1 files changed, 250 insertions, 0 deletions
diff --git a/cmd/lspipeline/main.go b/cmd/lspipeline/main.go
new file mode 100644
index 0000000..0e1ebb0
--- /dev/null
+++ b/cmd/lspipeline/main.go
@@ -0,0 +1,250 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os/exec"
+	"strings"
+
+	"rescribe.xyz/bookpipeline"
+)
+
+const usage = `Usage: lspipeline [-i key] [-n num]
+
+Lists useful things related to the pipeline.
+
+- Instances running
+- Messages in each queue
+- Books not completed
+- Books done
+- Last n lines of bookpipeline logs from each running instance
+`
+
+type LsPipeliner interface {
+	Init() error
+	PreQueueId() string
+	WipeQueueId() string
+	OCRQueueId() string
+	AnalyseQueueId() string
+	GetQueueDetails(url string) (string, string, error)
+	GetInstanceDetails() ([]bookpipeline.InstanceDetails, error)
+	ListObjects(bucket string, prefix string) ([]string, error)
+	WIPStorageId() string
+}
+
+// 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
+}
+
+type queueDetails struct {
+	name, numAvailable, numInProgress string
+}
+
+func getInstances(conn LsPipeliner, detailsc chan bookpipeline.InstanceDetails) {
+	details, err := conn.GetInstanceDetails()
+	if err != nil {
+		log.Println("Error getting instance details:", err)
+	}
+	for _, d := range details {
+		detailsc <- d
+	}
+	close(detailsc)
+}
+
+func getQueueDetails(conn LsPipeliner, qdetails chan queueDetails) {
+	queues := []struct{ name, id string }{
+		{"preprocess", conn.PreQueueId()},
+		{"wipeonly", conn.WipeQueueId()},
+		{"ocr", conn.OCRQueueId()},
+		{"analyse", conn.AnalyseQueueId()},
+	}
+	for _, q := range queues {
+		avail, inprog, err := conn.GetQueueDetails(q.id)
+		if err != nil {
+			log.Println("Error getting queue details:", err)
+		}
+		var qd queueDetails
+		qd.name = q.name
+		qd.numAvailable = avail
+		qd.numInProgress = inprog
+		qdetails <- qd
+	}
+	close(qdetails)
+}
+
+// getBookStatus returns a list of in progress and done books.
+// It determines this by listing all objects, and splitting the
+// prefixes into two lists, those which have a 'graph.png' file,
+// which are classed as done, and those which are not.
+func getBookStatus(conn LsPipeliner) (inprogress []string, done []string, err error) {
+	allfiles, err := conn.ListObjects(conn.WIPStorageId(), "")
+	if err != nil {
+		log.Println("Error getting list of objects:", err)
+		return inprogress, done, err
+	}
+	for _, f := range allfiles {
+		parts := strings.Split(f, "/")
+		if parts[1] != "graph.png" {
+			continue
+		}
+		prefix := parts[0]
+		found := false
+		for _, i := range done {
+			if i == prefix {
+				found = true
+				continue
+			}
+		}
+		if !found {
+			done = append(done, prefix)
+		}
+	}
+
+	for _, f := range allfiles {
+		parts := strings.Split(f, "/")
+		prefix := parts[0]
+		found := false
+		for _, i := range done {
+			if i == prefix {
+				found = true
+				continue
+			}
+		}
+		for _, i := range inprogress {
+			if i == prefix {
+				found = true
+				continue
+			}
+		}
+		if !found {
+			inprogress = append(inprogress, prefix)
+		}
+	}
+
+	return inprogress, done, err
+}
+
+func getBookStatusChan(conn LsPipeliner, inprogressc chan string, donec chan string) {
+	inprogress, done, err := getBookStatus(conn)
+	if err != nil {
+		log.Println("Error getting book status:", err)
+		close(inprogressc)
+		close(donec)
+		return
+	}
+	for _, i := range inprogress {
+		inprogressc <- i
+	}
+	close(inprogressc)
+	for _, i := range done {
+		donec <- i
+	}
+	close(donec)
+}
+
+func getRecentSSHLogs(ip string, id string, n int) (string, error) {
+	addr := fmt.Sprintf("%s@%s", "admin", ip)
+	logcmd := fmt.Sprintf("journalctl -n %d -u bookpipeline", n)
+	var cmd *exec.Cmd
+	if id == "" {
+		cmd = exec.Command("ssh", "-o", "StrictHostKeyChecking no", addr, logcmd)
+	} else {
+		cmd = exec.Command("ssh", "-o", "StrictHostKeyChecking no", "-i", id, addr, logcmd)
+	}
+	out, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	return string(out), nil
+}
+
+func getRecentSSHLogsChan(ips []string, id string, lognum int, logs chan string) {
+	for _, ip := range ips {
+		sshlog, err := getRecentSSHLogs(ip, id, lognum)
+		if err != nil {
+			log.Printf("Error getting SSH logs for %s: %s\n", ip, err)
+			continue
+		}
+		logs <- fmt.Sprintf("%s\n%s", ip, sshlog)
+	}
+	close(logs)
+}
+
+func main() {
+	keyfile := flag.String("i", "", "private key file for SSH")
+	lognum := flag.Int("n", 5, "number of lines to include in SSH logs")
+	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 LsPipeliner
+	conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog}
+	err := conn.Init()
+	if err != nil {
+		log.Fatalln("Failed to set up cloud connection:", err)
+	}
+
+	instances := make(chan bookpipeline.InstanceDetails, 100)
+	queues := make(chan queueDetails)
+	inprogress := make(chan string, 100)
+	done := make(chan string, 100)
+	logs := make(chan string, 10)
+
+	go getInstances(conn, instances)
+	go getQueueDetails(conn, queues)
+	go getBookStatusChan(conn, inprogress, done)
+
+	var ips []string
+
+	fmt.Println("# Instances")
+	for i := range instances {
+		fmt.Printf("ID: %s, Type: %s, LaunchTime: %s, State: %s", i.Id, i.Type, i.LaunchTime, i.State)
+		if i.Name != "" {
+			fmt.Printf(", Name: %s", i.Name)
+		}
+		if i.Ip != "" {
+			fmt.Printf(", IP: %s", i.Ip)
+			if i.State == "running" && i.Name != "workhorse" {
+				ips = append(ips, i.Ip)
+			}
+		}
+		if i.Spot != "" {
+			fmt.Printf(", SpotRequest: %s", i.Spot)
+		}
+		fmt.Printf("\n")
+	}
+
+	go getRecentSSHLogsChan(ips, *keyfile, *lognum, logs)
+
+	fmt.Println("\n# Queues")
+	for i := range queues {
+		fmt.Printf("%s: %s available, %s in progress\n", i.name, i.numAvailable, i.numInProgress)
+	}
+
+	fmt.Println("\n# Books not completed")
+	for i := range inprogress {
+		fmt.Println(i)
+	}
+
+	fmt.Println("\n# Books done")
+	for i := range done {
+		fmt.Println(i)
+	}
+
+	if len(ips) > 0 {
+		fmt.Println("\n# Recent logs")
+		for i := range logs {
+			fmt.Printf("\n%s", i)
+		}
+	}
+}