制作 Docker 镜像
目录
1 docker镜像介绍
1.1 docker的镜像结构
1.2 镜像运行的基本原理
1.3 镜像获得方式
2 构建 docker 镜像 Dockerfile
2.1 Dockerfile 基础参数介绍
2.2 实现参数功能示例
2.2.1 FROM LABEL COPY
2.2.2 ADD
2.2.3 ENV 和 CMD与ENTRYPOINT
2.2.3.1 CMD的替代性
2.2.3.2 ENTRYPOINT的不可替代性
2.2.4 EXPOSE：端口暴露
2.2.5 VOLUME：指定容器的目录将他挂载到宿主机上
2.3 使用Dockerfile构建nginx镜像
2.3.1 系统更换网络源
2.3.2 编写Dockerfile镜像文件
2.3.3 镜像优化示例
1 docker镜像介绍
1.1 docker的镜像结构
- 共享宿主机的kernel
- base镜像提供的是最小的Linux发行版
- 同一docker主机支持运行多种Linux发行版
- 采用分层结构的最大好处是：共享资源
1.2 镜像运行的基本原理
- Copy-on-Write 可写容器层
- 容器层以下所有镜像层都是只读的
- docker从上往下依次查找文件
- 容器层保存镜像变化的部分，并不会对镜像本身进行任何修改
- 一个镜像最多127层
1.3 镜像获得方式
- 基本镜像通常由软件官方提供
- 企业镜像可以用官方镜像+Dockerfile来生成
- 系统关于镜像的获取动作有两种：
docker pull 镜像地址docker load -i 本地镜像包
2 构建 docker 镜像 Dockerfile
2.1 Dockerfile 基础参数介绍
| 指令 | 描述 |
|---|---|
| FROM | 指定基础镜像，例如：FROM busybox:version |
| COPY | 复制文件，例如：COPY file /file 或者 COPY ["file","/"] |
| MAINTAINER | 指定作者信息，例如邮箱：MAINTAINER user@example.com在最新版的Docker中用LABEL KEY="VALUE"代替 |
| ADD | 功能和COPY相似，指定压缩文件或url， 例如：ADD test.tar /mnt 或者 ADD http://ip/test.tar /mnt |
| ENV | 指定环境变量，例如：ENV FILENAME test |
| EXPOSE | 暴露容器端口，例如：EXPOSE 80 |
| VOLUME | 声明数据卷，通常指数据挂载点，例如：VOLUME ["/var/www/html"] |
| WORKDIR | 切换路径，例如：WORKDIR /mnt |
| RUN | 在容器中运行的指令，例如：touch file |
| CMD | 在启动容器时自动运行的动作，可以被覆盖， 例如：CMD echo FILENAME会调用shell解析 例如：CMD["/bin/sh","−c","echoFILENAME"] 不调用shell解析 |
| ENTRYPOINT | 和CMD功能和用法类似，但动作不可被覆盖 |
2.2 实现参数功能示例
2.2.1 FROM LABEL COPY
[root@rockynode-1 dockerfile]# vim Dockerfile
FROM busybox:latest
LABEL mail = shuyan@123
COPY shuyan /[root@rockynode-1 dockerfile]# docker build -t shuyan_copy:v1 .
[+] Building 0.1s (7/7) FINISHED docker:default=> [internal] load build definition from Dockerf 0.0s=> => transferring dockerfile: 155B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" 0.0s=> [internal] load metadata for docker.io/librar 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [internal] load build context 0.0s=> => transferring context: 87B 0.0s=> [1/2] FROM docker.io/library/busybox:latest 0.0s=> [2/2] COPY shuyan / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:9185f618183ab1a307bfb 0.0s=> => naming to docker.io/library/shuyan_copy:v1 0.0s1 warning found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)使用 ctrl+pq 不删除 镜像退出[root@rockynode-1 dockerfile]# docker history shuyan_copy:v1
IMAGE CREATED CREATED BY SIZE COMMENT
9185f618183a 5 minutes ago COPY shuyan / # buildkit 0B buildkit.dockerfile.v0
<missing> 5 minutes ago LABEL mail== shuyan@123 0B buildkit.dockerfile.v0
<missing> 15 months ago BusyBox 1.36.1 (glibc), Debian 12 4.26MB [root@rockynode-1 dockerfile]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c7d1405cc637 shuyan_copy:v1 "sh" 2 minutes ago Up 2 minutes test
[root@rockynode-1 dockerfile]# docker rm -f test
test2.2.2 ADD
[root@rockynode-1 dockerfile]# touch shuyanfile{1..3}
[root@rockynode-1 dockerfile]# tar zcf shuyanflie.tar.gz shuyanfile*
[root@rockynode-1 dockerfile]#
FROM busybox:latest
LABEL mail = shuyan@123
COPY shuyan /
ADD shuyanflie.tar.gz /[root@rockynode-1 dockerfile]# docker build -t shuyan_add:v1 .
[+] Building 0.1s (8/8) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 179B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy 0.0s=> [internal] load metadata for docker.io/library/busybox:latest 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [1/3] FROM docker.io/library/busybox:latest 0.0s=> [internal] load build context 0.0s=> => transferring context: 332B 0.0s=> CACHED [2/3] COPY shuyan / 0.0s=> [3/3] ADD shuyanflie.tar.gz / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:3c20eac277664d5e3d2c02efbfda238748c1cd52dfb89ab26141431 0.0s=> => naming to docker.io/library/shuyan_add:v1 0.0s1 warning found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)
[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
shuyan_add v1 3c20eac27766 23 seconds ago 4.26MB
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MB
[root@rockynode-1 dockerfile]# docker run -it --name test shuyan_add:v1
/ # ls
bin home proc shuyanfile1 sys var
dev lib root shuyanfile2 tmp
etc lib64 shuyan shuyanfile3 usr[root@rockynode-1 dockerfile]# docker rm -f test
test2.2.3 ENV 和 CMD与ENTRYPOINT
FROM busybox:latest
LABEL mail = shuyan@123
COPY shuyan /
ADD shuyanflie.tar.gz /
ENV NAME shuyan # 设置变量
CMD echo $NAME # 打印变量[root@rockynode-1 dockerfile]# docker build -t shuyan_env_cmd .
[+] Building 0.1s (8/8) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 210B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy 0.0s=> WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "E 0.0s=> WARN: JSONArgsRecommended: JSON arguments recommended for CMD to prevent uninte 0.0s=> [internal] load metadata for docker.io/library/busybox:latest 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [1/3] FROM docker.io/library/busybox:latest 0.0s=> [internal] load build context 0.0s=> => transferring context: 182B 0.0s=> CACHED [2/3] COPY shuyan / 0.0s=> CACHED [3/3] ADD shuyanflie.tar.gz / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:74952b428aa082102f25e0d25f84016907e7cb6845187dc671b7088 0.0s=> => naming to docker.io/library/shuyan_env_cmd 0.0s3 warnings found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)- LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 5)- JSONArgsRecommended: JSON arguments recommended for CMD to prevent unintended behavior related to OS signals (line 6)[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
shuyan_env_cmd latest 74952b428aa0 6 minutes ago 4.26MB
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MBdockerfile]# docker run -it --rm --name test shuyan_env_cmd:latest
shuyan # 直接输出[root@rockynode-1 dockerfile]# docker rmi shuyan_env_cmd:latest 2.2.3.1 CMD的替代性
[root@rockynode-1 dockerfile]# docker build -t shuyan_cmd .
[+] Building 0.1s (8/8) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 252B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy 0.0s=> WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "E 0.0s=> [internal] load metadata for docker.io/library/busybox:latest 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [1/3] FROM docker.io/library/busybox:latest 0.0s=> [internal] load build context 0.0s=> => transferring context: 182B 0.0s=> CACHED [2/3] COPY shuyan / 0.0s=> CACHED [3/3] ADD shuyanflie.tar.gz / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:6c75da7d6a03a1e2b0d6caab10eb5e0d97186a17c2091ab3ed28618 0.0s=> => naming to docker.io/library/shuyan_cmd 0.0s2 warnings found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)- LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 5)
dockerfile]# docker run -it --name test --rm shuyan_cmd:latest
shuyan
[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
shuyan_cmd latest 6c75da7d6a03 24 minutes ago 4.26MB
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MB[root@rockynode-1 dockerfile]# docker rmi shuyan_cmd:latest
Untagged: shuyan_cmd:latest
Deleted: sha256:6c75da7d6a03a1e2b0d6caab10eb5e0d97186a17c2091ab3ed2861888d1a5979
[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MB[root@rockynode-1 dockerfile]# docker build -t shuyan_cmd:v1 .
[+] Building 0.1s (8/8) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 252B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy 0.0s=> WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "E 0.0s=> [internal] load metadata for docker.io/library/busybox:latest 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [1/3] FROM docker.io/library/busybox:latest 0.0s=> [internal] load build context 0.0s=> => transferring context: 182B 0.0s=> CACHED [2/3] COPY shuyan / 0.0s=> CACHED [3/3] ADD shuyanflie.tar.gz / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:6c75da7d6a03a1e2b0d6caab10eb5e0d97186a17c2091ab3ed28618 0.0s=> => naming to docker.io/library/shuyan_cmd:v1 0.0s2 warnings found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)- LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 5)
发现使用cmd 的会被 shell 替代
dockerfile]# docker run -it --name test --rm shuyan_cmd:v1 sh
/ # exit[root@rockynode-1 dockerfile]# docker rmi shuyan_cmd:v1
Untagged: shuyan_cmd:v1
Deleted: sha256:6c75da7d6a03a1e2b0d6caab10eb5e0d97186a17c2091ab3ed2861888d1a59792.2.3.2 ENTRYPOINT的不可替代性
[root@rockynode-1 dockerfile]# vim Dockerfile
FROM busybox:latest
LABEL mail = shuyan@123
COPY shuyan /
ADD shuyanflie.tar.gz /
ENV NAME shuyan
#CMD echo $NAME
#CMD ["/bin/sh","-c","/bin/echo $NAME"]
ENTRYPOINT ["/bin/sh","-c","/bin/echo $NAME"] # 不可被替代[root@rockynode-1 dockerfile]# docker build -t shuyan_ent:v1 .
[+] Building 0.1s (8/8) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 299B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy 0.0s=> WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "E 0.0s=> [internal] load metadata for docker.io/library/busybox:latest 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [1/3] FROM docker.io/library/busybox:latest 0.0s=> [internal] load build context 0.0s=> => transferring context: 182B 0.0s=> CACHED [2/3] COPY shuyan / 0.0s=> CACHED [3/3] ADD shuyanflie.tar.gz / 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:c93e8d613c2ec68595594ce0455e67bdbd12b83190ca31c598bcdb2 0.0s=> => naming to docker.io/library/shuyan_ent:v1 0.0s2 warnings found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)- LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 5)[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
shuyan_ent v1 c93e8d613c2e 29 minutes ago 4.26MB
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MBdockerfile]# docker run --name test --rm -it shuyan_ent:v1
shuyan
dockerfile]# docker run --name test --rm -it shuyan_ent:v1 sh
shuyan2.2.4 EXPOSE：端口暴露
[root@rockynode-1 _data]# vim /root/dockerfile/Dockerfile
FROM busybox
MAINTAINER shuyan@com
EXPOSE 80 443 # 暴露80与443端口
[root@rockynode-1 dockerfile]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2c53843b7bb4 busybox:v3 "sh" 4 minutes ago Up 4 minutes 80/tcp, 443/tcp test2.2.5 VOLUME：指定容器的目录将他挂载到宿主机上
[root@rockynode-1 _data]# vim /root/dockerfile/Dockerfile FROM busybox
MAINTAINER shuyan@com
EXPOSE 80 443
VOLUME /var/www/html # 将容器这个目录内的东西挂载到宿主机
WORKDIR /var/www/html # 进入容器内马上切换到的目录
[root@rockynode-1 dockerfile]# docker run -it --name=test busybox:v2
/var/www/html # ls
/var/www/html # touch 1 2 3 4 5 6 7
/var/www/html # ls
1 2 3 4 5 6 7
/var/www/html # [root@rockynode-1 dockerfile]#
[root@rockynode-1 dockerfile]# docker inspect test | grep Moun -A 6--"Mounts": [{"Type": "volume","Name": "d52249eddca8aaf9027c73b8b9051ca68f49c782b44b16b71598ba27f73a3706","Source": "/var/lib/docker/volumes/d52249eddca8aaf9027c73b8b9051ca68f49c782b44b16b71598ba27f73a3706/_data","Destination": "/var/www/html","Driver": "local",
[root@rockynode-1 dockerfile]# ls /var/lib/docker/volumes/d52249eddca8aaf9027c73b8b9051ca68f49c782b44b16b71598ba27f73a3706/_data
1 2 3 4 5 6 7
2.3 使用Dockerfile构建nginx镜像
使用centos镜像制作NGINX镜像
2.3.1 系统更换网络源
由于在centos7的国内镜像已经过期，所以需要自己搭一个服务器，将另一台有光盘镜像 的centos将镜像挂载到上边
[root@rockynode-1 dockerfile]# yum install httpdListen 8080[root@rockynode-1 dockerfile]# mkdir /var/www/html/centos7
[root@rockynode-1 dockerfile]# mount /dev/sr1 /var/www/html/centos7/
[root@rockynode-1 dockerfile]# systemctl restart httpd
2.3.2 编写Dockerfile镜像文件
需要准备NGINX源码包
[root@rockynode-1 dockerfile]# docker load -i centos-7.tar.gz
[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
centos 7 eeb6ee3f44bd 2 years ago 204MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MB首先需要运行一个容器将他的yum源改成刚才配置的http服务器网址
[root@rockynode-1 dockerfile]# docker run -it --name=centos7 centos:7
[root@65ed46926df1 /]# [root@rockynode-1 dockerfile]#
[root@rockynode-1 dockerfile]# docker exec -it centos7 sh
sh-4.2# cd /etc/yum.repos.d/
sh-4.2# ls
CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Sources.repo CentOS-fasttrack.repo
CentOS-CR.repo CentOS-Media.repo CentOS-Vault.repo CentOS-x86_64-kernel.repo
sh-4.2# rm -fr *
sh-4.2# vi centos.repo
[rhel]
name=rhel
baseurl=http://172.17.0.1:8080/centos7
gpgcheck=0# ctrl + pq 退出
sh-4.2# read escape sequence # 将修改好的容器提交为镜像
dockerfile]# docker commit -m "cent2_repo" centos7 centos7:repo
可查看到容器的IP，他是与宿主机进行桥接的，也就是说链接这个就等于链接宿主机
编写Dockerfile 文件
[root@rockynode-1 dockerfile]# vim Dockerfile
FROM centos7:repo
LABEL mail = shuyan@123
ADD nginx-1.26.1.tar.gz /mnt
WORKDIR /mnt/nginx-1.26.1
RUN yum install gcc make pcre-devel openssl-devel -y && \
./configure --prefix=/usr/local/nginx --with-http_ssl_module \
--with-http_stub_status_module && make && make install && \
yum clean all && rm -rf /mnt/nginx-1.26.1
EXPOSE 80 443
VOLUME ["/usr/local/nginx/html"]
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off"]
[root@rockynode-1 dockerfile]# docker build -t centos:v3 .
[+] Building 36.7s (9/9) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 520B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2) 0.0s=> [internal] load metadata for docker.io/library/centos7:repo 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [internal] load build context 0.0s=> => transferring context: 102B 0.0s=> [1/4] FROM docker.io/library/centos7:repo 0.0s=> [2/4] ADD nginx-1.26.1.tar.gz /mnt 0.3s=> [3/4] WORKDIR /mnt/nginx-1.26.1 0.0s=> [4/4] RUN yum install gcc make pcre-devel openssl-devel -y && ./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-h 36.0s=> exporting to image 0.3s => => exporting layers 0.3s => => writing image sha256:68cf4567b2da65477bf5bfcb64ec9e8878a8d13fa8a3a593eb51a2ff7e1ec886 0.0s => => naming to docker.io/library/centos:v3 0.0s 1 warning found (use docker --debug to expand): - LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)
[root@rockynode-1 dockerfile]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos v3 68cf4567b2da 8 seconds ago 292MB
centos7 repo 9d9f5c6e1915 About a minute ago 204MB
centos repo 5726ef394719 2 hours ago 228MB
nginx 1.26-alpine 9703b2608a98 12 days ago 43.3MB
nginx latest 5ef79149e0ec 12 days ago 188MB
busybox latest 65ad0d468eb1 15 months ago 4.26MB
centos 7 eeb6ee3f44bd 2 years ago 204MB
timinglee/game2048 latest 19299002fdbe 7 years ago 55.5MB
timinglee/mario latest 9a35a9e43e8c 8 years ago 198MB
2.3.3 镜像优化示例
# 编译安装安装
FROM centos:repo AS build
LABEL mail = shuyan@123
ADD nginx-1.26.1.tar.gz /mnt
WORKDIR /mnt/nginx-1.26.1
RUN yum install gcc make pcre-devel openssl-devel -y && \
./configure --prefix=/usr/local/nginx --with-http_ssl_module \
--with-http_stub_status_module && make && make install && \
yum clean all && rm -rf /mnt/nginx-1.26.1# 软件迁移
FROM centos:repo
COPY --from=build /usr/local/nginx /usr/local/nginx
EXPOSE 80 443
VOLUME ["/usr/local/nginx/html"]
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off;"]
为了验证这一说法可以制作提交两个镜像
dockerfile]# docker commit -m "ngin_2" nginx_centos centos2:repo
dockerfile]# docker commit -m "ngin_2" nginx_centos centos3:repo
dockerfile]# docker images
[root@rockynode-1 dockerfile]# docker build -t centos:v4 .
[+] Building 0.1s (12/12) FINISHED docker:default=> [internal] load build definition from Dockerfile 0.0s=> => transferring dockerfile: 601B 0.0s=> WARN: LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2) 0.0s=> [internal] load metadata for docker.io/library/centos2:repo 0.0s=> [internal] load metadata for docker.io/library/centos3:repo 0.0s=> [internal] load .dockerignore 0.0s=> => transferring context: 2B 0.0s=> [internal] load build context 0.0s=> => transferring context: 102B 0.0s=> [stage-1 1/2] FROM docker.io/library/centos3:repo 0.0s=> [build 1/4] FROM docker.io/library/centos2:repo 0.0s=> CACHED [build 2/4] ADD nginx-1.26.1.tar.gz /mnt 0.0s=> CACHED [build 3/4] WORKDIR /mnt/nginx-1.26.1 0.0s=> CACHED [build 4/4] RUN yum install gcc make pcre-devel openssl-devel -y && ./configure --prefix=/usr/local/nginx --with-http_ssl_mod 0.0s=> CACHED [stage-1 2/2] COPY --from=build /usr/local/nginx /usr/local/nginx 0.0s=> exporting to image 0.0s=> => exporting layers 0.0s=> => writing image sha256:7f2c20fc731e9511b999d5786b03f4d697d9ce6204844dc32f111dbc63cde423 0.0s=> => naming to docker.io/library/centos:v4 0.0s1 warning found (use docker --debug to expand):- LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)
启动容器查看尝试是否能连接
dockerfile]# docker run -it -d -p 80:80 --name=nginx_new centos:v4
6783951e1fae546aafbd0c76f2c00c189e78b02c4bf01937177c57465153cc1cdockerfile]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6783951e1fae centos:v4 "/usr/local/nginx/sb…" 5 seconds ago Up 4 seconds 0.0.0.0:80->80/tcp, :::80->80/tcp, 443/tcp nginx_new