Fetch the logs of a container
$ docker logs [OPTIONS] CONTAINER
docker logs command batch-retrieves logs present at the time of execution.
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.
||Number of lines to show from the end of the logs|
||Show logs before a timestamp (e.g.
Retrieve logs until a specific point in time (--until)
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