/
builder.go
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/
builder.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 (
"time"
"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/monitor/utils"
"github.com/prometheus/common/model"
"github.com/tidwall/gjson"
)
//Builder builder
type Builder struct {
discover.Callback
Prometheus *prometheus.Manager
sortedEndpoints []string
}
//UpdateEndpoints update endpoints
func (b *Builder) UpdateEndpoints(endpoints ...*config.Endpoint) {
// 用v3 API注册,返回json格试,所以要提前处理一下
newEndpoints := make([]*config.Endpoint, 0, len(endpoints))
for _, end := range endpoints {
newEnd := *end
newEndpoints = append(newEndpoints, &newEnd)
}
for i, end := range endpoints {
newEndpoints[i].URL = gjson.Get(end.URL, "Addr").String()
}
newArr := utils.TrimAndSort(newEndpoints)
if utils.ArrCompare(b.sortedEndpoints, newArr) {
logrus.Debugf("The endpoints is not modify: %s", b.Name())
return
}
b.sortedEndpoints = newArr
scrape := b.toScrape()
b.Prometheus.UpdateScrape(scrape)
}
//Error handle error
func (b *Builder) Error(err error) {
logrus.Error(err)
}
//Name name
func (b *Builder) Name() string {
return "builder"
}
func (b *Builder) toScrape() *prometheus.ScrapeConfig {
ts := make([]string, 0, len(b.sortedEndpoints))
for _, end := range b.sortedEndpoints {
ts = append(ts, end)
}
return &prometheus.ScrapeConfig{
JobName: b.Name(),
ScrapeInterval: model.Duration(time.Minute),
ScrapeTimeout: model.Duration(30 * time.Second),
MetricsPath: "/metrics",
HonorLabels: true,
ServiceDiscoveryConfig: prometheus.ServiceDiscoveryConfig{
StaticConfigs: []*prometheus.Group{
{
Targets: ts,
Labels: map[model.LabelName]model.LabelValue{
"service_name": model.LabelValue(b.Name()),
"component": model.LabelValue(b.Name()),
},
},
},
},
}
}