def docker_exe(self):
"""
Return the docker executable to use, using the service configuration
docker_exe as the first choice, and a docker.io or docker exe found
in PATH as a fallback.
"""
if capabilities.has("node.x.docker.io"):
return "docker.io"
if capabilities.has("node.x.docker"):
return "docker"
raise ex.InitError("docker executable not found")
def check_stat(self):
if not capabilities.has("node.x.stat"):
return True
if self.device is None:
return True
proc = subprocess.Popen(['stat', self.device],
stderr=subprocess.PIPE,
stdout=subprocess.PIPE)
for retry in range(self.stat_timeout*10, 0, -1):
if proc.poll() is None:
time.sleep(0.1)
else:
return True
try:
proc.kill()
except OSError:
pass
return False
def dockerd_exe(self):
if capabilities.has("node.x.dockerd"):
return "dockerd"
else:
raise ex.InitError("dockerd executable not found")
def has_capability(self, cap):
return capabilities.has("drivers.resource.%s" % cap)