[SOLR-10358] Implement suspend-trigger and resume-trigger APIs

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.1, 8.0
• Component/s: SolrCloud
• Labels: autoscaling
• Assignee: Shalin Shekhar Mangar
• Reporter: Shalin Shekhar Mangar
• Created: 24/Mar/17 08:55
• Updated: 17/Oct/17 11:03
• Resolved: 27/Mar/17 13:50

Description

There are times when the user wants to pause execution of the autoscaling policies because he/she is performing some maintenance tasks. A cluster wide command can be used to suspend the triggers indefinitely or for a specific amount of time.

Examples:

Suspend the 'node_lost_trigger' until an explicit resume_trigger API is called:

curl -H 'Content-type:application/json' -d '{
	"suspend-trigger" : {
		"name" : "node_lost_trigger"
	}
}' http://localhost:8983/solr/admin/autoscaling

Suspend all triggers until resumed by an explicit resume_trigger API call:

curl -H 'Content-type:application/json' -d '{
	"suspend-trigger" : {
		"name" : "#EACH"
	}
}' http://localhost:8983/solr/admin/autoscaling

Suspend all triggers for 1 hour:

curl -H 'Content-type:application/json' -d '{
	"suspend-trigger" : {
		"name" : "#EACH"
		"timeout" : "1h"
	}
}' http://localhost:8983/solr/admin/autoscaling