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Docker is a containerization platform that allows you to quickly build, test, and deploy applications as portable, self-sufficient containers that can run virtually anywhere. It is the de-facto standard for container deployment, and it is an essential tool for DevOps engineers and their continuous integration and delivery pipeline.
In this article, we’ll explain how to list Docker containers.
List Docker Containers #
The Docker command for listing containers takes the following form:
docker container ls [options]
Older Docker versions before 1.13 are using a different command to list the containers:
docker ps [options]
The command above is still supported in newer Docker versions where the ps
command is an alias to container ls
.
To list the running containers, execute the docker container ls
command without any option:
docker container ls
The output will look something like this:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c8bded53da86 postgres "docker-entrypoint.s…" 2 hours ago Up 2 hours 5432/tcp pg
571c3a115fcf redis "docker-entrypoint.s…" 4 hours ago Up 4 hours 6379/tcp cache
05ef6d8680ba nginx "nginx -g 'daemon of…" 2 hours ago Up 2 hours 80/tcp web
Each line of the output includes the following columns:
Container ID
– A unique alphanumeric string that identifies each container.Image
– The Docker image that is used to create the container.Command
– The command that is executed when starting the container.Created
– The creation time of the container.Status
– The status of the container.Ports
– The container’s published ports.Name
– The name of the container.
If there are no running containers, only the header line is displayed.
The -a
, --all
option tells docker container ls
to print a list of all containers:
docker container ls -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b28cbaa91f15 couchbase "/entrypoint.sh couc…" 5 hours ago Exited (0) 3 hours ago db
c8bded53da86 postgres "docker-entrypoint.s…" 2 hours ago Up 2 hours 5432/tcp pg
571c3a115fcf redis "docker-entrypoint.s…" 4 hours ago Up 4 hours 6379/tcp cache
05ef6d8680ba nginx "nginx -g 'daemon of…" 2 hours ago Up 2 hours 80/tcp web
By default, columns with a length exceeding a specified limit are truncated. Use the --no-trunc
option to disable truncation:
docker container ls --no-trunc
To only display the containers’ IDs pass the -q
, --quiet
option:
docker container ls -q
c8bded53da86
571c3a115fcf
05ef6d8680ba
The --format
allows you to format the output using a Go template. For example, to print only the containers’ names and status, including the header, you would run:
docker container ls --format 'table {{.Names}}t{{.Status}}'
NAMES STATUS
pg Up 2 hours
cache Up 4 hours
web Up 2 hours
Use the -s
, --size
option to view the size of the containers:
docker container ls -s
Each line will include a column named SIZE
that shows the container size:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES SIZE
c8bded53da86 postgres "docker-entrypoint.s…" 2 hours ago Up 2 hours 5432/tcp pg 63B (virtual 394MB)
571c3a115fcf redis "docker-entrypoint.s…" 4 hours ago Up 4 hours 6379/tcp cache 0B (virtual 98.2MB)
05ef6d8680ba nginx "nginx -g 'daemon of…" 2 hours ago Up 2 hours 80/tcp web 2B (virtual 126MB)
The --last
, -n
option tells the command to display n
last created containers, including all states. For example, to view the latest two created containers, you would run:
docker container ls -n 2
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b28cbaa91f15 couchbase "/entrypoint.sh couc…" 5 hours ago Exited (0) 3 hours ago db
c8bded53da86 postgres "docker-entrypoint.s…" 2 hours ago Up 2 hours 5432/tcp pg
There is also an option to list only the latest created container --latest
, -l
which is same as -n 1
:
docker container ls -l
The --filter
, -f
option allows you to filter the output based on certain criteria.
For example, to view only the containers with status exited
, you would run:
docker container ls -f "status=exited"
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b28cbaa91f15 couchbase "/entrypoint.sh couc…" 5 hours ago Exited (0) 3 hours ago db
For a list of all supported filters, check the Docker documentation
Conclusion #
A Docker container is a standalone runtime instance of an image. To list Docker containers, use the docker container ls
command or its alias docker ps
.
If you have any questions, please leave a comment below.
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