From 3bfe3a9e11f0cbe2ccde2a2fbd007b50b5fdfc07 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Wed, 18 Sep 2019 17:56:39 +0100
Subject: Add start of lspipeline

---
 bookpipeline/cmd/lspipeline/main.go | 83 +++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 bookpipeline/cmd/lspipeline/main.go

(limited to 'bookpipeline/cmd/lspipeline')

diff --git a/bookpipeline/cmd/lspipeline/main.go b/bookpipeline/cmd/lspipeline/main.go
new file mode 100644
index 0000000..5943e6c
--- /dev/null
+++ b/bookpipeline/cmd/lspipeline/main.go
@@ -0,0 +1,83 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	// TODO: abstract out the aws stuff into aws.go in due course
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	//"github.com/aws/aws-sdk-go/service/s3"
+	//"github.com/aws/aws-sdk-go/service/sqs"
+)
+
+const usage = `Usage: lspipeline
+
+Lists useful things related to the pipeline.
+
+- Instances running
+- Messages in each queue (ApproximateNumberOfMessages and ApproximateNumberOfMessagesNotVisible from GetQueueAttributes)
+- Books not completed (from S3 without a best file)
+- Books completed (from S3 with a best file)
+- Last 5 lines of bookpipeline logs from each running instance (with -v)
+`
+
+func printInstances(page *ec2.DescribeInstancesOutput, lastPage bool) bool {
+	for _, r := range page.Reservations {
+		for _, i := range r.Instances {
+			var ip, name, spot string
+			for _, t := range i.Tags {
+				if *t.Key == "Name" {
+					name = *t.Value
+				}
+			}
+			if i.PublicIpAddress != nil {
+				ip = *i.PublicIpAddress
+			}
+			if i.SpotInstanceRequestId != nil {
+				spot = *i.SpotInstanceRequestId
+			}
+			fmt.Printf("Type: %s", *i.InstanceType)
+			if name != "" {
+				fmt.Printf(", Name: %s", name)
+			}
+			fmt.Printf(", LaunchTime: %s, State: %s", i.LaunchTime, *i.State.Name)
+			if ip != "" {
+				fmt.Printf(", IP: %s", ip)
+			}
+			if spot != "" {
+				fmt.Printf(", SpotRequest: %s", spot)
+			}
+			fmt.Printf("\n")
+		}
+	}
+
+	return !lastPage
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), usage)
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	sess, err := session.NewSession(&aws.Config{
+		Region: aws.String("eu-west-2"),
+	})
+	if err != nil {
+		log.Fatalln("Failed to set up aws session", err)
+	}
+	ec2svc := ec2.New(sess)
+	//s3svc := s3.New(sess)
+	//sqssvc := sqs.New(sess)
+
+	err = ec2svc.DescribeInstancesPages(&ec2.DescribeInstancesInput{}, printInstances)
+	if err != nil {
+		log.Fatalln("Failed to get ec2 instances", err)
+	}
+
+	// TODO: See remaining items in the usage statement
+}
-- 
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