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|
package server
import (
"context"
"fmt"
"math/rand"
"os"
"strconv"
"strings"
"time"
"github.com/mimecast/dtail/internal/clients"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/logger"
"github.com/mimecast/dtail/internal/omode"
gossh "golang.org/x/crypto/ssh"
)
const authLength = 64
const authCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@$%^&*()_+[]"
type scheduler struct {
authPayload string
}
func newScheduler() *scheduler {
seededRand := rand.New(rand.NewSource(time.Now().UnixNano()))
b := make([]byte, authLength)
for i := range b {
b[i] = authCharset[seededRand.Intn(len(authCharset))]
}
return &scheduler{
authPayload: string(b),
}
}
func (s *scheduler) start(ctx context.Context) {
for {
select {
case <-time.After(time.Minute):
s.runJobs(ctx)
case <-ctx.Done():
return
}
}
}
func (s *scheduler) runJobs(ctx context.Context) {
for _, scheduled := range config.Server.Schedule {
if !scheduled.Enable {
logger.Debug(scheduled.Name, "Not running job as not enabled")
continue
}
hour, err := strconv.Atoi(time.Now().Format("15"))
if err != nil {
logger.Error(scheduled.Name, "Unable to create scheduled job", err)
continue
}
if hour < scheduled.TimeRange[0] || hour >= scheduled.TimeRange[1] {
logger.Debug(scheduled.Name, "Not running job out of time range")
continue
}
files := fillDates(scheduled.Files)
outfile := fillDates(scheduled.Outfile)
_, err = os.Stat(outfile)
if !os.IsNotExist(err) {
logger.Debug(scheduled.Name, "Not running job as outfile already exists", outfile)
continue
}
servers := scheduled.Servers
if servers == "" {
servers = config.Server.SSHBindAddress
}
args := clients.Args{
ConnectionsPerCPU: 10,
Discovery: scheduled.Discovery,
ServersStr: servers,
What: files,
Mode: omode.MapClient,
UserName: config.ScheduledUser,
}
args.SSHAuthMethods = append(args.SSHAuthMethods, gossh.Password(s.authPayload))
tmpOutfile := fmt.Sprintf("%s.tmp", outfile)
query := fmt.Sprintf("%s outfile %s", scheduled.Query, tmpOutfile)
client, err := clients.NewMaprClient(args, query)
if err != nil {
logger.Error(fmt.Sprintf("Unable to create scheduled job %s", scheduled.Name), err)
continue
}
logger.Info(fmt.Sprintf("Starting scheduled job %s", scheduled.Name))
status := client.Start(ctx)
logMessage := fmt.Sprintf("Job exited with status %d", status)
if err := os.Rename(tmpOutfile, outfile); err == nil {
logger.Info(scheduled.Name, fmt.Sprintf("Renamed %s to %s", tmpOutfile, outfile))
}
if status != 0 {
logger.Warn(logMessage)
continue
}
logger.Info(logMessage)
}
}
func fillDates(str string) string {
yyyesterday := time.Now().Add(3 * -24 * time.Hour).Format("20060102")
str = strings.ReplaceAll(str, "$yyyesterday", yyyesterday)
yyesterday := time.Now().Add(2 * -24 * time.Hour).Format("20060102")
str = strings.ReplaceAll(str, "$yyesterday", yyesterday)
yesterday := time.Now().Add(1 * -24 * time.Hour).Format("20060102")
str = strings.ReplaceAll(str, "$yesterday", yesterday)
today := time.Now().Format("20060102")
str = strings.ReplaceAll(str, "$today", today)
tomorrow := time.Now().Add(1 * 24 * time.Hour).Format("20060102")
return strings.ReplaceAll(str, "$tomorrow", tomorrow)
}
|
