dty63504 2016-03-29 08:34
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Go编译的二进制文件不会在Ubuntu主机上的高山Docker容器中运行

Given a binary, compiled with Go using GOOS=linux and GOARCH=amd64, deployed to a docker container based on alpine:3.3, the binary will not run if the docker engine host is Ubuntu (15.10):

sh: /bin/artisan: not found

This same binary (compiled for the same OS and arch) will run just fine if the docker engine host is busybox (which is the base for alpine) deployed within a VirtualBox VM on Mac OS X.

This same binary will also run perfectly fine if the container is based on one of Ubuntu images.

Any idea what this binary is missing?

This is what I've done to reproduce (successful run in VirtualBox/busybox on OS X not shown):

Build (building explicitly with flags even though the arch matches):

➜  artisan git:(master) ✗ GOOS=linux GOARCH=amd64 go build

Check it can run on the host:

➜  artisan git:(master) ✗ ./artisan 
10:14:04.925 [ERROR] artisan: need a command, one of server, provision or build 

Copy to docker dir, build, run:

➜  artisan git:(master) ✗ cp artisan docker/build/bin/        
➜  artisan git:(master) ✗ cd docker 
➜  docker git:(master) ✗ cat Dockerfile 
FROM docker:1.10
COPY build/ /
➜  docker git:(master) ✗ docker build -t artisan .
Sending build context to Docker daemon 10.15 MB
Step 1 : FROM docker:1.10
...
➜  docker git:(master) ✗ docker run -it artisan sh
/ # /bin/artisan 
sh: /bin/artisan: not found

Now changing the image base to phusion/baseimage:

➜  docker git:(master) ✗ cat Dockerfile 
#FROM docker:1.10
FROM phusion/baseimage
COPY build/ /
➜  docker git:(master) ✗ docker build -t artisan .
Sending build context to Docker daemon 10.15 MB
Step 1 : FROM phusion/baseimage
...
➜  docker git:(master) ✗ docker run -it artisan sh
# /bin/artisan
08:16:39.424 [ERROR] artisan: need a command, one of server, provision or build 
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3条回答 默认 最新

  • dongxiao0449 2016-03-30 12:09
    关注

    By default, if using the net package a build will likely produce a binary with some dynamic linking, e.g. to libc. You can inspect dynamically vs. statically link by viewing the result of ldd output.bin

    There are two solutions I've come across:

    • Disable CGO, via CGO_ENABLED=0
    • Force the use of the Go implementation of net dependencies, netgo via go build -tags netgo -a -v, this is implemented for a certain platforms

    From https://golang.org/doc/go1.2:

    The net package requires cgo by default because the host operating system must in general mediate network call setup. On some systems, though, it is possible to use the network without cgo, and useful to do so, for instance to avoid dynamic linking. The new build tag netgo (off by default) allows the construction of a net package in pure Go on those systems where it is possible.

    The above assumes that the only CGO dependency is the standard library's net package.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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