<!--[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 --pids-limit=-1 Tune container pids limit (set -1 for unlimited), kernel >= 4.3 --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) --runtime="" Name of the runtime to be used for that container --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`. --storage-opt=[] Set storage driver options per container --sysctl[=*[]*]] Configure namespaced kernel parameters at runtime -t, --tty Allocate a pseudo-TTY -u, --user="" Username or UID --userns="" Container user namespace 'host': Use the Docker host user namespace '': Use the Docker daemon user namespace specified by `--userns-remap` option. --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], [[r]shared|[r]slave|[r]private], and [nocopy]. 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 Set storage driver options per container. $ docker create -it --storage-opt size=120G fedora /bin/bash This (size) will allow to set the container rootfs size to 120G at creation time. User cannot pass a size less than the Default BaseFS Size. ### 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 if the daemon is running on Windows server, or `hyperv` if running on Windows client. | | `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"`.