airflow.contrib.operators.docker_swarm_operator

Run ephemeral Docker Swarm services

Module Contents

class airflow.contrib.operators.docker_swarm_operator.DockerSwarmOperator(image, *args, **kwargs)[source]

Bases: airflow.operators.docker_operator.DockerOperator

Execute a command as an ephemeral docker swarm service. Example use-case - Using Docker Swarm orchestration to make one-time scripts highly available.

A temporary directory is created on the host and mounted into a container to allow storing files that together exceed the default disk size of 10GB in a container. The path to the mounted directory can be accessed via the environment variable AIRFLOW_TMP_DIR.

If a login to a private registry is required prior to pulling the image, a Docker connection needs to be configured in Airflow and the connection ID be provided with the parameter docker_conn_id.

Parameters

  • image (str) – Docker image from which to create the container. If image tag is omitted, “latest” will be used.

  • api_version (str) – Remote API version. Set to auto to automatically detect the server’s version.

  • auto_remove (bool) – Auto-removal of the container on daemon side when the container’s process exits. The default is False.

  • command (str or list) – Command to be run in the container. (templated)

  • docker_url (str) – URL of the host running the docker daemon. Default is unix://var/run/docker.sock

  • environment (dict) – Environment variables to set in the container. (templated)

  • force_pull (bool) – Pull the docker image on every run. Default is False.

  • mem_limit (float or str) – Maximum amount of memory the container can use. Either a float value, which represents the limit in bytes, or a string like 128m or 1g.

  • tls_ca_cert (str) – Path to a PEM-encoded certificate authority to secure the docker connection.

  • tls_client_cert (str) – Path to the PEM-encoded certificate used to authenticate docker client.

  • tls_client_key (str) – Path to the PEM-encoded key used to authenticate docker client.

  • tls_hostname (str or bool) – Hostname to match against the docker server certificate or False to disable the check.

  • tls_ssl_version (str) – Version of SSL to use when communicating with docker daemon.

  • tmp_dir (str) – Mount point inside the container to a temporary directory created on the host by the operator. The path is also made available via the environment variable AIRFLOW_TMP_DIR inside the container.

  • user (int or str) – Default user inside the docker container.

  • docker_conn_id (str) – ID of the Airflow connection to use

_run_image(self)[source]
on_kill(self)[source]

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