/
main.go
226 lines (215 loc) · 5.43 KB
/
main.go
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package main
import (
"bufio"
"bytes"
"context"
"flag"
"fmt"
"os"
"os/user"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/kaginawa/kaginawa-sdk-go"
)
var (
ver = "v0.0.0"
configFile = flag.String("c", defaultConfigFileName, "path to configuration file")
apiKey = flag.String("k", "", "admin API key for the Kaginawa Server")
server = flag.String("s", "", "hostname of the Kaginawa Server")
procFile = flag.String("f", "", "path to procedure (line-separated list of commands) file")
freshness = flag.Int("m", 15, "report freshness threshold by minutes")
listener = flag.Bool("l", false, "listen local port for TCP transfer")
v = flag.Bool("v", false, "print version")
procedure []string
)
func main() {
flag.Parse()
if *v {
fmt.Printf("kssh %s, compiled by %s\n", ver, runtime.Version())
os.Exit(0)
}
if flag.NArg() == 0 {
flag.Usage()
os.Exit(2)
}
target := flag.Arg(0)
if *configFile == defaultConfigFileName {
if defaultDir, err := os.UserConfigDir(); err == nil {
*configFile = filepath.Join(defaultDir, *configFile)
}
}
if flag.NArg() > 1 {
procedure = append(procedure, strings.Join(flag.Args()[1:], " "))
}
var config config
// Order of parameter sources
// 1. Flags (-k and -s)
// 2. Configuration file (-c or default)
// 3. Interactive prompt (save after collection)
if len(*apiKey) > 0 && len(*server) > 0 {
config.apiKey = *apiKey
config.server = *server
} else if _, err := os.Stat(*configFile); err == nil {
c, err := loadConfig(*configFile)
if err != nil {
fatalf("%v", err)
}
config = c
} else {
config = configPrompt(*configFile)
}
var username, defaultPassword string
if strings.Count(target, "@") == 1 {
split := strings.Split(target, "@")
username = split[0]
target = split[1]
} else if len(config.defaultUser) > 0 {
username = config.defaultUser
defaultPassword = config.defaultPassword
} else {
u, err := user.Current()
if err != nil {
panic(err)
}
username = u.Name
}
if len(*procFile) > 0 {
content, err := os.ReadFile(*procFile)
if err != nil {
fatalf("failed to load %s: %v", *procFile, err.Error())
}
s := bufio.NewScanner(bytes.NewReader(content))
for s.Scan() {
t := s.Text()
if len(t) > 0 {
procedure = append(procedure, t)
}
}
if len(procedure) == 0 {
fatalf("procedure is empty: %s", *procFile)
}
}
start(config, target, username, defaultPassword)
}
func configPrompt(path string) config {
fmt.Printf("Creating configuration file: %s\n", *configFile)
var c config
for {
fmt.Print("Kaginawa Server (ex. xxx.yyy.com): ")
if _, err := fmt.Scan(&c.server); err != nil {
continue
}
c.server = strings.TrimSpace(c.server)
if len(c.server) == 0 {
continue
}
break
}
for {
fmt.Print("Admin API key: ")
if _, err := fmt.Scan(&c.apiKey); err != nil {
continue
}
c.apiKey = strings.TrimSpace(c.apiKey)
if len(c.apiKey) == 0 {
continue
}
break
}
if err := c.save(path); err != nil {
fatalf("failed to create %s: %v", path, err)
}
return c
}
func selectTarget(reports []kaginawa.Report) kaginawa.Report {
if len(reports) == 1 {
return reports[0]
}
fmt.Printf("Multiple choices:\n")
for i, r := range reports {
if len(r.LocalIPv4) == 0 && len(r.LocalIPv6) > 0 {
fmt.Printf("%d: %s %s@%s %s\n", i+1, r.ID, r.LocalIPv6, r.Adapter, r.Hostname)
} else {
fmt.Printf("%d: %s %s@%s %s\n", i+1, r.ID, r.LocalIPv4, r.Adapter, r.Hostname)
}
}
var n int
for {
fmt.Print("number > ")
if _, err := fmt.Scan(&n); err != nil {
continue
}
n = n - 1
if n < 0 || n >= len(reports) {
fmt.Println("out of range")
continue
}
return reports[n]
}
}
func start(config config, target string, username, defaultPassword string) {
endpoint := config.server
if !strings.HasPrefix(endpoint, "http://") && !strings.HasPrefix(endpoint, "https://") {
endpoint = "https://" + endpoint
}
var report kaginawa.Report
client, err := kaginawa.NewClient(endpoint, config.apiKey)
if err != nil {
fatalf("failed to prepare API client: %v", err)
}
if strings.Count(target, ":") == 5 {
r, err := client.FindNode(context.Background(), target)
if err != nil {
fatalf("%v", err)
}
if r == nil {
fatalf("target not found: %s", target)
}
report = *r
} else {
reports, err := client.ListNodesByCustomID(context.Background(), target)
if err != nil {
fatalf("%v", err)
}
if len(reports) == 0 {
fatalf("target not found: %s", target)
}
var aliveReports []kaginawa.Report
for i, r := range reports {
if time.Now().Sub(time.Unix(r.ServerTime, 0)) < time.Duration(*freshness)*time.Minute {
aliveReports = append(aliveReports, reports[i])
}
}
if len(aliveReports) == 0 {
fatalf("target timestamp is out of date")
}
report = selectTarget(aliveReports)
}
if report.SSHRemotePort == 0 {
fatalf("ssh not connected.")
}
tunnel, err := client.FindSSHServerByHostname(context.Background(), report.SSHServerHost)
if err != nil {
fatalf("failed to get ssh server information: %v", err)
}
if tunnel == nil {
fatalf("unknown ssh server: %s", report.SSHServerHost)
}
if *listener {
listen(tunnel, report.SSHRemotePort)
return
}
s := connect(tunnel, username, defaultPassword, report.SSHRemotePort)
defer safeClose(s, "session")
if len(procedure) > 0 {
out, err := execCommand(s, strings.Join(procedure, " && "))
if err != nil {
fatalf("failed to execute command: %v", err)
}
fmt.Println(out)
return
}
openTerminal(s)
}