centos8 安装LNMP，逐步安装，基于docker安装centos8镜像，在安装lnmp环境！！！

1.安装nginx:

sudo yum install nginx

默认安装的是1.14版本；
升级到最新版，操作如下
1).添加中科大的镜像

sudo vim /etc/yum.repos.d/nginx.repo

2）写入以下指令并保存：

[nginx-mainline]name=nginx mainline repobaseurl=http://mirrors.ustc.edu.cn/nginx/mainline/centos/$releasever/$basearch/gpgcheck=0enabled=1module_hotfixes=true

3).执行更新yum

sudo yum update

4)更新完毕后查看nginx版本：

nginx -v #1.21

2.安装PHP8（仅安装8.0版本）,使用remi安装，依次执行：

sudo dnf -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpmsudo dnf -y install https://rpms.remirepo.net/enterprise/remi-release-8.rpmsudo dnf -y install yum-utilssudo dnf module reset phpsudo dnf module install php:remi-8.0 -ysudo dnf install php -y

安装完成后查看php版本：

 php --version#php8

执行systemctl start php-fpm启动php8报错：

Job for php-fpm.service failed because the control process exited with error code.See "systemctl status php-fpm.service" and "journalctl -xe" for details.

执行journalctl -xe 发现详细错误中有：

ERROR: [pool www] failed to read the ACL of the socket '/run/php-fpm/www.sock': Operation ERROR: FPM initialization failed

执行以下替换命令后成功启动php-fpm：

sed -i 's/listen.acl_users/;listen.acl_users/g' /etc/php-fpm.d/www.confsed -i 's/listen.acl_groups/;listen.acl_groups/g' /etc/php-fpm.d/www.conf

启动php-fpm后，配置nginx,发现无法访问，可能报错：404，500， 502，file not find等错误；
通过监听nginx错误日志查看原因：

tail -f /var/log/nginx/error.log

报错：*1342 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 127.0.0.1, server: localhost, request: "GET /index.php HTTP/1.0", upstream: "http://127.0.0.1:80/index.php", host: "127.0.0.1",；排查后。php-fpm虽然已启动，但非9000端口。将php-fpm 改为socket配置
报错： *3574 socket() failed (24: Too many open files) while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET /index.php HTTP/1.0", upstream: "http://127.0.0.1:80/index.php", host: "127.0.0.1"，删除 /etc/nginx/conf.d/ 其中一个配置文件，保留一个即可，原因9000和socket冲突,并且更改目标目录；
报错： connect() to unix:/run/php-fpm/www.sock failed (13: Permission denied) while connecting to upstream, client: 172.17.0.1, server: localhost, request: "GET /index.php HTTP/1.1", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "localhost:8082"；通过更改用户分组，分别保证： /etc/nginx/nginx.conf， /etc/php-fpm.d/www.conf 文件中用户分组一致;

并且给对应的网站目录文件/var/www/html/和sock启动项目录/run/php-fpm/www.sock给到nginx和php-fpm的用户的读写权限：chown -R www:www 对应目录

附/etc/nginx/conf.d/default.conf 配置：

server {listen 80;server_namelocalhost 127.0.0.1;#access_log/var/log/nginx/host.access.logmain;root /var/www/html;location / {indexindex.html index.php;}#error_page404/404.html;# redirect server error pages to the static page /50x.html#error_page 500 502 503 504/50x.html;location = /50x.html {root /usr/share/nginx/html;}# proxy the PHP scripts to Apache listening on 127.0.0.1:80##location ~ \.php$ {#proxy_pass http://127.0.0.1;#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000#location ~* \.php$ {#fastcgi_pass 127.0.0.1:9000;fastcgi_pass unix:/run/php-fpm/www.sock;fastcgi_indexindex.php;fastcgi_split_path_info^((?U).+\.php)(/?.+)$;#fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;fastcgi_paramSCRIPT_FILENAME $document_root$fastcgi_script_name;includefastcgi_params;}# deny access to .htaccess files, if Apache's document root# concurs with nginx's one##location ~ /\.ht {#denyall;#}}

3.安装mysql8.0
1）.安装Yum Repository

wget https://repo.mysql.com//mysql80-community-release-el8-1.noarch.rpm

2）.yum安装mysql服务

yum install mysql-server

3）.设置开机自启动mysql:

systemctl enable mysqld.service

4）.检查mysql是否为开机自启动：

systemctl list-unit-files|grep mysqld

5）.启动MySQL

systemctl start mysqld.service #8.0.21

修改mysql中root 账户的密码：
在MySQL 8.04前，执行：SET PASSWORD=PASSWORD(‘[新密码]’);但是MySQL8.0.4开始，这样默认是不行的。因为之前，MySQL的密码认证插件是“mysql_native_password”，而现在使用的是“caching_sha2_password”。
登入mysql:

mysql -uroot

选择database

use mysql;

修改root账户密码为123456：

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';

刷新缓存：

FLUSH PRIVILEGES;

退出数据库：

quit

使用密码登录数据库

mysql -uroot -p123456

设置 MySQL 8 允许远程访问

配置 /etc/my.cnf

vim /etc/my.cnf

添加如下内容：

bind-address=0.0.0.0

连接到MySQL，创建用户server密码123456的用户

CREATE USER 'server'@'%' IDENTIFIED BY '123456';

设置server用户任何主机都可以连接本主机mysql服务

GRANT ALL PRIVILEGES ON *.* TO 'server'@'%'WITH GRANT OPTION;

清除缓存退出并且重启MySQL服务，完成！

4.其他，可能用到的命令
需要安装的扩展包:

yum -y install sudo #安装sudoyum -y install vim* #安装vimyum -y install net-tools #安装ifconfig pingyum install initscripts -y #安装serviceyum -y install wget #安装wgetyum -y install lsof #查端口

添加用户分组：

groupadd wwwuseradd -g www www

5.安装最新版的swoole

yum install php-devel php-pear httpd-devel #安装pecl扩展systemctl restart php-fpm #重启php-fpmchown -R www:www /run/php-fpm #设置php-fpm权限echo "extension=swoole.so" >> /etc/php.ini #配置php.iniphp -m #查看是否成功，并且重启php-fpm