def remove_instance_from_cluster(image_id):
global server_pointer
ip = available_nodes[server_pointer].get_ip()
#if the choosen node is not local, send a request to the chosen node to remove an instance with the image_id
if ip != "localhost":
url = 'http://' + ip + ':5001' + '/remove'
form_data = {'image_id' : image_id}
params = urllib.urlencode(form_data)
response = urllib2.urlopen(url, params)
result = json.load(response)
#update the main load balancer to remove the container from the chosen instance
main_lb_ip = docker.get_ip_by_name(main_lb_image_label)
removed = True
lb_port = result['lb_port']
container_id = result['container_id']
update_main_load_balancer(image_id, ip, str(lb_port))
else:
#if the chosen node is the local node, remove an instance with with the image_id straight from docker
removables = docker.get_instance_ids_by_id(image_id)
removed = docker.rm('-f', removables[-1])
#update main load balancer to remove the container from the chosen instance
lb_port = _add_load_balancer(image_id, port)
update_main_load_balancer(image_id, "127.0.0.1", str(lb_port))
#update the server pointer to the previous server. If it goes down to zero, set it to the last one on the list.
_remove_container_from_record(image_id, container_id)
server_pointer -= 1
if server_pointer == 0:
server_pointer = len(available_nodes) - 1
def remove_image(image_id):
global server_pointer
ip = available_nodes[server_pointer].get_ip()
#if the choosen node is not local, send a request to the chosen node to remove an instance with the image_id
if ip != "localhost":
url = 'http://' + ip + ':5001' + '/remove_image'
form_data = {'image_id' : image_id}
params = urllib.urlencode(form_data)
response = urllib2.urlopen(url, params)
result = json.load(response)
else:
#if the chosen node is the local node, remove an instance with with the image_id straight from docker
removables = docker.get_instance_ids_by_id(image_id)
for index, removable in enumerate(removables):
removed = [docker.rm('-f', removables[index])]
#update main load balancer to remove the container from the chosen instance
lb_port = _add_load_balancer(image_id, None)
update_main_load_balancer(image_id, "127.0.0.1", str(lb_port))
#update the server pointer to the previous server. If it goes down to zero, set it to the last one on the list.
for removable in removables:
_remove_container_from_record(image_id, removable)
server_pointer -= 1
if server_pointer == 0:
server_pointer = len(available_nodes) - 1
success_containers = docker.rmi(image_id)
success_load_balancer = docker.rmi(haproxy_prefix + image_id)
success_volume = docker.remove_volume(image_id)
success_network = docker.remove_network(image_id)
merger.remove_app_data(image_id)
success = success_containers and success_load_balancer and success_volume and success_network
return str(success) + '\n', 200
def get_cpu_stats(cluster_id):
available_nodes = app.get_available_nodes()
stats_dict = {}
stats_lines = []
#GETTING DOCKER CPU STATS FROM ALL INSTANCES IN ALL NODES
for node in available_nodes:
if node.get_ip() != "localhost":
url = 'http://' + node.get_ip() + ":5001/cpu_stats/" + cluster_id
node_stats_table = urllib2.urlopen(url).read()
node_stats_lines = node_stats_table.split('\n')
stats_dict.update(stats_string_to_dict(node_stats_lines))
else:
node_stats_table = docker.stats_cpu()
node_stats_lines = node_stats_table.split('\n')
#TURNING STATS STRING LINES INTO {INSTANCE_ID -> CPU_STAT} DICTIONARY
all_stats_dict = stats_string_to_dict(node_stats_lines)
cluster_instances_ids = docker.get_instance_ids_by_id(cluster_id)
#REMOVING STATS FROM INSTANCES THAT ARE NOT FROM THE DESIRED CLUSTER
for key in all_stats_dict:
if key in cluster_instances_ids:
stats_dict[key] = all_stats_dict[key]
print "[INFO] current instances for " + cluster_id + " are: " + str(
stats_dict)
stats = stats_dict.values()
index = 0
#REMOVING PERCENTAGE CHARACTER FROM CPU STATS VALUES AND TURNING THEM INTO INTS
for stat in stats:
stat = stat[:-2]
stat = float(stat)
stats[index] = stat
index += 1
return stats
def get_cpu_stats(image_id):
# image_id = request.form['image_id']
ancestor_image_instances_ids = docker.get_instance_ids_by_id(image_id)
cluster_instances_ids = []
for instance in ancestor_image_instances_ids:
if docker.get_image(instance).strip('\n').strip('"') == image_id:
cluster_instances_ids.append(instance)
stats = docker.stats_cpu()
stats_list = stats.split('\n')
match_lines = []
for cluster_instance in cluster_instances_ids:
for stats_line in stats_list:
if cluster_instance in stats_line:
match_lines.append(stats_line)
match_stats = '\n'.join(match_lines)
print "[DEBUG] image_id stats are " + match_stats
print "[DEBUG] current_port is " + str(current_port)
return match_stats