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moby--moby/docs/reference/commandline/create.md

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<!--[metadata]>
+++
title = "create"
description = "The create command description and usage"
keywords = ["docker, create, container"]
[menu.main]
parent = "smn_cli"
+++
<![end-metadata]-->
# create
Creates a new container.
Usage: docker create [OPTIONS] IMAGE [COMMAND] [ARG...]
Create a new container
-a, --attach=[] Attach to STDIN, STDOUT or STDERR
--add-host=[] Add a custom host-to-IP mapping (host:ip)
--blkio-weight=0 Block IO weight (relative weight)
--blkio-weight-device=[] Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`)
--cpu-shares=0 CPU shares (relative weight)
--cap-add=[] Add Linux capabilities
--cap-drop=[] Drop Linux capabilities
--cgroup-parent="" Optional parent cgroup for the container
--cidfile="" Write the container ID to the file
--cpu-period=0 Limit CPU CFS (Completely Fair Scheduler) period
--cpu-quota=0 Limit CPU CFS (Completely Fair Scheduler) quota
--cpuset-cpus="" CPUs in which to allow execution (0-3, 0,1)
--cpuset-mems="" Memory nodes (MEMs) in which to allow execution (0-3, 0,1)
--device=[] Add a host device to the container
--device-read-bps=[] Limit read rate (bytes per second) from a device (e.g., --device-read-bps=/dev/sda:1mb)
--device-read-iops=[] Limit read rate (IO per second) from a device (e.g., --device-read-iops=/dev/sda:1000)
--device-write-bps=[] Limit write rate (bytes per second) to a device (e.g., --device-write-bps=/dev/sda:1mb)
--device-write-iops=[] Limit write rate (IO per second) to a device (e.g., --device-write-iops=/dev/sda:1000)
--disable-content-trust=true Skip image verification
--dns=[] Set custom DNS servers
--dns-opt=[] Set custom DNS options
--dns-search=[] Set custom DNS search domains
-e, --env=[] Set environment variables
--entrypoint="" Overwrite the default ENTRYPOINT of the image
--env-file=[] Read in a file of environment variables
--expose=[] Expose a port or a range of ports
--group-add=[] Add additional groups to join
-h, --hostname="" Container host name
--help Print usage
-i, --interactive Keep STDIN open even if not attached
--ip="" Container IPv4 address (e.g. 172.30.100.104)
--ip6="" Container IPv6 address (e.g. 2001:db8::33)
--ipc="" IPC namespace to use
--isolation="" Container isolation technology
--kernel-memory="" Kernel memory limit
-l, --label=[] Set metadata on the container (e.g., --label=com.example.key=value)
--label-file=[] Read in a line delimited file of labels
--link=[] Add link to another container
--log-driver="" Logging driver for container
--log-opt=[] Log driver specific options
-m, --memory="" Memory limit
--mac-address="" Container MAC address (e.g. 92:d0:c6:0a:29:33)
--memory-reservation="" Memory soft limit
--memory-swap="" A positive integer equal to memory plus swap. Specify -1 to enable unlimited swap.
--memory-swappiness="" Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
--name="" Assign a name to the container
--net="bridge" Connect a container to a network
'bridge': create a network stack on the default Docker bridge
'none': no networking
'container:<name|id>': reuse another container's network stack
'host': use the Docker host network stack
'<network-name>|<network-id>': connect to a user-defined network
--net-alias=[] Add network-scoped alias for the container
--oom-kill-disable Whether to disable OOM Killer for the container or not
--oom-score-adj=0 Tune the host's OOM preferences for containers (accepts -1000 to 1000)
-P, --publish-all Publish all exposed ports to random ports
-p, --publish=[] Publish a container's port(s) to the host
--pid="" PID namespace to use
--privileged Give extended privileges to this container
--read-only Mount the container's root filesystem as read only
--restart="no" Restart policy (no, on-failure[:max-retry], always, unless-stopped)
--security-opt=[] Security options
--stop-signal="SIGTERM" Signal to stop a container
--shm-size=[] Size of `/dev/shm`. The format is `<number><unit>`. `number` must be greater than `0`. Unit is optional and can be `b` (bytes), `k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you omit the unit, the system uses bytes. If you omit the size entirely, the system uses `64m`.
-t, --tty Allocate a pseudo-TTY
-u, --user="" Username or UID
--ulimit=[] Ulimit options
--uts="" UTS namespace to use
-v, --volume=[host-src:]container-dest[:<options>]
Bind mount a volume. The comma-delimited
`options` are [rw|ro], [z|Z], or
[[r]shared|[r]slave|[r]private]. The
'host-src' is an absolute path or a name
value.
--volume-driver="" Container's volume driver
--volumes-from=[] Mount volumes from the specified container(s)
-w, --workdir="" Working directory inside the container
The `docker create` command creates a writeable container layer over the
specified image and prepares it for running the specified command. The
container ID is then printed to `STDOUT`. This is similar to `docker run -d`
except the container is never started. You can then use the
`docker start <container_id>` command to start the container at any point.
This is useful when you want to set up a container configuration ahead of time
so that it is ready to start when you need it. The initial status of the
new container is `created`.
Please see the [run command](run.md) section and the [Docker run reference](../run.md) for more details.
## Examples
$ docker create -t -i fedora bash
6d8af538ec541dd581ebc2a24153a28329acb5268abe5ef868c1f1a261221752
$ docker start -a -i 6d8af538ec5
bash-4.2#
As of v1.4.0 container volumes are initialized during the `docker create` phase
(i.e., `docker run` too). For example, this allows you to `create` the `data`
volume container, and then use it from another container:
$ docker create -v /data --name data ubuntu
240633dfbb98128fa77473d3d9018f6123b99c454b3251427ae190a7d951ad57
$ docker run --rm --volumes-from data ubuntu ls -la /data
total 8
drwxr-xr-x 2 root root 4096 Dec 5 04:10 .
drwxr-xr-x 48 root root 4096 Dec 5 04:11 ..
Similarly, `create` a host directory bind mounted volume container, which can
then be used from the subsequent container:
$ docker create -v /home/docker:/docker --name docker ubuntu
9aa88c08f319cd1e4515c3c46b0de7cc9aa75e878357b1e96f91e2c773029f03
$ docker run --rm --volumes-from docker ubuntu ls -la /docker
total 20
drwxr-sr-x 5 1000 staff 180 Dec 5 04:00 .
drwxr-xr-x 48 root root 4096 Dec 5 04:13 ..
-rw-rw-r-- 1 1000 staff 3833 Dec 5 04:01 .ash_history
-rw-r--r-- 1 1000 staff 446 Nov 28 11:51 .ashrc
-rw-r--r-- 1 1000 staff 25 Dec 5 04:00 .gitconfig
drwxr-sr-x 3 1000 staff 60 Dec 1 03:28 .local
-rw-r--r-- 1 1000 staff 920 Nov 28 11:51 .profile
drwx--S--- 2 1000 staff 460 Dec 5 00:51 .ssh
drwxr-xr-x 32 1000 staff 1140 Dec 5 04:01 docker
### Specify isolation technology for container (--isolation)
This option is useful in situations where you are running Docker containers on
Windows. The `--isolation=<value>` option sets a container's isolation
technology. On Linux, the only supported is the `default` option which uses
Linux namespaces. On Microsoft Windows, you can specify these values:
| Value | Description |
|-----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `default` | Use the value specified by the Docker daemon's `--exec-opt` . If the `daemon` does not specify an isolation technology, Microsoft Windows uses `process` as its default value. |
| `process` | Namespace isolation only. |
| `hyperv` | Hyper-V hypervisor partition-based isolation. |
Specifying the `--isolation` flag without a value is the same as setting `--isolation="default"`.