community.general.docker_container – manage docker containers

Note

This plugin is part of the community.general collection.

To install it use: ansible-galaxy collection install community.general.

To use it in a playbook, specify: community.general.docker_container.

Synopsis

  • Manage the life cycle of docker containers.

  • Supports check mode. Run with --check and --diff to view config difference and list of actions to be taken.

Requirements

The below requirements are needed on the host that executes this module.

  • Docker API >= 1.20

  • Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details). For Python 2.6, docker-py must be used. Otherwise, it is recommended to install the docker Python module. Note that both modules should not be installed at the same time. Also note that when both modules are installed and one of them is uninstalled, the other might no longer function and a reinstall of it is required.

  • Docker SDK for Python >= 1.8.0 (use docker-py for Python 2.6)

Parameters

Parameter Choices/Defaults Comments
api_version
string
Default:
"auto"
The version of the Docker API running on the Docker Host.
Defaults to the latest version of the API supported by Docker SDK for Python and the docker daemon.
If the value is not specified in the task, the value of environment variable DOCKER_API_VERSION will be used instead. If the environment variable is not set, the default value will be used.

aliases: docker_api_version
auto_remove
boolean
    Choices:
  • no
  • yes
Enable auto-removal of the container on daemon side when the container's process exits.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
blkio_weight
integer
Block IO (relative weight), between 10 and 1000.
ca_cert
path
Use a CA certificate when performing server verification by providing the path to a CA certificate file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file ca.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_ca_cert, cacert_path
cap_drop
list / elements=string
List of capabilities to drop from the container.
capabilities
list / elements=string
List of capabilities to add to the container.
cleanup
boolean
    Choices:
  • no ←
  • yes
Use with detach=false to remove the container after successful execution.
client_cert
path
Path to the client's TLS certificate file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file cert.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_client_cert, cert_path
client_key
path
Path to the client's TLS key file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file key.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_client_key, key_path
command
raw
Command to execute when the container starts. A command may be either a string or a list.
Prior to version 2.4, strings were split on commas.
comparisons
dictionary
Allows to specify how properties of existing containers are compared with module options to decide whether the container should be recreated / updated or not.
Only options which correspond to the state of a container as handled by the Docker daemon can be specified, as well as networks.
Must be a dictionary specifying for an option one of the keys strict, ignore and allow_more_present.
If strict is specified, values are tested for equality, and changes always result in updating or restarting. If ignore is specified, changes are ignored.
allow_more_present is allowed only for lists, sets and dicts. If it is specified for lists or sets, the container will only be updated or restarted if the module option contains a value which is not present in the container's options. If the option is specified for a dict, the container will only be updated or restarted if the module option contains a key which isn't present in the container's option, or if the value of a key present differs.
The wildcard option * can be used to set one of the default values strict or ignore to *all* comparisons which are not explicitly set to other values.
See the examples for details.
container_default_behavior
string
added in 0.2.0 of
    Choices:
  • compatibility
  • no_defaults
Various module options used to have default values. This causes problems with containers which use different values for these options.
The default value is compatibility, which will ensure that the default values are used when the values are not explicitly specified by the user.
From community.general 3.0.0 on, the default value will switch to no_defaults. To avoid deprecation warnings, please set container_default_behavior to an explicit value.
This affects the auto_remove, detach, init, interactive, memory, paused, privileged, read_only and tty options.
cpu_period
integer
Limit CPU CFS (Completely Fair Scheduler) period.
See cpus for an easier to use alternative.
cpu_quota
integer
Limit CPU CFS (Completely Fair Scheduler) quota.
See cpus for an easier to use alternative.
cpu_shares
integer
CPU shares (relative weight).
cpus
float
added in 0.2.0 of
Specify how much of the available CPU resources a container can use.
A value of 1.5 means that at most one and a half CPU (core) will be used.
cpuset_cpus
string
CPUs in which to allow execution 1,3 or 1-3.
cpuset_mems
string
Memory nodes (MEMs) in which to allow execution 0-3 or 0,1.
debug
boolean
    Choices:
  • no ←
  • yes
Debug mode
detach
boolean
    Choices:
  • no
  • yes
Enable detached mode to leave the container running in background.
If disabled, the task will reflect the status of the container run (failed if the command failed).
If container_default_behavior is set to compatiblity (the default value), this option has a default of yes.
device_read_bps
list / elements=dictionary
List of device path and read rate (bytes per second) from device.
path
string / required
Device path in the container.
rate
string / required
Device read limit in format <number>[<unit>].
Number is a positive integer. Unit can be one of B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
device_read_iops
list / elements=dictionary
List of device and read rate (IO per second) from device.
path
string / required
Device path in the container.
rate
integer / required
Device read limit.
Must be a positive integer.
device_write_bps
list / elements=dictionary
List of device and write rate (bytes per second) to device.
path
string / required
Device path in the container.
rate
string / required
Device read limit in format <number>[<unit>].
Number is a positive integer. Unit can be one of B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
device_write_iops
list / elements=dictionary
List of device and write rate (IO per second) to device.
path
string / required
Device path in the container.
rate
integer / required
Device read limit.
Must be a positive integer.
devices
list / elements=string
List of host device bindings to add to the container.
Each binding is a mapping expressed in the format <path_on_host>:<path_in_container>:<cgroup_permissions>.
dns_opts
list / elements=string
List of DNS options.
dns_search_domains
list / elements=string
List of custom DNS search domains.
dns_servers
list / elements=string
List of custom DNS servers.
docker_host
string
Default:
"unix://var/run/docker.sock"
The URL or Unix socket path used to connect to the Docker API. To connect to a remote host, provide the TCP connection string. For example, tcp://192.0.2.23:2376. If TLS is used to encrypt the connection, the module will automatically replace tcp in the connection URL with https.
If the value is not specified in the task, the value of environment variable DOCKER_HOST will be used instead. If the environment variable is not set, the default value will be used.

aliases: docker_url
domainname
string
Container domainname.
entrypoint
list / elements=string
Command that overwrites the default ENTRYPOINT of the image.
env
dictionary
Dictionary of key,value pairs.
Values which might be parsed as numbers, booleans or other types by the YAML parser must be quoted (e.g. "true") in order to avoid data loss.
env_file
path
Path to a file, present on the target, containing environment variables FOO=BAR.
If variable also present in env, then the env value will override.
etc_hosts
dictionary
Dict of host-to-IP mappings, where each host name is a key in the dictionary. Each host name will be added to the container's /etc/hosts file.
exposed_ports
list / elements=string
List of additional container ports which informs Docker that the container listens on the specified network ports at runtime.
If the port is already exposed using EXPOSE in a Dockerfile, it does not need to be exposed again.

aliases: exposed, expose
force_kill
boolean
    Choices:
  • no ←
  • yes
Use the kill command when stopping a running container.

aliases: forcekill
groups
list / elements=string
List of additional group names and/or IDs that the container process will run as.
healthcheck
dictionary
Configure a check that is run to determine whether or not containers for this service are "healthy".
See the docs for the HEALTHCHECK Dockerfile instruction for details on how healthchecks work.
interval, timeout and start_period are specified as durations. They accept duration as a string in a format that look like: 5h34m56s, 1m30s etc. The supported units are us, ms, s, m and h.
interval
string
Time between running the check.
The default used by the Docker daemon is 30s.
retries
integer
Consecutive number of failures needed to report unhealthy.
The default used by the Docker daemon is 3.
start_period
string
Start period for the container to initialize before starting health-retries countdown.
The default used by the Docker daemon is 0s.
test
raw
Command to run to check health.
Must be either a string or a list. If it is a list, the first item must be one of NONE, CMD or CMD-SHELL.
timeout
string
Maximum time to allow one check to run.
The default used by the Docker daemon is 30s.
hostname
string
The container's hostname.
ignore_image
boolean
    Choices:
  • no ←
  • yes
When state is present or started, the module compares the configuration of an existing container to requested configuration. The evaluation includes the image version. If the image version in the registry does not match the container, the container will be recreated. You can stop this behavior by setting ignore_image to True.
*Warning:* This option is ignored if image: ignore or *: ignore is specified in the comparisons option.
image
string
Repository path and tag used to create the container. If an image is not found or pull is true, the image will be pulled from the registry. If no tag is included, latest will be used.
Can also be an image ID. If this is the case, the image is assumed to be available locally. The pull option is ignored for this case.
init
boolean
    Choices:
  • no
  • yes
Run an init inside the container that forwards signals and reaps processes.
This option requires Docker API >= 1.25.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
interactive
boolean
    Choices:
  • no
  • yes
Keep stdin open after a container is launched, even if not attached.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
ipc_mode
string
Set the IPC mode for the container.
Can be one of container:<name|id> to reuse another container's IPC namespace or host to use the host's IPC namespace within the container.
keep_volumes
boolean
    Choices:
  • no
  • yes ←
Retain anonymous volumes associated with a removed container.
kernel_memory
string
Kernel memory limit in format <number>[<unit>]. Number is a positive integer. Unit can be B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte). Minimum is 4M.
Omitting the unit defaults to bytes.
kill_signal
string
Override default signal used to kill a running container.
labels
dictionary
Dictionary of key value pairs.
links
list / elements=string
List of name aliases for linked containers in the format container_name:alias.
Setting this will force container to be restarted.
log_driver
string
Specify the logging driver. Docker uses json-file by default.
See here for possible choices.
log_options
dictionary
Dictionary of options specific to the chosen log_driver.

aliases: log_opt
mac_address
string
Container MAC address (e.g. 92:d0:c6:0a:29:33).
memory
string
Memory limit in format <number>[<unit>]. Number is a positive integer. Unit can be B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
If container_default_behavior is set to compatiblity (the default value), this option has a default of "0".
memory_reservation
string
Memory soft limit in format <number>[<unit>]. Number is a positive integer. Unit can be B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
memory_swap
string
Total memory limit (memory + swap) in format <number>[<unit>]. Number is a positive integer. Unit can be B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
memory_swappiness
integer
Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
If not set, the value will be remain the same if container exists and will be inherited from the host machine if it is (re-)created.
mounts
list / elements=dictionary
Specification for mounts to be added to the container. More powerful alternative to volumes.
consistency
string
    Choices:
  • cached
  • consistent
  • default
  • delegated
The consistency requirement for the mount.
labels
dictionary
User-defined name and labels for the volume. Only valid for the volume type.
no_copy
boolean
    Choices:
  • no
  • yes
False if the volume should be populated with the data from the target. Only valid for the volume type.
The default value is false.
propagation
string
    Choices:
  • private
  • rprivate
  • shared
  • rshared
  • slave
  • rslave
Propagation mode. Only valid for the bind type.
read_only
boolean
    Choices:
  • no
  • yes
Whether the mount should be read-only.
source
string
Mount source (e.g. a volume name or a host path).
target
string / required
Path inside the container.
tmpfs_mode
string
The permission mode for the tmpfs mount.
tmpfs_size
string
The size for the tmpfs mount in bytes in format <number>[<unit>].
Number is a positive integer. Unit can be one of B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes.
type
string
    Choices:
  • bind
  • npipe
  • tmpfs
  • volume ←
The mount type.
Note that npipe is only supported by Docker for Windows.
volume_driver
string
Specify the volume driver. Only valid for the volume type.
See here for details.
volume_options
dictionary
Dictionary of options specific to the chosen volume_driver. See here for details.
name
string / required
Assign a name to a new container or match an existing container.
When identifying an existing container name may be a name or a long or short container ID.
network_mode
string
Connect the container to a network. Choices are bridge, host, none, container:<name|id>, <network_name> or default.
*Note* that from community.general 3.0.0 on, if networks_cli_compatible is true and networks contains at least one network, the default value for network_mode will be the name of the first network in the networks list. You can prevent this by explicitly specifying a value for network_mode, like the default value default which will be used by Docker if network_mode is not specified.
networks
list / elements=dictionary
List of networks the container belongs to.
For examples of the data structure and usage see EXAMPLES below.
To remove a container from one or more networks, use the purge_networks option.
Note that as opposed to docker run ..., community.general.docker_container does not remove the default network if networks is specified. You need to explicitly use purge_networks to enforce the removal of the default network (and all other networks not explicitly mentioned in networks). Alternatively, use the networks_cli_compatible option, which will be enabled by default from community.general 2.0.0 on.
aliases
list / elements=string
List of aliases for this container in this network. These names can be used in the network to reach this container.
ipv4_address
string
The container's IPv4 address in this network.
ipv6_address
string
The container's IPv6 address in this network.
links
list / elements=string
A list of containers to link to.
name
string / required
The network's name.
networks_cli_compatible
boolean
    Choices:
  • no
  • yes
When networks are provided to the module via the networks option, the module behaves differently than docker run --network: docker run --network other will create a container with network other attached, but the default network not attached. This module with networks: {name: other} will create a container with both default and other attached. If purge_networks is set to yes, the default network will be removed afterwards.
If networks_cli_compatible is set to yes, this module will behave as docker run --network and will *not* add the default network if networks is specified. If networks is not specified, the default network will be attached.
*Note* that docker CLI also sets network_mode to the name of the first network added if --network is specified. For more compatibility with docker CLI, you explicitly have to set network_mode to the name of the first network you're adding. This behavior will change for community.general 3.0.0: then network_mode will automatically be set to the first network name in networks if network_mode is not specified, networks has at least one entry and networks_cli_compatible is true.
Current value is no. A new default of yes will be set in community.general 2.0.0.
oom_killer
boolean
    Choices:
  • no
  • yes
Whether or not to disable OOM Killer for the container.
oom_score_adj
integer
An integer value containing the score given to the container in order to tune OOM killer preferences.
output_logs
boolean
    Choices:
  • no ←
  • yes
If set to true, output of the container command will be printed.
Only effective when log_driver is set to json-file or journald.
paused
boolean
    Choices:
  • no
  • yes
Use with the started state to pause running processes inside the container.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
pid_mode
string
Set the PID namespace mode for the container.
Note that Docker SDK for Python < 2.0 only supports host. Newer versions of the Docker SDK for Python (docker) allow all values supported by the Docker daemon.
pids_limit
integer
Set PIDs limit for the container. It accepts an integer value.
Set -1 for unlimited PIDs.
privileged
boolean
    Choices:
  • no
  • yes
Give extended privileges to the container.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
published_ports
list / elements=string
List of ports to publish from the container to the host.
Use docker CLI syntax: 8000, 9000:8000, or 0.0.0.0:9000:8000, where 8000 is a container port, 9000 is a host port, and 0.0.0.0 is a host interface.
Port ranges can be used for source and destination ports. If two ranges with different lengths are specified, the shorter range will be used. Since community.general 0.2.0, if the source port range has length 1, the port will not be assigned to the first port of the destination range, but to a free port in that range. This is the same behavior as for docker command line utility.
Bind addresses must be either IPv4 or IPv6 addresses. Hostnames are *not* allowed. This is different from the docker command line utility. Use the dig lookup to resolve hostnames.
A value of all will publish all exposed container ports to random host ports, ignoring any other mappings.
If networks parameter is provided, will inspect each network to see if there exists a bridge network with optional parameter com.docker.network.bridge.host_binding_ipv4. If such a network is found, then published ports where no host IP address is specified will be bound to the host IP pointed to by com.docker.network.bridge.host_binding_ipv4. Note that the first bridge network with a com.docker.network.bridge.host_binding_ipv4 value encountered in the list of networks is the one that will be used.

aliases: ports
pull
boolean
    Choices:
  • no ←
  • yes
If true, always pull the latest version of an image. Otherwise, will only pull an image when missing.
*Note:* images are only pulled when specified by name. If the image is specified as a image ID (hash), it cannot be pulled.
purge_networks
boolean
    Choices:
  • no ←
  • yes
Remove the container from ALL networks not included in networks parameter.
Any default networks such as bridge, if not found in networks, will be removed as well.
read_only
boolean
    Choices:
  • no
  • yes
Mount the container's root file system as read-only.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
recreate
boolean
    Choices:
  • no ←
  • yes
Use with present and started states to force the re-creation of an existing container.
removal_wait_timeout
float
added in 0.2.0 of
When removing an existing container, the docker daemon API call exists after the container is scheduled for removal. Removal usually is very fast, but it can happen that during high I/O load, removal can take longer. By default, the module will wait until the container has been removed before trying to (re-)create it, however long this takes.
By setting this option, the module will wait at most this many seconds for the container to be removed. If the container is still in the removal phase after this many seconds, the module will fail.
restart
boolean
    Choices:
  • no ←
  • yes
Use with started state to force a matching container to be stopped and restarted.
restart_policy
string
    Choices:
  • no
  • on-failure
  • always
  • unless-stopped
Container restart policy.
Place quotes around no option.
restart_retries
integer
Use with restart policy to control maximum number of restart attempts.
runtime
string
Runtime to use for the container.
security_opts
list / elements=string
List of security options in the form of "label:user:User".
shm_size
string
Size of /dev/shm in format <number>[<unit>]. Number is positive integer. Unit can be B (byte), K (kibibyte, 1024B), M (mebibyte), G (gibibyte), T (tebibyte), or P (pebibyte).
Omitting the unit defaults to bytes. If you omit the size entirely, Docker daemon uses 64M.
ssl_version
string
Provide a valid SSL version number. Default value determined by ssl.py module.
If the value is not specified in the task, the value of environment variable DOCKER_SSL_VERSION will be used instead.
state
string
    Choices:
  • absent
  • present
  • stopped
  • started ←
absent - A container matching the specified name will be stopped and removed. Use force_kill to kill the container rather than stopping it. Use keep_volumes to retain anonymous volumes associated with the removed container.
present - Asserts the existence of a container matching the name and any provided configuration parameters. If no container matches the name, a container will be created. If a container matches the name but the provided configuration does not match, the container will be updated, if it can be. If it cannot be updated, it will be removed and re-created with the requested config.
started - Asserts that the container is first present, and then if the container is not running moves it to a running state. Use restart to force a matching container to be stopped and restarted.
stopped - Asserts that the container is first present, and then if the container is running moves it to a stopped state.
To control what will be taken into account when comparing configuration, see the comparisons option. To avoid that the image version will be taken into account, you can also use the ignore_image option.
Use the recreate option to always force re-creation of a matching container, even if it is running.
If the container should be killed instead of stopped in case it needs to be stopped for recreation, or because state is stopped, please use the force_kill option. Use keep_volumes to retain anonymous volumes associated with a removed container.
Use keep_volumes to retain anonymous volumes associated with a removed container.
stop_signal
string
Override default signal used to stop the container.
stop_timeout
integer
Number of seconds to wait for the container to stop before sending SIGKILL. When the container is created by this module, its StopTimeout configuration will be set to this value.
When the container is stopped, will be used as a timeout for stopping the container. In case the container has a custom StopTimeout configuration, the behavior depends on the version of the docker daemon. New versions of the docker daemon will always use the container's configured StopTimeout value if it has been configured.
sysctls
dictionary
Dictionary of key,value pairs.
timeout
integer
Default:
60
The maximum amount of time in seconds to wait on a response from the API.
If the value is not specified in the task, the value of environment variable DOCKER_TIMEOUT will be used instead. If the environment variable is not set, the default value will be used.
tls
boolean
    Choices:
  • no ←
  • yes
Secure the connection to the API by using TLS without verifying the authenticity of the Docker host server. Note that if validate_certs is set to yes as well, it will take precedence.
If the value is not specified in the task, the value of environment variable DOCKER_TLS will be used instead. If the environment variable is not set, the default value will be used.
tls_hostname
string
Default:
"localhost"
When verifying the authenticity of the Docker Host server, provide the expected name of the server.
If the value is not specified in the task, the value of environment variable DOCKER_TLS_HOSTNAME will be used instead. If the environment variable is not set, the default value will be used.
tmpfs
list / elements=string
Mount a tmpfs directory.
trust_image_content
boolean
    Choices:
  • no ←
  • yes
If yes, skip image verification.
The option has never been used by the module. It will be removed in community.general 3.0.0.
tty
boolean
    Choices:
  • no
  • yes
Allocate a pseudo-TTY.
If container_default_behavior is set to compatiblity (the default value), this option has a default of no.
ulimits
list / elements=string
List of ulimit options. A ulimit is specified as nofile:262144:262144.
user
string
Sets the username or UID used and optionally the groupname or GID for the specified command.
Can be of the forms user, user:group, uid, uid:gid, user:gid or uid:group.
userns_mode
string
Set the user namespace mode for the container. Currently, the only valid value are host and the empty string.
uts
string
Set the UTS namespace mode for the container.
validate_certs
boolean
    Choices:
  • no ←
  • yes
Secure the connection to the API by using TLS and verifying the authenticity of the Docker host server.
If the value is not specified in the task, the value of environment variable DOCKER_TLS_VERIFY will be used instead. If the environment variable is not set, the default value will be used.

aliases: tls_verify
volume_driver
string
The container volume driver.
volumes
list / elements=string
List of volumes to mount within the container.
Use docker CLI-style syntax: /host:/container[:mode]
Mount modes can be a comma-separated list of various modes such as ro, rw, consistent, delegated, cached, rprivate, private, rshared, shared, rslave, slave, and nocopy. Note that the docker daemon might not support all modes and combinations of such modes.
SELinux hosts can additionally use z or Z to use a shared or private label for the volume.
Note that Ansible 2.7 and earlier only supported one mode, which had to be one of ro, rw, z, and Z.
volumes_from
list / elements=string
List of container names or IDs to get volumes from.
working_dir
string
Path to the working directory.

Notes

Note

  • For most config changes, the container needs to be recreated, i.e. the existing container has to be destroyed and a new one created. This can cause unexpected data loss and downtime. You can use the comparisons option to prevent this.

  • If the module needs to recreate the container, it will only use the options provided to the module to create the new container (except image). Therefore, always specify all options relevant to the container.

  • When restart is set to true, the module will only restart the container if no config changes are detected. Please note that several options have default values; if the container to be restarted uses different values for these options, it will be recreated instead. The options with default values which can cause this are auto_remove, detach, init, interactive, memory, paused, privileged, read_only and tty. This behavior can be changed by setting container_default_behavior to no_defaults, which will be the default value from community.general 3.0.0 on.

  • Connect to the Docker daemon by providing parameters with each task or by defining environment variables. You can define DOCKER_HOST, DOCKER_TLS_HOSTNAME, DOCKER_API_VERSION, DOCKER_CERT_PATH, DOCKER_SSL_VERSION, DOCKER_TLS, DOCKER_TLS_VERIFY and DOCKER_TIMEOUT. If you are using docker machine, run the script shipped with the product that sets up the environment. It will set these variables for you. See https://docs.docker.com/machine/reference/env/ for more details.

  • When connecting to Docker daemon with TLS, you might need to install additional Python packages. For the Docker SDK for Python, version 2.4 or newer, this can be done by installing docker[tls] with ansible.builtin.pip.

  • Note that the Docker SDK for Python only allows to specify the path to the Docker configuration for very few functions. In general, it will use $HOME/.docker/config.json if the DOCKER_CONFIG environment variable is not specified, and use $DOCKER_CONFIG/config.json otherwise.

Examples

- name: Create a data container
  community.general.docker_container:
    name: mydata
    image: busybox
    volumes:
      - /data

- name: Re-create a redis container
  community.general.docker_container:
    name: myredis
    image: redis
    command: redis-server --appendonly yes
    state: present
    recreate: yes
    exposed_ports:
      - 6379
    volumes_from:
      - mydata

- name: Restart a container
  community.general.docker_container:
    name: myapplication
    image: someuser/appimage
    state: started
    restart: yes
    links:
     - "myredis:aliasedredis"
    devices:
     - "/dev/sda:/dev/xvda:rwm"
    ports:
     # Publish container port 9000 as host port 8080
     - "8080:9000"
     # Publish container UDP port 9001 as host port 8081 on interface 127.0.0.1
     - "127.0.0.1:8081:9001/udp"
     # Publish container port 9002 as a random host port
     - "9002"
     # Publish container port 9003 as a free host port in range 8000-8100
     # (the host port will be selected by the Docker daemon)
     - "8000-8100:9003"
     # Publish container ports 9010-9020 to host ports 7000-7010
     - "7000-7010:9010-9020"
    env:
        SECRET_KEY: "ssssh"
        # Values which might be parsed as numbers, booleans or other types by the YAML parser need to be quoted
        BOOLEAN_KEY: "yes"

- name: Container present
  community.general.docker_container:
    name: mycontainer
    state: present
    image: ubuntu:14.04
    command: sleep infinity

- name: Stop a container
  community.general.docker_container:
    name: mycontainer
    state: stopped

- name: Start 4 load-balanced containers
  community.general.docker_container:
    name: "container{{ item }}"
    recreate: yes
    image: someuser/anotherappimage
    command: sleep 1d
  with_sequence: count=4

- name: Remove container
  community.general.docker_container:
    name: ohno
    state: absent

- name: Syslogging output
  community.general.docker_container:
    name: myservice
    image: busybox
    log_driver: syslog
    log_options:
      syslog-address: tcp://my-syslog-server:514
      syslog-facility: daemon
      # NOTE: in Docker 1.13+ the "syslog-tag" option was renamed to "tag" for
      # older docker installs, use "syslog-tag" instead
      tag: myservice

- name: Create db container and connect to network
  community.general.docker_container:
    name: db_test
    image: "postgres:latest"
    networks:
      - name: "{{ docker_network_name }}"

- name: Start container, connect to network and link
  community.general.docker_container:
    name: sleeper
    image: ubuntu:14.04
    networks:
      - name: TestingNet
        ipv4_address: "172.1.1.100"
        aliases:
          - sleepyzz
        links:
          - db_test:db
      - name: TestingNet2

- name: Start a container with a command
  community.general.docker_container:
    name: sleepy
    image: ubuntu:14.04
    command: ["sleep", "infinity"]

- name: Add container to networks
  community.general.docker_container:
    name: sleepy
    networks:
      - name: TestingNet
        ipv4_address: 172.1.1.18
        links:
          - sleeper
      - name: TestingNet2
        ipv4_address: 172.1.10.20

- name: Update network with aliases
  community.general.docker_container:
    name: sleepy
    networks:
      - name: TestingNet
        aliases:
          - sleepyz
          - zzzz

- name: Remove container from one network
  community.general.docker_container:
    name: sleepy
    networks:
      - name: TestingNet2
    purge_networks: yes

- name: Remove container from all networks
  community.general.docker_container:
    name: sleepy
    purge_networks: yes

- name: Start a container and use an env file
  community.general.docker_container:
    name: agent
    image: jenkinsci/ssh-slave
    env_file: /var/tmp/jenkins/agent.env

- name: Create a container with limited capabilities
  community.general.docker_container:
    name: sleepy
    image: ubuntu:16.04
    command: sleep infinity
    capabilities:
      - sys_time
    cap_drop:
      - all

- name: Finer container restart/update control
  community.general.docker_container:
    name: test
    image: ubuntu:18.04
    env:
      arg1: "true"
      arg2: "whatever"
    volumes:
      - /tmp:/tmp
    comparisons:
      image: ignore   # don't restart containers with older versions of the image
      env: strict   # we want precisely this environment
      volumes: allow_more_present   # if there are more volumes, that's ok, as long as `/tmp:/tmp` is there

- name: Finer container restart/update control II
  community.general.docker_container:
    name: test
    image: ubuntu:18.04
    env:
      arg1: "true"
      arg2: "whatever"
    comparisons:
      '*': ignore  # by default, ignore *all* options (including image)
      env: strict   # except for environment variables; there, we want to be strict

- name: Start container with healthstatus
  community.general.docker_container:
    name: nginx-proxy
    image: nginx:1.13
    state: started
    healthcheck:
      # Check if nginx server is healthy by curl'ing the server.
      # If this fails or timeouts, the healthcheck fails.
      test: ["CMD", "curl", "--fail", "http://nginx.host.com"]
      interval: 1m30s
      timeout: 10s
      retries: 3
      start_period: 30s

- name: Remove healthcheck from container
  community.general.docker_container:
    name: nginx-proxy
    image: nginx:1.13
    state: started
    healthcheck:
      # The "NONE" check needs to be specified
      test: ["NONE"]

- name: Start container with block device read limit
  community.general.docker_container:
    name: test
    image: ubuntu:18.04
    state: started
    device_read_bps:
      # Limit read rate for /dev/sda to 20 mebibytes per second
      - path: /dev/sda
        rate: 20M
    device_read_iops:
      # Limit read rate for /dev/sdb to 300 IO per second
      - path: /dev/sdb
        rate: 300

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
container
dictionary
always
Facts representing the current state of the container. Matches the docker inspection output.
Note that facts are part of the registered vars since Ansible 2.8. For compatibility reasons, the facts are also accessible directly as docker_container. Note that the returned fact will be removed in community.general 2.0.0.
Before 2.3 this was ansible_docker_container but was renamed in 2.3 to docker_container due to conflicts with the connection plugin.
Empty if state is absent
If detached is false, will include Output attribute containing any output from container run.

Sample:
{ "AppArmorProfile": "", "Args": [], "Config": { "AttachStderr": false, "AttachStdin": false, "AttachStdout": false, "Cmd": [ "/usr/bin/supervisord" ], "Domainname": "", "Entrypoint": null, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ], "ExposedPorts": { "443/tcp": {}, "80/tcp": {} }, "Hostname": "8e47bf643eb9", "Image": "lnmp_nginx:v1", "Labels": {}, "OnBuild": null, "OpenStdin": false, "StdinOnce": false, "Tty": false, "User": "", "Volumes": { "/tmp/lnmp/nginx-sites/logs/": {} }, ... }


Authors

  • Cove Schneider (@cove)

  • Joshua Conner (@joshuaconner)

  • Pavel Antonov (@softzilla)

  • Thomas Steinbach (@ThomasSteinbach)

  • Philippe Jandot (@zfil)

  • Daan Oosterveld (@dusdanig)

  • Chris Houseknecht (@chouseknecht)

  • Kassian Sun (@kassiansun)

  • Felix Fontein (@felixfontein)