Question

kubernetes pods日志的绝对路径是什么？当我尝试kubectl logs pod时，我可以看到pod的日志。我想知道运行pod的日志文件路径。

kubectl logs npapp-0r9jw

output: rectory /hab/pkgs/core/tomcat8/8.5.9/20170514144202/tc/webapps/ROOT has finished in 21 ms
national-parks.default(O): 22-Oct-2017 05:33:54.526 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /hab/pkgs/core/tomcat8/8.5.9/20170514144202/tc/webapps/manager
national-parks.default(O): 22-Oct-2017 05:33:54.564 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /hab/pkgs/core/tomcat8/8.5.9/20170514144202/tc/webapps/manager has finished in 38 ms
national-parks.default(O): 22-Oct-2017 05:33:54.564 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /hab/pkgs/core/tomcat8/8.5.9/20170514144202/tc/webapps/host-manager
national-parks.default(O): 22-Oct-2017 05:33:54.595 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /hab/pkgs/core/tomcat8/8.5.9/20170514144202/tc/webapps/host-manager has finished in 31 ms
national-parks.default(O): 22-Oct-2017 05:33:54.599 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler [http-nio-8080]
national-parks.default(O): 22-Oct-2017 05:33:54.613 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler [ajp-nio-8009]
national-parks.default(O): 22-Oct-2017 05:33:54.620 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 2735 ms

我在哪里可以看到绝对日志文件路径？

Answer 1

VonC的答案并非100％准确-应该为/var/log/pods/<namespace>_<pod_name>_<pod_id>/<container_name>/*.log

此外，实际日志文件的位置取决于您使用的容器运行时。 Docker将其容器日志存储在/var/lib/docker/containers。

使用Kubernetes时，您可以使用绝对日志路径/var/log/pods/<namespace>_<pod_name>_<pod_id>/<container_name>/*.log访问容器日志。这些.log文件符号链接到容器运行时存储的实际日志文件。

Answer 2

如果您查看Kubernetes sources，您会看到pkg/routes/logs.go，它将提供（默认情况下）/var/log内的文件内容（提供静态文件following this example）< / p>

func logFileHandler(req *restful.Request, resp *restful.Response) {
    logdir := "/var/log"
    actual := path.Join(logdir, req.PathParameter("logpath"))
    http.ServeFile(resp.ResponseWriter, req.Request, actual)
}

正如您在kubernetes/kubernetes issue 53022中看到的那样：

当前符号链接/var/log/containers指向/var/log/pods/pod_UID/*.logs

因此，日志的完整绝对路径是：

/var/log/pods/pod_UID/*.logs

kubernetes pods日志的绝对路径是什么？

2 个答案: