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Docker Provider

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Docker Provider

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Provides inventory information from Docker. The available keys are:

Key	Type	Description
`docker.id`	`string`	ID of the container
`docker.cmd`	`string`	Arg path of container
`docker.name`	`string`	Name of the container
`docker.image`	`string`	Image of the container
`docker.labels`	`string`	Labels of the container
`docker.ports`	`string`	Ports of the container
`docker.paths`	`object`	Object of paths for the container
`docker.paths.log`	`string`	Log path of the container

For example, the Docker provider provides the following inventory:

[
    {
       "id": "1",
       "mapping:": {"id": "1", "paths": {"log": "/var/log/containers/1.log"}},
       "processors": {"add_fields": {"container.name": "my-container"}}
    },
    {
        "id": "2",
        "mapping": {"id": "2", "paths": {"log": "/var/log/containers/2.log"}},
        "processors": {"add_fields": {"container.name": "other-container"}}
    }
]

Elastic Agent automatically prefixes the result with docker:

---
[
    {"docker": {"id": "1", "paths": {"log": "/var/log/containers/1.log"}}},
    {"docker": {"id": "2", "paths": {"log": "/var/log/containers/2.log"}},
]
---

To set the log path dynamically in the configuration, use a variable in the Elastic Agent policy to return path information from the provider:

inputs:
  - type: logfile
    path: "${docker.paths.log}"

The policy generated by this configuration looks like:

inputs:
  - type: logfile
    path: "/var/log/containers/1.log"
    processors:
      - add_fields:
          container.name: my-container
  - type: logfile
    path: "/var/log/containers/2.log"
    processors:
      - add_fields:
          container.name: other-container

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