简介
通过maven插件，结合maven命令，实现打包、生成镜像、推送到仓库中心功能。
1、开启Docker daemon服务远程访问
修改配置
- [x] 修改 /etc/docker/daemon.json 文件，没有就创建，文件内容如下：
{
"hosts": [
"tcp://0.0.0.0:2376",
"unix:///var/run/docker.sock"
],
"insecure-registries" : ["172.16.1.146"]
}
重启docker
sudo systemctl daemon-reload
sudo systemctl restart docker
验证
[root@localhost ~]# docker -H 172.16.1.191:2376 images
REPOSITORY TAG IMAGE ID CREATED SIZE
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713171831 063b60635335 25 minutes ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713171646 3b8deedff90d 27 minutes ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713091144 aa898d0cbd28 32 minutes ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-2018071308 a91e9e3b0678 About an hour ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713083134 a91e9e3b0678 About an hour ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713080550 db286edbbc18 About an hour ago 727 MB
2、MAVEN配置
此处根据dockerfile生成镜像，
pom.xml中添加插件。
插件git地址：https://github.com/spotify/dockerfile-maven
org.codehaus.mojo
build-helper-maven-plugin
1.9.1
timestamp-property
timestamp-property
current.time
yyyyMMddHHmmss
GMT+8
com.spotify
dockerfile-maven-plugin
1.4.0
default
install
build
push
registry
******
172.16.1.146/wondertek/${project.artifactId}
${project.version}-${current.time}
target/docker-test-1.0.0.jar
3、dockerfile配置
官网说明：https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
# 拉取基础镜像
FROM hub.c.163.com/library/java:8-jdk
# 镜像的作者
MAINTAINER [email protected]
#挂载目录，通过 VOLUME 指令创建的挂载点，无法指定主机上对应的目录，是自动生成的
VOLUME ["/data1","/data2"]
RUN ["mkdir", "-p", "/app"]
#结合maven插件dockerfile-maven-plugin的打包使用
ARG JAR_FILE
ADD ${JAR_FILE} /app/app.jar
#为后面的 RUN, CMD, ENTRYPOINT, ADD 或 COPY 指令设置镜像中的当前工作目录。
#WORKDIR /usr/local/docker/test
#拷贝当前目录文件到容器/app
#COPY . /app
#与 COPY 类似，从 build context 复制文件到镜像。不同的是，如果 src 是归档文件（tar, zip, tgz, xz 等），文件会被自动解压到 dest。
#ADD src dest
#设置环境变量，环境变量可被后面的指令使用
ENV EVN_SET_TEST "WELCOME TO DOCKERFILE CONTAINER！"
##################
# RUN、CDM、ENTRYPOINT 命令都包含两种格式：Shell 格式和 Exec 格式
# CMD还可以放在ENTRYPOINT后，为其传递参数。
##### shell 格式：######
## 底层会调用 /bin/sh -c
# 在容器中运行指定的命令
RUN echo $EVN_SET_TEST
# 容器启动命令 只有最后一个生效，CMD 可以被 docker run 之后的参数替换。
#只有最后一个生效
CMD echo "CMD Hello world"
#配置容器启动时运行的命令
ENTRYPOINT echo "ENTRYPOINT Hello, $EVN_SET_TEST"
###### Exec 格式： #####
## 当指令执行时，会直接调用 ，不会被 shell 解析
# ENTRYPOINT ["/bin/echo", "Hello, $EVN_SET_TEST"]
# 正确写法应该为：
# ENTRYPOINT ["/bin/sh", "-c", "echo Hello, $EVN_SET_TEST"]
# 为Exec 格式的ENTRYPOINT传递参数，结果输出Hello, $EVN_SET_TEST dockerfile world
# CMD ["dockerfile world"]
#只有最后一个生效
ENTRYPOINT ["java","-jar","/app/app.jar"]
#表示哪个端口提供服务的提示，宿主机如果要访问，需要结合-P参数联合使用。
EXPOSE 8080
4、build publish镜像
配置远程docker环境变量
export DOCKER_HOST=tcp://172.16.1.191:2376
windows直接在环境变量中添加。
mvn命令执行
build镜像：
mvn clean package dockerfile:build -DskipTests
注意：
Image will be built as xxxxx这一步会比较慢，需要将文件上传到服务器上(等待时间取决于文件大小和上传速度)
发布到镜像中心，注意，该命令不会build镜像。
mvn dockerfile:push
配置中 build 和 publish 都绑定在install周期上。
如果不想触发相关流程，可以添加相关例外参数。
mvn clean install -Ddockerfile.skip
| 命令 | 说明 |
|---|---|
| dockerfile.skip | Disables the entire dockerfile plugin; all goals become no-ops. |
| dockerfile.build.skip | Disables the build goal; it becomes a no-op. |
| dockerfile.tag.skip | Disables the tag goal; it becomes a no-op. |
| dockerfile.push.skip | Disables the push goal; it becomes a no-op. |
也可以取消pom.xml中executions的配置，通过 mvn clean install dockerfile:build dockerfile:push -DskipTests 构建并且推送到注册中心
远程镜像查看：
[root@localhost log]# docker -H 172.16.1.191:2376 images
REPOSITORY TAG IMAGE ID CREATED SIZE
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713171831 063b60635335 2 days ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713171646 3b8deedff90d 2 days ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713091144 aa898d0cbd28 2 days ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-2018071308 a91e9e3b0678 2 days ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713083134 a91e9e3b0678 2 days ago 727 MB
172.16.1.146:8888/wondertek/docker-test 1.0.0-20180713080550 db286edbbc18 2 days ago 727 MB
127.0.0.1:5200/docker-test 1.0.0-20180705042837 1e5b41afb0a1 10 days ago 727 MB
dockerlocal/docker-test 1.0.0 7d1c3e14aede 10 days ago 643 MB
docker.io/postgres 10-alpine e273e6bfba1c 2 weeks ago 39.5 MB
镜像历史层级查看:
--no-trunc 查看完整的命令
[root@localhost log]# docker history 172.16.1.146:8888/wondertek/docker-test:1.0.0-20180716100040 --no-trunc
IMAGE CREATED CREATED BY SIZE COMMENT
sha256:c4cf1fc7cae80b238d46b5741834140c3188e45ba929c92cd1e35145c38a7bc1 40 minutes ago /bin/sh -c #(nop) EXPOSE 8080/tcp 0 B
sha256:539db240ca1f6ec8b260e1af3ffa0a12a160b49d470644090bb9bfc26729b53e 40 minutes ago /bin/sh -c #(nop) ENTRYPOINT ["java" "-jar" "./app.jar"] 0 B
sha256:cccad169f4dfa5b3fd6e2df754b10ae5f45541aa7d4964da4f60557643ac5796 40 minutes ago /bin/sh -c #(nop) ENTRYPOINT ["/bin/sh" "-c" "echo \"ENTRYPOINT Hello, $EVN_SET_TEST\""] 0 B
sha256:e16f9ebbab1b040da6332b0fd5f0e36066219b8793fad42d1f23e8d7dbd6a412 40 minutes ago /bin/sh -c #(nop) CMD ["/bin/sh" "-c" "echo \"CMD Hello world\""] 0 B
sha256:d06785ad2059e9718e3c5a6c0334d34027232efe719dcc94b0d391ce2fad650b 40 minutes ago |1 JAR_FILE=target/docker-test-1.0.0.jar /bin/sh -c echo $EVN_SET_TEST 0 B
sha256:2517b2a4980975b64f648b6a9104255f13db0cc409aaa72fa66dbfe61d6e4e96 40 minutes ago /bin/sh -c #(nop) ENV EVN_SET_TEST=WELCOME TO DOCKERFILE CONTAINER！ 0 B
sha256:7daa3e4150f810e727993d1ddc99debe6c0c397e91f02ffd7dd65abe8e1b7171 40 minutes ago /bin/sh -c #(nop) ADD file:be73bf23e734c61fa90ae97fe0b66384632a30fa3f9c967b1afa127a2f52c198 in /app/app.jar 83.6 MB
sha256:d42fa5d86ebf2508a9e3de305e04ac3e66dc8e7791c127487161a00ecd2ee710 40 minutes ago /bin/sh -c #(nop) ARG JAR_FILE 0 B
sha256:7b0922396475e204d624772921470e94b7348f52d7ceb8717d4b38871387c303 40 minutes ago /bin/sh -c #(nop) VOLUME [/data1 /data2] 0 B
sha256:beb6d7c2897188c448f6e33a91cbc7110aac171cc5556663e01bbd806e9fb10f 40 minutes ago /bin/sh -c #(nop) MAINTAINER [email protected] 0 B
sha256:a001fc27db5aae61800c78fa1c794177f07e5422525ded583ff2ccde6f6107bc 19 months ago /bin/sh -c /var/lib/dpkg/info/ca-certificates-java.postinst configure 418 kB
19 months ago /bin/sh -c set -x && apt-get update && apt-get install -y openjdk-8-jdk="$JAVA_DEBIAN_VERSION" ca-certificates-java="$CA_CERTIFICATES_JAVA_VERSION" && rm -rf /var/lib/apt/lists/* && [ "$JAVA_HOME" = "$(docker-java-home)" ] 352 MB
19 months ago /bin/sh -c #(nop) ENV CA_CERTIFICATES_JAVA_VERSION=20140324 0 B
19 months ago /bin/sh -c #(nop) ENV JAVA_DEBIAN_VERSION=8u111-b14-2~bpo8+1 0 B
19 months ago /bin/sh -c #(nop) ENV JAVA_VERSION=8u111 0 B
19 months ago /bin/sh -c #(nop) ENV JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 0 B
19 months ago /bin/sh -c { echo '#!/bin/sh'; echo 'set -e'; echo; echo 'dirname "$(dirname "$(readlink -f "$(which javac || which java)")")"'; } > /usr/local/bin/docker-java-home && chmod +x /usr/local/bin/docker-java-home 87 B
19 months ago /bin/sh -c #(nop) ENV LANG=C.UTF-8 0 B
19 months ago /bin/sh -c echo 'deb http://deb.debian.org/debian jessie-backports main' > /etc/apt/sources.list.d/jessie-backports.list 55 B
19 months ago /bin/sh -c apt-get update && apt-get install -y --no-install-recommends bzip2 unzip xz-utils && rm -rf /var/lib/apt/lists/* 1.29 MB
19 months ago /bin/sh -c apt-get update && apt-get install -y --no-install-recommends bzr git mercurial openssh-client subversion procps && rm -rf /var/lib/apt/lists/* 123 MB
19 months ago /bin/sh -c apt-get update && apt-get install -y --no-install-recommends ca-certificates curl wget && rm -rf /var/lib/apt/lists/* 44.3 MB
19 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0 B
19 months ago /bin/sh -c #(nop) ADD file:1d214d2782eaccc743b8d683ccecf2f87f12a0ecdfbcd6fdf4943ce616f23870 in / 123 MB
私有镜像中心查看，这里使用的是前面介绍的harbor：
image