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  • docker二进制代码编译

    docker二进制代码编译流程

    docker如何编译,在 官网 进行了介绍。

    其实很简单,就是在docker源码中有一个makefile文件,执行make,就可以进行编译了。

    我们从源码来看一下make的过程。

    首先看一下Makefile。

    ...
    DOCKER_MOUNT := $(if $(BINDDIR),-v "$(CURDIR)/$(BINDDIR):/go/src/github.com/docker/docker/$(BINDDIR)")
    DOCKER_RUN_DOCKER := docker run --rm -it --privileged -e TIMEOUT -e BUILDFLAGS -e TESTFLAGS -e TESTDIRS -e DOCKER_GRAPHDRIVER -e DOCKER_EXECDRIVER $(DOCKER_MOUNT) "$(DOCKER_IMAGE)"
    ...
    binary: build
       $(DOCKER_RUN_DOCKER) hack/make.sh binary
    ...
    build: bundles
    docker build -t "$(DOCKER_IMAGE)" .
    ...
    bundles:
       mkdir bundles
    

    执行make binary。会首先创建bundles文件夹,然后执行docker build,通过dockerfile创建镜像(这一步其实可以直接从官网pull镜像而不用自己build,下面详细讲)。然后将容器run起来,通过-v参数,将容器中的bundles同物理机的该路径下的bundles文件夹绑定起来,然后启动容器。容器执行了hack/dind命令,编译docker,将编译好的文件放在了bundles中。从而在物理机上也可见。

    对于docker的二进制代码编译采取了一种极为dockerful的方式。因为搭建docker的编译环境可能会较为繁琐,docker直接提供给了一个 docker-dev 的镜像给用户。获得这个镜像有两种方式,一种是直接下载。用户只需要下载这个镜像,就可以在这个镜像中进行docker的二进制代码的编译了。另一种,就是使用Dockerfile进行进行build,来获取镜像。Dockerfile文件就在docker源码的根目录下。这种方式比较耗时,不推荐。

    有了docker-dev镜像,其实不必每次都要docker build镜像,而只需要利用原有镜像就可以了。那么我修改了Makefile文件,从而可以支持能够使用docker-dev镜像进行编译。更新后的Makefile在末尾附带。

    在我的里面支持了多种方式来灵活使用本地环境:

    通过build方式
    make DOCKER_COMMAND=build
    
    通过pull方式(默认,pull与本版本相同的docker-dev镜像)
    make
    
    通过pull方式,指定本地镜像(不再pull镜像)
    make DOCKER_IMAGE=docker-dev:v1.2
    

    其他编译方法

    另外一种方法,就是把你的代码上传到github上。

    然后在 https://registry.hub.docker.com 上面,注册,选择自己的github项目,进行自动编译。

    这种方式真心慢,没个半小时弄不出来(实测是20min),虽然是官方推荐。但是我感觉这更像是给他们自己做的一种硬广告。。。

    Makefile

    .PHONY: all binary build cross default docs docs-build docs-shell shell test test-unit test-integration test-integration-cli test-docker-py validate
    
    # env vars passed through directly to Docker's build scripts
    # to allow things like `make DOCKER_CLIENTONLY=1 binary` easily
    # `docs/sources/contributing/devenvironment.md ` and `project/PACKAGERS.md` have some limited documentation of some of these
    DOCKER_ENVS := 
       -e BUILDFLAGS 
       -e DOCKER_CLIENTONLY 
       -e DOCKER_EXECDRIVER 
       -e DOCKER_GRAPHDRIVER 
       -e TESTDIRS 
       -e TESTFLAGS 
       -e TIMEOUT
    # note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
    
    # to allow pull docker-dev image from registry.hub.docker.com and avoid building every time
    # allow `make DOCKER_COMMAND=build` to build image from Dockerfile
    DOCKER_COMMAND := pull
    
    DOCKER_VERSION := $(shell cat VERSION)
    
    # to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
    # (default to no bind mount if DOCKER_HOST is set)
    # note: BINDDIR is supported for backwards-compatibility here
    BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
    
    DOCKER_BUILD_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
    DOCKER_PULL_MOUNT := -v "$(CURDIR):/go/src/github.com/docker/docker"
    
    # to allow `make DOCSDIR=docs docs-shell` (to create a bind mount in docs)
    DOCS_MOUNT := $(if $(DOCSDIR),-v $(CURDIR)/$(DOCSDIR):/$(DOCSDIR))
    
    # to allow `make DOCSPORT=9000 docs`
    DOCSPORT := 8000
    
    GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
    
    # to allow you miss .git directory
    DOCKER_ENVS += $(if $(GIT_BRANCH),,-e DOCKER_GITCOMMIT=$(DOCKER_VERSION))
    
    DOCKER_BUILD_IMAGE := docker$(if $(GIT_BRANCH),:$(GIT_BRANCH))
    DOCKER_PULL_IMAGE := docker-dev:$(if $(DOCKER_VERSION),$(DOCKER_VERSION))
    
    # to allow `make DOCKER_IMAGE=docker-dev:v1.2`(to use some other image if needed)
    ifeq ($(DOCKER_COMMAND),pull)
       DOCKER_IMAGE := $(DOCKER_PULL_IMAGE)
       DOCKER_MOUNT := $(DOCKER_PULL_MOUNT)
    else
       DOCKER_IMAGE := $(DOCKER_BUILD_IMAGE)
       DOCKER_MOUNT := $(DOCKER_BUILD_MOUNT)
    endif
    
    DOCKER_DOCS_IMAGE := docker-docs$(if $(GIT_BRANCH),:$(GIT_BRANCH))
    
    DOCKER_RUN_DOCKER := docker run --rm -it --privileged $(DOCKER_ENVS) $(DOCKER_MOUNT) "$(DOCKER_IMAGE)"
    
    DOCKER_RUN_DOCS := docker run --rm -it $(DOCS_MOUNT) -e AWS_S3_BUCKET -e NOCACHE
    
    # for some docs workarounds (see below in "docs-build" target)
    GITCOMMIT := $(shell git rev-parse --short HEAD 2>/dev/null)
    
    default: binary
    
    all: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh
    
    binary: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh binary
    
    cross: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh binary cross
    
    docs: docs-build
       $(DOCKER_RUN_DOCS) -p $(if $(DOCSPORT),$(DOCSPORT):)8000 "$(DOCKER_DOCS_IMAGE)" mkdocs serve
    
    docs-shell: docs-build
       $(DOCKER_RUN_DOCS) -p $(if $(DOCSPORT),$(DOCSPORT):)8000 "$(DOCKER_DOCS_IMAGE)" bash
    
    docs-release: docs-build
       $(DOCKER_RUN_DOCS) -e OPTIONS -e BUILD_ROOT -e DISTRIBUTION_ID 
          -v $(CURDIR)/docs/awsconfig:/docs/awsconfig 
          "$(DOCKER_DOCS_IMAGE)" ./release.sh
    
    docs-test: docs-build
       $(DOCKER_RUN_DOCS) "$(DOCKER_DOCS_IMAGE)" ./test.sh
    
    test: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh binary cross test-unit test-integration test-integration-cli test-docker-py
    
    test-unit: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh test-unit
    
    test-integration: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh test-integration
    
    test-integration-cli: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh binary test-integration-cli
    
    test-docker-py: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh binary test-docker-py
    
    validate: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) hack/make.sh validate-gofmt validate-dco validate-toml
    
    shell: $(DOCKER_COMMAND)
       $(DOCKER_RUN_DOCKER) bash
    
    pull:
       docker pull "$(DOCKER_IMAGE)"
    
    build: bundles
       docker build -t "$(DOCKER_IMAGE)" .
    
    docs-build:
       git fetch https://github.com/docker/docker.git docs && git diff --name-status FETCH_HEAD...HEAD -- docs > docs/changed-files
       cp ./VERSION docs/VERSION
       echo "$(GIT_BRANCH)" > docs/GIT_BRANCH
    #  echo "$(AWS_S3_BUCKET)" > docs/AWS_S3_BUCKET
       echo "$(GITCOMMIT)" > docs/GITCOMMIT
       docker build -t "$(DOCKER_DOCS_IMAGE)" docs
    
    bundles:
       mkdir bundles
    

    将Makefile拷贝到自己的docker工程中即可。





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  • 原文地址:https://www.cnblogs.com/ToBeSmart/p/4311297.html
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