Manualy build arm elf docker image from scratch, run on X86 through qemu-arm-static/user mode

本文链接：https://blog.youkuaiyun.com/hushui/article/details/103908710

1. Build qemu static link user mode Refer to https://blog.youkuaiyun.com/hushui/article/details/103806109

lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ file qemu-aarch64
qemu-aarch64: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, for GNU/Linux 2.6.32, BuildID[sha1]=5b5ace3ac4f01e93e5ca6a695cbc8bb29669a53a, not stripped
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$

2. ARM hello static link or system call refer to https://raw.githubusercontent.com/docker-library/hello-world/master/hello.c

lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm/build$ export PATH=~/opt/gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu/bin:$PATH
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm/build$ aarch64-linux-gnu-gcc --static -o hello hello.c
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm/build$ file hello
hello: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, for GNU/Linux 3.7.0, BuildID[sha1]=6c28f8fea781c9f640372fe4d04a0ce6f037ff92, not stripped
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm/build$ cd ..

lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ ls
Dockerfile build hello qemu-aarch64 readme.txt
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ ls -l
total 14860
-rw-r--r-- 1 jhula sudo 74 Jan 9 22:57 Dockerfile
drwxr-xr-x 2 jhula sudo 4096 Jan 9 23:00 build
lrwxrwxrwx 1 jhula sudo 11 Dec 9 23:48 hello -> build/hello
-rwxr-xr-x 1 jhula sudo 15200568 Jan 9 22:55 qemu-aarch64
-rw-r--r-- 1 jhula sudo 2940 Dec 10 01:02 readme.txt
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ ls -l
total 14860
-rw-r--r-- 1 jhula sudo 74 Jan 9 22:57 Dockerfile
drwxr-xr-x 2 jhula sudo 4096 Jan 9 23:03 build
lrwxrwxrwx 1 jhula sudo 11 Dec 9 23:48 hello -> build/hello
-rwxr-xr-x 1 jhula sudo 15200568 Jan 9 22:55 qemu-aarch64
-rw-r--r-- 1 jhula sudo 2940 Dec 10 01:02 readme.txt

3. local test

lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ ./qemu-aarch64 ./build/hello
Hello

### Build Docker ARM ELF
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ cat Dockerfile
FROM scratch
ADD hello /
ADD qemu-aarch64 /
CMD ["/qemu-aarch64","/hello"]
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ docker build -t hello-arm .
Sending build context to Docker daemon 20.09MB
Step 1/4 : FROM scratch
--->
Step 2/4 : ADD hello /
---> Using cache
---> 419d850f28ac
Step 3/4 : ADD qemu-aarch64 /
---> Using cache
---> 797d466b2135
Step 4/4 : CMD ["/qemu-aarch64","/hello"]
---> Running in 919a8de0284f
Removing intermediate container 919a8de0284f
---> 37a6f5e5f93e
Successfully built 37a6f5e5f93e
Successfully tagged hello-arm:latest
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$ docker ps -a |grep hello-arm
a9d28398f720 hello-arm "/qemu-aarch64 /hello" 2 minutes ago Exited (0) 2 minutes ago pensive_babbage
lake@localhost:~/local/example-code/test-linux-docker-lake/myhello-arm$