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Merge pull request #761 from c88888/nats
nats plugin
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| # Provides metrics about the state of a NATS server | ||
| # This plugin does NOT support FreeBSD | ||
| # # collect interval | ||
| # interval = 15 | ||
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| [[instances]] | ||
| ## The address of the monitoring endpoint of the NATS server | ||
| # server = "http://localhost:8222" | ||
| server = "" | ||
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| ## Set response_timeout (default 5 seconds) | ||
| response_timeout = "5s" | ||
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| ## interval = global.interval * interval_times | ||
| # interval_times = 1 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package nats | ||
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| import ( | ||
| "encoding/json" | ||
| "flashcat.cloud/categraf/config" | ||
| "flashcat.cloud/categraf/inputs" | ||
| "flashcat.cloud/categraf/types" | ||
| gnatsd "github.com/nats-io/nats-server/v2/server" | ||
| "io" | ||
| "log" | ||
| "net/http" | ||
| "net/url" | ||
| "path" | ||
| "time" | ||
| ) | ||
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| const inputName = "nats" | ||
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| type Nats struct { | ||
| config.PluginConfig | ||
| Instances []*Instance `toml:"instances"` | ||
| } | ||
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| func init() { | ||
| inputs.Add(inputName, func() inputs.Input { | ||
| return &Nats{} | ||
| }) | ||
| } | ||
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| func (n *Nats) Clone() inputs.Input { | ||
| return &Nats{} | ||
| } | ||
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| func (n *Nats) Name() string { | ||
| return inputName | ||
| } | ||
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| func (n *Nats) GetInstances() []inputs.Instance { | ||
| ret := make([]inputs.Instance, len(n.Instances)) | ||
| for i := 0; i < len(n.Instances); i++ { | ||
| ret[i] = n.Instances[i] | ||
| } | ||
| return ret | ||
| } | ||
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| type Instance struct { | ||
| Server string `toml:"server"` | ||
| ResponseTimeout config.Duration `toml:"response_timeout"` | ||
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| client *http.Client | ||
| config.HTTPCommonConfig | ||
| config.InstanceConfig | ||
| } | ||
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| func (ins *Instance) Init() error { | ||
| if ins.Server == "" { | ||
| return types.ErrInstancesEmpty | ||
| } | ||
| if ins.ResponseTimeout <= 0 { | ||
| ins.ResponseTimeout = config.Duration(time.Second * 5) | ||
| } | ||
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| ins.InitHTTPClientConfig() | ||
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| var err error | ||
| ins.client, err = ins.createHTTPClient() | ||
| return err | ||
| } | ||
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| func (ins *Instance) Gather(slist *types.SampleList) { | ||
| if config.Config.DebugMode { | ||
| log.Println("D! nats... server:", ins.Server) | ||
| } | ||
| address, err := url.Parse(ins.Server) | ||
| if err != nil { | ||
| log.Println("E! error parseURL", err) | ||
| return | ||
| } | ||
| address.Path = path.Join(address.Path, "varz") | ||
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| resp, err := ins.client.Get(address.String()) | ||
| if err != nil { | ||
| log.Println("E! error while polling", address.String(), err) | ||
| return | ||
| } | ||
| defer resp.Body.Close() | ||
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| bytes, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| log.Println("E! error reading body", err) | ||
| return | ||
| } | ||
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| stats := new(gnatsd.Varz) | ||
| err = json.Unmarshal(bytes, &stats) | ||
| if err != nil { | ||
| log.Println("E! error parsing response", err) | ||
| return | ||
| } | ||
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| fields := map[string]interface{}{ | ||
| "in_msgs": stats.InMsgs, | ||
| "out_msgs": stats.OutMsgs, | ||
| "in_bytes": stats.InBytes, | ||
| "out_bytes": stats.OutBytes, | ||
| "uptime": stats.Now.Sub(stats.Start).Nanoseconds(), | ||
| "cores": stats.Cores, | ||
| "cpu": stats.CPU, | ||
| "mem": stats.Mem, | ||
| "connections": stats.Connections, | ||
| "total_connections": stats.TotalConnections, | ||
| "subscriptions": stats.Subscriptions, | ||
| "slow_consumers": stats.SlowConsumers, | ||
| "routes": stats.Routes, | ||
| "remotes": stats.Remotes, | ||
| } | ||
| tags := map[string]string{ | ||
| "server": ins.Server, | ||
| } | ||
| slist.PushSamples(inputName, fields, tags) | ||
| } | ||
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| func (ins *Instance) createHTTPClient() (*http.Client, error) { | ||
| tr := &http.Transport{ | ||
| ResponseHeaderTimeout: time.Duration(ins.ResponseTimeout), | ||
| } | ||
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| client := &http.Client{ | ||
| Transport: tr, | ||
| Timeout: time.Duration(ins.ResponseTimeout), | ||
| } | ||
| return client, nil | ||
| } |