We would like to add a link to a pre-filled silence modal (including all Prometheus labels) to our Alertmanager templates, so that our users can create silences for individual alerts very easily.
Direct links to a pre-filled create silence modal were implemented by #1906.
However, from looking at #1906, it seems that Karma expects the
m parameter (containing the field values for the modal) to be base64-encoded. It seems that Alertmanager has no built-in support for base64: https://prometheus.io/docs/alerting/latest/notifications/.
Could we make the base64 optional, and also accept a regular url-encoded string for the
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