docker_network – Manage Docker networks

Synopsis

  • Create/remove Docker networks and connect containers to them.

  • Performs largely the same function as the “docker network” CLI subcommand.

Requirements

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

  • Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details).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 >= 1.10.0 (use docker-py for Python 2.6)

  • The docker server >= 1.10.0

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
appends
boolean
    Choices:
  • no ←
  • yes
By default the connected list is canonical, meaning containers not on the list are removed from the network.
Use appends to leave existing containers connected.

aliases: incremental
attachable
boolean
added in 2.8
    Choices:
  • no
  • yes
If enabled, and the network is in the global scope, non-service containers on worker nodes will be able to connect to the network.
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
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
connected
list / elements=string
List of container names or container IDs to connect to a network.
Please note that the module only makes sure that these containers are connected to the network, but does not care about connection options. If you rely on specific IP addresses etc., use the docker_container module to ensure your containers are correctly connected to this network.

aliases: containers
debug
boolean
    Choices:
  • no ←
  • yes
Debug mode
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
driver
string
Default:
"bridge"
Specify the type of network. Docker provides bridge and overlay drivers, but 3rd party drivers can also be used.
driver_options
dictionary
Dictionary of network settings. Consult docker docs for valid options and values.
enable_ipv6
boolean
added in 2.8
    Choices:
  • no
  • yes
Enable IPv6 networking.
force
boolean
    Choices:
  • no ←
  • yes
With state absent forces disconnecting all containers from the network prior to deleting the network. With state present will disconnect all containers, delete the network and re-create the network.
This option is required if you have changed the IPAM or driver options and want an existing network to be updated to use the new options.
internal
boolean
added in 2.8
    Choices:
  • no
  • yes
Restrict external access to the network.
ipam_config
list / elements=dictionary
added in 2.8
List of IPAM config blocks. Consult Docker docs for valid options and values. Note that iprange is spelled differently here (we use the notation from the Docker SDK for Python).
aux_addresses
dictionary
Auxiliary IP addresses used by Network driver, as a mapping from hostname to IP.
gateway
string
IP gateway address.
iprange
string
IP address range in CIDR notation.
subnet
string
IP subset in CIDR notation.
ipam_driver
string
Specify an IPAM driver.
ipam_driver_options
dictionary
added in 2.8
Dictionary of IPAM driver options.
ipam_options
dictionary
Dictionary of IPAM options.
Deprecated in 2.8, will be removed in 2.12. Use parameter ipam_config instead. In Docker 1.10.0, IPAM options were introduced (see here). This module parameter addresses the IPAM config not the newly introduced IPAM options. For the IPAM options, see the ipam_driver_options parameter.
aux_addresses
dictionary
Auxiliary IP addresses used by Network driver, as a mapping from hostname to IP.
gateway
string
IP gateway address.
iprange
string
IP address range in CIDR notation.
subnet
string
IP subset in CIDR notation.
labels
dictionary
added in 2.8
Dictionary of labels.
name
string / required
Name of the network to operate on.

aliases: network_name
scope
string
added in 2.8
    Choices:
  • local
  • global
  • swarm
Specify the network's scope.
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 ←
absent deletes the network. If a network has connected containers, it cannot be deleted. Use the force option to disconnect all containers and delete the network.
present creates the network, if it does not already exist with the specified parameters, and connects the list of containers provided via the connected parameter. Containers not on the list will be disconnected. An empty list will leave no containers connected to the network. Use the appends option to leave existing containers connected. Use the force options to force re-creation of the network.
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.
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

Notes

Note

  • When network options are changed, the module disconnects all containers from the network, deletes the network, and re-creates the network. It does not try to reconnect containers, except the ones listed in (connected, and even for these, it does not consider specific connection options like fixed IP addresses or MAC addresses. If you need more control over how the containers are connected to the network, loop the docker_container module to loop over your containers to make sure they are connected properly.

  • The module does not support Docker Swarm, i.e. it will not try to disconnect or reconnect services. If services are connected to the network, deleting the network will fail. When network options are changed, the network has to be deleted and recreated, so this will fail as well.

  • 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 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 network
  docker_network:
    name: network_one

- name: Remove all but selected list of containers
  docker_network:
    name: network_one
    connected:
      - container_a
      - container_b
      - container_c

- name: Remove a single container
  docker_network:
    name: network_one
    connected: "{{ fulllist|difference(['container_a']) }}"

- name: Add a container to a network, leaving existing containers connected
  docker_network:
    name: network_one
    connected:
      - container_a
    appends: yes

- name: Create a network with driver options
  docker_network:
    name: network_two
    driver_options:
      com.docker.network.bridge.name: net2

- name: Create a network with custom IPAM config
  docker_network:
    name: network_three
    ipam_config:
      - subnet: 172.3.27.0/24
        gateway: 172.3.27.2
        iprange: 172.3.27.0/26
        aux_addresses:
          host1: 172.3.27.3
          host2: 172.3.27.4

- name: Create a network with labels
  docker_network:
    name: network_four
    labels:
      key1: value1
      key2: value2

- name: Create a network with IPv6 IPAM config
  docker_network:
    name: network_ipv6_one
    enable_ipv6: yes
    ipam_config:
      - subnet: fdd1:ac8c:0557:7ce1::/64

- name: Create a network with IPv6 and custom IPv4 IPAM config
  docker_network:
    name: network_ipv6_two
    enable_ipv6: yes
    ipam_config:
      - subnet: 172.4.27.0/24
      - subnet: fdd1:ac8c:0557:7ce2::/64

- name: Delete a network, disconnecting all containers
  docker_network:
    name: network_one
    state: absent
    force: yes

Return Values

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

Key Returned Description
network
dictionary
success
Network inspection results for the affected network.
Note that facts are part of the registered vars since Ansible 2.8. For compatibility reasons, the facts are also accessible directly as docker_network. Note that the returned fact will be removed in Ansible 2.12.


Status

Authors

  • Ben Keith (@keitwb)

  • Chris Houseknecht (@chouseknecht)

  • Dave Bendit (@DBendit)

Hint

If you notice any issues in this documentation, you can edit this document to improve it.