Add spotme command to start appropriate spot instances

1 files changed, 53 insertions, 0 deletions

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")
+}