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package server
import (
"context"
"fmt"
"strings"
"time"
"github.com/mimecast/dtail/internal/clients"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/omode"
gossh "golang.org/x/crypto/ssh"
)
type continuous struct {
cfg config.RuntimeConfig
}
func newContinuous(cfg config.RuntimeConfig) *continuous {
return &continuous{cfg: cfg}
}
func (c *continuous) start(ctx context.Context) {
dlog.Server.Info("Starting continuous job runner after 2s")
time.Sleep(time.Second * 2)
c.runJobs(ctx)
}
func (c *continuous) runJobs(ctx context.Context) {
for _, job := range c.cfg.Server.Continuous {
if !job.Enable {
dlog.Server.Debug(job.Name, "Not running job as not enabled")
continue
}
go func(job config.Continuous) {
c.runJob(ctx, job)
for {
select {
// Retry after a minute
case <-time.After(time.Minute):
c.runJob(ctx, job)
case <-ctx.Done():
return
}
}
}(job)
}
}
func (c *continuous) runJob(ctx context.Context, job config.Continuous) {
dlog.Server.Debug(job.Name, "Processing job")
files := fillDates(job.Files)
outfile := fillDates(job.Outfile)
servers := strings.Join(job.Servers, ",")
if servers == "" {
servers = c.cfg.Server.SSHBindAddress
}
args := config.Args{
ConnectionsPerCPU: config.DefaultConnectionsPerCPU,
Discovery: job.Discovery,
ServersStr: servers,
What: files,
Mode: omode.TailClient,
UserName: config.ContinuousUser,
}
args.SSHAuthMethods = append(args.SSHAuthMethods, gossh.Password(job.Name))
args.QueryStr = fmt.Sprintf("%s outfile %s", job.Query, outfile)
client, err := clients.NewMaprClient(args, clients.NonCumulativeMode)
if err != nil {
dlog.Server.Error(fmt.Sprintf("Unable to create job %s", job.Name), err)
return
}
jobCtx, cancel := context.WithCancel(ctx)
defer cancel()
if job.RestartOnDayChange {
go func() {
if c.waitForDayChange(ctx) {
dlog.Server.Info(fmt.Sprintf("Canceling job %s due to day change", job.Name))
cancel()
}
}()
}
dlog.Server.Info(fmt.Sprintf("Starting job %s", job.Name))
status := client.Start(jobCtx, make(chan string))
logMessage := fmt.Sprintf("Job exited with status %d", status)
if status != 0 {
dlog.Server.Warn(logMessage)
return
}
dlog.Server.Info(logMessage)
}
func (c *continuous) waitForDayChange(ctx context.Context) bool {
startTime := time.Now()
for {
select {
case <-time.After(time.Second):
if time.Now().Day() != startTime.Day() {
return true
}
case <-ctx.Done():
return false
}
}
}
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