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 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_id = request.form['image_id']
removables = docker.get_instances_ids_by_id(image_id)
container_id = docker.rm('-f', removables[-1])
if container_id:
lb_port = update_load_balancer(image_id)
return jsonify({'lb_port': lb_port, 'container_id': container_id})
else:
return "[ERROR] Container Could not be removed. Check your parameters"
def _remove_current_load_balancer(load_balancer_instance, image_id):
docker.stop(load_balancer_instance)
docker.rm(load_balancer_instance)
docker.rmi(haproxy_prefix + image_id)
def remove_instance(container_id):
docker.stop(container_id)
success = docker.rm(container_id)
return str(success) + '\n', 200