def chronos(LOG, marathon_address, max_tries=10, try_interval=10):
mesos_zk_address = None
zk_hosts = None
LOG.info("[Chronos]: Attempting deployment...")
result = Utils.consul_service_data(os.environ['SVC_NAME_MESOS_MASTER_ZK'])
if result['ExitCode'] == 0:
consul_data = json.loads(result['StdOut'])
mesos_zk_address = consul_data[0]['ServiceAddress']
else:
LOG.error("[Chronos]: Expected {} service in Consul catalog but found none.".format(os.environ['SVC_NAME_MESOS_MASTER_ZK']))
result = Utils.consul_service_data(os.environ['SVC_NAME_ZOOKEEPER'])
if result['ExitCode'] == 0:
consul_data = json.loads(result['StdOut'])
if str(len(consul_data)) == os.environ['EXPECTED_CONSENSUS_SERVERS']:
zk_hosts = ",".join([ "{}:{}".format(x['ServiceAddress'], x['ServicePort']) for x in consul_data ])
else:
LOG.error("[Chronos]: Expected {} consensus servers but got {}.".format(os.environ['EXPECTED_CONSENSUS_SERVERS'], str(len(consul_data))))
else:
LOG.error("[Chronos]: Expected {} service in Consul catalog but found none.".format(os.environ['SVC_NAME_ZOOKEEPER']))
if mesos_zk_address != None and zk_hosts != None:
current_attempt = 1
while current_attempt <= max_tries:
LOG.info("[Chronos]: Deploying with ZK hosts: {} and Mesos ZK address {}. Attempt {} of {}...".format(
zk_hosts,
mesos_zk_address,
current_attempt,
max_tries))
marathon_app_definition = json.dumps({
"id": "/chronos",
"cpus": 0.1,
"instances": 1,
"mem": 256,
"args": [
"--zk_hosts", zk_hosts,
"--master", mesos_zk_address
],
"portDefinitions": [{
"name": "http-api",
"protocol": "tcp"
},{
"name": "libprocess",
"protocol": "tcp"
}],
"container": {
"type": "DOCKER",
"docker": {
"image": "mesosphere/chronos:v3.0.2",
"network": "HOST",
"forcePullImage": False
}
}
})
result = Utils.deploy_marathon_app(marathon_address, marathon_app_definition)
if result['ExitCode'] == 0:
LOG.info("[Chronos]: Deployed.")
break
else:
LOG.error("[Chronos]: Failed to deploy at attempt {}. Reason: {}".format(current_attempt, result['StdErr']))
current_attempt = current_attempt + 1
time.sleep(try_interval)
else:
LOG.error("[Chronos]: Service dependencies not loaded from Consul.")
