Estimated reading time: 3 minutes
Fetch the logs of a container
$ docker logs [OPTIONS] CONTAINER
docker logs command batch-retrieves logs present at the time of execution.
This command is only functional for containers that are started with the
For more information about selecting and configuring logging drivers, refer to Configure logging drivers.
docker logs --follow command will continue streaming the new output from
Passing a negative number or a non-integer to
--tail is invalid and the
value is set to
all in that case.
docker logs --timestamps command will add an RFC3339Nano timestamp
, for example
2014-09-16T06:17:46.000000000Z, to each
log entry. To ensure that the timestamps are aligned the
nano-second part of the timestamp will be padded with zero when necessary.
docker logs --details command will add on extra attributes, such as
environment variables and labels, provided to
--log-opt when creating the
--since option shows only the container logs generated after
a given date. You can specify the date as an RFC 3339 date, a UNIX
timestamp, or a Go duration string (e.g.
3h). Besides RFC3339 date
format you may also use RFC3339Nano,
2006-01-02. The local
timezone on the client will be used if you do not provide either a
Z or a
+-00:00 timezone offset at the end of the timestamp. When providing Unix
timestamps enter seconds[.nanoseconds], where seconds is the number of seconds
that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap
seconds (aka Unix epoch or Unix time), and the optional .nanoseconds field is a
fraction of a second no more than nine digits long. You can combine the
--since option with either or both of the
For example uses of this command, refer to the examples section below.
||Show extra details provided to logs|
||Follow log output|
||Show logs since timestamp (e.g. 2013-01-02T13:23:37Z) or relative (e.g. 42m for 42 minutes)|
||Number of lines to show from the end of the logs|
||Show logs before a timestamp (e.g. 2013-01-02T13:23:37Z) or relative (e.g. 42m for 42 minutes)|
Retrieve logs until a specific point in time
In order to retrieve logs before a specific point in time, run:
$ docker run --name test -d busybox sh -c "while true; do $(echo date); sleep 1; done" $ date Tue 14 Nov 2017 16:40:00 CET $ docker logs -f --until=2s test Tue 14 Nov 2017 16:40:00 CET Tue 14 Nov 2017 16:40:01 CET Tue 14 Nov 2017 16:40:02 CET