如何将dockernetworking从旧的容器移动到新的容器？

我想升级一个容器的基础镜像，需要将networking从旧版本移到新版本。 所以我从旧容器收集数据，在哪里

networkingconfiguration

creation_data.get('networking_config')如下所示：

 {'EndpointsConfig': {'opt_network_4ba465': {'IPAMConfig': {'IPv4Address': '10.49.0.2'}}}} 

开始旧的容器

 def pop_new_container(data, docker_client=None): container = docker_api.create_container( # todo: use config file image='docker.site.org:5000/coaxis/coaxisopt_daemon:latest', hostname=data.get('hostname'), ports=[80], host_config=docker_api.create_host_config( port_bindings={80: 80}, restart_policy={"MaximumRetryCount": 0, "Name": "always"} ), networking_config=create_network_config(data, docker_client) ) docker_api.start(container=container.get('Id')) return container 

升级

开始新的容器（基于旧的一个数据）。

 def upgrade_daemon_container(old_container_id): old_container_data = docker_api.inspect_container(old_container_id) creation_data = get_upgrade_data(old_container_data) new_container = docker_api.create_container( image=creation_data.get('image'), hostname=creation_data.get('hostname'), volumes=creation_data.get('volumes'), host_config=docker_api.create_host_config( binds=creation_data.get('volumes_bindings'), port_bindings={80: 80}, restart_policy={"MaximumRetryCount": 0, "Name": "always"} ), networking_config=creation_data.get('networking_config'), ) return new_container 

题

检查新容器时，networkingconfiguration不完整：

旧的容器networkingconfiguration

 { "opt_network_823dc9": { "Aliases": [ "2387c3b6b2c2" ], "EndpointID": "f78a2f64d0eef09c8b965f9e53ea25e45ae5fc0ec977015982106d5a3e364de4", "Gateway": "10.49.0.202", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAMConfig": { "IPv4Address": "10.49.0.2" }, "IPAddress": "10.49.0.2", "IPPrefixLen": 16, "IPv6Gateway": "", "Links": null, "MacAddress": "02:42:0a:31:00:02", "NetworkID": "474c3b5faa006bbed65d188143f0f34749f1f9e84b25ee0f9629e35b6f588c8a" } } 

新的容器networkingconfiguration

 { "opt_network_823dc9": { "Aliases": null, "EndpointID": "", "Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAMConfig": { "IPv4Address": "10.49.0.2" }, "IPAddress": "", "IPPrefixLen": 0, "IPv6Gateway": "", "Links": null, "MacAddress": "", "NetworkID": "" } } 

Answer 1

完整的代码和testing在github上

解

 def upgrade_daemon_container(old_container_id): old_container_data = docker_api.inspect_container(old_container_id) creation_data = get_upgrade_data(old_container_data) network_id = creation_data.get('networking_config').get('EndpointsConfig').copy().popitem()[0] docker_api.disconnect_container_from_network(old_container_id, network_id) new_container = docker_api.create_container( image=creation_data.get('image'), hostname=creation_data.get('hostname'), volumes=creation_data.get('volumes'), host_config=docker_api.create_host_config( binds=creation_data.get('volumes_bindings'), port_bindings={80: 80}, restart_policy={"MaximumRetryCount": 0, "Name": "always"} )) docker_api.disconnect_container_from_network(new_container.get('Id'), 'bridge') docker_api.connect_container_to_network(new_container.get('Id'), network_id, ipv4_address=creation_data.get('networking_config').get('IPv4Address')) destroy(old_container_id) docker_api.start(container=new_container.get('Id')) return new_container 

testing

 def purge(self, containers=[]): for container in containers: self.docker_api.stop(container['Id'], 0) for network in self.docker_api.inspect_container(container['Id'])['NetworkSettings']['Networks']: if 'opt_network' in network: self.docker_api.remove_network(network) self.docker_api.remove_container(container['Id']) def test_upgrade_container_pop_new_container(self): config = {'ip': '10.49.0.2', 'subnet': '10.49.0.0/16', 'gateway': '10.49.0.202', 'vlan': 102} container = container_services.pop_new_container(config, self.docker_api) new_container = container_services.upgrade_daemon_container(container.get('Id')) self.assertNotEqual(container.get('Id'), new_container.get('Id')) self.purge([new_container]) def test_upgrade_container_mount_volumes_from_old_to_new_container(self): config = {'ip': '10.49.0.2', 'subnet': '10.49.0.0/16', 'gateway': '10.49.0.202', 'vlan': 102} container = container_services.pop_new_container(config, self.docker_api) old_container_volumes = [volume['Name'] for volume in container_services.get_mounts(container['Id'])] new_container = container_services.upgrade_daemon_container(container.get('Id')) new_container_volumes = [volume['Name'] for volume in container_services.get_mounts(new_container['Id'])] self.assertSetEqual(set(old_container_volumes), set(new_container_volumes)) self.purge([new_container]) def test_upgrade_container_bind_to_old_network(self): config = {'ip': '10.49.0.2', 'subnet': '10.49.0.0/16', 'gateway': '10.49.0.202', 'vlan': 102} container = container_services.pop_new_container(config, self.docker_api) old_name, old_network = container_services.get_networks(container['Id']).popitem() new_container = container_services.upgrade_daemon_container(container.get('Id')) new_name, new_network = container_services.get_networks(new_container['Id']).popitem() self.assertEqual(old_name, new_name) self.assertEqual(old_network['IPAMConfig'], new_network['IPAMConfig']) self.assertEqual(old_network['IPAddress'], new_network['IPAddress']) self.assertEqual(old_network['Gateway'], new_network['Gateway']) self.assertEqual(old_network['MacAddress'], new_network['MacAddress']) self.assertEqual(old_network['NetworkID'], new_network['NetworkID']) self.purge([new_container])