How PodLogs.streamNamespacedPodLog works

[Ethan7290]

Hi Brendan,
I want to collect podlogs, my code like below

V1Pod pod = api.readNamespacedPod("xxx-6d7758ddb7-qnrh4", "oo", null, null, null);
InputStream is = logs.streamNamespacedPodLog(pod);
ByteStreams.copy(is, System.out);

but my console can't print any logs, please tell me how can i get it, thank u.

--> GET https://xxxxxx:8443/api/v1/namespaces/oo/pods/xxx-6d7758ddb7-qnrh4/log?container=kia&follow=true&pretty=false&previous=false&timestamps=false HTTP/1.1
authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLWI2aDV2Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJmZWVmYjQ1Mi02OTg3LTExZTktYTJmMS1mYTczOTRlZmZmMDAiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.MiNuKg3sWrjZPLvPqa9Q3gQkkXiRXgLELELbc1PAE4nvTuoankBz5ptmSzO7Iy0o5NDp8-DcSbylmqOxMhXxt_h0YtqMn0xw7kpk_l52h2jjMrfDUgcHNrhWS22B4yeK9Tpc2GvcSPpLJ4Ai41mQ2iFtBaG03UGgecgvoujiWNpWPGMewgct5Zzh5I54dyneSBtH7o_2L0vIK6NbpaUTr98_z8f4kY_IAMV2IYT6-Jb75h_TV4WkAkFvFWSYqOXyukZMWFguZdI6-Qc92yGYQoqg-MVgns6w7yH3ZnnPLOf6B21sIm5y6mfv72W5P7s5_oVR933vVAP96cII7jYY6g
Accept: application/json
User-Agent: Swagger-Codegen/1.0-SNAPSHOT/java
--> END GET
<-- HTTP/1.1 200 OK (23ms)
Content-Type: text/plain
Date: Thu, 23 May 2019 09:16:16 GMT
Transfer-Encoding: chunked
OkHttp-Sent-Millis: 1558602976683
OkHttp-Received-Millis: 1558602976707
@brendandburns

[Ethan7290]

client-java version:4.0.0
kubernets version:1.13

[Ethan7290]

i set follow as ture in method readNamespacedPodLog, so i hope i could get podlogs as io stream that i can push sokcet message to front-end web.
is my idea right?

[yue9944882]

/triage support

[Ethan7290]

hello?

[brendandburns]

I don't think your pods are logging anything. Does kubectl logs <pod-name> print anything?

[Ethan7290]

I don't think your pods are logging anything. Does kubectl logs <pod-name> print anything?

kubectl logs <pod-name> -n <namespace> can print logs, does LogsExample work fine? when i use it,it can't print anything.

[brendandburns]

It worked the last time I tested it.... I will try to validate it again.

[dj13may91]

Hi @JasonCL2015 @brendanburns
Can you post a code which works ? i am trying the same thing. Setting follow= true returns string which still is not a stream.

I am trying below approach but its just a hack to get last 1 second logs and push them to my web socket

while (flag) { try { logLine = client.getApi().readNamespacedPodLog(pod.getPodName(), pod.getNamespace(), null, null,null, null, null, 1, null, true); // 1 = sinceSeconds parameter } catch (ApiException e) { e.printStackTrace(); } if (StringUtils.isNotBlank(logLine)) { this.template.convertAndSend(topic, logLine); } try { Thread.sleep(950); } catch (InterruptedException e) { e.printStackTrace(); }

But this does not give correct logs with 100 % accuracy

[dj13may91]

It worked the last time I tested it.... I will try to validate it again.

@brendandburns can you please help me out over the same ?

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