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Merge branch 'master' into namespace

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This commit is contained in:
ben-toogood
2020-04-02 18:05:21 +01:00
committed by GitHub
parent cfde3ec3d9 31c4452fc7
commit 61f0619e97
9 changed files with 18 additions and 440 deletions
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4
debug/log/kubernetes/stream.go
View File

@@ -4,6 +4,7 @@ import (
"encoding/json"
"fmt"
"os"
"sync"
"github.com/micro/go-micro/v2/debug/log"
)
@@ -20,6 +21,7 @@ func write(l log.Record) error {
type kubeStream struct {
// the k8s log stream
stream chan log.Record
sync.Mutex
// the stop chan
stop chan bool
}
@@ -29,6 +31,8 @@ func (k *kubeStream) Chan() <-chan log.Record {
}
func (k *kubeStream) Stop() error {
k.Lock()
defer k.Unlock()
select {
case <-k.stop:
return nil

329
monitor/default.go
View File

@@ -1,329 +0,0 @@
package monitor
import (
"context"
"errors"
"sync"
"time"
"github.com/micro/go-micro/v2/client"
pb "github.com/micro/go-micro/v2/debug/service/proto"
"github.com/micro/go-micro/v2/registry"
"github.com/micro/go-micro/v2/registry/cache"
)
type monitor struct {
options Options
exit chan bool
registry cache.Cache
client client.Client
sync.RWMutex
running bool
services map[string]*Status
}
func (m *monitor) Check(service string) error {
status, err := m.check(service)
if err != nil {
return err
}
m.Lock()
m.services[service] = status
m.Unlock()
if status.Code != StatusRunning {
return errors.New(status.Info)
}
return nil
}
// check provides binary running/failed status.
// In the event Debug.Health cannot be called on a service we reap the node.
func (m *monitor) check(service string) (*Status, error) {
services, err := m.registry.GetService(service)
if err != nil {
return nil, err
}
// create debug client
debug := pb.NewDebugService(service, m.client)
var status *Status
var gerr error
// iterate through multiple versions of a service
for _, service := range services {
for _, node := range service.Nodes {
// TODO: checks that are not just RPC based
// TODO: better matching of the protocol
// TODO: maybe everything has to be a go-micro service?
if node.Metadata["server"] != m.client.String() {
continue
}
// check the transport matches
if node.Metadata["transport"] != m.client.Options().Transport.String() {
continue
}
rsp, err := debug.Health(
context.Background(),
// empty health request
&pb.HealthRequest{},
// call this specific node
client.WithAddress(node.Address),
// retry in the event of failure
client.WithRetries(3),
)
if err != nil {
// save the error
gerr = err
continue
}
// expecting ok response status
if rsp.Status != "ok" {
gerr = errors.New(rsp.Status)
continue
}
// no error set status
status = &Status{
Code: StatusRunning,
Info: "running",
}
}
}
// if we got the success case return it
if status != nil {
return status, nil
}
// if gerr is not nil return it
if gerr != nil {
return &Status{
Code: StatusFailed,
Info: "not running",
Error: gerr.Error(),
}, nil
}
// otherwise unknown status
return &Status{
Code: StatusUnknown,
Info: "unknown status",
}, nil
}
func (m *monitor) reap() {
services, err := m.registry.ListServices()
if err != nil {
return
}
serviceMap := make(map[string]bool)
for _, service := range services {
serviceMap[service.Name] = true
}
m.Lock()
defer m.Unlock()
// range over our watched services
for service := range m.services {
// check if the service exists in the registry
if !serviceMap[service] {
// if not, delete it in our status map
delete(m.services, service)
}
}
}
func (m *monitor) run() {
// check the status every tick
t := time.NewTicker(time.Minute)
defer t.Stop()
// reap dead services
t2 := time.NewTicker(time.Hour)
defer t2.Stop()
// list the known services
services, _ := m.registry.ListServices()
// create a check chan of same length
check := make(chan string, len(services))
// front-load the services to watch
for _, service := range services {
check <- service.Name
}
for {
select {
// exit if we're told to
case <-m.exit:
return
// check a service when told to
case service := <-check:
// check the status
status, err := m.check(service)
if err != nil {
status = &Status{
Code: StatusUnknown,
Info: "unknown status",
}
}
// save the status
m.Lock()
m.services[service] = status
m.Unlock()
// on the tick interval get all services and issue a check
case <-t.C:
// create a list of services
serviceMap := make(map[string]bool)
m.RLock()
for service := range m.services {
serviceMap[service] = true
}
m.RUnlock()
go func() {
// check the status of all watched services
for service := range serviceMap {
select {
case <-m.exit:
return
case check <- service:
default:
// barf if we block
}
}
// list services
services, _ := m.registry.ListServices()
for _, service := range services {
// start watching the service
if ok := serviceMap[service.Name]; !ok {
m.Watch(service.Name)
}
}
}()
case <-t2.C:
// reap any dead/non-existent services
m.reap()
}
}
}
func (m *monitor) Reap(service string) error {
services, err := m.registry.GetService(service)
if err != nil {
return nil
}
m.Lock()
defer m.Unlock()
delete(m.services, service)
for _, service := range services {
m.registry.Deregister(service)
}
return nil
}
func (m *monitor) Status(service string) (Status, error) {
m.RLock()
defer m.RUnlock()
if status, ok := m.services[service]; ok {
return *status, nil
}
return Status{}, ErrNotWatching
}
func (m *monitor) Watch(service string) error {
m.Lock()
defer m.Unlock()
// check if we're watching
if _, ok := m.services[service]; ok {
return nil
}
// get the status
status, err := m.check(service)
if err != nil {
return err
}
// set the status
m.services[service] = status
return nil
}
func (m *monitor) Run() error {
m.Lock()
defer m.Unlock()
if m.running {
return nil
}
// reset the exit channel
m.exit = make(chan bool)
// setup a new cache
m.registry = cache.New(m.options.Registry)
// start running
go m.run()
// set to running
m.running = true
return nil
}
func (m *monitor) Stop() error {
m.Lock()
defer m.Unlock()
if !m.running {
return nil
}
select {
case <-m.exit:
return nil
default:
close(m.exit)
for s := range m.services {
delete(m.services, s)
}
m.registry.Stop()
m.running = false
return nil
}
}
func newMonitor(opts ...Option) Monitor {
options := Options{
Client: client.DefaultClient,
Registry: registry.DefaultRegistry,
}
for _, o := range opts {
o(&options)
}
return &monitor{
options: options,
exit: make(chan bool),
client: options.Client,
registry: cache.New(options.Registry),
services: make(map[string]*Status),
}
}

37
monitor/default_test.go
View File

@@ -1,37 +0,0 @@
package monitor
import (
"testing"
)
func TestMonitor(t *testing.T) {
// create new monitor
m := NewMonitor()
if err := m.Run(); err != nil {
t.Fatalf("failed to stop monitor: %v", err)
}
services := []string{"foo", "bar", "baz"}
for _, service := range services {
_, err := m.Status(service)
if err == nil {
t.Fatal("expected status error for unknown service")
}
if err := m.Watch(service); err == nil {
t.Fatal("expected watch error for unknown service")
}
// TODO:
// 1. start a service
// 2. watch service
// 3. get service status
}
// stop monitor
if err := m.Stop(); err != nil {
t.Fatalf("failed to stop monitor: %v", err)
}
}

45
monitor/monitor.go
View File

@@ -1,45 +0,0 @@
// Package monitor monitors service health
package monitor
import (
"errors"
)
const (
StatusUnknown StatusCode = iota
StatusRunning
StatusFailed
)
type StatusCode int
// Monitor monitors a service and reaps dead instances
type Monitor interface {
// Reap a service and stop monitoring
Reap(service string) error
// Check the status of the service now
Check(service string) error
// Status of the service
Status(service string) (Status, error)
// Watch starts watching the service
Watch(service string) error
// Run the monitor to watch all services
Run() error
// Stop monitoring
Stop() error
}
type Status struct {
Code StatusCode
Info string
Error string
}
var (
ErrNotWatching = errors.New("not watching")
)
// NewMonitor returns a new monitor
func NewMonitor(opts ...Option) Monitor {
return newMonitor(opts...)
}

25
monitor/options.go
View File

@@ -1,25 +0,0 @@
package monitor
import (
"github.com/micro/go-micro/v2/client"
"github.com/micro/go-micro/v2/registry"
)
type Options struct {
Client client.Client
Registry registry.Registry
}
type Option func(*Options)
func Client(c client.Client) Option {
return func(o *Options) {
o.Client = c
}
}
func Registry(r registry.Registry) Option {
return func(o *Options) {
o.Registry = r
}
}

7
runtime/default.go
View File

@@ -259,8 +259,9 @@ type logStream struct {
tail *tail.Tail
service string
stream chan LogRecord
stop chan bool
err error
sync.Mutex
stop chan bool
err error
}
func (l *logStream) Chan() chan LogRecord {
@@ -272,6 +273,8 @@ func (l *logStream) Error() error {
}
func (l *logStream) Stop() error {
l.Lock()
defer l.Unlock()
// @todo seems like this is causing a hangup
//err := l.tail.Stop()
//if err != nil {

3
runtime/kubernetes/kubernetes.go
View File

@@ -330,6 +330,7 @@ type kubeStream struct {
// the k8s log stream
stream chan runtime.LogRecord
// the stop chan
sync.Mutex
stop chan bool
err error
}
@@ -343,6 +344,8 @@ func (k *kubeStream) Chan() chan runtime.LogRecord {
}
func (k *kubeStream) Stop() error {
k.Lock()
defer k.Unlock()
select {
case <-k.stop:
return nil

1
runtime/kubernetes/kubernetes_logs.go
View File

@@ -32,6 +32,7 @@ func (k *klog) podLogStream(podName string, stream *kubeStream) error {
if err != nil {
stream.err = err
stream.Stop()
return err
}

7
runtime/service/service.go
View File

@@ -95,8 +95,9 @@ func (s *svc) Logs(service *runtime.Service, options ...runtime.LogsOption) (run
type serviceLogStream struct {
service string
stream chan runtime.LogRecord
stop chan bool
err error
sync.Mutex
stop chan bool
err error
}
func (l *serviceLogStream) Error() error {
@@ -108,6 +109,8 @@ func (l *serviceLogStream) Chan() chan runtime.LogRecord {
}
func (l *serviceLogStream) Stop() error {
l.Lock()
defer l.Unlock()
select {
case <-l.stop:
return nil