafana_backup/create_alert_rule.py

  Lines 17 to 21 in 3dd9d71

  	grafana_version = get_grafana_version(grafana_url, verify_ssl)
  	minimum_version = version.parse('9.4.0')
  	if minimum_version <= grafana_version:
  	alert_rule = json.loads(data)

  
  

  grafana-backup-tool/grafana_backup/save_alert_rules.py

  Lines 19 to 22 in 3dd9d71

  	grafana_version = get_grafana_version(grafana_url, verify_ssl)
  	minimum_version = version.parse('9.4.0')
  	if minimum_version <= grafana_version:

• Might it be an option to provide the version as fallback as config/environment-variable?