2021/12/17現在、 centos stream 9は snapd をインストールできないみたい。
もう少し待ってから使ったほうが良い。

まずは鍵認証までOKという前提


yum update
sudo timedatectl set-timezone Asia/Tokyo

#selinux をオフ


grubby --update-kernel ALL --args selinux=0
shutdown -r now

epel , remi をそれぞれ追加


dnf config-manager --set-enabled crb
dnf install https://dl.fedoraproject.org/pub/epel/9/Everything/x86_64/Packages/e/epel-release-9-2.el9.noarch.rpm
dnf install https://dl.fedoraproject.org/pub/epel/9/Everything/x86_64/Packages/e/epel-next-release-9-2.el9.noarch.rpm

dnf install https://rpms.remirepo.net/enterprise/remi-release-9.rpm
dnf config-manager --set-enabled remi

#nginx のリポジトリを追加

vi /etc/yum.repos.d/nginx.repo


[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
enabled=0
gpgcheck=0

#nginx インストール


yum install nginx
nginx -v
//nginx version: nginx/1.20.1 ok

#nginx の設定ファイル

vim /etc/nginx/nginx.conf


user  nginx;
worker_processes  auto;
worker_rlimit_nofile 100000;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  2048;
    multi_accept on;
    use epoll;
}


http {

    server_tokens off;
    include       /etc/nginx/mime.types;
    default_type  text/html;
    charset UTF-8;

    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       off;
    tcp_nopush     on;
    tcp_nodelay    on;


    keepalive_timeout 10;
    client_header_timeout 10;
    client_body_timeout 10;
    reset_timedout_connection on;
    send_timeout 10;

    limit_conn_zone $binary_remote_addr zone=addr:5m;
    limit_conn addr 100;

    gzip on;
    gzip_http_version 1.0;
    gzip_disable "msie6";
    gzip_proxied any;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_types text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript application/json;
    open_file_cache off;

    client_max_body_size 20m;
    server_names_hash_bucket_size 64;
    include /etc/nginx/conf.d/*.conf;
}

#php8 インストール


//まずはリスト表示
sudo dnf module list reset php -y

//8.1 を有効に
sudo dnf module enable php:remi-8.1

//php と、その他必要そうなファイルを一気にインスコ

sudo dnf install php php-cli php-fpm php-curl php-mysqlnd php-gd php-opcache php-zip php-intl php-common php-bcmath php-imap php-imagick php-xmlrpc php-json php-readline php-memcached php-redis php-mbstring php-apcu php-xml

//確認

php -v

www.conf を書き換え

vim /etc/php-fpm.d/www.conf


#user = apache 
user = nginx

#group = apache
group = nginx

php-fpm再起動


sudo systemctl restart php-fpm

vim /var/www/html/yamada/index.php


<?php

    phpinfo();

?>

vim /etc/nginx/conf.d/default.conf


server {
    listen 80;
    server_name yourdomain.net;
    root   /var/www/html/yamada/;
    index index.php index.html index.htm;



         location ~ \.php$ {

       fastcgi_pass   unix:/var/run/php-fpm/www.sock;

       fastcgi_index  index.php;

       fastcgi_param  SCRIPT_FILENAME /var/www/html/yamada$fastcgi_script_name;
        include        fastcgi_params;

 }



}


sudo nginx -t
sudo systemctl restart nginx

//ついでに自動起動設定も
sudo systemctl enable nginx
sudo systemctl enable php-fpm

#firewall も開けよう


firewall-cmd --add-service=https --zone=public --permanent
firewall-cmd --add-service=http --zone=public --permanent
firewall-cmd --reload

これでサーバーのIPアドレスにアクセスして、phpinfoが表示されればOK!