Man page - docker-container-logs(1)

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Manual

DOCKER

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO

NAME

docker-container-logs - Fetch the logs of a container

SYNOPSIS

docker container logs [OPTIONS] CONTAINER

DESCRIPTION

The docker container logs command batch-retrieves whatever logs are present for a container at the time of execution. This does not guarantee execution order when combined with a docker run (i.e., your run may not have generated any logs at the time you execute docker container logs).

The docker container logs --follow command combines commands docker container logs and docker attach . It will first return all logs from the beginning and then continue streaming new output from the container’s stdout and stderr.

Warning : This command works only for the json-file or journald logging drivers.

The --since and --until options can be Unix timestamps, date formatted timestamps, or Go duration strings supported by ParseDuration ⟨ https://pkg.go.dev/time#ParseDuration⟩ (e.g. 10m , 1h30m ) computed relative to the client machine’s time. Supported formats for date formatted time stamps include RFC3339Nano, RFC3339, 2006-01-02T15:04:05 , 2006-01-02T15:04:05.999999999 , 2006-01-02T07:00 , and 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 or --until options with either or both of the --follow or --tail options.

The docker container logs --details command will add on extra attributes, such as environment variables and labels, provided to --log-opt when creating the container.

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

OPTIONS

		--details [=false]	Show extra details provided to logs
		-f , --follow [=false]	Follow log output
		--since =""	Show logs since timestamp (e.g. "2013-01-02T13:23:37Z") or relative (e.g. "42m" for 42 minutes)
		-n , --tail ="all"	Number of lines to show from the end of the logs
		-t , --timestamps [=false]	Show timestamps
		--until =""	Show logs before a timestamp (e.g. "2013-01-02T13:23:37Z") or relative (e.g. "42m" for 42 minutes)