docker 镜像和容器基础应用

创建镜像

centos7

• Dockerfile 文件

From centos:7.5.1804

RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
  echo 'Asia/Shanghai' > /etc/timezone  && \
  mkdir -p /home/soft  && \
  mkdir -p /home/test  && \
  localedef -i zh_CN -f UTF-8 zh_CN.UTF-8

ENV LC_ALL=zh_CN.UTF-8

• 脚本

docker build -t base-centos7:1.0.0 .

容器创建

以下容器创建和使用，主要是通过挂载目录来运行程序，这里主要利用容器的隔离性，以及各个程序开机自启无需配置系统级的服务化，只要docker启动，容器就会启动，可保证容器宕掉后自动恢复。

consul容器脚本

docker run -m 100M --memory-swap -1  -d --restart unless-stopped -p 8500:8500 \
--cpuset-cpus="0,1" \
--cap-add=ALL \
-v /home/volume/proj/:/home/data/ \
--name consul-dev base-centos7:1.0.0 \
/home/data/consul/start.sh

• 开发环境单机脚本 start.sh 文件

请先下载consul执行文件

#!/bin/bash
/home/data/consul/consul agent -server -bootstrap -node server-dev-1 -http-port 8500 -client 0.0.0.0 -bind 127.0.0.1 -ui -data-dir=/home/data/consul/data

java容器脚本

docker run -m 1g --memory-swap -1 -d --restart unless-stopped -p 8080:8080 \
--cpuset-cpus="0,1,2,3" \
--cap-add=ALL \
-v /home/volume/proj/:/home/data/ \
--name projname base-centos7:1.0.0 \
/home/data/myjava/start.sh

java 启动脚本 先在挂载目录准备好jdk，和可执行jar包

#!/bin/bash
cd /home/data/myjava/
/home/data/jdk8/jdk1.8.0_191/bin/java -Xmx1g -XX:+UseG1GC -jar myjava.jar --spring.profiles.active=test

nginx容器脚本

先使用 docker pull nginx 下载镜像

执行前先在挂载目录准备 nginx.conf 默认文件和 conf.d 目录

docker run -m 100M --memory-swap -1 -d --restart unless-stopped -p 80:80 \
-v /home/volume/proj/nginx/resources:/home/resources \
-v /home/volume/proj/nginx/config/nginx.conf:/etc/nginx/nginx.conf \
-v /home/volume/proj/nginx/config/conf.d:/etc/nginx/conf.d \
-v /home/volume/proj/nginx/log:/var/log/nginx \
--name nginx nginx

• nginx.conf 默认文件

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user root;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    server {
#        listen       80 default_server;
#        listen       [::]:80 default_server;
        server_name  _;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

#        location / {
#        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

# Settings for a TLS enabled server.
#
#    server {
#        listen       443 ssl http2 default_server;
#        listen       [::]:443 ssl http2 default_server;
#        server_name  _;
#        root         /usr/share/nginx/html;
#
#        ssl_certificate "/etc/pki/nginx/server.crt";
#        ssl_certificate_key "/etc/pki/nginx/private/server.key";
#        ssl_session_cache shared:SSL:1m;
#        ssl_session_timeout  10m;
#        ssl_ciphers HIGH:!aNULL:!MD5;
#        ssl_prefer_server_ciphers on;
#
#        # Load configuration files for the default server block.
#        include /etc/nginx/default.d/*.conf;
#
#        location / {
#        }
#
#        error_page 404 /404.html;
#            location = /40x.html {
#        }
#
#        error_page 500 502 503 504 /50x.html;
#            location = /50x.html {
#        }
#    }
}