def start(self):
zkOper = Common_ZkOpers()
existCluster = zkOper.existCluster()
if not existCluster:
raise UserVisiableException("Nginx componentCluster does't exist")
total_nginx_nodes = zkOper.retrieve_nginx_node_list()
started_nodes = zkOper.retrieve_started_nodes()
if len(total_nginx_nodes) == len(started_nodes):
raise UserVisiableException(
"all nginx nodes have started. No need to start them.")
logging.info("all nginx nodes: %s" % (total_nginx_nodes))
to_start_nginx_nodes = list(
set(total_nginx_nodes) - set(started_nodes))
logging.info("nginx needed to start: " + str(to_start_nginx_nodes))
node_infos = []
for node in to_start_nginx_nodes:
info = zkOper.retrieve_nginx_node_info(node)
node_infos.append(info)
self.baseOpers(node_infos, OperType.start)
result_dict = {
'message': 'cluster start processing, please wait for a moment!'
}
return result_dict
def retrieve_cluster_started_status(self):
zkOper = Common_ZkOpers()
started_nodes = zkOper.retrieve_started_nodes()
total_nodes = zkOper.retrieve_nginx_node_list()
started_nodes_count = len(started_nodes)
total_nodes_count = len(total_nodes)
if started_nodes_count == total_nodes_count:
return ClusterStatus.STARTED
elif 0 != started_nodes_count:
return ClusterStatus.STARTED_PART
else:
return ClusterStatus.STOP
def stop(self):
zkOper = Common_ZkOpers()
node_infos = []
started_nodes_list = zkOper.retrieve_started_nodes()
if not started_nodes_list:
raise UserVisiableException(
'cluster has been stopped, no need to do this!')
for nginx_node in started_nodes_list:
info = zkOper.retrieve_nginx_node_info(nginx_node)
node_infos.append(info)
self.baseOpers(node_infos, OperType.stop)
result_dict = {
'message': 'cluster stop processing, please wait for a moment!'
}
return result_dict