LocalAI/pkg/model/process.go

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package model
import (
"fmt"
"os"
"os/signal"
"strconv"
"strings"
"syscall"
"time"
"github.com/hpcloud/tail"
process "github.com/mudler/go-processmanager"
"github.com/rs/zerolog/log"
)
func (ml *ModelLoader) StopAllExcept(s string) {
ml.StopGRPC(func(id string, p *process.Process) bool {
if id != s {
for ml.models[id].IsBusy() {
log.Debug().Msgf("%s busy. Waiting.", id)
time.Sleep(2 * time.Second)
}
log.Debug().Msgf("[single-backend] Stopping %s", id)
return true
}
return false
})
}
func (ml *ModelLoader) deleteProcess(s string) error {
if err := ml.grpcProcesses[s].Stop(); err != nil {
return err
}
delete(ml.grpcProcesses, s)
delete(ml.models, s)
return nil
}
type GRPCProcessFilter = func(id string, p *process.Process) bool
func includeAllProcesses(_ string, _ *process.Process) bool {
return true
}
func (ml *ModelLoader) StopGRPC(filter GRPCProcessFilter) {
for k, p := range ml.grpcProcesses {
if filter(k, p) {
ml.deleteProcess(k)
}
}
}
func (ml *ModelLoader) StopAllGRPC() {
ml.StopGRPC(includeAllProcesses)
}
func (ml *ModelLoader) GetGRPCPID(id string) (int, error) {
p, exists := ml.grpcProcesses[id]
if !exists {
return -1, fmt.Errorf("no grpc backend found for %s", id)
}
return strconv.Atoi(p.PID)
}
func (ml *ModelLoader) startProcess(grpcProcess, id string, serverAddress string) error {
// Make sure the process is executable
if err := os.Chmod(grpcProcess, 0755); err != nil {
return err
}
log.Debug().Msgf("Loading GRPC Process: %s", grpcProcess)
log.Debug().Msgf("GRPC Service for %s will be running at: '%s'", id, serverAddress)
grpcControlProcess := process.New(
process.WithTemporaryStateDir(),
process.WithName(grpcProcess),
process.WithArgs("--addr", serverAddress),
process.WithEnvironment(os.Environ()...),
)
ml.grpcProcesses[id] = grpcControlProcess
if err := grpcControlProcess.Run(); err != nil {
return err
}
log.Debug().Msgf("GRPC Service state dir: %s", grpcControlProcess.StateDir())
// clean up process
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
<-c
grpcControlProcess.Stop()
}()
go func() {
t, err := tail.TailFile(grpcControlProcess.StderrPath(), tail.Config{Follow: true})
if err != nil {
log.Debug().Msgf("Could not tail stderr")
}
for line := range t.Lines {
log.Debug().Msgf("GRPC(%s): stderr %s", strings.Join([]string{id, serverAddress}, "-"), line.Text)
}
}()
go func() {
t, err := tail.TailFile(grpcControlProcess.StdoutPath(), tail.Config{Follow: true})
if err != nil {
log.Debug().Msgf("Could not tail stdout")
}
for line := range t.Lines {
log.Debug().Msgf("GRPC(%s): stdout %s", strings.Join([]string{id, serverAddress}, "-"), line.Text)
}
}()
return nil
}