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package main
import (
"errors"
"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
- 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)
`
type instanceDetails struct {
id, name, ip, spot, iType, state, launchTime string
}
type queueDetails struct {
name, numAvailable, numInProgress string
}
func ec2getInstances(svc *ec2.EC2, instances chan instanceDetails) {
err := svc.DescribeInstancesPages(&ec2.DescribeInstancesInput{}, parseInstances(instances))
if err != nil {
close(instances)
log.Println("Error with ec2 DescribeInstancePages call:", err)
}
}
func parseInstances(details chan instanceDetails) (func(*ec2.DescribeInstancesOutput, bool) bool) {
return func(page *ec2.DescribeInstancesOutput, lastPage bool) bool {
for _, r := range page.Reservations {
for _, i := range r.Instances {
var d instanceDetails
for _, t := range i.Tags {
if *t.Key == "Name" {
d.name = *t.Value
}
}
if i.PublicIpAddress != nil {
d.ip = *i.PublicIpAddress
}
if i.SpotInstanceRequestId != nil {
d.spot = *i.SpotInstanceRequestId
}
d.iType = *i.InstanceType
d.id = *i.InstanceId
d.launchTime = i.LaunchTime.String()
d.state = *i.State.Name
details <- d
}
}
if lastPage {
close(details)
}
return !lastPage
}
}
func ec2GetQueueDetails(svc *sqs.SQS, qdetails chan queueDetails, qnames []string) {
for _, q := range qnames {
avail, inprog, err := getQueueDetails(q, svc)
if err != nil {
log.Println("Error getting queue details:", err)
}
var qd queueDetails
qd.name = q
qd.numAvailable = avail
qd.numInProgress = inprog
qdetails <- qd
}
close(qdetails)
}
func getQueueDetails(qname string, svc *sqs.SQS) (string, string, error) {
result, err := svc.GetQueueUrl(&sqs.GetQueueUrlInput{
QueueName: aws.String(qname),
})
if err != nil {
return "", "", err
}
prequrl := *result.QueueUrl
numAvailable := "ApproximateNumberOfMessages"
numInProgress := "ApproximateNumberOfMessagesNotVisible"
attrs, err := svc.GetQueueAttributes(&sqs.GetQueueAttributesInput{
AttributeNames: []*string{&numAvailable, &numInProgress},
QueueUrl: &prequrl,
})
if err != nil {
return "", "", errors.New(fmt.Sprintf("Failed to get queue attributes: %s", err))
}
return *attrs.Attributes[numAvailable], *attrs.Attributes[numInProgress], nil
}
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)
instances := make(chan instanceDetails, 100)
queues := make(chan queueDetails)
go ec2getInstances(ec2svc, instances)
go ec2GetQueueDetails(sqssvc, queues, []string{"rescribepreprocess", "rescribeocr", "rescribeanalyse"})
fmt.Println("# Instances")
for i := range instances {
fmt.Printf("ID: %s, Type: %s, LaunchTime: %s, State: %s", i.id, i.iType, i.launchTime, i.state)
if i.name != "" {
fmt.Printf(", Name: %s", i.name)
}
if i.ip != "" {
fmt.Printf(", IP: %s", i.ip)
}
if i.spot != "" {
fmt.Printf(", SpotRequest: %s", i.spot)
}
fmt.Printf("\n")
}
fmt.Println("\n# Queues")
for i := range queues {
fmt.Printf("%s: %s available, %s in progress\n", i.name, i.numAvailable, i.numInProgress)
}
// TODO: See remaining items in the usage statement
}
|
