mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-19 23:37:31 -07:00
discovery: fix+consolidate Zookeeper discoveries
This commit is contained in:
Fabian Reinartz
parent
b4d7ce1370
commit
a1eec447a4
|
|
@ -1,144 +0,0 @@
|
|||
// Copyright 2015 The Prometheus Authors
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package discovery
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"net"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/prometheus/common/model"
|
||||
"github.com/samuel/go-zookeeper/zk"
|
||||
"golang.org/x/net/context"
|
||||
|
||||
"github.com/prometheus/prometheus/config"
|
||||
"github.com/prometheus/prometheus/util/treecache"
|
||||
)
|
||||
|
||||
const (
|
||||
nerveLabelPrefix = model.MetaLabelPrefix + "nerve_"
|
||||
nervePathLabel = nerveLabelPrefix + "path"
|
||||
nerveEndpointLabelPrefix = nerveLabelPrefix + "endpoint"
|
||||
)
|
||||
|
||||
type nerveMember struct {
|
||||
Host string `json:"host"`
|
||||
Port int `json:"port"`
|
||||
Name string `json:"name"`
|
||||
}
|
||||
|
||||
// NerveDiscovery retrieves target information from a Nerve server
|
||||
// and updates them via watches.
|
||||
type NerveDiscovery struct {
|
||||
conf *config.NerveSDConfig
|
||||
conn *zk.Conn
|
||||
mu sync.RWMutex
|
||||
sources map[string]*config.TargetGroup
|
||||
sdUpdates *chan<- []*config.TargetGroup
|
||||
updates chan treecache.ZookeeperTreeCacheEvent
|
||||
treeCaches []*treecache.ZookeeperTreeCache
|
||||
}
|
||||
|
||||
// NewNerveDiscovery returns a new NerveDiscovery for the given config.
|
||||
func NewNerveDiscovery(conf *config.NerveSDConfig) *NerveDiscovery {
|
||||
conn, _, err := zk.Connect(conf.Servers, time.Duration(conf.Timeout))
|
||||
conn.SetLogger(treecache.ZookeeperLogger{})
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
updates := make(chan treecache.ZookeeperTreeCacheEvent)
|
||||
sd := &NerveDiscovery{
|
||||
conf: conf,
|
||||
conn: conn,
|
||||
updates: updates,
|
||||
sources: map[string]*config.TargetGroup{},
|
||||
}
|
||||
go sd.processUpdates()
|
||||
for _, path := range conf.Paths {
|
||||
sd.treeCaches = append(sd.treeCaches, treecache.NewZookeeperTreeCache(conn, path, updates))
|
||||
}
|
||||
return sd
|
||||
}
|
||||
|
||||
func (sd *NerveDiscovery) processUpdates() {
|
||||
defer sd.conn.Close()
|
||||
for event := range sd.updates {
|
||||
tg := &config.TargetGroup{
|
||||
Source: event.Path,
|
||||
}
|
||||
sd.mu.Lock()
|
||||
if event.Data != nil {
|
||||
labelSet, err := parseNerveMember(*event.Data, event.Path)
|
||||
if err == nil {
|
||||
tg.Targets = []model.LabelSet{*labelSet}
|
||||
sd.sources[event.Path] = tg
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
sd.mu.Unlock()
|
||||
if sd.sdUpdates != nil {
|
||||
*sd.sdUpdates <- []*config.TargetGroup{tg}
|
||||
}
|
||||
}
|
||||
|
||||
if sd.sdUpdates != nil {
|
||||
close(*sd.sdUpdates)
|
||||
}
|
||||
}
|
||||
|
||||
// Run implements the TargetProvider interface.
|
||||
func (sd *NerveDiscovery) Run(ctx context.Context, ch chan<- []*config.TargetGroup) {
|
||||
// Send on everything we have seen so far.
|
||||
sd.mu.Lock()
|
||||
|
||||
all := make([]*config.TargetGroup, 0, len(sd.sources))
|
||||
|
||||
for _, tg := range sd.sources {
|
||||
all = append(all, tg)
|
||||
}
|
||||
ch <- all
|
||||
|
||||
// Tell processUpdates to send future updates.
|
||||
sd.sdUpdates = &ch
|
||||
sd.mu.Unlock()
|
||||
|
||||
<-ctx.Done()
|
||||
for _, tc := range sd.treeCaches {
|
||||
tc.Stop()
|
||||
}
|
||||
}
|
||||
|
||||
func parseNerveMember(data []byte, path string) (*model.LabelSet, error) {
|
||||
member := nerveMember{}
|
||||
err := json.Unmarshal(data, &member)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("error unmarshaling nerve member %q: %s", path, err)
|
||||
}
|
||||
|
||||
labels := model.LabelSet{}
|
||||
labels[nervePathLabel] = model.LabelValue(path)
|
||||
labels[model.AddressLabel] = model.LabelValue(
|
||||
net.JoinHostPort(member.Host, fmt.Sprintf("%d", member.Port)))
|
||||
|
||||
labels[nerveEndpointLabelPrefix+"_host"] = model.LabelValue(member.Host)
|
||||
labels[nerveEndpointLabelPrefix+"_port"] = model.LabelValue(fmt.Sprintf("%d", member.Port))
|
||||
labels[nerveEndpointLabelPrefix+"_name"] = model.LabelValue(member.Name)
|
||||
|
||||
return &labels, nil
|
||||
}
|
||||
|
|
@ -18,7 +18,6 @@ import (
|
|||
"fmt"
|
||||
"net"
|
||||
"strconv"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/prometheus/common/model"
|
||||
|
|
@ -30,6 +29,92 @@ import (
|
|||
"github.com/prometheus/prometheus/util/treecache"
|
||||
)
|
||||
|
||||
type ZookeeperDiscovery struct {
|
||||
conn *zk.Conn
|
||||
|
||||
sources map[string]*config.TargetGroup
|
||||
|
||||
updates chan treecache.ZookeeperTreeCacheEvent
|
||||
treeCaches []*treecache.ZookeeperTreeCache
|
||||
|
||||
parse func(data []byte, path string) (model.LabelSet, error)
|
||||
}
|
||||
|
||||
// NewNerveDiscovery returns a new NerveDiscovery for the given config.
|
||||
func NewNerveDiscovery(conf *config.NerveSDConfig) *ZookeeperDiscovery {
|
||||
return NewZookeeperDiscovery(conf.Servers, time.Duration(conf.Timeout), conf.Paths, parseNerveMember)
|
||||
}
|
||||
|
||||
// NewServersetDiscovery returns a new ServersetDiscovery for the given config.
|
||||
func NewServersetDiscovery(conf *config.ServersetSDConfig) *ZookeeperDiscovery {
|
||||
return NewZookeeperDiscovery(conf.Servers, time.Duration(conf.Timeout), conf.Paths, parseServersetMember)
|
||||
}
|
||||
|
||||
// NewZookeeperDiscovery returns a new discovery along Zookeeper parses with
|
||||
// the given parse function.
|
||||
func NewZookeeperDiscovery(
|
||||
srvs []string,
|
||||
timeout time.Duration,
|
||||
paths []string,
|
||||
pf func(data []byte, path string) (model.LabelSet, error),
|
||||
) *ZookeeperDiscovery {
|
||||
conn, _, err := zk.Connect(srvs, time.Duration(timeout))
|
||||
conn.SetLogger(treecache.ZookeeperLogger{})
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
updates := make(chan treecache.ZookeeperTreeCacheEvent)
|
||||
sd := &ZookeeperDiscovery{
|
||||
conn: conn,
|
||||
updates: updates,
|
||||
sources: map[string]*config.TargetGroup{},
|
||||
parse: pf,
|
||||
}
|
||||
for _, path := range paths {
|
||||
sd.treeCaches = append(sd.treeCaches, treecache.NewZookeeperTreeCache(conn, path, updates))
|
||||
}
|
||||
return sd
|
||||
}
|
||||
|
||||
// Run implements the TargetProvider interface.
|
||||
func (sd *ZookeeperDiscovery) Run(ctx context.Context, ch chan<- []*config.TargetGroup) {
|
||||
defer func() {
|
||||
for _, tc := range sd.treeCaches {
|
||||
tc.Stop()
|
||||
}
|
||||
// Drain event channel in case the treecache leaks goroutines otherwise.
|
||||
for range sd.updates {
|
||||
}
|
||||
sd.conn.Close()
|
||||
}()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
case event := <-sd.updates:
|
||||
tg := &config.TargetGroup{
|
||||
Source: event.Path,
|
||||
}
|
||||
if event.Data != nil {
|
||||
labelSet, err := sd.parse(*event.Data, event.Path)
|
||||
if err == nil {
|
||||
tg.Targets = []model.LabelSet{labelSet}
|
||||
sd.sources[event.Path] = tg
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return
|
||||
case ch <- []*config.TargetGroup{tg}:
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const (
|
||||
serversetLabelPrefix = model.MetaLabelPrefix + "serverset_"
|
||||
serversetStatusLabel = serversetLabelPrefix + "status"
|
||||
|
|
@ -50,91 +135,7 @@ type serversetEndpoint struct {
|
|||
Port int
|
||||
}
|
||||
|
||||
// ServersetDiscovery retrieves target information from a Serverset server
|
||||
// and updates them via watches.
|
||||
type ServersetDiscovery struct {
|
||||
conf *config.ServersetSDConfig
|
||||
conn *zk.Conn
|
||||
mu sync.RWMutex
|
||||
sources map[string]*config.TargetGroup
|
||||
sdUpdates *chan<- []*config.TargetGroup
|
||||
updates chan treecache.ZookeeperTreeCacheEvent
|
||||
treeCaches []*treecache.ZookeeperTreeCache
|
||||
}
|
||||
|
||||
// NewServersetDiscovery returns a new ServersetDiscovery for the given config.
|
||||
func NewServersetDiscovery(conf *config.ServersetSDConfig) *ServersetDiscovery {
|
||||
conn, _, err := zk.Connect(conf.Servers, time.Duration(conf.Timeout))
|
||||
conn.SetLogger(treecache.ZookeeperLogger{})
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
updates := make(chan treecache.ZookeeperTreeCacheEvent)
|
||||
sd := &ServersetDiscovery{
|
||||
conf: conf,
|
||||
conn: conn,
|
||||
updates: updates,
|
||||
sources: map[string]*config.TargetGroup{},
|
||||
}
|
||||
go sd.processUpdates()
|
||||
for _, path := range conf.Paths {
|
||||
sd.treeCaches = append(sd.treeCaches, treecache.NewZookeeperTreeCache(conn, path, updates))
|
||||
}
|
||||
return sd
|
||||
}
|
||||
|
||||
func (sd *ServersetDiscovery) processUpdates() {
|
||||
defer sd.conn.Close()
|
||||
for event := range sd.updates {
|
||||
tg := &config.TargetGroup{
|
||||
Source: event.Path,
|
||||
}
|
||||
sd.mu.Lock()
|
||||
if event.Data != nil {
|
||||
labelSet, err := parseServersetMember(*event.Data, event.Path)
|
||||
if err == nil {
|
||||
tg.Targets = []model.LabelSet{*labelSet}
|
||||
sd.sources[event.Path] = tg
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
} else {
|
||||
delete(sd.sources, event.Path)
|
||||
}
|
||||
sd.mu.Unlock()
|
||||
if sd.sdUpdates != nil {
|
||||
*sd.sdUpdates <- []*config.TargetGroup{tg}
|
||||
}
|
||||
}
|
||||
|
||||
if sd.sdUpdates != nil {
|
||||
close(*sd.sdUpdates)
|
||||
}
|
||||
}
|
||||
|
||||
// Run implements the TargetProvider interface.
|
||||
func (sd *ServersetDiscovery) Run(ctx context.Context, ch chan<- []*config.TargetGroup) {
|
||||
// Send on everything we have seen so far.
|
||||
sd.mu.Lock()
|
||||
|
||||
all := make([]*config.TargetGroup, 0, len(sd.sources))
|
||||
|
||||
for _, tg := range sd.sources {
|
||||
all = append(all, tg)
|
||||
}
|
||||
ch <- all
|
||||
|
||||
// Tell processUpdates to send future updates.
|
||||
sd.sdUpdates = &ch
|
||||
sd.mu.Unlock()
|
||||
|
||||
<-ctx.Done()
|
||||
for _, tc := range sd.treeCaches {
|
||||
tc.Stop()
|
||||
}
|
||||
}
|
||||
|
||||
func parseServersetMember(data []byte, path string) (*model.LabelSet, error) {
|
||||
func parseServersetMember(data []byte, path string) (model.LabelSet, error) {
|
||||
member := serversetMember{}
|
||||
|
||||
if err := json.Unmarshal(data, &member); err != nil {
|
||||
|
|
@ -161,5 +162,36 @@ func parseServersetMember(data []byte, path string) (*model.LabelSet, error) {
|
|||
labels[serversetStatusLabel] = model.LabelValue(member.Status)
|
||||
labels[serversetShardLabel] = model.LabelValue(strconv.Itoa(member.Shard))
|
||||
|
||||
return &labels, nil
|
||||
return labels, nil
|
||||
}
|
||||
|
||||
const (
|
||||
nerveLabelPrefix = model.MetaLabelPrefix + "nerve_"
|
||||
nervePathLabel = nerveLabelPrefix + "path"
|
||||
nerveEndpointLabelPrefix = nerveLabelPrefix + "endpoint"
|
||||
)
|
||||
|
||||
type nerveMember struct {
|
||||
Host string `json:"host"`
|
||||
Port int `json:"port"`
|
||||
Name string `json:"name"`
|
||||
}
|
||||
|
||||
func parseNerveMember(data []byte, path string) (model.LabelSet, error) {
|
||||
member := nerveMember{}
|
||||
err := json.Unmarshal(data, &member)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("error unmarshaling nerve member %q: %s", path, err)
|
||||
}
|
||||
|
||||
labels := model.LabelSet{}
|
||||
labels[nervePathLabel] = model.LabelValue(path)
|
||||
labels[model.AddressLabel] = model.LabelValue(
|
||||
net.JoinHostPort(member.Host, fmt.Sprintf("%d", member.Port)))
|
||||
|
||||
labels[nerveEndpointLabelPrefix+"_host"] = model.LabelValue(member.Host)
|
||||
labels[nerveEndpointLabelPrefix+"_port"] = model.LabelValue(fmt.Sprintf("%d", member.Port))
|
||||
labels[nerveEndpointLabelPrefix+"_name"] = model.LabelValue(member.Name)
|
||||
|
||||
return labels, nil
|
||||
}
|
||||
Loading…
Reference in a new issue