基于alpine用dockerfile创建的爬虫Scrapy镜像的实现
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2022-04-25 17:20:52
一、下载alpine镜像
[root@dockerbrian ~]# docker pull alpine
using default tag: lates...
一、下载alpine镜像
[root@dockerbrian ~]# docker pull alpine using default tag: latest trying to pull repository docker.io/library/alpine ... latest: pulling from docker.io/library/alpine 4fe2ade4980c: pull complete digest: sha256:621c2f39f8133acb8e64023a94dbdf0d5ca81896102b9e57c0dc184cadaf5528 status: downloaded newer image for docker.io/alpine:latest [root@docker43 ~]# docker images repository tag image id created size docker.io/alpine latest 196d12cf6ab1 3 weeks ago 4.41 mb
二、编写dockerfile
创建scrapy目录存放dockerfile文件
[root@dockerbrian ~]# mkdir /opt/alpinedockerfile/ [root@dockerbrian ~]# cd /opt/alpinedockerfile/ [root@dockerbrian alpinedockerfile]# mkdir scrapy && cd scrapy && touch dockerfile [root@dockerbrian alpinedockerfile]# cd scrapy/ [root@dockerbrian scrapy]# ll 总用量 4 -rw-r--r-- 1 root root 1394 10月 10 11:36 dockerfile
编写dockerfile文件
# 指定创建的基础镜像 from alpine # 作者描述信息 maintainer alpine_python3_scrapy (zhujingzhi@123.com) # 替换阿里云的源 run echo "http://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories && \ echo "http://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories # 同步时间 # 更新源、安装openssh 并修改配置文件和生成key 并且同步时间 run apk update && \ apk add --no-cache openssh-server tzdata && \ cp /usr/share/zoneinfo/asia/shanghai /etc/localtime && \ sed -i "s/#permitrootlogin.*/permitrootlogin yes/g" /etc/ssh/sshd_config && \ ssh-keygen -t rsa -p "" -f /etc/ssh/ssh_host_rsa_key && \ ssh-keygen -t ecdsa -p "" -f /etc/ssh/ssh_host_ecdsa_key && \ ssh-keygen -t ed25519 -p "" -f /etc/ssh/ssh_host_ed25519_key && \ echo "root:h056zhjlg85ow5xh7vtsa" | chpasswd # 安装scrapy依赖包(必须安装的依赖包) run apk add --no-cache python3 python3-dev gcc openssl-dev openssl libressl libc-dev linux-headers libffi-dev libxml2-dev libxml2 libxslt-dev openssh-client openssh-sftp-server # 安装环境需要pip包(这里的包可以按照需求添加或者删除) run pip3 install --default-timeout=100 --no-cache-dir --upgrade pip setuptools pymysql pymongo redis scrapy-redis ipython scrapy requests # 启动ssh脚本 run echo "/usr/sbin/sshd -d" >> /etc/start.sh && \ chmod +x /etc/start.sh # 开放22端口 expose 22 # 执行ssh启动命令 cmd ["/bin/sh","/etc/start.sh"]
实现了容器可以ssh远程访问 基于python3 环境安装的scrapy,通过start.sh脚本启动ssh服务
三、创建镜像
创建镜像
[root@dockerbrian scrapy]# docker build -t scrapy_redis_ssh:v1 .
查看镜像
[root@dockerbrian scrapy]# docker images repository tag image id created size scrapy_redis_ssh v1 b2c95ef95fb9 4 hours ago 282 mb docker.io/alpine latest 196d12cf6ab1 4 weeks ago 4.41 mb
四、创建容器
创建容器(名字为scrapy10086 远程端口是映射宿主机10086端口)
复制代码 代码如下:
docker run -itd --restart=always --name scrapy10086 -p 10086:22 scrapy_redis_ssh:v1
查看容器
[root@dockerbrian scrapy]# docker ps container id image command created status ports names 7fb9e69d79f5 b2c95ef95fb9 "/bin/sh /etc/star..." 3 hours ago up 3 hours 0.0.0.0:10086->22/tcp scrapy10086
登录容器
[root@dockerbrian scrapy]# ssh root@127.0.0.1 -p 10086 the authenticity of host '[127.0.0.1]:10086 ([127.0.0.1]:10086)' can't be established. ecdsa key fingerprint is sha256:wc46au6sljhyefqwx6d6ht9mdpgkodemok6/concpxk. ecdsa key fingerprint is md5:6a:b7:31:3c:63:02:ca:74:5b:d9:68:42:08:be:22:fc. are you sure you want to continue connecting (yes/no)? yes warning: permanently added '[127.0.0.1]:10086' (ecdsa) to the list of known hosts. root@127.0.0.1's password: # 这里的密码就是dockerfile中定义的 echo "root:h056zhjlg85ow5xh7vtsa" | chpasswd welcome to alpine! the alpine wiki contains a large amount of how-to guides and general information about administrating alpine systems. see <http://wiki.alpinelinux.org>. you can setup the system with the command: setup-alpine you may change this message by editing /etc/motd. 7363738cc96a:~#
五、测试
创建个scrapy项目测试
7363738cc96a:~# scrapy startproject test new scrapy project 'test', using template directory '/usr/lib/python3.6/site-packages/scrapy/templates/project', created in: /root/test you can start your first spider with: cd test scrapy genspider example example.com 7363738cc96a:~# cd test/ 7363738cc96a:~/test# ls scrapy.cfg test 7363738cc96a:~/test# cd test/ 7363738cc96a:~/test/test# ls __init__.py __pycache__ items.py middlewares.py pipelines.py settings.py spiders 7363738cc96a:~/test/test#
测试成功
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