-
Notifications
You must be signed in to change notification settings - Fork 36
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #101 from srinandan/master
add support for opentracing
- Loading branch information
Showing
5 changed files
with
1,568 additions
and
3 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| const resolve = require('path').resolve; | ||
| const debug = require('debug')('trace-helper'); | ||
| //relative path to the opentracing implementation | ||
| if (process.env.EDGEMICRO_TRACE_MODULE) { | ||
| const { | ||
| initTracer | ||
| } = require(resolve(process.env.EDGEMICRO_TRACE_MODULE)); | ||
| } | ||
|
|
||
| const { | ||
| Tags, | ||
| FORMAT_HTTP_HEADERS | ||
| } = require('opentracing'); | ||
|
|
||
| var targetTrace; | ||
| var proxyTrace; | ||
| var requestspan; | ||
| var responsespan; | ||
|
|
||
| module.exports = { | ||
| initTracer: function(name, req, correlation_id) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| proxyTrace = initTracer(name); | ||
| //check if there is a parent id | ||
| if (checkUberParentId(req.headers)) { | ||
| debug("opentracing parentid found"); | ||
| requestspan = proxyTrace.extract(FORMAT_HTTP_HEADERS, req.headers); | ||
| } else { | ||
| debug("opentracing parentid not found"); | ||
| requestspan = proxyTrace.startSpan("request_start"); | ||
| } | ||
| requestspan.setTag(Tags.HTTP_URL, req.url); | ||
| requestspan.setTag(Tags.HTTP_METHOD, req.method); | ||
| requestspan.setBaggageItem('correlation_id', correlation_id); | ||
| var traceheaders = {}; | ||
| proxyTrace.inject(requestspan, FORMAT_HTTP_HEADERS, traceheaders); | ||
| for (var tracekey in traceheaders) { | ||
| if (!traceheaders.hasOwnProperty(tracekey)) { | ||
| continue; | ||
| } else { | ||
| req.headers[tracekey] = traceheaders[tracekey]; | ||
| } | ||
| } | ||
| } catch (err) {} | ||
| } | ||
| return req; | ||
| }, | ||
| endRequestSpan: function() { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| requestspan.log({ | ||
| 'event': 'request_end' | ||
| }); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| setRequestError: function(obj, msg, stack, statusCode) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| requestspan.setTag(Tags.ERROR, true); | ||
| requestspan.setTag(Tags.HTTP_STATUS_CODE, statusCode); | ||
| requestspan.log({ | ||
| 'event': 'error', | ||
| 'error.object': obj, | ||
| 'message': msg, | ||
| 'stack': stack | ||
| }); | ||
| requestspan.finish(); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| setResponseError: function(obj, msg, stack, statusCode) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| responsespan.setTag(Tags.ERROR, true); | ||
| responsespan.setTag(Tags.HTTP_STATUS_CODE, statusCode); | ||
| responsespan.log({ | ||
| 'event': 'error', | ||
| 'error.object': obj, | ||
| 'message': msg, | ||
| 'stack': stack | ||
| }); | ||
| responsespan.finish(); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| endTargetSpan: function(statusCode) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| responsespan.log({ | ||
| 'event': 'target_end' | ||
| }); | ||
| responsespan.setTag(Tags.HTTP_STATUS_CODE, statusCode); | ||
| responsespan.finish(); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| startTargetSpan: function(correlation_id, targetHostname) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| targetTrace = initTracer(targetHostname); | ||
| responsespan = targetTrace.startSpan("target_start", { | ||
| childOf: requestspan.context() | ||
| }); | ||
| responsespan.setBaggageItem('correlation_id', correlation_id); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| finishRequestSpan: function() { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| requestspan.finish(); | ||
| } catch (err) {} | ||
| } | ||
| }, | ||
| setChildErrorSpan: function(name, traceheaders) { | ||
| if (process.env.EDGEMICRO_OPENTRACE) { | ||
| try { | ||
| var childtracer = initTracer(name); | ||
| var parentSpanContext = childtracer.extract(FORMAT_HTTP_HEADERS, traceheaders); | ||
| var span = childtracer.startSpan(name + '_error', { | ||
| childOf: parentSpanContext | ||
| }); | ||
| span.setTag(Tags.ERROR, true); | ||
| span.finish(); | ||
| } catch (err) {} | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function checkUberParentId(traceheaders) { | ||
| const uberHeader = 'Uber-Trace-Id'; | ||
| return traceheaders.hasOwnProperty(uberHeader.toLowerCase()) ? true : false; | ||
| } |
Oops, something went wrong.