def list_available_images(self, node_name):
"""List the images available on the specified node."""
host_conf = None
for conf in self.docker_config:
if conf.name == node_name:
host_conf = conf
break
if host_conf is None:
log.error('Unknown node {}, returning empty image list'.format(
node_name))
return []
my_engine = DockerClient(host_conf)
image_list = []
for dk_image in my_engine.list_images():
image = {
'id': dk_image.attrs['Id'],
'size': dk_image.attrs['Size'],
'names': dk_image.tags
}
for name in image['names']:
if name[-7:] == ':latest': # add an image with the name without 'latest' to fake Docker image lookup algorithm
image['names'].append(name[:-7])
break
image_list.append(image)
return image_list
def _host_subthread(self, host_config: DockerHostConfig):
log.info("Synchro thread for host {} started".format(host_config.name))
self.host_stats[host_config.name] = NodeStats(host_config.name)
while True:
time_start = time.time()
try:
my_engine = DockerClient(host_config)
container_list = my_engine.list(
only_label={
'zoe_deployment_name': get_conf().deployment_name
})
info = my_engine.info()
except ZoeException as e:
self.host_stats[host_config.name].status = 'offline'
log.error(str(e))
log.info('Node {} is offline'.format(host_config.name))
else:
if self.host_stats[host_config.name].status == 'offline':
log.info('Node {} is now online'.format(host_config.name))
self.host_stats[host_config.name].status = 'online'
self.host_stats[
host_config.name].container_count = info['Containers']
self.host_stats[host_config.name].cores_total = info['NCPU']
self.host_stats[
host_config.name].memory_total = info['MemTotal']
self.host_stats[host_config.name].labels = host_config.labels
if info['Labels'] is not None:
self.host_stats[host_config.name].labels.union(
set(info['Labels']))
self.host_stats[host_config.name].memory_allocated = sum([
cont['memory_soft_limit'] for cont in container_list
if cont['memory_soft_limit'] != info['MemTotal']
])
self.host_stats[host_config.name].cores_allocated = sum([
cont['cpu_quota'] / cont['cpu_period']
for cont in container_list if cont['cpu_period'] != 0
])
stats = {}
self.host_stats[host_config.name].memory_reserved = 0
self.host_stats[host_config.name].cores_reserved = 0
for cont in container_list:
service = self.state.services.select(
only_one=True,
backend_host=host_config.name,
backend_id=cont['id'])
if service is None:
log.warning(
'Container {} on host {} has no corresponding service'
.format(cont['name'], host_config.name))
if cont['state'] == Service.BACKEND_DIE_STATUS:
log.warning(
'Terminating dead and orphan container {}'.
format(cont['name']))
my_engine.terminate_container(cont['id'],
delete=True)
continue
self._update_service_status(service, cont)
self.host_stats[
host_config.
name].memory_reserved += service.resource_reservation.memory.min
self.host_stats[
host_config.
name].cores_reserved += service.resource_reservation.cores.min
stats[service.id] = {
'core_limit': cont['cpu_quota'] / cont['cpu_period'],
'mem_limit': cont['memory_soft_limit']
}
self.host_stats[host_config.name].service_stats = stats
self.host_stats[host_config.name].images = []
for dk_image in my_engine.list_images():
image = {
'id': dk_image.attrs['Id'],
'size': dk_image.attrs['Size'],
'names': dk_image.tags # type: list
}
for name in image['names']:
if name[-7:] == ':latest': # add an image with the name without 'latest' to fake Docker image lookup algorithm
image['names'].append(name[:-7])
break
self.host_stats[host_config.name].images.append(image)
sleep_time = CHECK_INTERVAL - (time.time() - time_start)
if sleep_time <= 0:
log.warning(
'synchro thread for host {} is late by {:.2f} seconds'.
format(host_config.name, sleep_time * -1))
sleep_time = 0
if self.stop.wait(timeout=sleep_time):
break
log.info("Synchro thread for host {} stopped".format(host_config.name))
