X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/dc021c3b57dcdebe464c148d55f9990a74e8246b..19e7e99d21d9570f04ba38a5d4b823e4096d232c:/lib/cloud/interfaces.go

diff --git a/lib/cloud/interfaces.go b/lib/cloud/interfaces.go
index 2d53a49c51..27cf26152c 100644
--- a/lib/cloud/interfaces.go
+++ b/lib/cloud/interfaces.go
@@ -102,6 +102,12 @@ type Instance interface {
 	// Replace tags with the given tags
 	SetTags(InstanceTags) error
 
+	// Get recent price history, if available. The InstanceType is
+	// supplied as an argument so the driver implementation can
+	// account for AddedScratch cost without requesting the volume
+	// attachment information from the provider's API.
+	PriceHistory(arvados.InstanceType) []InstancePrice
+
 	// Shut down the node
 	Destroy() error
 }
@@ -141,6 +147,11 @@ type InstanceSet interface {
 	Stop()
 }
 
+type InstancePrice struct {
+	StartTime time.Time
+	Price     float64
+}
+
 type InitCommand string
 
 // A Driver returns an InstanceSet that uses the given InstanceSetID