*Objective:* To remove key/value pair from a go datastructure when a
condition is met.
*System Information:* Alertmanager's email template (HTML in go) code.
*Code:*
{{ if gt (len .Alerts.Firing) 0 }
{{ range .Alerts.Firing }}
{{ $labels := .Labels }}
{{ range $labels.SortedPairs }}
{{ if and (match .Name "alertname") (match .Value
"Consul-Agent-Unhealthy") }}
{{ $labels := $labels.Remove "status" }}
{{ end }}
{{ end }}
{{ end }}
{{ end }}
*Error:*
level=error ts=2020-06-19T16:48:26.364Z caller=notify.go:372
component=dispatcher msg="Error on notify" err="cancelling notify retry for
\"email\" due to unrecoverable error: execute html template: template:
email_template.tmpl:371:25: executing \"email_template.tmpl\" at
<.Labels.Remove>: can't evaluate field Labels in type template.Pair"
context_err=null
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