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#MAC OS DOCKER COMPOSE USE ALL CPU FOR MAC#
#MAC OS DOCKER COMPOSE USE ALL CPU CODE#

Since both operating systems are vastly different than Linux under the hood, virtualization was the only feasible way to get things working. As it proved out its utility, it was eventually ported to macOS and Windows. the container doesn't get updated with Host OS changes, and it needs restartingĭocker was mainly built with Linux in mind. Additional orchestration needed to spin your containers up and down.More docker resources consumed due to additional parallel containers.Modify your docker-sync.yml according to your dev setup.It is, in effect, another abstraction layer to speed up the process. Drastically reduces CPU on hot/live reloadsĪn alternative that's been on the scene for several years now is called docker-sync.ĭocker-sync is essentially a container running in parallel with your own containers whose job is to efficiently let your container know when files change.Minimal setup - use docker-compose and docker files as normal.In the Docker UI, go to Resources => File Sharing and specify what folders you want mounted to Docker containers.

#MAC OS DOCKER COMPOSE USE ALL CPU FOR MAC#

You won't have to worry about the details though, as they package it as part of the Docker for Mac Edge build. At the very least, the jet plane taking off might only happen every once in a while versus all the time.Īs of this date, Docker has a blessed approach for minimizing resource consumption on disk changes using something under the hood called Mutagen. The options below will get you closer to parity with the experience on Linux. While it is true that Docker on Linux is the architecture as intended (and therefore is the best experience), simply switching is not tenable for most folks. This is the part where many would tell you to "just develop on Linux". All that synchronizing work between these layers is not trivial! This is also why you see the Hyperkit process usually consuming much of your CPU even at idle. The jet plane taking off when you do a docker-compose up on macOS? It's your Host OS' resources hard at work to synchronize low-level I/O (specifically disk and network) between the Host OS and Containers this is on top of having to run the Containers themselves.

#MAC OS DOCKER COMPOSE USE ALL CPU CODE#

A copy or reference to the host OS source code.

Some kind of hot or live reloading mechanism when code changes.

Developer tooling (IDE's, text editors, linters, etc).

Your typical Docker development setup is usually as follows: Whereas Docker for Linux essentially has a direct line to the Host OS (and, by extension, the disk, network, GPU, etc), Docker for macOS has to go through several abstractions to do low-level tasks. It then can only access the kernel of that VM, which then has to go through the steps above to synchronize the disks of your Containers and the Host OS. Now, while it may be called Docker for macOS, it is architecturally different than Docker on Linux.Īs you can see above, instead of accessing the Host OS directly, Docker for macOS instead has to spin up its own Linux VM.

Have the Hypervisor synchronize changes between both.

Mount the disk from the Host OS on the Hypervisor.

For example, in order for a VM to read/write from your Host OS hard drive, it has to: VM's run an additional operating system on top of your Host Operating System, as well as an additional abstraction layer (called the Hypervisor) for the "Guest OS" to talk to the Host OS. Work as if you were directly on the Host OS.it has direct access to the disk on the Host OS thanks to the kernel) Mount the disk on the Container natively (i.e.For example, in order for a Container to read/write from your Host OS hard drive, it has to: The difference comes in how this occurs.Īs you can see above, Containers make use of your Host OS and its kernel, and therefore are "closer to the iron". Generically speaking, both are similar in that you're running "computers inside your computer". Why is Docker for Mac a quantifiably worse experience than running Docker on a Linux machine? We'll explore the reasons in this post.įirst, a word on container architecture and how it differs from your standard Virtual Machine (VM). However, their counterpart developers on Linux simply go 🤷🏻‍♂️ and develop with no such problems. We've all heard the jokes from practically anyone with their development environments on Docker for Mac: it makes your Mac sound like a jet plane at takeoff.