Docker和alpine镜像内国内源配置

修改docker源，使用国内阿里源

$ cat /etc/docker/daemon.json
{
    "registry-mirrors": [
        "https://mirror.ccs.tencentyun.com",
        "http://registry.docker-cn.com",
        "http://docker.mirrors.ustc.edu.cn",
        "http://hub-mirror.c.163.com"
    ],
    "insecure-registries" : [
        "registry.docker-cn.com",
        "docker.mirrors.ustc.edu.cn"
    ],
    "debug" : true,
    "experimental" : true
}

修改好之后重载配置并重启docker

# 重载配置
systemctl daemon-reload
# 重启docker服务
systemctl restart docker

alpine镜像国内源配置（alpine镜像里面）

参考：[alpine]源配置

1. 修改alpine镜像中的默认源地址信息

$ docker run -it alpine
/ # cd /etc/apk/
/etc/apk # sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories
/etc/apk # cat repositories 

2. 修改Dockerfile

修改项目中的Dockerfile，在Dockerfile中的所有 FROM ...alpine... 语句后面添加一句：

RUN set -eux && sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories

上述配置解决了make all时出现的如下问题：

user@user-pc:~/codes/go/src/github.com/hyperledger/fabric$ make all
Building Docker image hyperledger/fabric-ccenv
docker build --force-rm  -f images/ccenv/Dockerfile \
	--build-arg GO_VER=1.14.4 \
	--build-arg ALPINE_VER=3.12 \
	 \
	-t hyperledger/fabric-ccenv ./images/ccenv
Sending build context to Docker daemon  2.048kB
Step 1/8 : ARG GO_VER
Step 2/8 : ARG ALPINE_VER
Step 3/8 : FROM golang:${GO_VER}-alpine${ALPINE_VER}
 ---> 3289bf11c284
Step 4/8 : RUN apk add --no-cache 	g++ 	gcc 	git 	musl-dev
 ---> Running in 0d7440835aee
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz: temporary error (try again later)
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
WARNING: Ignoring http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz: temporary error (try again later)
ERROR: unsatisfiable constraints: