Add spotme command to start appropriate spot instances

2 files changed, 71 insertions, 0 deletions

diff --git a/aws.go b/aws.go
index 4aea082..73f3b2f 100644
--- a/aws.go
+++ b/aws.go
@@ -349,3 +349,21 @@ func (a *AwsConn) GetInstanceDetails() ([]InstanceDetails, error) {
 	})
 	return details, err
 }
+
+func (a *AwsConn) StartInstances(n int) error {
+	_, err := a.ec2svc.RequestSpotInstances(&ec2.RequestSpotInstancesInput{
+		InstanceCount: aws.Int64(int64(n)),
+		LaunchSpecification: &ec2.RequestSpotLaunchSpecification{
+			IamInstanceProfile: &ec2.IamInstanceProfileSpecification{
+				Arn: aws.String("arn:aws:iam::557852942063:instance-profile/pipeliner"),
+			},
+			ImageId: aws.String("ami-02cd15d68d4ca2865"),
+			InstanceType: aws.String("m5.large"),
+			SecurityGroupIds: []*string{
+				aws.String("sg-0be8a3ab89e7136b9"),
+			},
+		},
+		Type: aws.String("one-time"),
+	})
+	return err
+}
diff --git a/cmd/spotme/main.go b/cmd/spotme/main.go
new file mode 100644
index 0000000..99404cb
--- /dev/null
+++ b/cmd/spotme/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"rescribe.xyz/bookpipeline"
+)
+
+const usage = `Usage: spotme [-n num]
+
+Create new spot instances for the book pipeline.
+`
+
+type SpotPipeliner interface {
+	Init() error
+	StartInstances(n int) error
+}
+
+// NullWriter is used so non-verbose logging may be discarded
+type NullWriter bool
+
+func (w NullWriter) Write(p []byte) (n int, err error) {
+	return len(p), nil
+}
+
+func main() {
+	num := flag.Int("n", 1, "number of instances to start")
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), usage)
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	var verboselog *log.Logger
+	var n NullWriter
+	verboselog = log.New(n, "", 0)
+
+	var conn SpotPipeliner
+	conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog}
+	err := conn.Init()
+	if err != nil {
+		log.Fatalln("Failed to set up cloud connection:", err)
+	}
+
+	log.Println("Starting spot instances")
+	err = conn.StartInstances(*num)
+	if err != nil {
+		log.Fatalln("Failed to start a spot instance:", err)
+	}
+	log.Println("Spot instance request sent successfully")
+}