LocalAI/api/localai/backend_monitor.go

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package localai
import (
"context"
"fmt"
"strings"
config "github.com/go-skynet/LocalAI/api/config"
"github.com/go-skynet/LocalAI/pkg/grpc/proto"
"github.com/go-skynet/LocalAI/api/options"
"github.com/gofiber/fiber/v2"
"github.com/rs/zerolog/log"
gopsutil "github.com/shirou/gopsutil/v3/process"
)
type BackendMonitorRequest struct {
Model string `json:"model" yaml:"model"`
}
type BackendMonitorResponse struct {
MemoryInfo *gopsutil.MemoryInfoStat
MemoryPercent float32
CPUPercent float64
}
type BackendMonitor struct {
configLoader *config.ConfigLoader
options *options.Option // Taking options in case we need to inspect ExternalGRPCBackends, though that's out of scope for now, hence the name.
}
func NewBackendMonitor(configLoader *config.ConfigLoader, options *options.Option) BackendMonitor {
return BackendMonitor{
configLoader: configLoader,
options: options,
}
}
func (bm *BackendMonitor) SampleLocalBackendProcess(model string) (*BackendMonitorResponse, error) {
config, exists := bm.configLoader.GetConfig(model)
var backend string
if exists {
backend = config.Model
} else {
// Last ditch effort: use it raw, see if a backend happens to match.
backend = model
}
if !strings.HasSuffix(backend, ".bin") {
backend = fmt.Sprintf("%s.bin", backend)
}
pid, err := bm.options.Loader.GetGRPCPID(backend)
if err != nil {
log.Error().Msgf("model %s : failed to find pid %+v", model, err)
return nil, err
}
// Name is slightly frightening but this does _not_ create a new process, rather it looks up an existing process by PID.
backendProcess, err := gopsutil.NewProcess(int32(pid))
if err != nil {
log.Error().Msgf("model %s [PID %d] : error getting process info %+v", model, pid, err)
return nil, err
}
memInfo, err := backendProcess.MemoryInfo()
if err != nil {
log.Error().Msgf("model %s [PID %d] : error getting memory info %+v", model, pid, err)
return nil, err
}
memPercent, err := backendProcess.MemoryPercent()
if err != nil {
log.Error().Msgf("model %s [PID %d] : error getting memory percent %+v", model, pid, err)
return nil, err
}
cpuPercent, err := backendProcess.CPUPercent()
if err != nil {
log.Error().Msgf("model %s [PID %d] : error getting cpu percent %+v", model, pid, err)
return nil, err
}
return &BackendMonitorResponse{
MemoryInfo: memInfo,
MemoryPercent: memPercent,
CPUPercent: cpuPercent,
}, nil
}
func (bm BackendMonitor) getModelLoaderIDFromCtx(c *fiber.Ctx) (string, error) {
input := new(BackendMonitorRequest)
// Get input data from the request body
if err := c.BodyParser(input); err != nil {
return "", err
}
config, exists := bm.configLoader.GetConfig(input.Model)
var backendId string
if exists {
backendId = config.Model
} else {
// Last ditch effort: use it raw, see if a backend happens to match.
backendId = input.Model
}
if !strings.HasSuffix(backendId, ".bin") {
backendId = fmt.Sprintf("%s.bin", backendId)
}
return backendId, nil
}
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func BackendMonitorEndpoint(bm BackendMonitor) func(c *fiber.Ctx) error {
return func(c *fiber.Ctx) error {
backendId, err := bm.getModelLoaderIDFromCtx(c)
if err != nil {
return err
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}
model := bm.options.Loader.CheckIsLoaded(backendId)
if model == "" {
return fmt.Errorf("backend %s is not currently loaded", backendId)
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}
status, rpcErr := model.GRPC(false, nil).Status(context.TODO())
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if rpcErr != nil {
log.Warn().Msgf("backend %s experienced an error retrieving status info: %s", backendId, rpcErr.Error())
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val, slbErr := bm.SampleLocalBackendProcess(backendId)
if slbErr != nil {
return fmt.Errorf("backend %s experienced an error retrieving status info via rpc: %s, then failed local node process sample: %s", backendId, rpcErr.Error(), slbErr.Error())
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}
return c.JSON(proto.StatusResponse{
State: proto.StatusResponse_ERROR,
Memory: &proto.MemoryUsageData{
Total: val.MemoryInfo.VMS,
Breakdown: map[string]uint64{
"gopsutil-RSS": val.MemoryInfo.RSS,
},
},
})
}
return c.JSON(status)
}
}
func BackendShutdownEndpoint(bm BackendMonitor) func(c *fiber.Ctx) error {
return func(c *fiber.Ctx) error {
backendId, err := bm.getModelLoaderIDFromCtx(c)
if err != nil {
return err
}
return bm.options.Loader.ShutdownModel(backendId)
}
}