这个周末上线一个帮朋友做的网站，遇到挺多坑，记录一下

摘要：因为这次上线的网站没有什么并发量，方式要比的方式快而且消耗资源少，所以我还是采用方式。

</>复制代码 
目前没什么活动，三年1400软妹币

</>复制代码 
增加本机ssh连接配置，一般激活实例后，ssh的22端口是默认开放的，可以直接通过root用户进行登录配置部署环境
登录到服务器后，将自己的公钥加入到 ~/.ssh/authorized_keys 配置文件中就可直接通过秘钥进行登录

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服务器系统版本：CentOS Linux release 7.4.1708 (Core)
内存：1G
CPU：1核
硬盘：40G

因为服务器配置有点低，所以这边选择安装比较低的mysql版本。从CentOS 7.0发布以来，yum源中开始使用mariadb来代替MySQL的安装。即使你输入的是yum install mysql , 显示的也是mariadb的安装内容，因此，如果使用yum安装MySQL的话，就需要去下载官方指定的yum源。
网址： https://dev.mysql.com/downloads/repo/yum/。

先卸载mariadb，查看mariadb是否已经安装

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[root@iZbp17dq2xryqoixibq5u1Z ~]#  yum list installed | grep mariadb
mariadb-libs.x86_64                     1:5.5.56-2.el7                 @anaconda

进行卸载

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[root@iZbp17dq2xryqoixibq5u1Z ~]# yum -y remove mariadb*
Loaded plugins: fastestmirror
Resolving Dependencies
......     **省略过程**
Removed:
  mariadb-libs.x86_64 1:5.5.56-2.el7
Dependency Removed:
  postfix.x86_64 2:2.10.1-6.el7                                                                redhat-lsb-core.x86_64 0:4.1-27.el7.centos.1
Complete!

获取yum源和数据库安装（官方指南）

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wget http://repo.mysql.com/yum/mysql-5.5-community/el/6/x86_64/mysql-community-release-el6-5.noarch.rpm     #MySQL5.5yum源

安装yum源

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rpm -ivh mysql-5.5-community/el/6/x86_64/mysql-community-release-el6-5.noarch.rpm 

安装好yum源后，需要修改一下配置文件，文件路径在 /etc/yum.repos.d/mysql-community.repo，要将5.5的enabled改为1，而5.6的enabled改为0

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# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Note: MySQL 5.7 is currently in development. For use at your own risk.
# Please read with sub pages: https://dev.mysql.com/doc/relnotes/mysql/5.7/en/
[mysql57-community-dmr]
name=MySQL 5.7 Community Server Development Milestone Release
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

修改后保存退出，开始安装MySQL。在安装之前，可以查看下是否已有MySQL可安装文件

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z ~]# yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64 MySQL Connectors Community                  49
mysql-tools-community/x86_64      MySQL Tools Community                       61
mysql55-community/x86_64          MySQL 5.5 Community Server                 449

安装mysql

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# 安装client，devel，server
yum install mysql-community-client mysql-community-devel mysql-community-server

安装完毕后，可以查看下当前mysql版本

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[root@iZbp17dq2xryqoixibq5u1Z ~]# rpm -qi mysql-community-server
Name        : mysql-community-server
Version     : 5.5.60
Release     : 2.el6
Architecture: x86_64
Install Date: 2018年05月05日 星期六 16:26:00
......

启动mysql

执行 service mysqld start 启动mysql

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z ~]# service mysqld start
Starting mysqld (via systemctl):                           [  OK  ]

ok，mysql安装完毕

</>复制代码 
常用命令：
systemctl start mysqld    #启动mysqld
systemctl stop mysqld    #停止mysqld
systemctl restart mysqld    #重启mysqld
systemctl enable mysqld   #设置开机启动
systemctl status mysqld    #查看 MySQL Server 状态

数据库安全设置
设置mysql root账户密码

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# mysqladmin -u root password "new password"

重新登录mysql报如下错误

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ERROR 1045 (28000): Access denied for user "root"@"localhost" (using password: YES)

执行如下命令进行解决

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[root@iZbp17dq2xryqoixibq5u1Z ~]# systemctl stop mysqld        **关闭mysql服务**
[root@iZbp17dq2xryqoixibq5u1Z ~]# mysqld --user=root --skip-grant-tables &        **关闭skip-grant-tables**
[1] 32163
[root@iZbp17dq2xryqoixibq5u1Z ~]# 180505 16:57:08 [Note] mysqld (mysqld 5.5.60) starting as process 32163 ...
180505 16:57:08 [Note] Plugin "FEDERATED" is disabled.
180505 16:57:08 InnoDB: The InnoDB memory heap is disabled
180505 16:57:08 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180505 16:57:08 InnoDB: Compressed tables use zlib 1.2.3
180505 16:57:08 InnoDB: Using Linux native AIO
180505 16:57:08 InnoDB: Initializing buffer pool, size = 128.0M
180505 16:57:08 InnoDB: Completed initialization of buffer pool
180505 16:57:08 InnoDB: highest supported file format is Barracuda.
180505 16:57:08  InnoDB: Waiting for the background threads to start
180505 16:57:09 InnoDB: 5.5.60 started; log sequence number 1595675
180505 16:57:09 [Note] Server hostname (bind-address): "0.0.0.0"; port: 3306
180505 16:57:09 [Note]   - "0.0.0.0" resolves to "0.0.0.0";
180505 16:57:09 [Note] Server socket created on IP: "0.0.0.0".
180505 16:57:09 [Note] mysqld: ready for connections.
Version: "5.5.60"  socket: "/var/lib/mysql/mysql.sock"  port: 3306  MySQL Community Server (GPL)
mysql -u root mysql        **空密码登入**
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.5.60 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type "help;" or "h" for help. Type "c" to clear the current input statement.
mysql> UPDATE user SET authentication_string=PASSWORD("new password") where USER="root";        **重新设置root密码**
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0
mysql> FLUSH PRIVILEGES;        **刷新设置**
Query OK, 0 rows affected (0.00 sec)
mysql> quit
Bye

开始安装PHP和PHP-FPM
首先安装EPEL。EPEL即Extra Packages for Enterprise Linux的简称，是为企业级Linux提供的一组高质量的额外软件包

</>复制代码 
yum -y install epel-release

安装PHP和PHP-FPM

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yum -y install php php-fpm

查看PHP版本

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[root@iZbp17dq2xryqoixibq5u1Z ~]# php -v
PHP 5.4.16 (cli) (built: Mar  7 2018 13:34:47)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies

这时发现PHP版本是5.4的，原因是yum默认的epel-release源太低了，而我需要部署的网站是基于Laravel5.5开发的，环境要求：

</>复制代码 
PHP >= 7.0.0        需要重新安装PHP7
PHP OpenSSL 扩展
PHP PDO 扩展
PHP Mbstring 扩展
PHP Tokenizer 扩展
PHP XML 扩展

删除之前安装的PHP版本

</>复制代码 
yum remove php* php-common

我们需要更换下rpm源，搜索epel-release源并删除后进行更新

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[root@iZbp17dq2xryqoixibq5u1Z ~]# rpm -qa | grep epel
epel-release-7-11.noarch
[root@iZbp17dq2xryqoixibq5u1Z ~]# rpm -e epel-release-7-11.noarch
warning: /etc/yum.repos.d/epel.repo saved as /etc/yum.repos.d/epel.repo.rpmsave
[root@iZbp17dq2xryqoixibq5u1Z ~]# rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm
Retrieving https://mirror.webtatic.com/yum/el7/epel-release.rpm
warning: /var/tmp/rpm-tmp.PHnPwl: Header V4 RSA/SHA1 Signature, key ID 62e74ca5: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:epel-release-7-5                 ################################# [100%]
[root@iZbp17dq2xryqoixibq5u1Z ~]# rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
Retrieving https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
warning: /var/tmp/rpm-tmp.ohTozh: Header V4 RSA/SHA1 Signature, key ID 62e74ca5: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:webtatic-release-7-3             ################################# [100%]

重新安装PHP和一些相关扩展

</>复制代码 
yum install php72w-cli.x86_64 php72w-common.x86_64 php72w-gd.x86_64 php72w-ldap.x86_64 php72w-mbstring.x86_64 php72w-pdo.x86_64

安装PHP-FPM

</>复制代码 
yum install php72w-fpm

再次查看PHP版本

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z ~]# php -v
PHP 7.2.4 (cli) (built: Mar 30 2018 08:49:13) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

启动PHP-FPM

</>复制代码 
systemctl start php-fpm
systemctl enable php-fpm.service        **开机自启动**

常用命令：

</>复制代码 
systemctl start php-fpm        # 启动 
systemctl stop php-fpm        # 停止 
systemctl restart php-fpm        # 重启
systemctl enable php-fpm        #开机自启动

开始安装Nginx

</>复制代码 
yum install nginx

安装完毕后，启动Nginx

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systemctl start nginx
systemctl enable nginx        **系统启动时自动启动Nginx**

常用命令：

</>复制代码 
fuser -k 80/tcp                     # 杀死80端口 
nginx -s stop      # 停止
nginx -s reopen    # 重启 
nginx -s reload    # 重新载入配置文件

</>复制代码 
ssh-keygen -t rsa

提示一直回车就行，将生成的秘钥添加到项目托管的git库网站上，因为我的网站是放在Coding上，我直接添加在了项目部署秘钥

通过 git clone 命令将项目拉取到服务器上，我这边因为是Nginx，所以我拉取到 /var/www/ 目录下，

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z project_fjylhjjsyxgs]# curl -sS https://getcomposer.org/installer | php
All settings correct for using Composer
Downloading...
Composer (version 1.6.5) successfully installed to: /var/www/project_fjylhjjsyxgs/composer.phar
Use it: php composer.phar

移动composer.phar文件到/usr/local/bin目录下 ，使命令全局可用，并更换Packagist中国全量镜像

</>复制代码 
mv composer.phar /usr/local/bin/composer
composer config -g repo.packagist composer https://packagist.phpcomposer.com

通过composer安装项目依赖，但是出现了报错

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z project_fjylhjjsyxgs]# composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.
  Problem 1
    - Installation request for phar-io/manifest 1.0.1 -> satisfiable by phar-io/manifest[1.0.1].
    - phar-io/manifest 1.0.1 requires ext-dom * -> the requested PHP extension dom is missing from your system.
  Problem 2
    - Installation request for phpunit/php-code-coverage 5.3.0 -> satisfiable by phpunit/php-code-coverage[5.3.0].
    - phpunit/php-code-coverage 5.3.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.
  Problem 3
    - Installation request for phpunit/phpunit 6.5.7 -> satisfiable by phpunit/phpunit[6.5.7].
    - phpunit/phpunit 6.5.7 requires ext-dom * -> the requested PHP extension dom is missing from your system.
  Problem 4
    - Installation request for theseer/tokenizer 1.1.0 -> satisfiable by theseer/tokenizer[1.1.0].
    - theseer/tokenizer 1.1.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.
  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php.ini
    - /etc/php.d/bz2.ini
    - /etc/php.d/calendar.ini
    - /etc/php.d/ctype.ini
    - /etc/php.d/curl.ini
    - /etc/php.d/exif.ini
    - /etc/php.d/fileinfo.ini
    - /etc/php.d/ftp.ini
    - /etc/php.d/gd.ini
    - /etc/php.d/gettext.ini
    - /etc/php.d/gmp.ini
    - /etc/php.d/iconv.ini
    - /etc/php.d/json.ini
    - /etc/php.d/ldap.ini
    - /etc/php.d/mbstring.ini
    - /etc/php.d/pdo.ini
    - /etc/php.d/pdo_sqlite.ini
    - /etc/php.d/phar.ini
    - /etc/php.d/shmop.ini
    - /etc/php.d/simplexml.ini
    - /etc/php.d/sockets.ini
    - /etc/php.d/sqlite3.ini
    - /etc/php.d/tokenizer.ini
    - /etc/php.d/xml.ini
    - /etc/php.d/zip.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Google后发现，php-xml扩展有以上需要的相关软件包

</>复制代码 
yum install php72w-xml.x86_64

重新执行composer install命令，依赖下载成功

我本机homestead中的Nginx是通过 /etc/nginx/sites-available 目录设置对应多域名的nginx配置文件，但是不知道服务器上安装的Nginx，却没有这个目录，所以查看了下Nginx.conf文件，发现http模块中有如下一条配置

</>复制代码 
    本机homestead中Nginx.conf
    ##
    # Virtual Host Configs
    ##
    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
    
    服务器上安装的Nginx.conf
    # 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;

那好吧，我估计sites-available也是软连接的conf.d或者sites-enabled目录吧，所以我就直接将官方手册中Nginx配置复制了一份到/etc/nginx/conf.d/域名.conf，修改了一些配置

</>复制代码 
server {
    listen 80;
    server_name 域名或公网IP;
    root 项目地址指向到public目录;
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";
    index index.html index.htm index.php;
    charset utf-8;
    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }
    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }
    error_page 404 /index.php;
    location ~ .php$ {
        fastcgi_split_path_info ^(.+.php)(/.+)$;
        fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;        **这里有个坑下面讲**
        fastcgi_index index.php;
        include fastcgi_params;
    }
    location ~ /.(?!well-known).* {
        deny all;
    }
}

配置完毕，保存退出，通过域名访问，发现报502错误，查看下Nginx的错误日志，发现报如下错误

</>复制代码 
2018/05/06 20:17:37 [crit] 5898#0: *66 connect() to unix:/var/run/php/php7.2-fpm.sock failed (2: No such file or directory) while connecting to upstream,

简单的讲下，php-fpm.sock文件就是让Nginx和PHP-FPM的进程间进行通信的文件，具体的含义，这边就不做详细介绍了。进这个目录查看下是否存在这个目录或文件，发现两个问题：

目录错误，不是/var/run/php，而是/var/run/php-fpm

php7.2-fpm.sock这个文件未生成

未生成原因：php5.3之后的版本，php-fpm.conf里的listen的默认配置是127.0.0.1:9000，也就是tcp的方式，不会生成php-fpm.sock。

因为这次上线的网站没有什么并发量，unix socket方式要比tcp的方式快而且消耗资源少，所以我还是采用unix socket方式。定位到问题后，修改下 /etc/php-fpm.d/www.conf，也就是php-fpm的配置文件，关闭原来的listen方式，然后重启下php-fpm

</>复制代码 
;listen = 127.0.0.1:9000
listen = /var/run/php-fpm/php7.2-fpm.sock

这个时候，由于职业习惯，想把Nginx也重启下，然后就又碰到了一个问题

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z project_fjylhjjsyxgs]# nginx -s stop
[root@iZbp17dq2xryqoixibq5u1Z project_fjylhjjsyxgs]# nginx -s reload
nginx: [error] open() "/run/nginx.pid" failed (2: No such file or directory)

这应该是因为把Nginx进程杀死后pid丢失了，下一次再开启nginx -s reload时无法启动。再次面向Google编程，发现还有挺多人碰到这个问题，所以解决方法马上就能搜索到了，执行如下命令

</>复制代码 
nginx -c /etc/nginx/nginx.conf
nginx -s reload

ok，接着Navicat远程连接到服务器数据库，source下数据库完毕。现看起来应该是可以跑起网站来了。再次访问域名，发现还是502，再次查看Nginx日志，报如下错误：

</>复制代码 
2018/05/06 20:37:00 [crit] 6078#0: *1 connect() to unix:/var/run/php-fpm/php7.2-fpm.sock failed (13: Permission denied) while connecting to upstream,

和上面报错看起来差不多，但是这次主要问题出在跑Nginx的用户是Nginx，而php-fpm.sock这个文件，监听的Nginx用户没有该权限，导致Nginx无法访问php-fpm.sock这个文件，自然监听就失去了效果，再次修改php-fpm配置文件和重启下php-fpm

</>复制代码 
; Set permissions for unix socket, if one is used. In Linux, read/write
; permissions must be set in order to allow connections from a web server. Many
; BSD-derived systems allow connections regardless of permissions.
; Default Values: user and group are set as the running user
;                 mode is set to 0660
listen.owner = nginx
listen.group = nginx
listen.mode = 0660

重新访问下域名，发现访问任何路由都是白屏，这次状态码都是200了，但是没有任何输出，再次面向Google编程……发现问题：

</>复制代码 
由于nginx与php-fpm之间的一个小bug，会导致这样的现象： 网站中的静态页面 .html 都能正常访问，而 .php 文件虽然会返回200状态码， 但实际输出给浏览器的页面内容却是空白。 简而言之，原因是nginx无法正确的将 *.php 文件的地址传递给php-fpm去解析， 相当于php-fpm接受到了请求，但这请求却指向一个不存在的文件，于是返回空结果。 为了解决这个问题，需要改动nginx默认的fastcgiparams配置文件

在 /etc/nginx/fastcgi_params 文件的最后增加两行：

</>复制代码 
fastcgi_param SCRIPT_FILENAME  $document_root$fastcgi_script_name;  
fastcgi_param PATH_INFO     $fastcgi_script_name;  

再再再次访问域名，终于正常显示了，但是页面上又出现了新的错误：

</>复制代码 
could not find driver（select * from users where deleted = 0）

任何有sql查询的页面都报如上错误，这个错误多半是因为pdo_mysql未打开或者未安装此模块造成，执行 php -m 发现还真没装，安装php72w-mysql又遇到一个坑

</>复制代码 
yum install php72w-mysql

报如下错误，说缺少libmysqlclient.so.18依赖

</>复制代码 
......
error: package: php72w-mysql 
requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
Available: 1:mariadb-libs-5.5.52-1.el7.x86_64 (base)
           libmysqlclient.so.18(libmysqlclient_18)(64bit)
......

这就很奇怪了，查看用户库文件目录内libmysqlclient.so.18已经存在

</>复制代码 
[root@iZbp17dq2xryqoixibq5u1Z ~]# ll /usr/lib64/mysql/libmysqlclient.so.18
libmysqlclient.so.18      libmysqlclient.so.18.1.0

这个坑花了一个小时，Google多次尝试无果后，认真思考下可能的原因，想了想可能是mysql版本的问题，修改下 /etc/yum.repos.d/mysql-community.repo 配置文件，将5.6的enabled设为1，5.5设为0，更新Mysql版本后，再次执行 yum install php72w-mysql 安装pdo_mysql模块成功…...

后续的部署优化，另外开篇记录。

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