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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package gnmiclient | ||
|
|
||
| import ( | ||
| "context" | ||
| log "github.com/golang/glog" | ||
| "github.com/openconfig/gnmi/proto/gnmi" | ||
| "github.com/openconfig/ygot/ygot" | ||
| ) | ||
|
|
||
| // subscribe creates a subscription client and sends SubscribeRequests to the server. | ||
| // It returns the subscription client and any error encountered during the process. | ||
| func (c *GnmiClient) subscribe(ctx context.Context, stub gnmi.GNMIClient) (gnmi.GNMI_SubscribeClient, error) { | ||
| // Create client | ||
| gNMISubClt, err := stub.Subscribe(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if c.config.OverSampling == 0 { | ||
| c.config.OverSampling = oversampling | ||
| } | ||
| if c.config.OverSampling < 1 || c.config.OverSampling > 10 { | ||
| log.Warningf("%s: Oversampling must fall between 1 and 10", c.config.DevName) | ||
| c.config.OverSampling = oversampling | ||
| } | ||
|
|
||
| // Prepare the subscription list | ||
| subLists := c.newSubList() | ||
|
|
||
| // Subscribe | ||
| for _, sl := range subLists { | ||
| // Prepare the SubscribeRequest struct | ||
| req := &gnmi.SubscribeRequest{ | ||
| Request: &gnmi.SubscribeRequest_Subscribe{Subscribe: sl}, | ||
| Extension: nil, | ||
| } | ||
| // Send it to the device | ||
| err = gNMISubClt.Send(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| return gNMISubClt, nil | ||
| } | ||
|
|
||
| // newSubList creates a list with a single subscriptions for all the configured plugins. | ||
| // This is the default way for subscribing telemetries. | ||
| func (c *GnmiClient) newSubList() []*gnmi.SubscriptionList { | ||
| var subs []*gnmi.Subscription | ||
| var subLists []*gnmi.SubscriptionList | ||
|
|
||
| for _, plug := range c.plugins { | ||
| for _, path := range c.xPathList[plug.GetPlugName()] { | ||
| // Huawei requires prepending the datamodel name to paths | ||
| if c.config.Vendor == "huawei" { | ||
| path = plug.GetDataModel() + ":" + path[1:] | ||
| } | ||
|
|
||
| // One subscription for each plugin's path | ||
| p, err := ygot.StringToPath(path, ygot.StructuredPath, ygot.StringSlicePath) | ||
| if err != nil { | ||
| log.Error(err) | ||
| continue | ||
| } | ||
| newSub := &gnmi.Subscription{ | ||
| Path: p, | ||
| Mode: c.config.GnmiSubscriptionMode, | ||
| SampleInterval: uint64(c.config.ScrapeInterval.Nanoseconds() / c.config.OverSampling), | ||
| SuppressRedundant: false, | ||
| HeartbeatInterval: 0, | ||
| } | ||
| subs = append(subs, newSub) | ||
| } | ||
| } | ||
|
|
||
| // One subscription list per device | ||
| subLists = append(subLists, &gnmi.SubscriptionList{ | ||
| Prefix: nil, | ||
| Subscription: subs, | ||
| Qos: nil, | ||
| Mode: gnmi.SubscriptionList_STREAM, | ||
| AllowAggregation: false, | ||
| UseModels: nil, | ||
| Encoding: c.encoding, | ||
| UpdatesOnly: c.config.GnmiUpdatesOnly, | ||
| }) | ||
|
|
||
| return subLists | ||
| } |
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