Update opentracing configuration

[aledbf]

Which issue this PR fixes: fixes #2222

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [aledbf]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[rnburn]

@aledbf - for propagating the context, now, you have to use the opentracing_propagate_context directive.

It implements this suggestion from nginx-devel.

[aledbf]

@rnburn added. Do you have any other suggestion?
Thanks for watching this PR

[rnburn]

I think support for embedded configurations where the the tracer's configuration is passed through the ingress configuration would be a good idea, since then you can support all the options without requiring code for each one.

But that's something I can follow up with in a later PR.

[codecov-io]

Codecov Report

Merging #2676 into master will decrease coverage by 0.05%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #2676      +/-   ##
==========================================
- Coverage   40.93%   40.88%   -0.06%     
==========================================
  Files          72       72              
  Lines        5088     5085       -3     
==========================================
- Hits         2083     2079       -4     
- Misses       2721     2723       +2     
+ Partials      284      283       -1

Impacted Files	Coverage Δ
internal/ingress/controller/template/template.go	66.52% <0%> (+2.58%)	⬆️
internal/ingress/controller/nginx.go	10.93% <0%> (-0.58%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1841815...50b5652. Read the comment docs.