Alerts are not getting closed for alerts from Grafana8

[kiran3394]

Describe the Bug:
Alerts are not getting closed in goalert even after resolving in Grafana8.

Steps to Reproduce:

1. Create an alert rule in Grafana (8.1.2) and corresponding notification policy with contact point as goalert incoming webhook.
2. When alert rule goes to alerting state, we get alert in goalert.
3. When the alert get resolved in Grafana, alert is not getting closed in goalert.

Expected Behavior:
Alerts should be closed after it get resolved in Grafana (8.1.2)

Observed Behavior:
Alerts are not getting closed in goalert even after resolving in Grafana8.

Application Version:
Grafana - 8.1.2
Goalert- v0.29.0

[kiran3394]

We have done patching to fix it:
In grafana.go

// To handle closing of alerts coming from Grafana-8
		enable_grafana8 := os.Getenv("ENABLE_GRAFANA8")
		if strings.EqualFold(enable_grafana8, "true") {
			g.Message = strings.ReplaceAll(g.Message, "**Firing**", "")
			g.Message = strings.ReplaceAll(g.Message, "**Resolved**", "")
		}

[mastercactapus]

Just working on the review of a PR fixing this, it looks like Grafana's new payload includes a version number so once merged & released it should work automatically with no ENV var required. Thanks for the report!