Local and metropolitan area networks: Media Access Control (MAC) Bridges.When I tried, I found out that somehow the gcs client library is trying to make a request to the gcs emulator using IPv6 and failing because IPv6 is not supported by docker for mac.I’ve implemented the following answer to correct IPv4, but it still seems to be trying to make requests via IPv6.How can I make a successful request to the gcs emulator from python in a docker-compose network?I have confirmed that requests from a local Python script to gcs emulator without docker-compose are successful.Referenced answer: Force requests to use IPv4 / IPv6Sample implementation: from google.cloud import storageFrom google.api_core.client_options import ClientOptionsFrom google.auth.credentials import AnonymousCredentialsFrom multijob_sample import variables as vsDef getaddrinfoIPv4(host, port, family=0, type=0, proto=0, flags=0):Return orig_getaddrinfo(host=host, port=port, family=socket.AF_INET, type=type, proto=proto, flags=flags)Patcher = patch('socket.getaddrinfo', side_effect=getaddrinfoIPv4)Urllib3.exceptions.InsecureRequestWarning) # disable https warnings for https insecure certsClient_options=ClientOptions(api_endpoint=' _http=http_ssl_disabled,Def put_file(bucket_id: str, file, blobname: str):Client.get_bucket(bucket_id).blob(blob_name=blobname).upload_from_file(file)Print(f'trace: ')Put_file("bucketid", file, "blobname") # do put_fileError message: run | running patched getaddrinfoRun | error: HTTPSConnectionPool(host='::', port=4443): Max retries exceeded with url: /upload/resumable/efbbcde9c49cda2ff78e8da24371ea03 (Caused by NewConnectionError(': Failed to establish a new connection: Address family for hostname not supported'))Run | trace: Traceback (most recent call last):Run | File "/usr/local/lib/python3.9/site-packages/urllib3/connection.py", line 169, in _new_connRun | conn = connection.create_connection(Run | File "/usr/local/lib/python3.9/site-packages/urllib3/util/connection.py", line 73, in create_connectionRun | for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):Run | File "/usr/local/lib/python3.9/unittest/mock.py", line 1093, in _call_Run | return self._mock_call(*args, **kwargs)Run | File "/usr/local/lib/python3.9/unittest/mock.py", line 1097, in _mock_callRun | return self._execute_mock_call(*args, **kwargs)Run | File "/usr/local/lib/python3.9/unittest/mock.py", line 1158, in _execute_mock_callRun | File "/app/multijob_sample/storage.py", line 26, in getaddrinfoIPv4Run | return orig_getaddrinfo(host=host, port=port, family=socket.AF_INET, type=type, proto=proto, flags=flags)Run | File "/usr/local/lib/python3.9/socket.py", line 954, in getaddrinfoRun | for res in _socket.getaddrinfo(host, port, family, type, proto, flags):Run | socket. Docker uses network bridge for all traffic, and by default containers will be using bridge named docker0. However if you are using docker-compose , which by default creates own bridge for each configuration or you have other ways to configure docker networking the bridge you would like to capture would be different.Another way to look at this is that layer 2 switches can only deal with MAC addresses and layer 3 devices can deal with IP addresses.
Docker Bridge0 Mac Will ShipThe fact that the new Docker for Mac will ship with Mutagen def shows me that they hear us and are doing whatever they can to alleviate the situation.I’m trying to make a request from a python application to a gcs emulator in the docker-compose bridge network in docker for mac.Package your microservices with Docker containers and GraalVM native image. With the Mac/OSX native image, and GraalVM CE with the Docker native-image.Note this is different from How to expose a service running inside a docker container, bound to localhost, which can be addressed in multiple ways in Docker for Linux, say through -net host or even -v to bind my Linux-flavor client in etc. My problem is specific for Docker for Mac, so it's not as straightforward.Why Gitlab? Similar to chef-server, Gitlab uses many services behind the scenes, and can start colliding with other services on standard ports. The first service I wanted to containerize was Gitlab. Beginning DockerAfter testing the basics, I ended up wanting to docker something useful. The beautiful part of exposing an actual ip address is we can use normal DNS to have these containers look like different servers.There are some old instructions on this, but docker has come a long way, and it is much easier now than some of the complicated setups I saw people discussing back in 2013. What I really want to do is put up generic environment walls so that my application stack is happy, but not so separate that it hurts my wallet. Best photo printer for mac osI’m also pretty sure I rebooted at this point to test the bridge. So, I was excited to learn that the NetworkManager CLI does everything I’d ever want it to do now! # nmcli con add type bridge ifname br0# nmcli con add type bridge-slave ifname enp3s0 master bridge-br0I also end up editing the br0 to specify an exact MAC address so my DHCP->static ipaddress mapping works the way I want. The problem with that is sometimes they aren’t ready and I forget to go check them back out when they have been updated. # docker pull busyboxCheck what you have pulled already # docker imagesREPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEDocker.io/gitlab/gitlab-ce latest 0251581ae8b0 7 days ago 1.225 GBDocker.io/fedora latest ded7cd95e059 9 weeks ago 186.5 MBDocker.io/busybox latest 8c2e06607696 3 months ago 2.43 MBRun something # docker run -i -t fedora /]# lsBin dev home lib64 media opt root sbin sys usrBoot etc lib lost+found mnt proc run srv tmp varCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES898aa7d5f394 fedora:latest "/bin/bash" 4 minutes ago Exited (0) 4 minutes agoStart an old container, and reattach if interactive # docker start 898aa7d5f394# docker /]# exit Preparing our bridged networkingI’m always trying out new tools. Intro testing encourages downloading busybox or fedora. So, I was quite excite that the amazing people at Gitlab already did the hard part! Before I continue, my top docker commands:First, you’ll need to download an image. ![]()
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