Engine API version history

Estimated reading time: 15 minutes

v1.27 API changes

Docker Engine API v1.27 documentation

  • GET /containers/(id or name)/stats now includes an online_cpus field in both precpu_stats and cpu_stats. If this field is nil then for compatibility with older daemons the length of the corresponding cpu_usage.percpu_usage array should be used.

v1.26 API changes

Docker Engine API v1.26 documentation

  • POST /plugins/(plugin name)/upgrade upgrade a plugin.

v1.25 API changes

Docker Engine API v1.25 documentation

  • The API version is now required in all API calls. Instead of just requesting, for example, the URL /containers/json, you must now request /v1.25/containers/json.
  • GET /version now returns MinAPIVersion.
  • POST /build accepts networkmode parameter to specify network used during build.
  • GET /images/(name)/json now returns OsVersion if populated
  • GET /info now returns Isolation.
  • POST /containers/create now takes AutoRemove in HostConfig, to enable auto-removal of the container on daemon side when the container’s process exits.
  • GET /containers/json and GET /containers/(id or name)/json now return "removing" as a value for the State.Status field if the container is being removed. Previously, “exited” was returned as status.
  • GET /containers/json now accepts removing as a valid value for the status filter.
  • GET /containers/json now supports filtering containers by health status.
  • DELETE /volumes/(name) now accepts a force query parameter to force removal of volumes that were already removed out of band by the volume driver plugin.
  • POST /containers/create/ and POST /containers/(name)/update now validates restart policies.
  • POST /containers/create now validates IPAMConfig in NetworkingConfig, and returns error for invalid IPv4 and IPv6 addresses (--ip and --ip6 in docker create/run).
  • POST /containers/create now takes a Mounts field in HostConfig which replaces Binds, Volumes, and Tmpfs. note: Binds, Volumes, and Tmpfs are still available and can be combined with Mounts.
  • POST /build now performs a preliminary validation of the Dockerfile before starting the build, and returns an error if the syntax is incorrect. Note that this change is unversioned and applied to all API versions.
  • POST /build accepts cachefrom parameter to specify images used for build cache.
  • GET /networks/ endpoint now correctly returns a list of all networks, instead of the default network if a trailing slash is provided, but no name or id.
  • DELETE /containers/(name) endpoint now returns an error of removal of container name is already in progress with status code of 400, when container name is in a state of removal in progress.
  • GET /containers/json now supports a is-task filter to filter containers that are tasks (part of a service in swarm mode).
  • POST /containers/create now takes StopTimeout field.
  • POST /services/create and POST /services/(id or name)/update now accept Monitor and MaxFailureRatio parameters, which control the response to failures during service updates.
  • POST /services/(id or name)/update now accepts a ForceUpdate parameter inside the TaskTemplate, which causes the service to be updated even if there are no changes which would ordinarily trigger an update.
  • POST /services/create and POST /services/(id or name)/update now return a Warnings array.
  • GET /networks/(name) now returns field Created in response to show network created time.
  • POST /containers/(id or name)/exec now accepts an Env field, which holds a list of environment variables to be set in the context of the command execution.
  • GET /volumes, GET /volumes/(name), and POST /volumes/create now return the Options field which holds the driver specific options to use for when creating the volume.
  • GET /exec/(id)/json now returns Pid, which is the system pid for the exec’d process.
  • POST /containers/prune prunes stopped containers.
  • POST /images/prune prunes unused images.
  • POST /volumes/prune prunes unused volumes.
  • POST /networks/prune prunes unused networks.
  • Every API response now includes a Docker-Experimental header specifying if experimental features are enabled (value can be true or false).
  • Every API response now includes a API-Version header specifying the default API version of the server.
  • The hostConfig option now accepts the fields CpuRealtimePeriod and CpuRtRuntime to allocate cpu runtime to rt tasks when CONFIG_RT_GROUP_SCHED is enabled in the kernel.
  • The SecurityOptions field within the GET /info response now includes userns if user namespaces are enabled in the daemon.
  • GET /nodes and GET /node/(id or name) now return Addr as part of a node’s Status, which is the address that that node connects to the manager from.
  • The HostConfig field now includes NanoCPUs that represents CPU quota in units of 10-9 CPUs.
  • GET /info now returns more structured information about security options.
  • The HostConfig field now includes CpuCount that represents the number of CPUs available for execution by the container. Windows daemon only.
  • POST /services/create and POST /services/(id or name)/update now accept the TTY parameter, which allocate a pseudo-TTY in container.
  • POST /services/create and POST /services/(id or name)/update now accept the DNSConfig parameter, which specifies DNS related configurations in resolver configuration file (resolv.conf) through Nameservers, Search, and Options.
  • GET /networks/(id or name) now includes IP and name of all peers nodes for swarm mode overlay networks.
  • GET /plugins list plugins.
  • POST /plugins/pull?name=<plugin name> pulls a plugin.
  • GET /plugins/(plugin name) inspect a plugin.
  • POST /plugins/(plugin name)/set configure a plugin.
  • POST /plugins/(plugin name)/enable enable a plugin.
  • POST /plugins/(plugin name)/disable disable a plugin.
  • POST /plugins/(plugin name)/push push a plugin.
  • POST /plugins/create?name=(plugin name) create a plugin.
  • DELETE /plugins/(plugin name) delete a plugin.
  • POST /node/(id or name)/update now accepts both id or name to identify the node to update.
  • GET /images/json now support a reference filter.
  • GET /secrets returns information on the secrets.
  • POST /secrets/create creates a secret.
  • DELETE /secrets/{id} removes the secret id.
  • GET /secrets/{id} returns information on the secret id.
  • POST /secrets/{id}/update updates the secret id.
  • POST /services/(id or name)/update now accepts service name or prefix of service id as a parameter.

v1.24 API changes

Docker Engine API v1.24 documentation

  • POST /containers/create now takes StorageOpt field.
  • GET /info now returns SecurityOptions field, showing if apparmor, seccomp, or selinux is supported.
  • GET /info no longer returns the ExecutionDriver property. This property was no longer used after integration with ContainerD in Docker 1.11.
  • GET /networks now supports filtering by label and driver.
  • GET /containers/json now supports filtering containers by network name or id.
  • POST /containers/create now takes IOMaximumBandwidth and IOMaximumIOps fields. Windows daemon only.
  • POST /containers/create now returns an HTTP 400 “bad parameter” message if no command is specified (instead of an HTTP 500 “server error”)
  • GET /images/search now takes a filters query parameter.
  • GET /events now supports a reload event that is emitted when the daemon configuration is reloaded.
  • GET /events now supports filtering by daemon name or ID.
  • GET /events now supports a detach event that is emitted on detaching from container process.
  • GET /events now supports an exec_detach event that is emitted on detaching from exec process.
  • GET /images/json now supports filters since and before.
  • POST /containers/(id or name)/start no longer accepts a HostConfig.
  • POST /images/(name)/tag no longer has a force query parameter.
  • GET /images/search now supports maximum returned search results limit.
  • POST /containers/{name:.*}/copy is now removed and errors out starting from this API version.
  • API errors are now returned as JSON instead of plain text.
  • POST /containers/create and POST /containers/(id)/start allow you to configure kernel parameters (sysctls) for use in the container.
  • POST /containers/<container ID>/exec and POST /exec/<exec ID>/start no longer expects a “Container” field to be present. This property was not used and is no longer sent by the docker client.
  • POST /containers/create/ now validates the hostname (should be a valid RFC 1123 hostname).
  • POST /containers/create/ HostConfig.PidMode field now accepts container:<name|id>, to have the container join the PID namespace of an existing container.

v1.23 API changes

Docker Engine API v1.23 documentation

  • GET /containers/json returns the state of the container, one of created, restarting, running, paused, exited or dead.
  • GET /containers/json returns the mount points for the container.
  • GET /networks/(name) now returns an Internal field showing whether the network is internal or not.
  • GET /networks/(name) now returns an EnableIPv6 field showing whether the network has ipv6 enabled or not.
  • POST /containers/(name)/update now supports updating container’s restart policy.
  • POST /networks/create now supports enabling ipv6 on the network by setting the EnableIPv6 field (doing this with a label will no longer work).
  • GET /info now returns CgroupDriver field showing what cgroup driver the daemon is using; cgroupfs or systemd.
  • GET /info now returns KernelMemory field, showing if “kernel memory limit” is supported.
  • POST /containers/create now takes PidsLimit field, if the kernel is >= 4.3 and the pids cgroup is supported.
  • GET /containers/(id or name)/stats now returns pids_stats, if the kernel is >= 4.3 and the pids cgroup is supported.
  • POST /containers/create now allows you to override usernamespaces remapping and use privileged options for the container.
  • POST /containers/create now allows specifying nocopy for named volumes, which disables automatic copying from the container path to the volume.
  • POST /auth now returns an IdentityToken when supported by a registry.
  • POST /containers/create with both Hostname and Domainname fields specified will result in the container’s hostname being set to Hostname, rather than Hostname.Domainname.
  • GET /volumes now supports more filters, new added filters are name and driver.
  • GET /containers/(id or name)/logs now accepts a details query parameter to stream the extra attributes that were provided to the containers LogOpts, such as environment variables and labels, with the logs.
  • POST /images/load now returns progress information as a JSON stream, and has a quiet query parameter to suppress progress details.

v1.22 API changes

Docker Engine API v1.22 documentation

  • POST /container/(name)/update updates the resources of a container.
  • GET /containers/json supports filter isolation on Windows.
  • GET /containers/json now returns the list of networks of containers.
  • GET /info Now returns Architecture and OSType fields, providing information about the host architecture and operating system type that the daemon runs on.
  • GET /networks/(name) now returns a Name field for each container attached to the network.
  • GET /version now returns the BuildTime field in RFC3339Nano format to make it consistent with other date/time values returned by the API.
  • AuthConfig now supports a registrytoken for token based authentication
  • POST /containers/create now has a 4M minimum value limit for HostConfig.KernelMemory
  • Pushes initiated with POST /images/(name)/push and pulls initiated with POST /images/create will be cancelled if the HTTP connection making the API request is closed before the push or pull completes.
  • POST /containers/create now allows you to set a read/write rate limit for a device (in bytes per second or IO per second).
  • GET /networks now supports filtering by name, id and type.
  • POST /containers/create now allows you to set the static IPv4 and/or IPv6 address for the container.
  • POST /networks/(id)/connect now allows you to set the static IPv4 and/or IPv6 address for the container.
  • GET /info now includes the number of containers running, stopped, and paused.
  • POST /networks/create now supports restricting external access to the network by setting the Internal field.
  • POST /networks/(id)/disconnect now includes a Force option to forcefully disconnect a container from network
  • GET /containers/(id)/json now returns the NetworkID of containers.
  • POST /networks/create Now supports an options field in the IPAM config that provides options for custom IPAM plugins.
  • GET /networks/{network-id} Now returns IPAM config options for custom IPAM plugins if any are available.
  • GET /networks/<network-id> now returns subnets info for user-defined networks.
  • GET /info can now return a SystemStatus field useful for returning additional information about applications that are built on top of engine.

v1.21 API changes

Docker Engine API v1.21 documentation

  • GET /volumes lists volumes from all volume drivers.
  • POST /volumes/create to create a volume.
  • GET /volumes/(name) get low-level information about a volume.
  • DELETE /volumes/(name) remove a volume with the specified name.
  • VolumeDriver was moved from config to HostConfig to make the configuration portable.
  • GET /images/(name)/json now returns information about an image’s RepoTags and RepoDigests.
  • The config option now accepts the field StopSignal, which specifies the signal to use to kill a container.
  • GET /containers/(id)/stats will return networking information respectively for each interface.
  • The HostConfig option now includes the DnsOptions field to configure the container’s DNS options.
  • POST /build now optionally takes a serialized map of build-time variables.
  • GET /events now includes a timenano field, in addition to the existing time field.
  • GET /events now supports filtering by image and container labels.
  • GET /info now lists engine version information and return the information of CPUShares and Cpuset.
  • GET /containers/json will return ImageID of the image used by container.
  • POST /exec/(name)/start will now return an HTTP 409 when the container is either stopped or paused.
  • POST /containers/create now takes KernelMemory in HostConfig to specify kernel memory limit.
  • GET /containers/(name)/json now accepts a size parameter. Setting this parameter to ‘1’ returns container size information in the SizeRw and SizeRootFs fields.
  • GET /containers/(name)/json now returns a NetworkSettings.Networks field, detailing network settings per network. This field deprecates the NetworkSettings.Gateway, NetworkSettings.IPAddress, NetworkSettings.IPPrefixLen, and NetworkSettings.MacAddress fields, which are still returned for backward-compatibility, but will be removed in a future version.
  • GET /exec/(id)/json now returns a NetworkSettings.Networks field, detailing networksettings per network. This field deprecates the NetworkSettings.Gateway, NetworkSettings.IPAddress, NetworkSettings.IPPrefixLen, and NetworkSettings.MacAddress fields, which are still returned for backward-compatibility, but will be removed in a future version.
  • The HostConfig option now includes the OomScoreAdj field for adjusting the badness heuristic. This heuristic selects which processes the OOM killer kills under out-of-memory conditions.

v1.20 API changes

Docker Engine API v1.20 documentation

  • GET /containers/(id)/archive get an archive of filesystem content from a container.
  • PUT /containers/(id)/archive upload an archive of content to be extracted to an existing directory inside a container’s filesystem.
  • POST /containers/(id)/copy is deprecated in favor of the above archive endpoint which can be used to download files and directories from a container.
  • The hostConfig option now accepts the field GroupAdd, which specifies a list of additional groups that the container process will run as.

v1.19 API changes

Docker Engine API v1.19 documentation

  • When the daemon detects a version mismatch with the client, usually when the client is newer than the daemon, an HTTP 400 is now returned instead of a 404.
  • GET /containers/(id)/stats now accepts stream bool to get only one set of stats and disconnect.
  • GET /containers/(id)/logs now accepts a since timestamp parameter.
  • GET /info The fields Debug, IPv4Forwarding, MemoryLimit, and SwapLimit are now returned as boolean instead of as an int. In addition, the end point now returns the new boolean fields CpuCfsPeriod, CpuCfsQuota, and OomKillDisable.
  • The hostConfig option now accepts the fields CpuPeriod and CpuQuota
  • POST /build accepts cpuperiod and cpuquota options

v1.18 API changes

Docker Engine API v1.18 documentation

  • GET /version now returns Os, Arch and KernelVersion.
  • POST /containers/create and POST /containers/(id)/startallow you to set ulimit settings for use in the container.
  • GET /info now returns SystemTime, HttpProxy,HttpsProxy and NoProxy.
  • GET /images/json added a RepoDigests field to include image digest information.
  • POST /build can now set resource constraints for all containers created for the build.
  • CgroupParent can be passed in the host config to setup container cgroups under a specific cgroup.
  • POST /build closing the HTTP request cancels the build
  • POST /containers/(id)/exec includes Warnings field to response.
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