docker pull 拉取所需指定版本的镜像

[root@VM-4-3-rockylinux ~]# docker images                                                                                                                                                                                                                         
IMAGE               ID             DISK USAGE   CONTENT SIZE   EXTRA
caddy:2.11-alpine   c006ba74d79d       76.8MB         20.8MB    U
gogs/gogs:0.12.9    0979e2a099f2        131MB         43.7MB    U
mariadb:10.1.48     1205b21b7138        486MB          113MB    U
php:5.6.40-fpm      4f070f1b7b93        495MB          126MB    U

数据库 docker-compose.yml:

[root@VM-4-3-rockylinux mariadb]# nl db.yaml
     1  # Use root/example as user/password credentials

     2  services:

     3    db:
     4      image: mariadb:10.1.48
     5      restart: always
     6      environment:
     7        MARIADB_ROOT_PASSWORD: xxxxx
     8        MYSQL_ROOT_PASSWORD: xxxxx
     9      volumes:
    10        - /root/mariadb/data/:/var/lib/mysql:z
    11        - /root/mariadb/run/:/var/run/mysqld:z
    12      ports:
    13        - "172.17.0.1:3306:3306" #使用docker ip

php docker-compose.yml:

[root@VM-4-3-rockylinux php]# nl php.yaml
     1  # Use root/example as user/password credentials

     2  services:

     3    php:
     4      image: php:5.6.40-fpm
     5      restart: always

     9      command: php-fpm #启动php-fpm 进程
    10      volumes:
    11        - /root/php/cfg/www.conf:/usr/local/etc/php-fpm.d/www.conf
    12        - /root/caddy/wwwroot:/home:Z #挂载caddy webroot，同一路径
    13      ports:
    14        - "127.0.0.1:9000:9000"

镜像内php默认mod 缺少 pdo_mysql 和 gd，使用官方提供的 docker-php-ext-configure 和 docker-php-ext-install 命令安装,
docker 内安装 pdo_mysql:
docker-php-ext-configure pdo_mysql && docker-php-ext-install pdo_mysql
docker 内安装 gd:
需要安装 libjpeg62-turbo-dev 和 libpng-dev 依赖
docker-php-ext-configure gd && docker-php-ext-install gd

安装完毕后:

[root@VM-4-3-rockylinux ~]# docker exec ddd138aef61b php-fpm -v
PHP 5.6.40 (fpm-fcgi) (built: Jan 23 2019 00:16:23)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
[root@VM-4-3-rockylinux ~]# docker exec ddd138aef61b php-fpm -m
[PHP Modules]
cgi-fcgi
Core
ctype
curl
date
dom
ereg
fileinfo
filter
ftp
gd
hash
iconv
json
libxml
mbstring
mhash
mysqlnd
openssl
pcre
PDO
pdo_mysql
pdo_sqlite
Phar
posix
readline
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
zlib

[Zend Modules]

具体支持的php mod 可以看：
https://github.com/mlocati/docker-php-extension-installer?tab=readme-ov-file#supported-php-extensions

caddy docker-compose.yml:

[root@VM-4-3-rockylinux caddy]# nl caddy.yaml
     1  # Use root/example as user/password credentials

     2  services:

     3    caddy:
     4      image: caddy:2.11-alpine
     5      user: root
     6      restart: always

    10      volumes:
    11        - /root/caddy/conf:/etc/caddy
    12        - /root/caddy/wwwroot:/home:Z #挂载caddy webroot，同一路径
    13        - /root/caddy/caddy_data:/data
    14        - /root/caddy/caddy_config:/config
    15      network_mode: host

gogs docker-compose.yml:

[root@VM-4-3-rockylinux gogs]# nl gogs.yaml
     1  # Use root/example as user/password credentials

     2  services:

     3    gogs:
     4      image: gogs/gogs:0.12.9
     5      restart: always

     9      volumes:
    10        - /root/gogs/data:/data:Z
    11      ports:
    12        - "127.0.0.1:3000:3000"
    13        - "127.0.0.1:22:22"

服务运行OK:

[root@VM-4-3-rockylinux ~]# docker compose ls
NAME                STATUS              CONFIG FILES
caddy               running(1)          /root/caddy/caddy.yaml
gogs                running(1)          /root/gogs/gogs.yaml
mariadb             running(1)          /root/mariadb/db.yaml
php                 running(1)          /root/php/php.yaml