Dockerfile configuration tutorial generates Docker image and implements Docker deployment

Docker there's a dockerfile, why should we use him?

To put it simply: we used to Docker run to create a Docker container that sometimes comes with a lot of parameters.

Like what:

The code is as follows	Copy Code
Docker run-d-P 22-p 8080:8080 Ruifengyun/ubunt-redis "Redis-server redis.conf &&/usr/sbin/sshd-d"

Will find it very troublesome. This time we can create an edit Dockerfile file, generate a new image, and then create a container from this new image, with the associated startup items and ports inside the container, and the directory is well defined in advance.

Cat Dockerfile

code is as follows	copy code
#配置redis From Ubuntu Maintainer Ruifengyun "ruifengyun@qq.com" ADD ./start.sh /root/start.sh RUN apt-get Update Run Apt-get install-y redis-server Run apt-get install-y openssh-server #CMD Redis-server/etc/redis/redis. conf &&/usr/sbin/sshd-d CMD ["Redis-server", "/etc/redis/redis.conf"] Expose 6379 Expose

From is the basis for mirroring

RUN can be understood to do some deployment of the environment in the from-down mirror.

CMD is the command that will run after the container is created

Expose is the exposed port.

Maintainer notification of messages

ADD is the equivalent of the host's start.sh script passed to the container inside.

VOLUME is a map of the local path

Workdir is the path of execution, which is the path that CMD entrypoint executes.

The code is as follows

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root@dev-ops:/var/4# Docker Build-t Rui Dockerfile Uploading Context 2.048 KB Uploading context 2014/08/16 09:50:59 error:open/tmp/docker-build829651796/dockerfile:not a directory root@dev-ops:/var/4# Docker build-t Rui/redis. Uploading context 2.56 KB Uploading context Step 0:from Ubuntu ---> c4ff7513909d Step 1:maintainer Victor Coisne victor.coisne@dotcloud.com ---> Using cache ---> BBE0C91632F1 Step 2:run apt-get Update ---> Running in B10A1A60DCB3 IGN http://archive.ubuntu.com Trusty Inrelease IGN http://archive.ubuntu.com trusty-updates Inrelease IGN http://archive.ubuntu.com trusty-security Inrelease Get:1 http://archive.ubuntu.com trusty RELEASE.GPG [933 B] Get:2 http://archive.ubuntu.com trusty-updates release.gpg [933 B] Get:3 http://archive.ubuntu.com trusty-security release.gpg [933 B] Get:4 http://archive.ubuntu.com trusty release [58.5 KB] Get:5 http://archive.ubuntu.com trusty-updates release [59.7 KB] Get:6 http://archive.ubuntu.com trusty-security release [59.7 KB] Get:7 http://archive.ubuntu.com trusty/main Sources [1335 KB] Get:8 http://archive.ubuntu.com trusty/restricted Sources [5335 B] Get:9 http://archive.ubuntu.com trusty/universe Sources [7926 KB] Get:10 http://archive.ubuntu.com trusty/main amd64 Packages [1743 KB] Get:11 http://archive.ubuntu.com trusty/restricted amd64 Packages [16.0 KB] Get:12 http://archive.ubuntu.com trusty/universe amd64 Packages [7589 KB] Get:13 http://archive.ubuntu.com trusty-updates/main Sources [138 KB] get:14 http://archive.ubuntu.com trusty-updates/restricted Sources [1250 B] get:15 http://archive.ubuntu.com trusty-updates/universe Sources [91.7 KB] Get:16 http://archive.ubuntu.com trusty-updates/main amd64 Packages [375 KB] Get:17 http://archive.ubuntu.com trusty-updates/restricted amd64 Packages [6341 B] Get:18 http://archive.ubuntu.com trusty-updates/universe amd64 Packages [235 KB] get:19 http://archive.ubuntu.com trusty-security/main Sources [47.4 KB] get:20 http://archive.ubuntu.com trusty-security/restricted Sources [B] get:21 http://archive.ubuntu.com trusty-security/universe Sources [11.9 KB] get:22 http://archive.ubuntu.com trusty-security/main amd64 Packages [167 KB] get:23 http://archive.ubuntu.com trusty-security/restricted amd64 Packages [B] get:24 http://archive.ubuntu.com trusty-security/universe amd64 Packages [57.0 KB] Fetched 19.9 MB in 11min 48s (28.1 kb/s) Reading Package Lists ... ---> 9ce87ae24eeb Step 3:run apt-get install-y redis-server ---> Running in b28a88665c3f Reading Package Lists ... Building Dependency Tree ... Reading state information ... The following extra packages would be installed: Libjemalloc1 Redis-tools The following NEW packages would be installed: Libjemalloc1 Redis-server Redis-tools 0 upgraded, 3 newly installed, 0 to remove and 3 not upgraded. Need to get 410 KB of archives. After this operation, 1272 KB of additional disk space would be used. Get:1 http://archive.ubuntu.com/ubuntu/trusty/universe libjemalloc1 amd64 3.5.1-2 [76.8 KB] Get:2 http://archive.ubuntu.com/ubuntu/trusty/universe redis-tools amd64 2:2.8.4-2 [65.7 KB] Get:3 http://archive.ubuntu.com/ubuntu/trusty/universe redis-server amd64 2:2.8.4-2 [267 KB] Debconf:unable to initialize Frontend:dialog Debconf: (TERM is isn't set, so the dialog frontend are not usable.) Debconf:falling Back to Frontend:readline Debconf:unable to initialize Frontend:readline Debconf: (This frontend requires a controlling tty.) Debconf:falling Back to Frontend:teletype Dpkg-preconfigure:unable to re-open stdin: Fetched 410 KB in 4s (91.4 kb/s) Selecting previously unselected package Libjemalloc1. (Reading database ...) 11518 files and directories currently installed.) Preparing to unpack .../libjemalloc1_3.5.1-2_amd64.deb ... Unpacking Libjemalloc1 (3.5.1-2) ... Selecting previously unselected package redis-tools. Preparing to unpack .../redis-tools_2%3a2.8.4-2_amd64.deb ... Unpacking Redis-tools (2:2.8.4-2) ... Selecting previously unselected package redis-server. Preparing to unpack .../redis-server_2%3a2.8.4-2_amd64.deb ... Unpacking Redis-server (2:2.8.4-2) ... Processing triggers for ureadahead (0.100.0-16) ... Setting up Libjemalloc1 (3.5.1-2) ... Setting up Redis-tools (2:2.8.4-2) ... Setting up Redis-server (2:2.8.4-2) ... Invoke-rc.d:policy-rc.d denied execution of the start. Processing triggers for Libc-bin (2.19-0ubuntu6.1) ... Processing triggers for ureadahead (0.100.0-16) ... ---> d37fb2bbe0b5 Step 4:entrypoint redis-server/etc/redis/redis.conf &&/usr/sbin/sshd-d ---> Running in f6c027ac643d ---> ec7fe19bdfed Step 5:user Daemon ---> Running in 0e3b10d07a16 ---> d16398d08a4a Step 6:expose 6379 ---> Running in c8ca52dde189 ---> e0a9bcb25972 Step 7:expose 22 ---> Running in 22845a6abd90 ---> 54bb130c7a44 Successfully built 54bb130c7a44 Removing intermediate container B10A1A60DCB3 Removing intermediate container b28a88665c3f Removing intermediate container f6c027ac643d Removing intermediate container 0e3b10d07a16 Removing intermediate container c8ca52dde189 Removing intermediate container 22845a6abd90 root@dev-ops:/var/4#

When the toss is over, he will generate a mirror image. This mirror is made by our dockerfile.



This time we'll create the container without adding so many parameters.

The code is as follows	Copy Code
root@dev-ops:~# Docker run-d-P Rui 116b30b056493237caca158849ae687c9beb4f8656be485c2a3cc71a27d8e951 root@dev-ops:~# root@dev-ops:~# root@dev-ops:~# Docker Ps-a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 116b30b05649 rui:latest redis-server/etc/redis/redis.conf 4 seconds ago up 3 seconds 0.0.0.0:49153->6379/tcp Nostalgic_lumiere

Let's have a more complete dockerfile example:

Features are used to deploy LNMP and WordPress, the configuration looks more, in fact, or more standardized.

The code is as follows

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From ubuntu:14.04 Maintainer Liudehua <liudehua@xxx.com> # Keep upstart from complaining RUN Dpkg-divert--local--rename--add/sbin/initctl RUN Ln-sf/bin/true/sbin/initctl # Let the Conatiner know so there is no TTY ENV Debian_frontend noninteractive RUN apt-get Update RUN apt-get-y Upgrade # Basic Requirements RUN apt-get-y Install mysql-server mysql-client nginx php5-fpm php5-mysql php-apc pwgen python-setuptools Curl git unzip # Wordpress Requirements RUN apt-get-y Install Php5-curl php5-gd php5-intl php-pear php5-imagick php5-imap php5-mcrypt php5-memcache php5-ming php 5-ps Php5-pspell php5-recode php5-sqlite php5-tidy php5-xmlrpc # mysql Config RUN sed-i-E "s/^bind-addresss*=s*127.0.0.1/bind-address = 0.0.0.0/"/etc/mysql/my.cnf # nginx Config RUN sed-i-E "S/keepalive_timeouts*65/keepalive_timeout 2/"/etc/nginx/nginx.conf RUN sed-i-E "s/keepalive_timeout 2/keepalive_timeout 2;ntclient_max_body_size 100m/"/etc/nginx/nginx.conf RUN echo "daemon off;" >>/etc/nginx/nginx.conf # PHP-FPM Config RUN sed-i-E "s/;cgi.fix_pathinfo=1/cgi.fix_pathinfo=0/g"/etc/php5/fpm/php.ini RUN sed-i-E "s/upload_max_filesizes*=s*2m/upload_max_filesize = 100m/g"/etc/php5/fpm/php.ini RUN sed-i-E "s/post_max_sizes*=s*8m/post_max_size = 100m/g"/etc/php5/fpm/php.ini RUN sed-i-E "s/;d aemonizes*=s*yes/daemonize = no/g"/etc/php5/fpm/php-fpm.conf RUN sed-i-E "s/;catch_workers_outputs*=s*yes/catch_workers_output = yes/g"/etc/php5/fpm/pool.d/www.conf RUN find/etc/php5/cli/conf.d/-name "*.ini"-exec sed-i-re ' s/^ (s*) # (. *)/1;2/g ' {}; # nginx Site conf ADD./nginx-site.conf/etc/nginx/sites-available/default # Supervisor Config Run/usr/bin/easy_install Supervisor Run/usr/bin/easy_install Supervisor-stdout ADD./supervisord.conf/etc/supervisord.conf # Install Wordpress ADD http://wordpress.org/latest.tar.gz/usr/share/nginx/latest.tar.gz RUN cd/usr/share/nginx/&& tar xvf latest.tar.gz && rm latest.tar.gz RUN mv/usr/share/nginx/html/5*/usr/share/nginx/wordpress RUN rm-rf/usr/share/nginx/www RUN mv/usr/share/nginx/wordpress/usr/share/nginx/www RUN Chown-r www-data:www-data/usr/share/nginx/www # Wordpress initialization and Startup Script ADD./start.sh/start.sh RUN chmod 755/start.sh # Private Expose Expose 3306 Expose 80 CMD ["/bin/bash", "/start.sh"]

Another example of a mognodb:

Note: You can wrap lines with identities

code is as follows

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from Dockerfile/ubuntu   # Install MongoDB. RUN   Apt-key adv--keyserver hkp://keyserver.ubuntu.com:80--recv 7f0ceb10 &&   Echo ' Deb Htt P://downloads-distro.mongodb.org/repo/ubuntu-upstart Dist 10gen ' | Tee/etc/apt/sources.list.d/mongodb.list &&   apt-get update &&   Apt-get install-y m ongodb-org &&   mkdir-p/data/db   VOLUME ["/data"]   Workdir/data   ; CMD ["Mongod"]   Expose 27017 expose 28017

The

website has a lot of examples, interested friends can go to Https://github.com/dockerfile view.


Use cmd in dockerfile, entrypoint need to note:


Cmd is a model that can be written as a shell, that is, we usually write statements like

cmd  redis-s erver redis.conf && Service sshd restart


Docker called when it was invoked by/bin/sh-c.   This time there are a few problems, we test the time, the best in their own machine also measured general.   Sh-c This thing is very strange, seemingly his parameters punctuation problem, some eggs pain.


Generally, when you start with cmd   use exec's mode more points, that is, [' Redis-server ', '/etc/redis/redis.conf '] he will use a space to form a command.  


A dockerfile can have only one cmd inside. It's no use writing too much.