[HN Gopher] Docker on MacOS is slow and how to fix it
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Docker on MacOS is slow and how to fix it
Author : riccardomc
Score : 46 points
Date : 2022-12-22 20:42 UTC (2 hours ago)
(HTM) web link (www.paolomainardi.com)
(TXT) w3m dump (www.paolomainardi.com)
| EdwardDiego wrote:
| My preferred fix: don't develop in Docker.
| sieabahlpark wrote:
| Have fun managing osx and Linux dependencies then when you
| could just maintain one.
| notwokeno wrote:
| When I used to use a mac I just put all my "Linux" (GNU
| really) dependencies in a prefix and that worked pretty well.
| Docker is kind of overkill for what people use it for IMO.
| dhritzkiv wrote:
| I used to be on the side of relying on native tools/libs,
| and managing them in a similar way to what you to describe,
| but it all became too much to handle, with dependencies
| across projects breaking with regularity.
|
| Maybe I wasn't doing it right, but switching to Docker to
| sequester my projects and their dependencies has saved me
| so much time and hassle, especially with the amount of
| repos I work on throughout the year.
|
| My biggest weakness today is that I still don't reach for
| Docker right away when starting work on a new project or
| when evaluating a new tool. Old habits...
| [deleted]
| thunky wrote:
| My preferred fix: don't develop in Mac.
| hakanderyal wrote:
| I finally gave up the effects of Docker on performance and
| battery life and switched to Windows. I still don't have a long
| lasting battery, but at least performance is better.
| rad_gruchalski wrote:
| I have been working in a Citrix workspace Windows machine for
| the past 6 months with a Ubuntu 20 wsl2. I was very much
| anxious of the experience before onboarding but I have to say,
| I barely deal with the Windows side of things. Having said
| that, if I was to move away from mac, I'd just go directly to
| Linux.
| therealmarv wrote:
| Is not this the main way to speed up Docker on Mac: use a beefed
| up Linux Virtual Machine (VirtualBox, UTM, tart) and run Docker
| inside this Virtual Machine?
| dijit wrote:
| the 'DOCKER_HOST' variable (and the fact that all SDK's seem to
| support it) is honestly the greatest bloody thing in the entire
| ecosystem.
|
| My workflow for the past 3 years with Docker has been: set up
| some desktop machine somewhere, configure docker, configure ssh
| like normal: set DOCKER_HOST=ssh://<tailscale_ip> on my laptop.
|
| Docker responds as if it's local, but I get _absurd_ build
| /fetch speedup (since the wired connection is faster than Wifi)
| and it's not running inside a slow VM.
|
| Recently I've been using colima on my Mac natively, but I keep
| reaching for the DOCKER_HOST option.
| acchow wrote:
| This assumes you want a distinct storage drive within your VM.
|
| Many developers prefer to code in their host OS but run the
| image via Docker for Mac. They also want instant real-time code
| changes to appear inside the running Docker image. I suppose
| you could have some of the disk live within the VM and the code
| portions be memory mapped or Rsynced. I haven't thought through
| the downsides.
| rootusrootus wrote:
| Funny thing is that I switched from virtualbox for Vagrant on OSX
| over to Docker because vbox file operations were so incredibly
| slow.
| doctoboggan wrote:
| What sort of workloads are people doing where the filesystem
| access is limiting them? I develop python web apps on a mac and
| use dockerized postgres and a dockerized flask app. I don't seem
| to experience any noticeable issues. When I am developing I mount
| the source code directory as a volume so code edits are synced
| live into the running docker container.
|
| I also develop frontends using vue, managed by npm. In my
| experience this doesnt need to be dockerized since npm installs
| everything in a subdirectory per project. Is there a benefit to
| running this as a dockerized app?
| taf2 wrote:
| nginx is pretty unusable via docker - I guess file system cache
| is the issue...
| osrec wrote:
| You can turn caching off, I believe.
| jeffrom wrote:
| Workloads with a lot of files, for example a large elixir web
| app with hot reload / fswatch enabled, have upwards of 20
| second page load time. More than enough to mess up my flow.
| pmontra wrote:
| A customer's Mac with a M1 is only 50% faster than my Intel
| laptop from 2014 at running Rails tests, because they run in a
| docker container: 50s vs 75s. The difference between the two
| machines should be much more than that (CPU, RAM, data bus,
| etc.)
| xtracto wrote:
| Magento in docker on Mac is horrible for this reason.
| a_t48 wrote:
| I work on a _large_ C++ codebase on Linux. If I'm on my main
| (Linux) machine, things are fine, bind mounts are okay. If I'm
| stuck on my MacBook then compilation performance is...bad. I
| suspect it's due to heavy filesystem access from the compiler
| (reading source, writing object files, etc). At some point I
| need to confirm this by copying in my source directory.
| zeta0134 wrote:
| One issue I ran into at my previous employer was pylint on a
| large Python codebase. Pylint is slow on the best of days, but
| the difference on an M1 Mac running under docker (to
| standardize the version and settings across the team) was
| something like 10x as slow; several *minutes* to lint the
| codebase, which we absolutely required before code could be
| checked in. It finally got a lot better when VirtioFS came out,
| which, when enabled on an arm64 image, sped up filesystem
| access dramatically; suddenly my lints were taking seconds
| again.
| _-____-_ wrote:
| [dead]
| [deleted]
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(page generated 2022-12-22 23:00 UTC)