Feature/opentelemetry (#89)

* initial adds for otel tracing

* initial basic testing

* basic tracing for incoming calls

* linting

* add traceId to the webhook params

* trace webhook calls

* tracing: add new commands as tags when receiving async commands over websocket

* tracing new commands

* add summary for config verb

* trace async commands

* bugfix: undefined ref

* tracing: give time for final webhooks before closing root span

* tracing bugfix: span for background gather was not ended

* tracing - minor tag changes

* tracing - add span atttribute for reason call ended

* trace call status webhooks, add app version to trace output

* config: add support for automatically re-enabling

* env var to customize service name in tracing UI

* config: change to use 'sticky' attribute to re-enable bargein automatically

* fix warnings

* when adulting create a new root span

* when background gather triggers bargein via vad clear queue of tasks

* additional trace attributes for dial and refer

* fix dial tracing

* add better summary for dial

* fix prev commit

* add exponential backoff to WsRequestor reconnection logic

* add calling number to log metadata, as this will be frequently the key data given for troubleshooting

* add accountSid to log metadata

* make handshake timeout for ws connections configurable with default 1.5 secs

* rename env var

* fix bug prev checkin

* logging fixes

* consistent env naming

lib/http-routes/api/create-call.js

@@ -8,6 +8,7 @@ const SipError = require('drachtio-srf').SipError;
 const sysError = require('./error');
 const HttpRequestor = require('../../utils/http-requestor');
 const WsRequestor = require('../../utils/ws-requestor');
+const RootSpan = require('../../utils/call-tracer');
 const dbUtils = require('../../utils/db-utils');
 
 router.post('/', async(req, res) => {
@@ -143,6 +144,7 @@ router.post('/', async(req, res) => {
           /* ok our outbound INVITE is in flight */
 
           const tasks = [restDial];
+          const rootSpan = new RootSpan('rest-call', req);
           const callInfo = new CallInfo({
             direction: CallDirection.Outbound,
             req: inviteReq,
@@ -150,9 +152,20 @@ router.post('/', async(req, res) => {
             tag: app.tag,
             callSid,
             accountSid: req.body.account_sid,
-            applicationSid: app.application_sid
+            applicationSid: app.application_sid,
+            traceId: this.rootSpan.traceId
+          });
+          cs = new RestCallSession({
+            logger,
+            application: app,
+            srf,
+            req: inviteReq,
+            ep,
+            tasks,
+            callInfo,
+            accountInfo,
+            rootSpan
           });
-          cs = new RestCallSession({logger, application: app, srf, req: inviteReq, ep, tasks, callInfo, accountInfo});
           cs.exec(req);
 
           res.status(201).json({sid: cs.callSid});