概述
最近在尝试阅读Docker源码，一直想弄明白docker关于namespace等的代码的在哪，以及怎么触发。然而在阅读时发现根本找不到代码。。。想着还是先源码安装下docker，然后边运行边打印些调试信息看看再说
安装之前
Docker源码需在docker容器编译环境中编译，所以先安装docker，安装环境依旧是ubuntu14.04
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D sudo apt-get update sudo apt-get upgrade sudo apt-get install docker-engine
起初是使用apt-get install docker.io安装，但在编译源码的时候会遇到ARG错误。
安装
docker的安装命令很简单，虽然错误很多= =
apt-get install make git golang git clone https://git@github.com/docker/docker cd docker make build make binary
遇到的问题与解决方案
Unknown instruction: ARG
原因：
Docker Hub's automated build is still running Docker 1.8 and doesn't support ARG yet. There is a github issue tracking their upgrade to 1.9.
解决方案：采用安装最新的docker-engine方式
docker daemon启动失败
FATA[0000] Error starting daemon: error initializing graphdriver: "/var/lib/docker" contains several valid graphdrivers: aufs, devicemapper; Please cleanup or explicitly choose storage driver (-s <DRIVER>)
解决方案：移除devicemap文件夹，如 mv /var/lib/docker/devicemapper/ .
make build出错一
Step 6 : RUN apt-get update && apt-get install -y apparmor apt-utils aufs-tools automake bash-completion binutils-mingw-w64 bsdmainutils btrfs-tools build-essential clang createrepo curl dpkg-sig gcc-mingw-w64 git iptables jq libapparmor-dev libcap-dev libltdl-dev libsqlite3-dev libsystemd-journal-dev libtool mercurial net-tools pkg-config python-dev python-mock python-pip python-websocket ubuntu-zfs xfsprogs libzfs-dev tar zip --no-install-recommends && pip install awscli==1.10.15 ---> Running in 32ad02db3575 Get:1 http://ppa.launchpad.net trusty InRelease [15.5 kB] Ign http://httpredir.debian.org jessie InRelease Get:2 http://httpredir.debian.org jessie-updates InRelease [142 kB] Get:3 http://security.debian.org jessie/updates InRelease [63.1 kB] Get:4 http://httpredir.debian.org jessie Release.gpg [2373 B] Get:5 http://ppa.launchpad.net trusty/main amd64 Packages [5150 B] Get:6 http://httpredir.debian.org jessie-updates/main amd64 Packages [17.6 kB] Get:7 http://httpredir.debian.org jessie Release [148 kB] Get:8 http://httpredir.debian.org jessie/main amd64 Packages [9035 kB] Get:9 http://security.debian.org jessie/updates/main amd64 Packages [232 kB] Fetched 9662 kB in 19s (504 kB/s) W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie/main/binary-amd64/Packages Hash Sum mismatch W: Failed to fetch http://security.debian.org/dists/jessie/updates/main/binary-amd64/Packages Hash Sum mismatch E: Some index files failed to download. TheW: Failed to fetch http://httpredir.debian.org/debian/dists/jessie/main/binary-amd64/Packages Hash Sum mismatch
看样子是源的问题哎╮(╯▽╰)╭
而且是RUN指令，应该是dockerfile运行容器之后的源错误，so，看下docker/Dockerfile
# ARG APT_MIRROR=httpredir.debian.org RUN sed -i s/httpredir.debian.org/$APT_MIRROR/g /etc/apt/sources.list
在这里修改了源~从网上重新找个ftp.cn.debian.org，然而，。。。还是错。。。
好吧，那把这两句直接全部注释掉，用163的debian源内容echo到容器里，执行
RUN echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib\ndeb http://mirrors.163.com/debian/ jessie-updates main non-free contrib\ndeb http://mirrors.163.com/debian/ jessie-backports main non-free contrib\ndeb-src http://mirrors.163.com/debian/ jessie main non-free contrib\ndeb-src http://mirrors.163.com/debian/ jessie-updates main non-free contrib\ndeb-src http://mirrors.163.com/debian/ jessie-backports main non-free contrib\ndeb http://mirrors.163.com/debian-security/ jessie/updates main non-free contrib\ndeb-src http://mirrors.163.com/debian-security/ jessie/updates main non-free contrib" | tee /etc/apt/sources.list
再执行make build，出现依赖问题，那就用aptitude吧
RUN apt-get update && apt-get install -y aptitude RUN aptitude install -y \
（同时去掉–no-install-recommends\那一行）
make build出错二
Step 15 : RUN set -x && export SECCOMP_PATH="$(mktemp -d)" && curl -fsSL "https://github.com/seccomp/libseccomp/releases/download/v${SECCOMP_VERSION}/libseccomp-${SECCOMP_VERSION}.tar.gz" | tar -xzC "$SECCOMP_PATH" --strip-components=1 && ( cd "$SECCOMP_PATH" && ./configure --prefix=/usr/local && make && make install && ldconfig ) && rm -rf "$SECCOMP_PATH"
---> Running in 4ad66d28289d
+ mktemp -d
+ export SECCOMP_PATH=/tmp/tmp.TWPYfciRjC
+ curl -fsSL https://github.com/seccomp/libseccomp/releases/download/v2.3.1/libseccomp-2.3.1.tar.gz
+ tar -xzC /tmp/tmp.TWPYfciRjC --strip-components=1
curl: (56) SSL read: error:00000000:lib(0):func(0):reason(0), errno 104
gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
网络问题，网上有说先下载下来再用ADD添加进去，结果发现校园网貌似访问这挺快的，连上vpn再执行就行了。。
make binary 出错
ERROR：/usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: fork/exec /usr/bin/gcc: cannot allocate memory
内存不足~增大虚拟机内存呗
安装结果
make build
make binary
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
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