Kubernetes log viewer - kubetail

1 problem

Suppose there is one in the cluster deployment, Replications for 3, You need to check Pod Log time ,kubectl default log The command does not support multi container log viewing .

2 kubetail Introduce

Kubetail It's a Bash Script , The function is similar to kubectl -f logs pod-name, But here's the difference , He speaks to multiple people at the same time Pod Work , And merge the logs into one stream .

3 install

MacOS

brew tap johanhaleby/kubetail && brew install kubetail 

4 Use

Kubetail It's also very simple to use , The basic grammar is as follows ：

kubetail <search term> [-h] [-c] [-n] [-t] [-l] [-d] [-p] [-s] [-b] [-k] [-v] [-r] [-i] -- tail multiple Kubernetes pod logs at the same time

4.1 Parameter interpretation

-c： Specify multiple containers  Pod  Container name in   
-t： Appoint  Kubeconfig  In the document  Context  
-l： Tag filter , Use  -l  After the parameters , Will ignore  Pod  name   
-n： Specify the namespace   
-s： Specifies to return the log after a relative time , for example  5s,2m  perhaps  3h, The default is  10s  
-b： Whether to use  line-buffered, Default is  false  
-k： Specify the specific shaded part of the output content ,pod： Only to  pod  Color the name ,line： Color the whole line （ default ）,false： No coloring  

4.2 Examples of use

$ kubetail my-pod-v1  
$ kubetail my-pod-v1 -c my-container  
$ kubetail my-pod-v1 -t int1-context -c my-container  
$ kubetail '(service|consumer|thing)' -e regex  
$ kubetail -l service=my-service  
$ kubetail --selector service=my-service --since 10m  
$ kubetail --tail 1