Unable to configure watches

Elastic Stack Kibana
1

Hello team,
While configuring the watcher I am facing issues w.r.t email notifications.
Trying to send an alert about node's CPU utilization and other paramenters, I am not able to get or rather set subject to send hostname and other details.
I am talking wrt terms with ctx.xxx.yyyy
say ctx.hostname, ctx.ip address kind of stuff.

I would like to have an alert in this format:

The is an alert triggered wrt to environment node. Attend it on priority.
##########################################
Alert Type: {{ctx.metadata.name}}
Host: {{ctx.metadata.}}
HostIP: {{ctx.payload}}
Timestamp: {{ctx.execution_time}}
Possible solutions: httplinktotroubleshootdocument
##########################################

2

The email subject can contain Mustache templates just like the body of the email. So your email action might look like

"actions" : {
  "send_email" : { 
    "email" : { 
      "to" : "<username>@<domainname>", 
      "subject" : "High CPU Utiliziation on {{ctx.hostname}} at {{ctx.execution_time}}", 
      "body" : "..." 
    }
  }
}

If you are getting errors when setting up the action, please reply with the relevant errors.