forked from cloudfoundry/volman
/
client_local.go
190 lines (152 loc) · 5.86 KB
/
client_local.go
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package vollocal
import (
"errors"
"time"
"github.com/tedsuo/ifrit"
"os"
"code.cloudfoundry.org/clock"
loggingclient "code.cloudfoundry.org/diego-logging-client"
"code.cloudfoundry.org/lager"
"code.cloudfoundry.org/voldriver"
"code.cloudfoundry.org/volman"
"code.cloudfoundry.org/volman/voldiscoverers"
"github.com/tedsuo/ifrit/grouper"
)
const (
volmanMountErrorsCounter = "VolmanMountErrors"
volmanMountDuration = "VolmanMountDuration"
volmanUnmountErrorsCounter = "VolmanUnmountErrors"
volmanUnmountDuration = "VolmanUnmountDuration"
)
var (
pluginMountDurations = map[string]string{}
pluginUnmountDurations = map[string]string{}
)
type DriverConfig struct {
DriverPaths []string
CSIPaths []string
SyncInterval time.Duration
CSIMountRootDir string
}
func NewDriverConfig() DriverConfig {
return DriverConfig{
SyncInterval: time.Second * 30,
}
}
type localClient struct {
pluginRegistry volman.PluginRegistry
metronClient loggingclient.IngressClient
clock clock.Clock
}
func NewServer(logger lager.Logger, metronClient loggingclient.IngressClient, config DriverConfig) (volman.Manager, ifrit.Runner) {
clock := clock.NewClock()
registry := NewPluginRegistry()
dockerDiscoverer := voldiscoverers.NewDockerDriverDiscoverer(logger, registry, config.DriverPaths)
csiDiscoverer := voldiscoverers.NewCsiPluginDiscoverer(logger, registry, config.CSIPaths, config.CSIMountRootDir)
syncer := NewSyncer(logger, registry, []volman.Discoverer{dockerDiscoverer, csiDiscoverer}, config.SyncInterval, clock)
purger := NewMountPurger(logger, registry)
grouper := grouper.NewOrdered(os.Kill, grouper.Members{grouper.Member{Name: "volman-syncer", Runner: syncer.Runner()}, grouper.Member{Name: "volman-purger", Runner: purger.Runner()}})
return NewLocalClient(logger, registry, metronClient, clock), grouper
}
func NewLocalClient(logger lager.Logger, registry volman.PluginRegistry, metronClient loggingclient.IngressClient, clock clock.Clock) volman.Manager {
return &localClient{
pluginRegistry: registry,
metronClient: metronClient,
clock: clock,
}
}
func (client *localClient) ListDrivers(logger lager.Logger) (volman.ListDriversResponse, error) {
logger = logger.Session("list-drivers")
logger.Info("start")
defer logger.Info("end")
var infoResponses []volman.InfoResponse
plugins := client.pluginRegistry.Plugins()
for name, _ := range plugins {
infoResponses = append(infoResponses, volman.InfoResponse{Name: name})
}
logger.Debug("listing-drivers", lager.Data{"drivers": infoResponses})
return volman.ListDriversResponse{Drivers: infoResponses}, nil
}
func (client *localClient) Mount(logger lager.Logger, pluginId string, volumeId string, config map[string]interface{}) (volman.MountResponse, error) {
logger = logger.Session("mount")
logger.Info("start")
defer logger.Info("end")
mountStart := client.clock.Now()
defer func() {
sendMountDurationMetrics(logger, client.metronClient, time.Since(mountStart), pluginId)
}()
logger.Debug("plugin-mounting-volume", lager.Data{"pluginId": pluginId, "volumeId": volumeId})
plugin, found := client.pluginRegistry.Plugin(pluginId)
if !found {
err := errors.New("Plugin '" + pluginId + "' not found in list of known plugins")
logger.Error("mount-plugin-lookup-error", err)
client.metronClient.IncrementCounter(volmanMountErrorsCounter)
return volman.MountResponse{}, err
}
mountResponse, err := plugin.Mount(logger, volumeId, config)
if err != nil {
client.metronClient.IncrementCounter(volmanMountErrorsCounter)
if voldriverSafeErr, ok := err.(voldriver.SafeError); ok {
return volman.MountResponse{}, volman.SafeError{SafeDescription: voldriverSafeErr.SafeDescription}
}
return volman.MountResponse{}, err
}
return mountResponse, nil
}
func sendMountDurationMetrics(logger lager.Logger, metronClient loggingclient.IngressClient, duration time.Duration, pluginId string) {
err := metronClient.SendDuration(volmanMountDuration, duration)
if err != nil {
logger.Error("failed-to-send-volman-mount-duration-metric", err)
}
m, ok := pluginMountDurations[pluginId]
if !ok {
m = "VolmanMountDurationFor" + pluginId
pluginMountDurations[pluginId] = m
}
err = metronClient.SendDuration(m, duration)
if err != nil {
logger.Error("failed-to-send-volman-mount-duration-metric", err)
}
}
func sendUnmountDurationMetrics(logger lager.Logger, metronClient loggingclient.IngressClient, duration time.Duration, pluginId string) {
err := metronClient.SendDuration(volmanUnmountDuration, duration)
if err != nil {
logger.Error("failed-to-send-volman-unmount-duration-metric", err)
}
m, ok := pluginUnmountDurations[pluginId]
if !ok {
m = "VolmanUnmountDurationFor" + pluginId
pluginUnmountDurations[pluginId] = m
}
err = metronClient.SendDuration(m, duration)
if err != nil {
logger.Error("failed-to-send-volman-unmount-duration-metric", err)
}
}
func (client *localClient) Unmount(logger lager.Logger, pluginId string, volumeId string) error {
logger = logger.Session("unmount")
logger.Info("start")
defer logger.Info("end")
logger.Debug("unmounting-volume", lager.Data{"volumeName": volumeId})
unmountStart := client.clock.Now()
defer func() {
sendUnmountDurationMetrics(logger, client.metronClient, time.Since(unmountStart), pluginId)
}()
plugin, found := client.pluginRegistry.Plugin(pluginId)
if !found {
err := errors.New("Plugin '" + pluginId + "' not found in list of known plugins")
logger.Error("mount-plugin-lookup-error", err)
client.metronClient.IncrementCounter(volmanUnmountErrorsCounter)
return err
}
err := plugin.Unmount(logger, volumeId)
if err != nil {
client.metronClient.IncrementCounter(volmanUnmountErrorsCounter)
logger.Error("unmount-failed", err)
if voldriverSafeErr, ok := err.(voldriver.SafeError); ok {
return volman.SafeError{SafeDescription: voldriverSafeErr.SafeDescription}
}
return err
}
return nil
}