Docker Logs Tail-Docker Logs To File-Docker Logs Tutorial

to troubleshoot or debug we need the logs of docker container. docker logs command is used to print the logs of any container. in the following steps i will show you how to find the logs of docker container and how to get or tail last N logs of a container with docker logs tail command. in the following commands i will use docker container id you can use either container id or container name.

find Docker Container Logs file Location

docker inspect --format='{{.LogPath}}' container_id

Ex:

[root@ip-10-0-0-22 ~]# docker inspect --format='{{.LogPath}}' 71b066c63371

/var/lib/docker/containers/71b066c633715472d51e4ceb0752d30cc1e35e6bf888643d7f04d22ce70914fa/71b066c633715472d51e4ceb0752d30cc1e35e6bf888643d7f04d22ce70914fa-json.log

so you can abserve from above commands that logfile of a container is located in

/var/lib/docker/containers/container_id/container_id-json.log

find the logs of docker container

docker logs container_id

it will show you all the logs of docker container

docker container logs with timestamp

docker logs container_id --timestamps

it will Show you the Docker container logs with timestamps: that means it will show you each log with at what time it generated.

find docker container logs since particular date:

docker logs container_id --since YYYY-MM-DD

 

find Docker container logs since particular time

docker logs container_id --since YYYY-MM-DDTHH:MM

Ex: find Docker logs since 1 pm:

  docker logs container_id  --since  2019-02-12T13:00

it will show you the logs of a container which are generated after 2019 feb 2 - 1pm

Tail the last N lines of logs:

with docker logs tail command we can view the last N logs of a container.

docker logs container_id --tail N

it will print last N logs of docker container.

if you want to print last 100 logs of docker container use

docker logs container_id --tail 100

follow the docker container logs (or)To see live logs

docker logs container_id --follow

use or test the feature of your container and it will sent the logs to above command so you can view the logs at a time when you are accessing the container. 

docker logs to file

all the logs of every docker container is stored in  /var/lib/docker/containers/container_id/container_id-json.log

if you want to copy the docker  logs to file or docker logs to stdout use below command.

docker logs to stdout

docker logs container > /tmp/stdout.log

docker logs stderr

by using below command you can copy the docker container logs stderr to any file

docker logs container 2> /tmp/stdout.log

 

 

• docker logs location
• docker logs tail  
• docker logs to file 
• docker logs clear 
• docker logs stderr 
• docker logs to stdout