more on scheduled jobs and ssh callbacks

1 files changed, 78 insertions, 0 deletions

diff --git a/internal/server/scheduler.go b/internal/server/scheduler.go
new file mode 100644
index 0000000..3cf55ce
--- /dev/null
+++ b/internal/server/scheduler.go
@@ -0,0 +1,78 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+	"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.Second * 10):
+			s.runJobs(ctx)
+			return
+		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 {
+		args := clients.Args{
+			ConnectionsPerCPU: scheduled.ConnectionsPerCPU,
+			Discovery:         scheduled.Discovery,
+			ServersStr:        scheduled.Servers,
+			What:              scheduled.Files,
+			Mode:              omode.MapClient,
+			UserName:          config.ScheduledUser,
+		}
+		args.SSHAuthMethods = append(args.SSHAuthMethods, gossh.Password(s.authPayload))
+
+		client, err := clients.NewMaprClient(args, scheduled.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("Scheduled job %s exited with status %d", scheduled.Name, status)
+		if status != 0 {
+			logger.Warn(logMessage)
+			continue
+		}
+		logger.Info(logMessage)
+	}
+}