#Dokev platform download

I'm building for TARGETPLATFORM=linux/386, TARGETARCH=386, TARGETVARIANT= So when I use docker buildx build -platform, what do I see inside the BuildKit environment? TARGETARCH is to general, and ARGETVARIANT may be blank (in the case of arm64). Those to help the situation, but as you can see below, the arm/v6 vs arm/v7 vs arm/v8 output can make all this TARGETPLATFORM is actually the combo of TARGETOS/ TARGETARCH/ TARGETVARIANT so in some cases you could use We'll still need to convert that output to what our RUN commands need. We can use BuildKit with the TARGETPLATFORM argument to get a more consistent environment variable in our If we wanted to have a single Dockerfile build across (at minimum) x86-64, ARM 64-Bit, and ARM 32-Bit, Recommended approach for curl and wget commands in multi-platform Dockerfiles But BuildKit seems to do additional conversion, as you'll see in the testing below. x86_64 amd64 # all modern Intel-compatible x84 64-Bit architectures i386 386 # older Intel 32-Bit architecture, originally used in the 386 processor armel arm/v6 # 32-bit v6 architecture. Used in Raspberry Pi 3 and Pi 4 when 32bit Raspbian Linux is used

Used on Apple M1, AWS Graviton, and Raspberry Pi 3's and 4's aarch64 arm64 # the latest v8 arm architecture. This is similar to (but not exactly) what ARG TARGETPLATFORM gives us: There's also the complexity that a device might have one architecture hardware (arm64) but run a different kernel (arm/v7 32-Bit). In older arm devices it'll say armv71 even though you For example, withĪrm64 (v8) architecture, it might say arm64, or aarch64. Using uname -m won't work for all architectures, as the name changes based on where it's running. No one seems to agree on common file naming.

#Dokev platform download

Trying to download pre-built binaries of various tools and dependencies (GitHub, etc.) that don't useĪ package manager (apt, yum, brew, apk, etc.).ĭownload URLs are inconsistently named, and expect some sort of kernel and architecture combo in the file name. This problem rears its ugly head when you're There are still inconsistencies we need to deal with. The problem with downloading binaries in Dockerfiles See the docs onĪnd the automatic platform ARGs. Turns out this might be harder then you're expecting.ĭocker has BuildKit which makes this much easier with the docker buildx build -platform option, andĬombined with the ARG TARGETPLATFORM gets us much closer to our goal. Goal: In Docker, our goal should be a single Dockerfile that can build for multiple Linux architectures.Ī stretch-goal might be cross-OS (Windows Containers), but for now let's focus on the Linux kernel. Having a consistent OS (kernel) and architecture naming scheme for building is harder. Docker -platform translation example for TARGETPLATFORM