command: docker create short: Create a new container long: |- 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 ` 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. usage: docker create [OPTIONS] IMAGE [COMMAND] [ARG...] pname: docker plink: docker.yaml options: - option: add-host value_type: list description: Add a custom host-to-IP mapping (host:ip) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: attach shorthand: a value_type: list description: Attach to STDIN, STDOUT or STDERR deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: blkio-weight value_type: uint16 default_value: "0" description: | Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: blkio-weight-device value_type: list default_value: '[]' description: Block IO weight (relative device weight) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cap-add value_type: list description: Add Linux capabilities deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cap-drop value_type: list description: Drop Linux capabilities deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cgroup-parent value_type: string description: Optional parent cgroup for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cidfile value_type: string description: Write the container ID to the file deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpu-count value_type: int64 default_value: "0" description: CPU count (Windows only) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false os_type: windows - option: cpu-percent value_type: int64 default_value: "0" description: CPU percent (Windows only) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false os_type: windows - option: cpu-period value_type: int64 default_value: "0" description: Limit CPU CFS (Completely Fair Scheduler) period deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpu-quota value_type: int64 default_value: "0" description: Limit CPU CFS (Completely Fair Scheduler) quota deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpu-rt-period value_type: int64 default_value: "0" description: Limit CPU real-time period in microseconds deprecated: false min_api_version: "1.25" experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpu-rt-runtime value_type: int64 default_value: "0" description: Limit CPU real-time runtime in microseconds deprecated: false min_api_version: "1.25" experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpu-shares shorthand: c value_type: int64 default_value: "0" description: CPU shares (relative weight) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpus value_type: decimal description: Number of CPUs deprecated: false min_api_version: "1.25" experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpuset-cpus value_type: string description: CPUs in which to allow execution (0-3, 0,1) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: cpuset-mems value_type: string description: MEMs in which to allow execution (0-3, 0,1) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device value_type: list description: Add a host device to the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device-cgroup-rule value_type: list description: Add a rule to the cgroup allowed devices list deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device-read-bps value_type: list default_value: '[]' description: Limit read rate (bytes per second) from a device deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device-read-iops value_type: list default_value: '[]' description: Limit read rate (IO per second) from a device deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device-write-bps value_type: list default_value: '[]' description: Limit write rate (bytes per second) to a device deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: device-write-iops value_type: list default_value: '[]' description: Limit write rate (IO per second) to a device deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: disable-content-trust value_type: bool default_value: "true" description: Skip image verification deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: dns value_type: list description: Set custom DNS servers deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: dns-opt value_type: list description: Set DNS options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: dns-option value_type: list description: Set DNS options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: dns-search value_type: list description: Set custom DNS search domains deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: entrypoint value_type: string description: Overwrite the default ENTRYPOINT of the image deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: env shorthand: e value_type: list description: Set environment variables deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: env-file value_type: list description: Read in a file of environment variables deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: expose value_type: list description: Expose a port or a range of ports deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: group-add value_type: list description: Add additional groups to join deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: health-cmd value_type: string description: Command to run to check health deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: health-interval value_type: duration default_value: 0s description: Time between running the check (ms|s|m|h) (default 0s) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: health-retries value_type: int default_value: "0" description: Consecutive failures needed to report unhealthy deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: health-start-period value_type: duration default_value: 0s description: | Start period for the container to initialize before starting health-retries countdown (ms|s|m|h) (default 0s) deprecated: false min_api_version: "1.29" experimental: false experimentalcli: false kubernetes: false swarm: false - option: health-timeout value_type: duration default_value: 0s description: | Maximum time to allow one check to run (ms|s|m|h) (default 0s) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: help value_type: bool default_value: "false" description: Print usage deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: hostname shorthand: h value_type: string description: Container host name deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: init value_type: bool default_value: "false" description: | Run an init inside the container that forwards signals and reaps processes deprecated: false min_api_version: "1.25" experimental: false experimentalcli: false kubernetes: false swarm: false - option: interactive shorthand: i value_type: bool default_value: "false" description: Keep STDIN open even if not attached deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: io-maxbandwidth value_type: bytes default_value: "0" description: | Maximum IO bandwidth limit for the system drive (Windows only) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false os_type: windows - option: io-maxiops value_type: uint64 default_value: "0" description: Maximum IOps limit for the system drive (Windows only) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false os_type: windows - option: ip value_type: string description: IPv4 address (e.g., 172.30.100.104) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: ip6 value_type: string description: IPv6 address (e.g., 2001:db8::33) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: ipc value_type: string description: IPC mode to use deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: isolation value_type: string description: Container isolation technology deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: kernel-memory value_type: bytes default_value: "0" description: Kernel memory limit deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: label shorthand: l value_type: list description: Set meta data on a container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: label-file value_type: list description: Read in a line delimited file of labels deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: link value_type: list description: Add link to another container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: link-local-ip value_type: list description: Container IPv4/IPv6 link-local addresses deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: log-driver value_type: string description: Logging driver for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: log-opt value_type: list description: Log driver options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: mac-address value_type: string description: Container MAC address (e.g., 92:d0:c6:0a:29:33) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: memory shorthand: m value_type: bytes default_value: "0" description: Memory limit deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: memory-reservation value_type: bytes default_value: "0" description: Memory soft limit deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: memory-swap value_type: bytes default_value: "0" description: | Swap limit equal to memory plus swap: '-1' to enable unlimited swap deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: memory-swappiness value_type: int64 default_value: "-1" description: Tune container memory swappiness (0 to 100) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: mount value_type: mount description: Attach a filesystem mount to the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: name value_type: string description: Assign a name to the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: net value_type: string default_value: default description: Connect a container to a network deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: net-alias value_type: list description: Add network-scoped alias for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: network value_type: string default_value: default description: Connect a container to a network deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: network-alias value_type: list description: Add network-scoped alias for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: no-healthcheck value_type: bool default_value: "false" description: Disable any container-specified HEALTHCHECK deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: oom-kill-disable value_type: bool default_value: "false" description: Disable OOM Killer deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: oom-score-adj value_type: int default_value: "0" description: Tune host's OOM preferences (-1000 to 1000) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: pid value_type: string description: PID namespace to use deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: pids-limit value_type: int64 default_value: "0" description: Tune container pids limit (set -1 for unlimited) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: platform value_type: string description: Set platform if server is multi-platform capable deprecated: false min_api_version: "1.32" experimental: true experimentalcli: false kubernetes: false swarm: false - option: privileged value_type: bool default_value: "false" description: Give extended privileges to this container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: publish shorthand: p value_type: list description: Publish a container's port(s) to the host deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: publish-all shorthand: P value_type: bool default_value: "false" description: Publish all exposed ports to random ports deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: read-only value_type: bool default_value: "false" description: Mount the container's root filesystem as read only deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: restart value_type: string default_value: "no" description: Restart policy to apply when a container exits deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: rm value_type: bool default_value: "false" description: Automatically remove the container when it exits deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: runtime value_type: string description: Runtime to use for this container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: security-opt value_type: list description: Security Options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: shm-size value_type: bytes default_value: "0" description: Size of /dev/shm deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: stop-signal value_type: string default_value: SIGTERM description: Signal to stop a container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: stop-timeout value_type: int default_value: "0" description: Timeout (in seconds) to stop a container deprecated: false min_api_version: "1.25" experimental: false experimentalcli: false kubernetes: false swarm: false - option: storage-opt value_type: list description: Storage driver options for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: sysctl value_type: map default_value: map[] description: Sysctl options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: tmpfs value_type: list description: Mount a tmpfs directory deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: tty shorthand: t value_type: bool default_value: "false" description: Allocate a pseudo-TTY deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: ulimit value_type: ulimit default_value: '[]' description: Ulimit options deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: user shorthand: u value_type: string description: 'Username or UID (format: [:])' deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: userns value_type: string description: User namespace to use deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: uts value_type: string description: UTS namespace to use deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: volume shorthand: v value_type: list description: Bind mount a volume deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: volume-driver value_type: string description: Optional volume driver for the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: volumes-from value_type: list description: Mount volumes from the specified container(s) deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false - option: workdir shorthand: w value_type: string description: Working directory inside the container deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false examples: |- ### Create and start a container ```bash $ docker create -t -i fedora bash 6d8af538ec541dd581ebc2a24153a28329acb5268abe5ef868c1f1a261221752 $ docker start -a -i 6d8af538ec5 bash-4.2# ``` ### Initialize volumes 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: ```bash $ 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: ```bash $ 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. ```bash $ 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. This option is only available for the `devicemapper`, `btrfs`, `overlay2`, `windowsfilter` and `zfs` graph drivers. For the `devicemapper`, `btrfs`, `windowsfilter` and `zfs` graph drivers, user cannot pass a size less than the Default BaseFS Size. For the `overlay2` storage driver, the size option is only available if the backing fs is `xfs` and mounted with the `pquota` mount option. Under these conditions, user can pass any size less than the backing fs size. ### Specify isolation technology for container (--isolation) This option is useful in situations where you are running Docker containers on Windows. The `--isolation=` 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"`. ### Dealing with dynamically created devices (--device-cgroup-rule) Devices available to a container are assigned at creation time. The assigned devices will both be added to the cgroup.allow file and created into the container once it is run. This poses a problem when a new device needs to be added to running container. One of the solution is to add a more permissive rule to a container allowing it access to a wider range of devices. For example, supposing our container needs access to a character device with major `42` and any number of minor number (added as new devices appear), the following rule would be added: ``` docker create --device-cgroup-rule='c 42:* rmw' -name my-container my-image ``` Then, a user could ask `udev` to execute a script that would `docker exec my-container mknod newDevX c 42 ` the required device when it is added. NOTE: initially present devices still need to be explicitly added to the create/run command deprecated: false experimental: false experimentalcli: false kubernetes: false swarm: false