docker容器官网：https://hub.docker.com/
一、centos7.4中指定安装docker版本
1）默认yum源安装的docker版本为docker1.3。性能偏低，不支持k8s。k8s目前只支持docker1.7
谷歌浏览器打开。清华大学镜像网站：https://mirrors4.tuna.tsinghua.edu.cn/
找到docker的镜像源
https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/
2）复制该链接地址
cd /etc/yum.repos.d/ wget https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo 注意该文件的源并不是指向清华源，所以需要修改docker-ce.repo
3）修改源
修改源。修改前面的linux的父目录 vim docker-ce.repo 原来的：baseurl=https://download.docker.com/linux/centos/7/$basearch/stable 原来的：baseurl=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/7/$basearch/stable vim命令快速修改 :%s@https://download.docker.com/@https://mirrors.tuna.tsinghua.edu.cn/docker-ce/@
回车之后。24 次替换，共 24 行
4）yum安装
[root@Mysql yum.repos.d]# yum repolist 已加载插件：fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.shu.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.cn99.com 源标识 源名称 状态 base/7/x86_64 CentOS-7 - Base 10,019 docker-ce-stable/x86_64 Docker CE Stable - x86_64 32 extras/7/x86_64 CentOS-7 - Extras 364 updates/7/x86_64 CentOS-7 - Updates 1,067 repolist: 11,482 [root@Mysql yum.repos.d]# yum install docker-ce -y
[root@Mysql yum.repos.d]# docker -v
Docker version 18.09.2, build 6247962
5）创建配置文件
[root@Mysql yum.repos.d]# mkdir -p /etc/docker [root@Mysql yum.repos.d]# touch /etc/docker/daemon.json [root@Mysql yum.repos.d]# vim /etc/docker/daemon.json [root@Mysql yum.repos.d]# cat /etc/docker/daemon.json { "registry-mirrors":["https://registry.docker-cn.com"] }
6）docker加速器
docker cn
阿里云加速器
中国科技大学
二、docker基础
1）启动docker
systemctl start docker.service 启动服务
docker version 查看版本
docker info 更详细的信息
2）官方寻找nginx的最小稳定镜像文件，进行容器测试
[root@Mysql ~]# docker image pull nginx:1.14-alpine
3）最小的容器测试http网络服务
docker image pull nginx:1.14-alpine # 下载最小镜像 docker pull busybox docker image ls docker image ls --no-trunc docker ps == docker container ls docker network ls 显示网络 [root@Mysql ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx 1.14-alpine 66952fd0a8ef 2 weeks ago 16MB busybox latest 3a093384ac30 6 weeks ago 1.2MB [root@Mysql ~]# docker run --name b1 -it busybox:latest # 进入最小化的容器，进入shell交互 / # / # mkdir /data/html -p / # vi /data/html/index.html / # cat /data/html/index.html hello world / # httpd -f -h /data/html/ docker inspect b1 # 查看运行中的容器信息，包括里面的ip地址 [root@Mysql ~]# curl 172.17.0.2 hello world
4）容器内，使用exit，退出容器。容器处于停止状态
/ # exit [root@Mysql ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [root@Mysql ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b3cda629bceb busybox:latest "sh" 9 minutes ago Exited (0) 7 seconds ago b1
再次启动容器：docker start -i -a b1
5）强制停止容器，删除容器
[root@Mysql ~]# docker kill b1 b1 [root@Mysql ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b3cda629bceb busybox:latest "sh" 14 minutes ago Exited (137) 10 seconds ago b1 [root@Mysql ~]# docker rm b1 b1
6）docker最小化的运行容器，且只运行一个进程，容器内并不会有存放日志的文件夹。docker logs 容器 查看日志
docker run --name web1 -d nginx:1.14-alpine # -d 后台启动 [root@Mysql ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8eeeefc3e562 nginx:1.14-alpine "nginx -g 'daemon of…" About a minute ago Up 59 seconds 80/tcp web1 [root@Mysql ~]# curl 172.17.0.2 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html> docker run --name kvstor1 -d redis:4-alpine # 最小化启动redis [root@Mysql ~]# docker exec -it kvstor1 /bin/sh /data # ps PID USER TIME COMMAND 1 redis 0:00 redis-server 17 root 0:00 /bin/sh 22 root 0:00 ps [root@Mysql ~]# docker logs web1 查看web1容器的日志 172.17.0.1 - - [16/Feb/2019:17:32:49 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"
7）容器的保存，删除
docker inspect web1 显示容器的信息 docker commit -p web1 暂停容器，保存镜像 [root@Mysql ~]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE <none> <none> c1d0456bb6ff About a minute ago 16MB [root@Mysql ~]# docker tag c1d0456bb6ff test/httpd:v0.1-1 为保存的容器打标签 [root@Mysql ~]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE test/httpd v0.1-1 c1d0456bb6ff 3 minutes ago 16MB [root@Mysql ~]# docker tag test/httpd:v0.1-1 test/httpd:latest 再次创建标签 [root@Mysql ~]# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE test/httpd latest c1d0456bb6ff 5 minutes ago 16MB test/httpd v0.1-1 c1d0456bb6ff 5 minutes ago 16MB docker image rm test/httpd:latest 删除标签镜像 docker run --name t1 -it test/httpd:v0.1-1 运行保存的镜像 docker commit -a "1257063655@qq.com" -c 'CMD ["/bin/httpd","-f","-h","/data/html"]' -p web1 test/httpd:v0.2
8）容器的分享，打包
传镜像到docker.github [root@Mysql ~]# docker login -u 1257063655 登录https://hub.docker.com/ Password: docker push 1257063655/httpd # 将镜像上传到https://hub.docker.com/，需要去官网建立httpd仓库，并且1257063655/httpd 既是本地的镜像名，也是远程的仓库名 https://promotion.aliyun.com/ntms/act/kubernetes.html 阿里镜像 docker save -o myimages.gz test/httpd:v0.2 test/httpd:v0.1-1 本地打包2个镜像，合并为一个镜像 [root@Mysql ~]# ls myimages.gz myimages.gz docker load -i myimages.gz 另一台机器导入打包的镜像myimages.gz
三、docker网络
1）查看网络（扩展）
yum install bridge-utils -y [root@Mysql ~]# brctl show bridge name bridge id STP enabled interfaces docker0 8000.02423f80d8e7 no veth2a1c29a veth32a55df veth90301d9 ip link show iptables -t nat -vnL docker network inspect bridge docker container inspect web1 rpm -q iproute ip netns ip netns add r1 ip netns add r2 ip netns list r2 r1 ip netns exec r1 ifconfig ip netns exec r1 ifconfig -a
iptables -t nat -vnL
2）指定运行的容器的dns，主机文件
docker run --name t1 -it --network bridge -h t1.hostname --dns 114.114.114.114 --dns-search www.com --add-host web01:172.17.0.3 --rm busybox:latest 进入容器，退出则删除 homename =》t1.hostname cat /etc/host 172.17.0.2 t1.hostname nslookup -type=A www.baidu.com 解析路由网络
3）端口映射等问题。必须掌握
docker run --name myweb --rm -p 80 test/httpd:v0.2 宿组机随机映射一个端口给80 docker inspect myweb 该内部的通信：curl 172.17.0.2 iptables -t nat -vnL 查看被所有被随机映射的端口 docker port myweb 查看被映射的端口 更多的映射方法 docker run --name myweb --rm -p 192.168.1.5::80 test/httpd:v0.2 docker run --name myweb --rm -p 80:80 test/httpd:v0.2 docker run --name myweb --rm -p 192.168.1.5:8080:80 test/httpd:v0.2
4）容器共享网络，共用同一个ip
容器共享网络的方式,b1和b2共用一个网络。类似于同一个主机运行了2个进程 docker run --name b2 --network container:b1 -it rm busybox docker run --name b2 --network host -it rm busybox 将宿机的网络给了容器
5) 修改docker内的网络，网卡信息
示例，
重启服务。启动的容器ip网缎为：10.0.0.1的网段的
重启服务后，
6）额外创建新的网关
docker network create -d bridge --subnet "172.26.0.0/16" --gateway "172.26.0.1" mybr0 创建自己的网络网关 docker network ls 查看创建的自己网络 docker run --name t1 -it --net mybr0 busybox:latest # 运行的容器为自己的网络
问题：同一个宿主机的2个容器在不同的网断怎么通信。
理论上可以直接通信的，防火墙规则。iptables -t nat -vnL 的阻碍
四、docker的持久化存储
1）存储卷的基本使用
第一种，docker自行选择映射路径，不建议。不好区别是谁存储的数据 docker run --name b2 -it -v /data busybox 建立存储卷，容器内的 /data下面的数据会被宿主机保存 docker inspect b2 查看容器信息 Source": "/var/lib/docker/volumes/25dd2c087543280b9569ff34356330cf72ee74863bb5a0028a08e2802852fa83/_data", 该位置内容与容器内的 data目录已做了关联 第二种，手动指定位置，即便删除容器，数据仍在 docker run --name b2 -it -v /data/volumes/b2:/data busybox [root@Mysql ~]# docker inspect -f {{.Mounts}} b2 # 过滤查找选项 [{bind /data/volumes/b2 /data true rprivate}] [root@Mysql ~]# docker inspect -f {{.NetworkSettings.IPAddress}} b2 172.17.0.5 多个容器，可以共享同一个存储卷
四、dockerfile语法
1）最简单的Dockerfile语法，制作镜像
[root@Mysql ~]# mkdir img1 [root@Mysql ~]# cd img1/ 创建镜像文件Dockerfile文件 [root@Mysql img1]# vim Dockerfile [root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ # 注意index.html 需要在当前目录 [root@Mysql img1]# cat index.html <h1>Busybox httpd server</h1> <h2>Hello world</h1> [root@Mysql img1]# docker build -t tinyhttpd:v0.1-1 /root/img1/ # 启动镜像 [root@Mysql img1]# docker image ls |grep tinyhttpd tinyhttpd v0.1-1 080174d7d1a9 About a minute ago 1.2MB
编辑被拷贝的index.html
[root@Mysql img1]# cat index.html
<h1>Busybox httpd server</h1>
<h2>Hello world</h1>
根据制作的镜像的启动容器，检验是否有文件
[root@Mysql img1]# docker run --name tinyweb1 --rm tinyhttpd:v0.1-1 cat /data/web/html/index.html <h1>Busybox httpd server</h1> <h2>Hello world</h1>
2）镜像文件的修改，新增不同路径的拷贝内容
[root@Mysql img1]# cp -r /etc/yum.repos.d/ ./ [root@Mysql img1]# ls yum.repos.d/ CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo docker-ce.repo [root@Mysql img1]# vim Dockerfile [root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ [root@Mysql img1]# docker build -t tinyhttpd:v0.1-2 /root/img1/
检验是否被拷贝进去
[root@Mysql img1]# docker run --name tinyweb1 --rm tinyhttpd:v0.1-2 ls /etc/yum.repos.d/ CentOS-Base.repo CentOS-CR.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Sources.repo CentOS-Vault.repo CentOS-fasttrack.repo docker-ce.repo
3）add用法
以nginx为例
3.1）ADD后面加链接地址，通过链接地址下载
复制其链接地址 http://nginx.org/download/nginx-1.15.8.tar.gz
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/
检验add效果
docker run --name tinyweb1 --rm tinyhttpd:v0.1-3 ls /usr/local/src
3.2）ADD加本地文件，本地文件实现拷贝效果
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ ADD nginx-1.15.8.tar.gz /usr/local/src/ [root@Mysql img1]# docker build -t tinyhttpd:v0.1-4 ./
3.3）指明工作目录。WORKDIR
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ WORKDIR /usr/local/ ADD nginx-1.15.8.tar.gz ./src/
4）创建存储卷。VOLUME
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ WORKDIR /usr/local/ ADD nginx-1.15.8.tar.gz ./src/ VOLUME /data/mysql
5.1）暴露端口,端口仅可被宿主机访问
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" COPY index.html /data/web/html/ COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ WORKDIR /usr/local/ ADD nginx-1.15.8.tar.gz ./src/ VOLUME /data/mysql EXPOSE 80/tcp
检验端口是否可以被外界访问
启动：
docker run --name tinyweb1 --rm tinyhttpd:v0.1-5 /bin/httpd -f -h /data/web/html
docker inspect tinyweb1查看ip
[root@Mysql img1]# curl 172.17.0.6 <h1>Busybox httpd server</h1> <h2>Hello world</h1>
但暴露的端口也只有宿主机能访问，没有做端口映射
[root@Mysql img1]# docker port tinyweb1 没有查到端口
[root@Mysql img1]# docker kill tinyweb1
5.2）启动时加上 -P
[root@Mysql img1]# docker run --name tinyweb1 --rm -P tinyhttpd:v0.1-5 /bin/httpd -f -h /data/web/html
检查端口
[root@Mysql img1]# docker port tinyweb1
80/tcp -> 0.0.0.0:32768
6.1）环境变量 ENV
COPY index.html ${DOC_ROOT:-/data/web/html/} 如果定义的环境变量没有值，则用后面的
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" ENV DOC_ROOT /data/web/html/ COPY index.html ${DOC_ROOT:-/data/web/html/} COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ WORKDIR /usr/local/ ADD nginx-1.15.8.tar.gz ./src/ VOLUME /data/mysql EXPOSE 80/tcp
6.2）定义多个环境变量
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8" COPY index.html ${DOC_ROOT:-/data/web/html/} COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/nginx-1.15.8.tar.gz /usr/local/src/ WORKDIR /usr/local/ ADD ${WEB_SERVER_PACKAGE}.tar.gz ./src/ VOLUME /data/mysql EXPOSE 80/tcp
6.3)容器运行后输出环境变量
[root@Mysql img1]# docker run --name tinyweb1 --rm -P tinyhttpd:v0.1-6 printenv PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=634ff3a5d399 DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE=nginx-1.15.8 HOME=/root 运行时，再次传变量，有的原变量会被替换 [root@Mysql img1]# docker run --name tinyweb1 --rm -P -e WEB_SERVER_PACKAGE=nginx-1.15.7 tinyhttpd:v0.1-6 printenv PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=7dc972609f71 WEB_SERVER_PACKAGE=nginx-1.15.7 DOC_ROOT=/data/web/html/ HOME=/root
7.1）制作镜像时RUN 命令
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8.tar.gz" COPY index.html ${DOC_ROOT:-/data/web/html/} COPY yum.repos.d /etc/yum.repos.d/ ADD http://nginx.org/download/${WEB_SERVER_PACKAGE} /usr/local/src/ WORKDIR /usr/local/ # ADD ${WEB_SERVER_PACKAGE} ./src/ VOLUME /data/mysql/ EXPOSE 80/tcp RUN cd /usr/local/src && tar xf ${WEB_SERVER_PACKAGE}
7.2）命令测试
[root@Mysql img1]# cat Dockerfile # Description:test image FROM busybox:latest MAINTAINER "Test <1257063655@qq.com>" # LABEL maintainer="1257063655@qq.com" ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8.tar.gz" COPY index.html ${DOC_ROOT:-/data/web/html/} COPY yum.repos.d /etc/yum.repos.d/ # ADD http://nginx.org/download/${WEB_SERVER_PACKAGE} /usr/local/src/ WORKDIR /usr/local/ ADD ${WEB_SERVER_PACKAGE} ./src/ VOLUME /data/mysql/ EXPOSE 80/tcp RUN cd /usr/local/src && mv nginx-1.15.8 nginx [root@Mysql img1]# docker build -t tinyhttpd:v0.2.1 ./ Sending build context to Docker daemon 1.051MB Step 1/10 : FROM busybox:latest ---> 3a093384ac30 Step 2/10 : MAINTAINER "Test <1257063655@qq.com>" ---> Using cache ---> c04c090e9e40 Step 3/10 : ENV DOC_ROOT=/data/web/html/ WEB_SERVER_PACKAGE="nginx-1.15.8.tar.gz" ---> Using cache ---> 6832ee6cc92e Step 4/10 : COPY index.html ${DOC_ROOT:-/data/web/html/} ---> Using cache ---> 45c2e54c0d74 Step 5/10 : COPY yum.repos.d /etc/yum.repos.d/ ---> Using cache ---> 348917f42afe Step 6/10 : WORKDIR /usr/local/ ---> Using cache ---> df3d710f5ac9 Step 7/10 : ADD ${WEB_SERVER_PACKAGE} ./src/ ---> Using cache ---> 83c0b4f691e4 Step 8/10 : VOLUME /data/mysql/ ---> Using cache ---> c13d38f9b94b Step 9/10 : EXPOSE 80/tcp ---> Using cache ---> 7bd7c1d365cf Step 10/10 : RUN cd /usr/local/src && mv nginx-1.15.8 nginx ---> Running in 35f4b3aae6a1 Removing intermediate container 35f4b3aae6a1 ---> 41413a7ce98a Successfully built 41413a7ce98a Successfully tagged tinyhttpd:v0.2.1
7.3）根据命令yum安装nginx
FROM centos
RUN yum -y install epel-release && yum makecache && yum install nginx -y
8.1）CMD命令的使用
[root@Mysql img2]# cat Dockerfile FROM busybox LABEL maintainer="My <1257063655.qq.com>" app="httpd" ENV WEB_DOC_ROOT="/data/web/html" RUN mkdir -p $WEB_DOC_ROOT && echo '<h1>hello world,httpd server</h1>' > ${WEB_DOC_ROOT}/index.html CMD /bin/httpd -f -h ${WEB_DOC_ROOT} [root@Mysql img2]# docker build -t tinyhttpd:v0.2-1 ./
查看制作镜像的详细信息
docker image inspect tinyhttpd:v0.2-1
运行
docker run --name tinyweb2 -it --rm -P tinyhttpd:v0.2-1
查看
[root@Mysql ~]# docker exec -it tinyweb2 /bin/sh / # / # ps PID USER TIME COMMAND 1 root 0:00 /bin/httpd -f -h /data/web/html 6 root 0:00 /bin/sh 11 root 0:00 ps
9）不会被覆盖的运行命令。ENTRYPOINT
[root@Mysql img2]# cat Dockerfile FROM busybox LABEL maintainer="My <1257063655.qq.com>" app="httpd" ENV WEB_DOC_ROOT="/data/web/html" RUN mkdir -p $WEB_DOC_ROOT && echo '<h1>hello world,httpd server</h1>' > ${WEB_DOC_ROOT}/index.html # CMD /bin/httpd -f -h ${WEB_DOC_ROOT} # CMD ["/bin/sh","-c","/bin/httpd","-f","-h ${WEB_DOC_ROOT}"] # 有问题，不建议用 ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT}
启动容器。docker run --name tinyweb2 -it --rm -P tinyhttpd:v0.2-3 ls /data/ 后面接的命令不会覆盖制作镜像用的命令。后面接的命令会被当做参数传给它
10) 脚本启动nginx。使用传参的方法
10.1）编辑脚本文件
[root@Mysql img3]# cat entrypoint.sh #!/bin/sh # cat > /etc/nginx/conf.d/www.conf <<EOF server { server_name ${HOSTNAME}; listen ${IP:-0.0.0.0}:${PORT:-80}; root ${NGX_DOC_ROOT:-/usr/share/nginx/html}; } EOF exec "$@"
10.2）编辑首页文件
[root@Mysql img3]# cat index.html <h1> Hello world,study python </h1>
10.3）编辑Dockerfile文件
[root@Mysql img3]# cat Dockerfile FROM nginx:1.14-alpine LABEL maintainer="my <125.7063655@qq.com>" ENV NGX_DOC_ROOT="/data/web/html/" ADD index.html ${NGX_DOC_ROOT} ADD entrypoint.sh /bin/ CMD ["/usr/sbin/nginx","-g","daemon off;"] ENTRYPOINT ["/bin/entrypoint.sh"]
10.4)启动容器检验
启动 [root@Mysql img3]# docker run --name myweb1 --rm -P myweb:v0.3-3 进入容器 [root@Mysql img3]# docker exec -it myweb1 /bin/sh / # cat /etc/nginx/conf.d/www.conf server { server_name 0e107f492212; listen 0.0.0.0:80; root /data/web/html; } / # cat /data/web/html <h1> Hello world,study python </h1> / # netstat -tnl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -------- / # wget -O - -q localhost 本地明 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html> ------------------------- / # wget -O - -q 0e107f492212 <h1> Hello world,study python </h1>
/ # netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
10.5）启动容器时再增加端口参数，测试
添加端口 [root@Mysql img3]# docker run --name myweb1 --rm -P -e "PORT=8080" myweb:v0.3-4 / # [root@Mysql img3]# docker exec -it myweb1 /bin/sh / # netstat -tnl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
11）健康检查。HEALTHCHECK 健康检查，不太清楚。
[root@Mysql img3]# cat Dockerfile FROM nginx:1.14-alpine LABEL maintainer="my <125.7063655@qq.com>" ENV NGX_DOC_ROOT="/data/web/html/" ADD index.html ${NGX_DOC_ROOT} ADD entrypoint.sh /bin/ EXPOSE 80/tcp HEALTHCHECK --start-period=3s CMD wget -o - -q http://${IP:-0.0.0.0}:${PORT:-80}/ CMD ["/usr/sbin/nginx","-g","daemon off;"] ENTRYPOINT ["/bin/entrypoint.sh"]
12.1) ARG常量传参的用法
[root@Mysql img3]# cat Dockerfile FROM nginx:1.14-alpine ARG author="my <125.7063655@qq.com>" LABEL maintainer="${author}" ENV NGX_DOC_ROOT="/data/web/html/" ADD index.html ${NGX_DOC_ROOT} ADD entrypoint.sh /bin/ EXPOSE 80/tcp HEALTHCHECK --start-period=3s CMD wget -o - -q http://${IP:-0.0.0.0}:${PORT:-80}/ CMD ["/usr/sbin/nginx","-g","daemon off;"] ENTRYPOINT ["/bin/entrypoint.sh"]
替换定义的常量
docker build -t myweb:v0.3-7 ./ 替换定义的默认值 author="pony <pony@qq.com>" docker build --build-arg author="pony <pony@qq.com>" -t myweb:v0.3-8 ./
13）ONBUILD 。根据ONBUILD 创建的镜像，其他dockerfile引用此镜像创建镜像时，会触发执行ONBUILD 里面的指令
FROM nginx:1.14-alpine ARG author="my <125.7063655@qq.com>" LABEL maintainer="${author}" ENV NGX_DOC_ROOT="/data/web/html/" ADD index.html ${NGX_DOC_ROOT} ADD entrypoint.sh /bin/ EXPOSE 80/tcp HEALTHCHECK --start-period=3s CMD wget -o - -q http://${IP:-0.0.0.0}:${PORT:-80}/ ONBUILD ADD http://repo.webtatic.com/yum/el6/latest.rpm /usr/local/src/ CMD ["/usr/sbin/nginx","-g","daemon off;"] ENTRYPOINT ["/bin/entrypoint.sh"]
14）GitHub里面有很大dockerfile文件
五、resistry使用
[root@Mysql img3]# yum info docker-registry 已加载插件：fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.shu.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com 可安装的软件包 名称 ：docker-registry 架构 ：x86_64 版本 ：0.9.1 发布 ：7.el7 大小 ：123 k 源 ：extras/7/x86_64 简介 ： Registry server for Docker 网址 ：https://github.com/docker/docker-registry 协议 ： ASL 2.0 描述 ： Registry server for Docker (hosting/delivering of repositories and images).
1）在服务端安装resistry 私有仓库
[root@Mysql img3]# yum info docker-registry [root@Mysql img3]# yum install docker-registry -y 安装 [root@Mysql img3]# rpm -ql docker-distribution 查看安装生成的文件 /etc/docker-distribution/registry/config.yml 主配置文件 /usr/bin/registry /usr/lib/systemd/system/docker-distribution.service /usr/share/doc/docker-distribution-2.6.2 /usr/share/doc/docker-distribution-2.6.2/AUTHORS /usr/share/doc/docker-distribution-2.6.2/CONTRIBUTING.md /usr/share/doc/docker-distribution-2.6.2/LICENSE /usr/share/doc/docker-distribution-2.6.2/MAINTAINERS /usr/share/doc/docker-distribution-2.6.2/README.md /var/lib/registry [root@Mysql registry]# systemctl start docker-distribution 启动服务 [root@Mysql registry]# netstat -lntup|grep registry tcp6 0 0 :::5000 :::* LISTEN 22359/registry
2）推送文件，拉取文件测试
[root@Centos7pvz2 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx 1.14-alpine 8a2fb25a19f5 9 days ago 16MB [root@Centos7pvz2 ~]# docker tag nginx:1.14-alpine pvz2.test.com:5000/nginx:1.15-alpine # 打标记为自己的仓库镜像 [root@Centos7pvz2 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE pvz2.test.com:5000/nginx 1.15-alpine 8a2fb25a19f5 9 days ago 16MB nginx 1.14-alpine 8a2fb25a19f5 9 days ago 16MB [root@Centos7pvz2 ~]# cat /etc/docker/daemon.json # 修改docker拉取服务信息 { "registry-mirrors": ["https://4mii0w1b.mirror.aliyuncs.com","https://registry.docker-cn.com"], "insecure-registries": ["pvz2.test.com:5000"] } [root@Centos7pvz2 ~]# systemctl restart docker 重启docker [root@Centos7pvz2 ~]# cat /etc/hosts # 配置主机解析文件 192.168.10.28 pvz2.test.com [root@Centos7pvz2 ~]# docker push pvz2.test.com:5000/nginx:1.15-alpine # 将本地镜像推向仓库 The push refers to repository [pvz2.test.com:5000/nginx] 076c58d2644f: Pushed b2cbae4b8c15: Pushed 5ac9a5170bf2: Pushed a464c54f93a9: Pushed 1.15-alpine: digest: sha256:a3a0c4126587884f8d3090efca87f5af075d7e7ac8308cffc09a5a082d5f4760 size: 1153 另一台机器拉取镜像 [root@node02 ~]# cat /etc/docker/daemon.json { "registry-mirrors": ["https://4mii0w1b.mirror.aliyuncs.com","https://registry.docker-cn.com"], "insecure-registries": ["pvz2.test.com:5000"] } [root@Centos7pvz2 ~]# systemctl restart docker [root@Centos7pvz2 ~]# cat /etc/hosts # 配置主机解析文件 192.168.10.28 pvz2.test.com [root@node02 ~]# docker pull pvz2.test.com:5000/nginx:1.15-alpine # 拉取镜像 1.15-alpine: Pulling from nginx bdf0201b3a05: Pull complete 3d0a573c81ed: Pull complete 8129faeb2eb6: Pull complete 3dc99f571daf: Pull complete Digest: sha256:a3a0c4126587884f8d3090efca87f5af075d7e7ac8308cffc09a5a082d5f4760 Status: Downloaded newer image for pvz2.test.com:5000/nginx:1.15-alpine [root@node02 ~]#
3）服务端可查看客户端推送过来的镜像文件
[root@Centos7pvz2 ~]# ll /var/lib/registry/docker/registry/v2/repositories/ 总用量 0 drwxr-xr-x 5 root root 55 4月 19 16:50 nginx
六、单机多容器编排
七、harbor安装（仓库网站安装）
1）安装说明
1)官网 https://github.com/goharbor/harbor 2）安装说明 https://github.com/goharbor/harbor/blob/master/docs/installation_guide.md 3）下载安装包 https://storage.googleapis.com/harbor-releases/release-1.7.0/harbor-offline-installer-v1.7.4.tgz
2）修改配置文件
3）启动服务 ./install.sh 需要docker-compose(1.7.1以上的版本)
3.1 ）安装docker-compose。注意该安装方式版本 为 docker-compose version 1.24.0, build 0aa5906 。经过测试，也可以运行
./install.sh结束后，80端口和443端口被监听
4）访问 http://192.168.10.28/harbor/sign-in
用户：admin
密码：harbor12345 / Harbor12345 官方文档有说明（harbor.cfg）
登录进来。先创建用户管理，仓库管理
5）创建用户
6）创建仓库
7）切换账号，新建项目
8）推送docker镜像文件
[root@Centos7pvz2 harbor]# cat /etc/docker/daemon.json { "registry-mirrors": ["https://4mii0w1b.mirror.aliyuncs.com","https://registry.docker-cn.com"], "insecure-registries": ["pvz2.test.com"] } [root@Centos7pvz2 harbor]# systemctl restart docker [root@Centos7pvz2 harbor]# docker tag goharbor/harbor-db:v1.7.4 pvz2.test.com/devel/harbor-db:v1.7.4 [root@Centos7pvz2 harbor]# docker tag goharbor/harbor-adminserver:v1.7.4 pvz2.test.com/devel/harbor-adminserver:v1.7.4 [root@Centos7pvz2 harbor]# docker image ls|grep pvz2.test.com/devel pvz2.test.com/devel/harbor-adminserver v1.7.4 5706c65d65dc 7 weeks ago 72.3MB pvz2.test.com/devel/harbor-db v1.7.4 08d163f732f3 7 weeks ago 136MB [root@Centos7pvz2 harbor]# docker login pvz2.test.com 登录服务器 [root@Centos7pvz2 harbor]# docker push pvz2.test.com/devel/harbor-adminserver:v1.7.4 [root@Centos7pvz2 harbor]# docker push pvz2.test.com/devel/harbor-db:v1.7.4
查看服务端，文件存储的路径
暂停容器服务
继续运行
docker资源
启动测试，256M内存，2个进程
docke stats 能查看容器资源
八、最终环节，应用实战
最终章。dokerfiles实战应用
1）快速构建基础镜像
cat Dockerfile #Docker from CentOS # Base images FROM centos # who MAINTAINER Mr.Cao 11111qq.com # EPEL add epel.repo /etc/yum.repos.d/ # Base pkg RUN yum install -y wget mysql-devel supervisor git redis tree net-tools sudo psmisc && yum clean all docker build -t test/centos:base .
1.2）基于基础镜像创建python环境
cat Dockerfile FROM test/centos:base MAINTAINER Mr.Cao 11111qq.com RUN yum install -y python-devel python-pip supervisor RUN pip install --upgrade pip docker build -t test/python .
2）基于ssh管理的基础镜像
cat Dockerfile #Docker from CentOS # Base images FROM centos # who MAINTAINER Mr.Cao 11111qq.com # EPEL add epel.repo /etc/yum.repos.d/ # Base pkg RUN yum install -y openssh-clients openssl-devel openssh-server wget mysql-devel supervisor git redis tree net-tools sudo psmisc && yum clean all # For SSHD RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key RUN ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key RUN echo "root:helloworld" | chpasswd docker build -t test/centos-ssh:base .
2.1）基于ssh的Python环境
cat Dockerfile FROM test/centos-ssh MAINTAINER Mr.Cao 11111qq.com RUN yum install -y python-devel python-pip supervisor RUN pip install --upgrade pip docker build -t test/python-ssh .
3）基于Python环境运行app
supervisord.conf文件修改
3.1) 编辑文件过程
================================================ cat app.py from flask import Flask app = Flask(__name__) @app.route('/') def hello(): return 'hello world' if __name__ == '__main__': app.run(host="0.0.0.0",debug=True) ================== cat requirements.txt flask =================== cat app-supervisor.ini [program:shop-api] command=/usr/bin/python2.7 /opt/app.py process_name=%(program_name)s autostart=true user=www stdout_logfile=/tmp/app.log stderr_logfile=/tmp/app.error [program:sshd] command=/usr/sbin/sshd -D process_name=%(program_name)s autostart=true ================== cat Dockerfile FROM test/python-ssh MAINTAINER Mr.Cao 11111qq.com RUN useradd -s /sbin/nologin -M www ADD app.py /opt/app.py ADD requirements.txt /opt/ ADD supervisord.conf /etc/supervisord.conf ADD app-supervisor.ini /etc/supervisord.d/ RUN /usr/bin/pip2.7 install /opt/requirements.txt # Port EXPOSE 22 5000 # CMD CMD ["/usr/bin/supervisord","-c","/etc/supervisord.conf"] ===============================================================
3.2）制作镜像，并启动应用服务
docker build -t test/hello-api . docker run --name hello-api -d -p 88:5000 -p 8022:22 test/hello-api
ssh服务可这样进入服务
