plugin/trace: Fix zipkin json_v2 and #4160 #4180
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| @@ -47,6 +47,8 @@ You can run Zipkin on a Docker host like this: | |||
| docker run -d -p 9411:9411 openzipkin/zipkin | |||
| ``` | |||
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| :warning: The zipkin provider does not support the v1 API since coredns 1.7.1 | |||
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is this useful information for the reader or can we just not mention it?
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This is a "breaking" change compared to pre-1.7.1
I don't mind removing the note, I made it in response to this comment
| @@ -35,7 +35,9 @@ func traceParse(c *caddy.Controller) (*trace, error) { | |||
| ) | |||
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| cfg := dnsserver.GetConfig(c) | |||
| tr.serviceEndpoint = cfg.ListenHosts[0] + ":" + cfg.Port | |||
| if cfg.ListenHosts[0] != "" { | |||
| tr.serviceEndpoint = cfg.ListenHosts[0] + ":" + cfg.Port | |||
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should we not add the port here? As you say in the description this doesn't work with zipkin...
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Zipkin does understand the port when associated with a resolvable hostname / an IP, and there is always a port in the config.
I assume to track the the correct listener you need the right couple of bind + port
That would also work with no port but would be less precise
plugin/trace/setup_test.go
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| every uint64 | ||
| serviceName string | ||
| clientServer bool | ||
| serviceEndpoint string |
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serviceEndpoint is empty in all tests? In general if you want to test a little new thing, just add a small new test.
Codecov Report
@@ Coverage Diff @@
## master #4180 +/- ##
==========================================
- Coverage 55.99% 55.94% -0.05%
==========================================
Files 225 225
Lines 9930 9943 +13
==========================================
+ Hits 5560 5563 +3
- Misses 3905 3912 +7
- Partials 465 468 +3
Continue to review full report at Codecov.
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@nyodas can you resolve conflicts please? |
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Done. |
In coredns#4171 i noticed that the client_server was not being used anymore. It appears that it should still be there. While testing that change i noticed that the zipkin provider was borked and couldn't push traces anymore Tcpdump showed that the zipkin server was responding with ``` Expected a JSON_V1 encoded list, but received: JSON_V2 ``` There was also an issue (coredns#4160) with ``` recorder, err := zipkin.NewEndpoint(t.serviceName, t.serviceEndpoint) ``` As `t.serviceEndpoint` is `:53` in most cases Zipkin can't parse the ip:port tuple and send a warning with ``` [WARNING] build Zipkin endpoint found err: lookup : no such host ``` cf: [openzipkin/endpoint.go](https://github.com/openzipkin/zipkin-go/blob/master/endpoint.go#L27-L80) To actively set a correct values in serviceEnpoint you need to use the bind plugin ``` .:53 { bind 127.0.0.1 trace } ``` Signed-off-by: bob <bob.bouteillier@datadoghq.com>
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Codecov Report
@@ Coverage Diff @@
## master #4180 +/- ##
==========================================
- Coverage 56.05% 56.04% -0.01%
==========================================
Files 223 223
Lines 9850 9852 +2
==========================================
+ Hits 5521 5522 +1
Misses 3867 3867
- Partials 462 463 +1
Continue to review full report at Codecov.
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@nyodas The |
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Thanks! /lgtm |
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1. Why is this pull request needed and what does it do?
In #4171 i noticed that the client_server was not being used anymore.
It appears that it should still be there.
While testing that change i noticed that the zipkin provider was borked and couldn't push traces anymore
Tcpdump showed that the zipkin server was responding with
There was also an issue (#4160) with
As
t.serviceEndpointis:53in most casesZipkin can't parse the ip:port tuple and send a warning with
cf: openzipkin/endpoint.go
To actively set a correct values in serviceEndpoint you need to use the bind plugin
2. Which issues (if any) are related?
#4160
#4109
#4171
3. Which documentation changes (if any) need to be made?
Indicate that the zipkin api v1 is not working as of
1.7.14. Does this introduce a backward incompatible change or deprecation?
Yes the api version of zipkin is now using
v2Though that fix a bug introduced with #4109