3.2.16. kubectl logs¶

说明:

打印pod下container日志，如果pod只有唯一container，container值可以省略
每天or每10MB日志文件被轮替，kubectl logs仅显示最后一次轮替后的日志条目

Usage:

简写: logs, log
kubectl logs [-f] [-p] (POD | TYPE/NAME) [-c CONTAINER] [options]

实例:

# 查看指定pod下的日志(pod下只有一个cotainer)
kubectl logs <podName>

// -c, --container=''
# 查看指定pod下指定container的日志
kubectl logs -c <containerName> <podName>

实例:

$> kubectl logs mypod --previous   # 获取崩溃容器的应用日志（即前一容器的日志）

example:

// --all-containers=false
# Return snapshot logs from pod nginx with multi containers
kubectl logs nginx --all-containers=true

// -l, --selector=''
# Return snapshot logs from all containers in pods defined by label app=nginx
kubectl logs -lapp=nginx --all-containers=true

// -p, --previous=false
# Return snapshot of previous terminated ruby container logs from pod web-1
kubectl logs -p -c ruby web-1

// -f, --follow=false
# Begin streaming the logs of the ruby container in pod web-1
kubectl logs -f -c ruby web-1

// --tail=-1
# Display only the most recent 20 lines of output in pod nginx
kubectl logs --tail=20 nginx

// --since-time=''
# Show all logs from pod nginx written in the last hour
kubectl logs --since=1h nginx

# Return snapshot logs from first container of a job named hello
kubectl logs job/hello

# Return snapshot logs from container nginx-1 of a deployment named nginx
kubectl logs deployment/nginx -c nginx-1