The containers logging driver.The typical first reaction that you get when using this is “it runs my Docker stack without sounding like a plane taking off?”.It’s a pretty amazing piece of engineering, and in many ways, I think that the ARM architecture is the future. As well as a good selection of connections, including an SD card reader as well as the usual Thunderbolt 3 and USB-A ports, the Corsair TBT100 boasts two HDMI ports, enabling you to connect dual 4K displays at 60Hz with full HDR support.When an application in a Docker container emits logs, they are sent to the applications stdout and stderr output streams. If the messages are harmless, you can pipe the output of the command from.So I’ve been using my new M1-based MacBook Pro for a couple of months for a mix of development, email, and other things an open-source maintainer does day-to-day.The well-featured Corsair TBT100 Thunderbolt 3 Dock is just the thing if you have a pair of 4K HDMI monitors that you'd love to hook up to your MacBook Pro. Client: Docker Engine - Community Cloud integration: 1.0.2 Version: 19.03.13 API version: 1.40 Go version: go1.13.15 Git commit: 4484c46d9d Built: Wed Sep 16 16:58:31 2020 OS/Arch: darwin/amd64Docker Desktop for Mac: Inside the container, any mounted files/folders will. And output is different, it always missing last step (CMD) Using on macos catalina with zsh.
Docker Output Software I NeedI found that if an ARM-native version is not available for an application, the emulated one works just fine and there’s no performance drawback that I can notice. CompatibilityAll the software I need to use “just works”. This is why I think ARM is the future, even if it might take a decade for the mainstream cloud to migrate over.My Xeon Linux-based workstation suddenly feels old. It also means longer battery cycles for non-cloud use-cases (less waste, more bang for the buck).![]() 1.16 RC adds support for building darwin/arm64 binaries. ✅ Earthly ( v0.5.1+ now supports M1 natively - just brew install earthly/earthly/earthly)I should also mention that during the first few weeks I had some issues with audio skips when using Bluetooth, but an OS update fixed it (just like Apple promised).I also use a ✅ YubiKey 5C Nano and a bunch of random peripherals like a ✅ USB microphone and a ✅ dock plugged into Ethernet.Languages and frameworks I’ve tested - most of them in Docker containers: ✅ Brew (native, encountered some issues with git, but was able to fix them) (A month or two ago Kubernetes wasn’t working, but now it is!). ![]() ✅ Cobol (yes, really) works fine on native architecture in Docker. ✅ Ruby and Ruby on Rails works fine on native architecture in Docker. ✅ Python works fine on native architecture in Docker. ✅ JavaScript / Node works fine on native architecture in Docker. ✅ gRPC works fine on native architecture in Docker. ✅ Elixir works fine on native architecture in Docker. It’ll say either X86_64, arm64 (Mac) or aarch64 (Linux). Activity Monitor showing Zoom as an Apple process Activity Monitor showing Spotify as an Intel processIf you’re not sure about the terminal you’re using, you can type uname -m. Here’s how I can tell that Zoom is an ARM process, while Spotify is an X86_64 process. If it says Intel, it’s X86_64. Rosetta 2 is that good.The easiest way to tell the difference is by opening Activity Monitor and looking at the Architecture column: if it says Apple, it’s ARM. Minimal testing though.How to Tell What Architecture a Program Is Running AsIt’s extremely easy to mistake the kind of architecture you run as. Easy: xcode-select -install. Using brew doctor I was able to find out that Xcode needed a (re)install. This is pure speculation, however, I’ve not researched this.(In any case, a very impressive effort to switch architecture so quickly for a project that hosts so many packages!)Back to fixing the issue now. Not sure what the cause of this is, but it could be the fact that brew has been adding native arm support for many packages in the last few months and it’s possible that this migration resulted in some inconsistencies. Terminal showing the output of uname -m as arm64 Brew IssuesOne issue I encountered on both my M1 laptop and also a MacStadium MacMini instance that we use for Mac testing is that Brew randomly started to complain about git missing. Mac shell documentation for pointing to where the java binaries areInstead, I was able to just remove the brew git via brew uninstall git and simply rely on git from Xcode, which seems to work just fine. I was not as comfortable doing that on my laptop after having installed so much via casks. On the MacStadium instance, I was able to just uninstall brew and reinstall it and everything was fine. Your mileage may vary, however, if you are curling some binary that may need to switch from X86_64 to aarch64 in its URL, or if you’re doing lower-level stuff. If you’re building an image, by default it’ll use your native architecture to execute the build (arm64) and most things will magically just work. Most official images are now supported on arm64 too. Making use of multi-platform images seems daunting at first, but really it’s actually pretty simple.The Docker for Mac app comes packed with QEMU out of the box - so Docker is able to run either arm64 and amd64 images. Using VS CodeNative support for Apple Silicon is not yet available in the generally available VS Code version, but running the amd64 emulated version works pretty well. Or at least that’s what claims](). However, if you run your natively-supported Docker-in-Docker, the inner Docker can still run multi-platform images fine.There are currently performance issues with multi-processor use - so much so that performance using a single core is sometimes slightly better than the performance of using 8 cores. So you cannot run an arm64 Docker in an amd64 Docker or vice-versa. You can also specify platform: linux/amd64 for the service definition in docker-compose.yml if you’d like to be specific.One thing to note is that Docker-in-Docker is not supported by QEMU ( abandoned PR on GitHub). This is relatively rare, however - most Docker builds just work across either platform. The rest will run natively. This is in Beta, so if you end up giving this a try - we’d appreciate any feedback you can give us via GitHub issues or in our Slack.One useful Earthly trick I’ve used a lot is that if one part of your build has not yet been ported to amd64, you can simply mark it as -platform=linux/amd64 - and thus only that part will execute on amd64. Using EarthlyWe’ve added support for Apple M1 in Earthly and so far it’s working wonderfully. After some head-scratching the issue was resolved by switching to the ARM-based VS Code Insiders edition. In some situations, this led to some strange issues when running Docker, where QEMU was acting up with segmentation faults.
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