Getting 403 Origin Not Allowed when logging in behind Azure Application Gateway while adding dashboard sources

Grafana Configuration
1

  • What Grafana version and what operating system are you using?
    10.2.2

  • What are you trying to achieve?
    I’m trying to expose grafana dashboard with a custom domain…

  • How are you trying to achieve it?
    I’m keeping grafana dashboard behind azure app gateway

  • What happened?
    Whenever I try to add any sources or interact with anything in grafana after login its throwing 403 origin not allowed

  • What did you expect to happen?
    It should allow me to create dashboards or add data sources

  • Can you copy/paste the configuration(s) that you are having problems with?
    grafana.ini: >
    [analytics]

    check_for_updates = true

    [grafana_net]

    url = grafana.net

    [log]

    mode = console

    [paths]

    data = /var/lib/grafana/

    logs = /var/log/grafana

    plugins = /var/lib/grafana/plugins

    provisioning = /etc/grafana/provisioning

    [server]

    domain = ‘test’

    root_url= ‘test/grafana’

    serve_from_sub_path = true

    [auth.generic_oauth]

    enabled = true

    name = OAuth

    allow_sign_up = true

    client_id = grafanatests

    scopes = openid profile email grafanatests

    auth_url =
    https://test-idp/connect/authorize

    token_url =test-idp/connect/token(Its base url is proper as auth url.just removed as discussion not allowing to add more than 2 links)

    api_url = test-idp/connect/userinfo(Its base url is proper as auth url.just removed as discussion not allowing to add more than 2 links)

  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
    Origin not allowed 403

2

Your API gateway must forward proper host header, which you configured in server domain section. So check documentation of your gateway how to do that.