Codeigniter mysql无法在docker中连接答案

【问题标题】：Codeigniter mysql can't connect in dockerCodeigniter mysql无法在docker中连接
【发布时间】：2018-06-10 21:35:00
【问题描述】：

Codeigniter 3.0无法连接本地mysql，请告知原因。

错误信息是 SQLSTATE [HY000] [2002] 连接被拒绝。我的 Codeigniter 正在开发 Docker。

特别是在 mac 中的 Docker

php-fpm 7.1
MySQL 5.7
Nginx 2.4

容器正在工作。

并且那个 MySQL 容器可以从 sequel pro 或者 Mac 终端连接，只有 Codeigniter 可以连接。

来自我的 Mac 终端的成功连接代码

mysql -uroot -h 127.0.0.1-P 4306 -ppassword

db_test.php

<?php
  try {

    $pdo = new PDO(
    'mysql:dbname=******;host=127.0.0.1;charset=utf8',
    'root',
    'password',
    [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    ]
   );

} catch (PDOException $e) {

   header('Content-Type: text/plain; charset=UTF-8', true, 500);
   exit($e->getMessage()); 

}

结果 -- SQLSTATE [HY000] [2002] 连接被拒绝。

/config/database.php

}elseif (strpos($_SERVER['SERVER_NAME'],'myname') !== false && ENVIRONMENT != "test"){
// MyLocal Setting
$db['default'] = array(
        'dsn'   => '',
        'hostname' => '127.0.0.1',
  'port' => '4306',
        'username' => 'root',
        'password' => 'password',
        'database' => '******',
        'dbdriver' => 'mysqli',
        'dbprefix' => '',
        'pconnect' => FALSE,
        'db_debug' => TRUE,
        'cache_on' => FALSE,
        'cachedir' => '',
        'char_set' => 'utf8',
        'dbcollat' => 'utf8_general_ci',
        'swap_pre' => '',
        'encrypt' => FALSE,
        'compress' => FALSE,
        'stricton' => FALSE,
        'failover' => array(),
        'save_queries' => TRUE
);

docker-compose.yml

 version: '2'
   services:
     memcached:
     image: memcached:1.4

   data:
    image: busybox
    volumes:
      - ./misc/data:/var/lib/mysql

  mysql:
    image: mysql:5.7
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: mysql_database
      MYSQL_USER: mysql_user
      MYSQL_PASSWORD: mysql_pw
      socket: /var/run/mysqld/mysqld.sock
    ports:
      - "4306:3306"
    volumes_from:
      - data
    volumes:
      - ../application/initial.sql:/docker-entrypoint-initdb.d/initial.sql
    container_name: mysql
nginx:
    build: ./nginx
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf
    links:
      - web
    container_name: nginx
    environment:
     - CI_ENV=localhost

  web:
    build: ./php-fpm71
#    build: ./php-fpm56    <- if you want to use PHP5.6
    volumes:
      - /Users/alberorana/codeigniter/suke10:/var/www/html/suke10
      - ./php-fpm71/php.ini:/usr/local/etc/php/conf.d/php.ini
    links:
      - mysql
    environment:
      DATABASE_HOST: '0.0.0.0'
      DATABASE_NAME: 'suke10'
      DATABASE_USER: 'root'
      DATABASE_PASSWORD: 'password'
    container_name: web

mysql容器中的etc/mysql/mysql.conf.d/mysqld.cnf

[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
#log-error      = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address   = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

【问题讨论】：

作为/config/database.php 的本地地址，将'port' => '4306', 更改为'port' => '3306',，您只能从网桥外部连接4306，例如您的笔记本电脑。
由于 db_test.php 没有使用 CodeIgniter 数据库库，我认为问题不在于 CodeIgniter。
谢谢！我试过3306端口，结果还是一样。
@YumaUchida 您尝试从 php 容器内部连接 host=127.0.0.1？（您需要使用 mysql 容器的名称（= mysql）而不是 localhost 进行连接。因为 php 容器内部的 localhost 与您可以连接到数据库的机器上的 localhost 不同。这个博客可能是有用的：lvthillo.com/…
@lvthillo 完全正确。谢谢。

标签： php mysql codeigniter docker nginx

【解决方案1】：

你在 php 容器中的数据库连接是：

 mysql:3306

由于您在您的编译器文件中，将 phpcontainer “链接”到数据库容器，并且链接是在您的主机文件中添加一行，因此 mysql 将为您指向内部 docker-network 中的 ip .

【讨论】：

【解决方案2】：

@lvthillo 我们可以通过将主机设置设置为 mysql 容器来连接！

'mysql:dbname=******;host=mysql;charset=utf8'

【讨论】：

【解决方案3】：

docker-compose.yml

version: "3"

services:
  webserver:
    build: 
      context: ./bin/webserver
    container_name: '7.3.x-webserver'
    restart: 'always'
    ports:
      - "${HOST_MACHINE_UNSECURE_HOST_PORT}:80"
      - "${HOST_MACHINE_SECURE_HOST_PORT}:443"
    links: 
      - mysql
    volumes: 
      - ${DOCUMENT_ROOT-./www}:/var/www/html
      - ${PHP_INI-./config/php/php.ini}:/usr/local/etc/php/php.ini
      - ${VHOSTS_DIR-./config/vhosts}:/etc/apache2/sites-enabled
      - ${LOG_DIR-./logs/apache2}:/var/log/apache2
  mysql:
    build:
      context: "./bin/${DATABASE}"
    container_name: '5.7-mysql'
    restart: 'always'
    ports:
      - "${HOST_MACHINE_MYSQL_PORT}:3306"
    volumes: 
      - ${MYSQL_DATA_DIR-./data/mysql}:/var/lib/mysql
      - ${MYSQL_LOG_DIR-./logs/mysql}:/var/log/mysql
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
      MYSQL_DATABASE: ${MYSQL_DATABASE}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: 'sc-phpmyadmin'
    links:
      - mysql
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3306
      PMA_USER: ${MYSQL_USER}
      PMA_PASSWORD: ${MYSQL_PASSWORD}
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
    ports:
      - '8080:80'
    volumes: 
      - /sessions
  redis:
    container_name: 'sc-redis'
    image: redis:latest
    ports:
      - "${HOST_MACHINE_REDIS_PORT}:6379"

/project/application/config/database.php

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'mysql',
    'username' => 'root',
    'password' => 'tiger',
    'database' => 'docker',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

mysql 是服务的名称（mysql 容器）&& 使用与我的主机名相同的名称

【讨论】：