loki/cmd/docker-driver/config.json

{
	"description": "Loki Logging Driver",
	"documentation": "https://github.com/grafana/loki",
	"entrypoint": ["/bin/docker-driver"],
	"network": {
		"type": "host"
	},
	"interface": {
		"types": ["docker.logdriver/1.0"],
		"socket": "loki.sock"
	},
	"env": [
		{
			"name": "LOG_LEVEL",
			"description": "Set log level to output for plugin logs",
			"value": "info",
			"settable": ["value"]
		}
	]
}