JEECG部署：Alpine鏡像的問題

這篇文章memo一下JEECG部署時使用Alpine鏡像會產生的問題。

Dockerfile

FROM nginx:1.18-alpine

MAINTAINER liumiao [email protected]

RUN  apk update \
     && apk add openjdk8-jre-base \
     && touch /etc/init.d/start.sh \
     && chmod +x /etc/init.d/start.sh \
     && echo "#!/bin/sh  " >> /etc/init.d/start.sh \
     && echo "/usr/sbin/nginx  -c /etc/nginx/nginx.conf" >> /etc/init.d/start.sh \
     && echo " java -jar /jeecgboot.jar   " >> /etc/init.d/start.sh

ADD jeecg-boot-module-system-2.2.0.jar jeecgboot.jar
ADD dist/ /usr/share/nginx/html/
ADD default.conf /etc/nginx/conf.d/default.conf

EXPOSE 80 8080
ENTRYPOINT /bin/sh -c   /etc/init.d/start.sh

default.conf

server {
        listen       80;
        location ^~ /jeecg-boot {
        proxy_pass              http://127.0.0.1:8080/jeecg-boot/;
        proxy_set_header        Host 127.0.0.1;
        proxy_set_header        X-Real-IP \$remote_addr;
        proxy_set_header        X-Forwarded-For \$proxy_add_x_forwarded_for;
    } 
    location / {
       root   /usr/share/nginx/html/;
        index  index.html index.htm;
        if (!-e \$request_filename) {
            rewrite ^(.*)\$ /index.html?s=\$1 last;
            break;
        }
    }
    access_log  /var/log/nginx/access.log ;
}

啓動後的問題

原因與暫定對應

看一下NoClassDefFound的類名爲sun.awt，大概率是使用Oracle的JDK能夠解決問題，而由於Oracle的JDK是基於GLIBC的，所以Alpine只好先扔下了。這也大概是JEECG的源碼裏面有一個很粗糙的Dockerfile是基於CentOS7的原因。所以直接修正一下將Dockerfile改爲基於CentOS方式的即解決了問題。詳細如下所示：

[root@liumiaocn jeecg]# cat Dockerfile
FROM centos:7

MAINTAINER liumiao [email protected]

RUN  cd /etc/yum.repos.d/ \
    && yum -y install wget \
    && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo \
    && yum clean all \
    && yum makecache \
    && yum update -y \
    && yum -y install nginx  \
    && yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel  \
    && touch /etc/init.d/start.sh \
    && touch jeecgboot.log \
    && chmod +x /etc/init.d/start.sh \
    && echo "#!/bin/bash  " >> /etc/init.d/start.sh \
    && echo "/usr/sbin/nginx  -c /etc/nginx/nginx.conf" >> /etc/init.d/start.sh \
    && echo " java -jar /jeecgboot.jar   " >> /etc/init.d/start.sh \
    && mkdir  -p  /var/www/html

ADD nginx.conf /etc/nginx/nginx.conf
ADD dist/ /var/www/html/
ADD jeecg-boot-module-system-2.2.0.jar jeecgboot.jar

EXPOSE  80  8080
ENTRYPOINT /bin/sh -c   /etc/init.d/start.sh
[root@liumiaocn jeecg]# cat nginx.conf 
# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

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

# Load dynamic modules. See /usr/share/doc/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.
  server {
        listen       80;
        location ^~ /jeecg-boot {
        proxy_pass              http://127.0.0.1:8080/jeecg-boot/;
        proxy_set_header        Host 127.0.0.1;
        proxy_set_header        X-Real-IP \$remote_addr;
        proxy_set_header        X-Forwarded-For \$proxy_add_x_forwarded_for;
    } 
    location / {
        root   /var/www/html/;
        index  index.html index.htm;
        if (!-e \$request_filename) {
            rewrite ^(.*)\$ /index.html?s=\$1 last;
            break;
        }
    }
    access_log  /var/log/nginx/access.log ;
  }

# 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 {
#        }
#    }

}
[root@liumiaocn jeecg]# 

備註

似乎通過安裝apk add ttf-dejavu能夠解決Font的問題，後續有時間會繼續確認。