Rainbond/monitor/callback/node.go

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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package callback
import (
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/discover"
"github.com/goodrain/rainbond/discover/config"
"github.com/goodrain/rainbond/monitor/prometheus"
"github.com/goodrain/rainbond/util/watch"
"github.com/goodrain/rainbond/monitor/utils"
"github.com/prometheus/common/model"
"time"
"github.com/tidwall/gjson"
)
type Node struct {
discover.Callback
Prometheus *prometheus.Manager
sortedEndpoints []string
endpoints []*config.Endpoint
}
func (e *Node) UpdateEndpoints(endpoints ...*config.Endpoint) {
newArr := utils.TrimAndSort(endpoints)
if utils.ArrCompare(e.sortedEndpoints, newArr) {
logrus.Debugf("The endpoints is not modify: %s", e.Name())
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return
}
e.sortedEndpoints = newArr
scrape := e.toScrape()
e.Prometheus.UpdateScrape(scrape)
}
func (e *Node) Error(err error) {
logrus.Error(err)
}
func (e *Node) Name() string {
return "rbd_node"
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}
func (e *Node) toScrape() *prometheus.ScrapeConfig {
ts := make([]string, 0, len(e.sortedEndpoints))
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for _, end := range e.sortedEndpoints {
ts = append(ts, end)
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}
return &prometheus.ScrapeConfig{
JobName: e.Name(),
ScrapeInterval: model.Duration(30 * time.Second),
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ScrapeTimeout: model.Duration(30 * time.Second),
MetricsPath: "/node/metrics",
ServiceDiscoveryConfig: prometheus.ServiceDiscoveryConfig{
StaticConfigs: []*prometheus.Group{
{
Targets: ts,
Labels: map[model.LabelName]model.LabelValue{
"component": model.LabelValue(e.Name()),
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},
},
},
},
}
}
func (e *Node) AddEndpoint(end *config.Endpoint) {
e.endpoints = append(e.endpoints, end)
e.UpdateEndpoints(e.endpoints...)
}
func (e *Node) Add(event *watch.Event) {
url := gjson.Get(event.GetValueString(), "external_ip").String() + ":6100"
end := &config.Endpoint{
URL: url,
}
e.AddEndpoint(end)
}
func (e *Node) Modify(event *watch.Event) {
for i, end := range e.endpoints {
if end.URL == event.GetValueString() {
url := gjson.Get(event.GetValueString(), "external_ip").String() + ":6100"
e.endpoints[i].URL = url
e.UpdateEndpoints(e.endpoints...)
break
}
}
}
func (e *Node) Delete(event *watch.Event) {
for i, end := range e.endpoints {
url := gjson.Get(event.GetValueString(), "external_ip").String() + ":6100"
if end.URL == url {
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e.endpoints = append(e.endpoints[:i], e.endpoints[i+1:]...)
e.UpdateEndpoints(e.endpoints...)
break
}
}
}