前面已经介绍了一些Dockerfile的一些指令,对于ENTRYPOINT和CMD也有介绍实验
一 ENTRYPOINT和CMD配置使用
ENTRYPOINT相当于CMD,是配置容器后的一个指令,但是他不会被提docker run供的参数覆盖,每个Dockerfile只能有一个ENTRYPOINT，如果指定了多个，只有最后一个被执行,而且一定会被执行
1.1 不指定CMD,使用子进程
例如,指定ENTRYPOINT,不指定CMD,看效果
FROM centos:7 LABEL darren darren@gmail.com ENV TZ "Asia/Shanghai" ADD keys.tar.gz / RUN yum -y install openssh-server \ && useradd natash \ && echo "redhat"|passwd --stdin natash \ && echo "redhat"|passwd --stdin root \ && ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N ''\ && ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N '' \ && ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N '' \ && echo "$TZ"\ && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #ADD keys/ssh_host_ecdsa_key /tmp/ssh_host_ecdsa_key #ADD keys/ssh_host_ed25519_key /tmp/ssh_host_ed25519_key #COPY keys/ssh_host_rsa_key /tmp/ssh_host_rsa_key #COPY keys.tar.gz /keys.tar.gz #RUN tar -zxf /keys.tar.gz && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #RUN cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key ./ EXPOSE 22 80 #CMD ["/usr/sbin/sshd", "-D"] ENTRYPOINT /usr/sbin/sshd #CMD /usr/sbin/sshd -D
上面执行之后,我们在运行容器加一个参数-D
[root@docker-server3 openssh]# docker build -t openssh:v1.8 .
[root@docker-server3 openssh]# docker run -d openssh:v1.8 -D
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 601a915564cd openssh:v1.8 "/bin/sh -c /usr/sbi…" 8 seconds ago Exited (0) 6 seconds ago nervous_almeida #没有运行成功 915f9a1854c6 openssh:v1.7 "/bin/sh -c '/usr/sb…" 22 minutes ago Up 22 minutes 22/tcp, 80/tcp practical_margulis 131649a5d893 openssh:v1.6 "/usr/sbin/sshd -D" 29 minutes ago Up 29 minutes 22/tcp, 80/tcp zealous_poincare e0847916fa35 nginx "nginx -g 'daemon of…" 37 minutes ago Up 37 minutes 80/tcp pedantic_blackburn 41e2d69f3503 openssh:v1.5 "/usr/sbin/sshd -D" 7 hours ago Up 7 hours objective_sinoussi db351e66fc63 openssh:v1.4 "/usr/sbin/sshd -D" 8 hours ago Up 8 hours nifty_curran f6a4ebe048cd openssh:v1.4 "/bin/bash" 8 hours ago Exited (0) 8 hours ago adoring_archimedes fd2c629a2b3c openssh:v1.3 "/usr/sbin/sshd -D" 2 days ago Up 2 days
是因为ENTRYPOINT /usr/sbin/sshd这个语法导致的,这样写,执行的过程是/bin/bash -c "/usr/sbin/sshd" -D ,是没有办法执行成功的
1.2 直接使用进程
修改
FROM centos:7 LABEL darren darren@gmail.com ENV TZ "Asia/Shanghai" ADD keys.tar.gz / RUN yum -y install openssh-server \ && useradd natash \ && echo "redhat"|passwd --stdin natash \ && echo "redhat"|passwd --stdin root \ && ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N ''\ && ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N '' \ && ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N '' \ && echo "$TZ"\ && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #ADD keys/ssh_host_ecdsa_key /tmp/ssh_host_ecdsa_key #ADD keys/ssh_host_ed25519_key /tmp/ssh_host_ed25519_key #COPY keys/ssh_host_rsa_key /tmp/ssh_host_rsa_key #COPY keys.tar.gz /keys.tar.gz #RUN tar -zxf /keys.tar.gz && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #RUN cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key ./ EXPOSE 22 80 #CMD ["/usr/sbin/sshd", "-D"] ENTRYPOINT ["/usr/sbin/sshd"] #CMD /usr/sbin/sshd -D
这种写法,容器执行就是/usr/sbin/sshd -D,就可以正常运行了
[root@docker-server3 openssh]# docker build -t openssh:v1.8 .
[root@docker-server3 openssh]# docker run -d openssh:v1.8 -D
[root@docker-server3 openssh]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 88396812fa0a openssh:v1.8 "/usr/sbin/sshd -D" 6 seconds ago Up 5 seconds 22/tcp, 80/tcp romantic_allen 601a915564cd 1613f91bbfb3 "/bin/sh -c /usr/sbi…" 8 minutes ago Exited (0) 8 minutes ago nervous_almeida 915f9a1854c6 openssh:v1.7 "/bin/sh -c '/usr/sb…" 30 minutes ago Up 30 minutes 22/tcp, 80/tcp practical_margulis 131649a5d893 openssh:v1.6 "/usr/sbin/sshd -D" 37 minutes ago Up 37 minutes 22/tcp, 80/tcp zealous_poincare e0847916fa35 nginx "nginx -g 'daemon of…" 46 minutes ago Up 46 minutes 80/tcp pedantic_blackburn 41e2d69f3503 openssh:v1.5 "/usr/sbin/sshd -D" 7 hours ago Up 7 hours objective_sinoussi db351e66fc63 openssh:v1.4 "/usr/sbin/sshd -D" 8 hours ago Up 8 hours nifty_curran f6a4ebe048cd openssh:v1.4 "/bin/bash" 8 hours ago Exited (0) 8 hours ago adoring_archimedes fd2c629a2b3c openssh:v1.3 "/usr/sbin/sshd -D" 2 days ago Up 2 days
ENTRYPOINT运行在CMD之前,所以必须写在CMD前面
同时,一些容器可以直接添加参数,但是不能使用完整的指令,就是因为生成镜像的时候,直接使用的ENTRYPOINT这个参数
1.3 加上CMD参数执行
FROM centos:7 LABEL darren darren@gmail.com ENV TZ "Asia/Shanghai" ADD keys.tar.gz / RUN yum -y install openssh-server \ && useradd natash \ && echo "redhat"|passwd --stdin natash \ && echo "redhat"|passwd --stdin root \ && ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N ''\ && ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N '' \ && ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N '' \ && echo "$TZ"\ && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #ADD keys/ssh_host_ecdsa_key /tmp/ssh_host_ecdsa_key #ADD keys/ssh_host_ed25519_key /tmp/ssh_host_ed25519_key #COPY keys/ssh_host_rsa_key /tmp/ssh_host_rsa_key #COPY keys.tar.gz /keys.tar.gz #RUN tar -zxf /keys.tar.gz && cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key /tmp/ #RUN cp /keys/ssh_host_ecdsa_key /keys/ssh_host_ed25519_key /keys/ssh_host_rsa_key ./ EXPOSE 22 80 #CMD ["/usr/sbin/sshd", "-D"] ENTRYPOINT ["/usr/sbin/sshd"] CMD ["-D"] #CMD /usr/sbin/sshd -D
上面的操作,ENTRYPOINT和CMD一个简单的配合使用
二 ENTRYPOINT的高级用法
删掉所有的容器
2.1 写一个简单的nginx的Dockerfile
[root@docker-server3 openssh]# mkdir /nginx
[root@docker-server3 openssh]# cd /nginx
[root@docker-server3 httpd]# vi Dockerfile
FROM centos:7 RUN yum install -y wget && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo \ && yum -y install nginx EXPOSE 80 CMD ["nginx","-g","daemon off;"]
[root@docker-server3 nginx]# docker build -t nginx:v1.1 .
Sending build context to Docker daemon 2.048kB Step 1/4 : FROM centos:7 ---> 5e35e350aded Step 2/4 : RUN yum install -y wget && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo && yum -y install nginx ---> Using cache ---> 6cd0272f03af Step 3/4 : EXPOSE 80 ---> Running in d4b38097012d Removing intermediate container d4b38097012d ---> 2059882b01c1 Step 4/4 : CMD ["nginx","-g","daemon off;"] ---> Running in 7bb92490efc5 Removing intermediate container 7bb92490efc5 ---> 68354cda3d7b Successfully built 68354cda3d7b Successfully tagged nginx:v1.1
[root@docker-server3 nginx]# docker run -d nginx:v1.1
666927b25d2f081ce70aca3719c407cce7db6d2ba200b1241d78bf7455e1dc6b
[root@docker-server3 nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 666927b25d2f nginx:v1.1 "nginx -g 'daemon of…" 4 seconds ago Up 2 seconds 80/tcp xenodochial_austin
访问这个端口
[root@docker-server3 nginx]# docker inspect 666927b25d2f|grep IP
"LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "192.168.0.9", "IPPrefixLen": 24, "IPv6Gateway": "", "IPAMConfig": null, "IPAddress": "192.168.0.9", "IPPrefixLen": 24, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0,
[root@docker-server3 nginx]# curl http://192.168.0.9
<html> <head><title>403 Forbidden</title></head> <body> <center><h1>403 Forbidden</h1></center> <hr><center>nginx/1.16.1</center> </body> </html>
2.2 出现403错误,进入容器检查
[root@docker-server3 nginx]# docker exec -it 666927b25d2f /bin/bash
[root@666927b25d2f /]# ps -ef|grep nginx
root 1 0 0 21:10 ? 00:00:00 nginx: master process nginx -g daemon off; nginx 6 1 0 21:10 ? 00:00:00 nginx: worker process nginx 7 1 0 21:10 ? 00:00:00 nginx: worker process nginx 8 1 0 21:10 ? 00:00:00 nginx: worker process nginx 9 1 0 21:10 ? 00:00:00 nginx: worker process root 25 10 0 21:15 pts/0 00:00:00 grep --color=auto nginx
[root@666927b25d2f /]# yum -y install net-tools
[root@666927b25d2f /]# netstat -ntlp
Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1/nginx: master pro tcp6 0 0 :::80 :::* LISTEN 1/nginx: master pro
[root@666927b25d2f /]# cd /usr/share/nginx/html/
[root@666927b25d2f html]# ll
[root@666927b25d2f html]# rm -rf index.html
[root@666927b25d2f html]# echo "just a test" > index.html
[root@666927b25d2f html]# curl http://127.0.0.1
just a test
[root@666927b25d2f html]# exit
exit
[root@docker-server3 nginx]# curl http://192.168.0.9
2.3 根据以上信息修改Dockerfile文件
FROM centos:7 WORKDIR /usr/share/nginx/html RUN yum install -y wget && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo \ && yum -y install nginx && rm -rf index.html && echo "nginx in custom docker" > index.html EXPOSE 80 CMD ["nginx","-g","daemon off;"]
[root@docker-server3 nginx]# docker build -t nginx:v1.2 .
[root@docker-server3 nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 55645329c490 nginx:v1.2 "nginx -g 'daemon of…" 4 seconds ago Up 3 seconds 80/tcp intelligent_carson 666927b25d2f nginx:v1.1 "nginx -g 'daemon of…" 18 minutes ago Up 18 minutes 80/tcp xenodochial_austin
[root@docker-server3 nginx]# docker inspect 55645329c490|grep IP
"LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "192.168.0.2", "IPPrefixLen": 24, "IPv6Gateway": "", "IPAMConfig": null, "IPAddress": "192.168.0.2", "IPPrefixLen": 24, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0,
[root@docker-server3 nginx]# curl http://192.168.0.2
需求,根据这个基础的ngix镜像,传递不同的参数,使用不同的代码,访问不同的网站
2.4 使用-e传递参数
[root@docker-server3 nginx]# docker run -d -e "index=docker" -e "a=b" nginx:v1.2
[root@docker-server3 nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 593a35ccbbf9 nginx:v1.2 "nginx -g 'daemon of…" 11 seconds ago Up 10 seconds 80/tcp cool_clarke 55645329c490 nginx:v1.2 "nginx -g 'daemon of…" 6 minutes ago Up 6 minutes 80/tcp intelligent_carson 666927b25d2f nginx:v1.1 "nginx -g 'daemon of…" 24 minutes ago Up 24 minutes 80/tcp xenodochial_austin
2.5 查看传递参数的效果
[root@docker-server3 nginx]# docker exec -it 593a35ccbbf9 /bin/bash
[root@593a35ccbbf9 html]# env HOSTNAME=593a35ccbbf9 TERM=xterm LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.flac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36: index=docker PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin PWD=/usr/share/nginx/html a=b SHLVL=1 HOME=/root _=/usr/bin/env
已经传递了参数
2.6 构建ENTRYPOINT使用脚本
[root@docker-server3 nginx]# vi build.sh
#!/bin/sh indexfile=/usr/share/nginx/html/index.html if [ ! -z "$index" ];then echo "nginx in $index" > $indexfile else echo "just a test" > $indexfile fi
2.7 修改Dockerfile,添加ENTRYPOINT指令
[root@docker-server3 nginx]# cat Dockerfile
FROM centos:7 WORKDIR /usr/share/nginx/html ADD build.sh /build.sh RUN yum install -y wget && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo \ && yum -y install nginx && rm -rf index.html && echo "nginx in custom docker" > index.html && chmod +x /build.sh EXPOSE 80 ENTRYPOINT ["/build.sh"] CMD ["nginx","-g","daemon off;"]
[root@docker-server3 nginx]# docker build -t nginx:v1.3 .
[root@docker-server3 nginx]# docker run -d nginx:v1.3
[root@docker-server3 nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 9de02f005f66 nginx:v1.3 "/build.sh nginx -g …" 3 seconds ago Exited (0) 2 seconds ago flamboyant_poincare 593a35ccbbf9 nginx:v1.2 "nginx -g 'daemon of…" 25 minutes ago Up 25 minutes 80/tcp cool_clarke 55645329c490 nginx:v1.2 "nginx -g 'daemon of…" 31 minutes ago Up 31 minutes 80/tcp intelligent_carson 666927b25d2f nginx:v1.1 "nginx -g 'daemon of…" 49 minutes ago Up 49 minutes 80/tcp xenodochial_austin
这样操作的问题,是因为ENTRYPOINT这个指令存在的时候,CMD就会变成/build.sh脚本的一个参数,但是这个脚本不需要参数,就会错误
2.8 修改build.sh,修正错误后结果
[root@docker-server3 nginx]# vi build.sh
#!/bin/sh indexfile=/usr/share/nginx/html/index.html if [ ! -z "$index" ];then echo "nginx in $index" > $indexfile else echo "just a test" > $indexfile fi exec "$@"
[root@docker-server3 nginx]# docker build -t nginx:v1.4 .
[root@docker-server3 nginx]# docker run -d nginx:v1.4
0fef39ec7ffd76bb7b8fb45116be2b3beea08e82c66ffc8fec66d49188f9af11
[root@docker-server3 nginx]# docker inspect 0fef39ec7ffd|grep IP
"LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "192.168.0.4", "IPPrefixLen": 24, "IPv6Gateway": "", "IPAMConfig": null, "IPAddress": "192.168.0.4", "IPPrefixLen": 24, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0,
[root@docker-server3 nginx]# curl http://192.168.0.4
[root@docker-server3 nginx]# docker run -d -e "index=aaa" nginx:v1.4
3b26204c8758cb0b104be1106dd33c2ae29430db3af59e49209cd0357aaae3df
[root@docker-server3 nginx]# docker inspect 3b26204c8758|grep IP
"LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "192.168.0.5", "IPPrefixLen": 24, "IPv6Gateway": "", "IPAMConfig": null, "IPAddress": "192.168.0.5", "IPPrefixLen": 24, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0,
[root@docker-server3 nginx]# curl http://192.168.0.5
ENTRYPOINT参数介绍到这里,关于dockefile文件的编写学习,可以看官方https://hub.docker.com
2.10 官方Dockerfile介绍
根据官方,看一个mysql的dockerfile文件
https://hub.docker.com/_/mysql
点击会得到一个连接
进入,得到官方的DOCKERFILE
https://github.com/docker-library/mysql/blob/6659750146b7a6b91a96c786729b4d482cf49fe6/8.0/Dockerfile
FROM debian:stretch-slim # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added RUN groupadd -r mysql && useradd -r -g mysql mysql RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/* # add gosu for easy step-down from root ENV GOSU_VERSION 1.7 RUN set -x \ && apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \ && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \ && wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \ && export GNUPGHOME="$(mktemp -d)" \ && gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \ && gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \ && gpgconf --kill all \ && rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc \ && chmod +x /usr/local/bin/gosu \ && gosu nobody true \ && apt-get purge -y --auto-remove ca-certificates wget RUN mkdir /docker-entrypoint-initdb.d RUN apt-get update && apt-get install -y --no-install-recommends \ # for MYSQL_RANDOM_ROOT_PASSWORD pwgen \ # for mysql_ssl_rsa_setup openssl \ # FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db: # File::Basename # File::Copy # Sys::Hostname # Data::Dumper perl \ && rm -rf /var/lib/apt/lists/* RUN set -ex; \ # gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; \ export GNUPGHOME="$(mktemp -d)"; \ gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \ gpg --batch --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; \ gpgconf --kill all; \ rm -rf "$GNUPGHOME"; \ apt-key list > /dev/null ENV MYSQL_MAJOR 8.0 ENV MYSQL_VERSION 8.0.18-1debian9 RUN echo "deb http://repo.mysql.com/apt/debian/ stretch mysql-${MYSQL_MAJOR}" > /etc/apt/sources.list.d/mysql.list # the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql) # also, we set debconf keys to make APT a little quieter RUN { \ echo mysql-community-server mysql-community-server/data-dir select ''; \ echo mysql-community-server mysql-community-server/root-pass password ''; \ echo mysql-community-server mysql-community-server/re-root-pass password ''; \ echo mysql-community-server mysql-community-server/remove-test-db select false; \ } | debconf-set-selections \ && apt-get update && apt-get install -y mysql-community-client="${MYSQL_VERSION}" mysql-community-server-core="${MYSQL_VERSION}" && rm -rf /var/lib/apt/lists/* \ && rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql /var/run/mysqld \ && chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \ # ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime && chmod 777 /var/run/mysqld VOLUME /var/lib/mysql # Config files COPY config/ /etc/mysql/ COPY docker-entrypoint.sh /usr/local/bin/ RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat ENTRYPOINT ["docker-entrypoint.sh"] #ENTRYPOINT指令 EXPOSE 3306 33060 CMD ["mysqld"]
https://github.com/docker-library/mysql/tree/6659750146b7a6b91a96c786729b4d482cf49fe6/8.0
查看docker-entrypoint.sh
Dockerfile学习到这里
博主声明：本文的内容来源主要来自誉天教育晏威老师，由本人实验完成操作验证，需要的博友请联系誉天教育（http://www.yutianedu.com/），获得官方同意或者晏老师（https://www.cnblogs.com/breezey/）本人同意即可转载，谢谢！