How do i include message fields in the Alert Action Message

Plugins Alerting
11

Have you added the needed fields to stored_fields in a query editor?

"docvalue_fields": [
        {
            "field": "@timestamp",
            "format": "date_time"
        },
                {
            "field": "container.name",
            "format": "string"
        },
        {
            "field": "host",
            "format": "string"
        },
        {
            "field": "m.alert.severity",
            "format": "string"
        },
        {
            "field": "m.alert.name",
            "format": "string"
        },
        {
            "field": "m.stackTrace",
            "format": "string"
        }

And then you should define those field in the Action:

 Monitor {{ctx.monitor.name}} just entered ALERT status. Please investigate the issue.
- Alert time: {{ctx.periodStart}}

{{#ctx.results.0.hits.hits}}
> {{_source.container.name}} - {{_source.host}} - {{_source.m.alert.severity}}
> {{_source.m.alert.name}}
> {{_source.m.stackTrace}}
{{/ctx.results.0.hits.hits}}