def docker(cls, service, params):
"""
Consul Docker Check
SERVICE_CHECK_DOCKER=curl --silent --fail example.com
"""
# https://github.com/cablehead/python-consul/blob/53eb41c4760b983aec878ef73e72c11e0af501bb/consul/base.py#L111
# https://www.consul.io/docs/discovery/checks#docker-interval
#
# NOTE: consul agent should be able to access docker socket: -v /var/run/docker.sock:/var/run/docker.sock
script = cls._value(params, 'docker')
if script:
# Invoke *script* packaged within a running docker container with
# *container_id* at a specified *interval* on the configured
# *shell* using the Docker Exec API. Optional *register* after which a
# failing service will be automatically deregistered.
script = script.replace('$SERVICE_IP', service.ip).replace(
'$SERVICE_PORT', str(service.port))
container_id = service.container_id[:12]
shell = cls._value(params, 'shell')
interval, deregister = cls._common_values(params)
ret = Check.docker(container_id,
shell,
script,
interval,
deregister=deregister)
# FIXME: as 2021/01/24, python-consul2 uses old script instead of args
# it was removed in consul 1.1.0
# https://github.com/hashicorp/consul/blob/master/CHANGELOG.md#110-may-11-2018
if cls.consul_version >= (1, 1, 0):
ret['args'] = script.split(" ")
del ret['script']
return cls._post_process(ret, params)
return None
