telegraf/plugins/inputs/nginx_plus_api/nginx_plus_api.go

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2018-10-22 19:54:50 +00:00
package nginx_plus_api
import (
"fmt"
"net/http"
"net/url"
"sync"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal"
"github.com/influxdata/telegraf/plugins/inputs"
)
type NginxPlusApi struct {
Urls []string
ApiVersion int64
client *http.Client
ResponseTimeout internal.Duration
}
const (
// Default settings
defaultApiVersion = 3
// Paths
processesPath = "processes"
connectionsPath = "connections"
sslPath = "ssl"
httpRequestsPath = "http/requests"
httpServerZonesPath = "http/server_zones"
httpUpstreamsPath = "http/upstreams"
httpCachesPath = "http/caches"
streamServerZonesPath = "stream/server_zones"
streamUpstreamsPath = "stream/upstreams"
)
var sampleConfig = `
## An array of API URI to gather stats.
urls = ["http://localhost/api"]
# Nginx API version, default: 3
# api_version = 3
# HTTP response timeout (default: 5s)
response_timeout = "5s"
`
func (n *NginxPlusApi) SampleConfig() string {
return sampleConfig
}
func (n *NginxPlusApi) Description() string {
return "Read Nginx Plus Api documentation"
}
func (n *NginxPlusApi) Gather(acc telegraf.Accumulator) error {
var wg sync.WaitGroup
// Create an HTTP client that is re-used for each
// collection interval
if n.ApiVersion == 0 {
n.ApiVersion = defaultApiVersion
}
if n.client == nil {
client, err := n.createHttpClient()
if err != nil {
return err
}
n.client = client
}
for _, u := range n.Urls {
addr, err := url.Parse(u)
if err != nil {
acc.AddError(fmt.Errorf("Unable to parse address '%s': %s", u, err))
continue
}
wg.Add(1)
go func(addr *url.URL) {
defer wg.Done()
n.gatherMetrics(addr, acc)
}(addr)
}
wg.Wait()
return nil
}
func (n *NginxPlusApi) createHttpClient() (*http.Client, error) {
if n.ResponseTimeout.Duration < time.Second {
n.ResponseTimeout.Duration = time.Second * 5
}
client := &http.Client{
Transport: &http.Transport{},
Timeout: n.ResponseTimeout.Duration,
}
return client, nil
}
func init() {
inputs.Add("nginx_plus_api", func() telegraf.Input {
return &NginxPlusApi{}
})
}