package main import ( "flag" "fmt" "log" "os/exec" "strings" "rescribe.xyz/go.git/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 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()}, {"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", addr, logcmd) } else { cmd = exec.Command("ssh", "-i", id, addr, logcmd) } out, err := cmd.Output() if err != nil { return "", err } return string(out), nil } 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) 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) ips = append(ips, 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) } 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 _, ip := range ips { logs, err := getRecentSSHLogs(ip, *keyfile, *lognum) if err != nil { log.Printf("Error running ssh for %s: %v\n", ip, err) continue } fmt.Printf("\n%s\n%s\n", ip, logs) } } }