前序文章：
这是折腾树莓派的最后一篇文章，也是买树莓派的最大目的：搭建自己的私有云，随时同步和访问各种设备上的数据。
nextcloud简介
nextcloud前身是大名鼎鼎的owncloud，两者均是开源的网络硬盘系统。nextcloud不仅可以搭建私有云存储和同步数据，也提供联系人、日程管理功能，web端还提供私密的语音视频通话功能。nextcloud致力于数据安全，云端的数据均可选择加密，并遵循安全行业最佳实践。客户端支持windows、macos、linux三大pc平台，以及安卓ios两大移动平台，完全足够家庭或中小型团队协作使用。
部署和设置nextcloud
nextcloud程序由php语言编写，因此部署需要具备php运行环境以及web中间件。因其支持平台众多，官方文档略显繁琐，故本文给出树莓派上用nginx、mariadb、redis搭建nextcloud的详细步骤。
- 从官网下载部署程序；
- 更新系统和必备软件：
sudo apt update && sudo apt upgrade && sudo apt install -y libreoffice ffmpeg； - 安装nginx：
sudo apt install -y nginx； - 安装redis：
sudo apt install -y redis; - 安装mariadb：
sudo apt install mariadb-server； - 安装php及推荐模块：
sudo apt install -y php7.3 php7.3-fpm php7.3-curl php7.3-gd php7.3-dom php7.3-iconv php7.3-openssl php-redis php-mysql php7.3-zip php7.3-bz2 php7.3-intl php7.3-imagick； - 解压部署程序：
unzip nextcloud-xxxx.zip； - 将nextcloud文件移动到网站根目录：
sudo mv nextcloud-xxx /var/www/html/nextcloud； - 创建数据目录，更改目录权限：
mkdir /var/www/html/nextcloud/data && sudo chown -R www-data:www-data /var/www/html/nextcloud； - 配置php：打开/etc/php/7.3/fpm/php.ini文件，做如下更改：
- expose_php改成off
- date.timezone 一行删掉前面的;号，值改成Asia/Shanghai
- 删掉opcache.enable=1，opcache.validate_timestamps=1，opcache.revalidate_freq=2这三行前面的;号，将opcache.revalidate_freq的值改成30;
- 配置fpm：打开/etc/php/7.3/fpm/pool.d/www.conf文件，移除clear_env=no，env[开头那几行前面的;号（即388，401-405这几行前面的分号）；
- 设置mariadb管理员密码：
mysqladmin -uroot password '你的密码'; - 创建nextcloud数据库：
mysql -uroot -p'你的密码' -e 'create user nextcloud@"%" identified by "nextcloud数据库密码"; create database nextcloud default charset=utf8mb4; grant all privileges on nextcloud.* to nextcloud@"%"; flush privileges;'； 配置nginx：在/etc/nginx/sites-enabled目录下，创建一个nextcloud文件，其内容如下（注意，本配置中禁用了https）：
upstream php-handler { server unix:/run/php/php7.3-fpm.sock; } server { listen 80; listen [::]:80; server_name cloud.example.com; # enforce https #return 301 https://$server_name:443$request_uri; #} #server { # listen 443 ssl http2; # listen [::]:443 ssl http2; # server_name cloud.example.com; # Use Mozilla's guidelines for SSL/TLS settings # https://mozilla.github.io/server-side-tls/ssl-config-generator/ # NOTE: some settings below might be redundant # ssl_certificate /etc/ssl/nginx/cloud.example.com.crt; # ssl_certificate_key /etc/ssl/nginx/cloud.example.com.key; # Path to the root of your installation root /var/www/html/nextcloud; location = /robots.txt { allow all; log_not_found off; access_log off; } # The following 2 rules are only needed for the user_webfinger app. # Uncomment it if you're planning to use this app. #rewrite ^/.well-known/host-meta /public.php?service=host-meta last; #rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last; # The following rule is only needed for the Social app. # Uncomment it if you're planning to use this app. #rewrite ^/.well-known/webfinger /public.php?service=webfinger last; location = /.well-known/carddav { return 301 $scheme://$host:$server_port/remote.php/dav; } location = /.well-known/caldav { return 301 $scheme://$host:$server_port/remote.php/dav; } # set max upload size client_max_body_size 512M; fastcgi_buffers 64 4K; # Enable gzip but do not remove ETag headers gzip on; gzip_vary on; gzip_comp_level 4; gzip_min_length 256; gzip_proxied expired no-cache no-store private no_last_modified no_etag auth; gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy; # Uncomment if your server is build with the ngx_pagespeed module # This module is currently not supported. #pagespeed off; location / { rewrite ^ /index.php; } location ~ ^//(?:build|tests|config|lib|3rdparty|templates|data)// { deny all; } location ~ ^//(?:/.|autotest|occ|issue|indie|db_|console) { deny all; } location ~ ^//(?:index|remote|public|cron|core//ajax//update|status|ocs//v[12]|updater//.+|oc[ms]-provider//.+)/.php(?:$|//) { fastcgi_split_path_info ^(.+?/.php)(//.*|)$; set $path_info $fastcgi_path_info; try_files $fastcgi_script_name =404; include fastcgi_params; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param PATH_INFO $path_info; #fastcgi_param HTTPS on; # Avoid sending the security headers twice fastcgi_param modHeadersAvailable true; # Enable pretty urls fastcgi_param front_controller_active true; fastcgi_pass php-handler; fastcgi_intercept_errors on; fastcgi_request_buffering off; } location ~ ^//(?:updater|oc[ms]-provider)(?:$|//) { try_files $uri/ =404; index index.php; } # Adding the cache control header for js, css and map files # Make sure it is BELOW the PHP block location ~ /.(?:css|js|woff2?|svg|gif|map)$ { try_files $uri /index.php$request_uri; add_header Cache-Control "public, max-age=15778463"; # Add headers to serve security related headers (It is intended to # have those duplicated to the ones above) # Before enabling Strict-Transport-Security headers please read into # this topic first. #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always; # # WARNING: Only add the preload option once you read about # the consequences in https://hstspreload.org/. This option # will add the domain to a hardcoded list that is shipped # in all major browsers and getting removed from this list # could take several months. add_header Referrer-Policy "no-referrer" always; add_header X-Content-Type-Options "nosniff" always; add_header X-Download-Options "noopen" always; add_header X-Frame-Options "SAMEORIGIN" always; add_header X-Permitted-Cross-Domain-Policies "none" always; add_header X-Robots-Tag "none" always; add_header X-XSS-Protection "1; mode=block" always; # Optional: Don't log access to assets access_log off; } location ~ /.(?:png|html|ttf|ico|jpg|jpeg|bcmap)$ { try_files $uri /index.php$request_uri; # Optional: Don't log access to other assets access_log off; } }启动各项服务：
sudo systemctl restart nginx php7.3-fpm redis-server mariadb。如果系统安装了防火墙，记得放行80端口；打开浏览器，在地址栏输入树莓派的ip，例如：http://192.168.1.2，将出现nextcloud的设置页面，选择用户名和密码，以及输入数据库用户名和密码，完成设置。
- 设置完成后，进入了类似百度云盘的操作界面，说明云盘已经初步搭建好了。
- 配置nextcloud，使其性能更好：打开/var/www/html/nextcloud/config/config.php文件，在最后的);前添加缓存配置：
'memcache.local' => '/OC/Memcache/Redis',
'memcache.distributed' => '/OC/Memcache/Redis',
'redis' => [
'host' => 'localhost',
'port' => 6379,
'dbindex' => 0,
'password' => '',
'timeout' => 1.5,
],
至此，nextcloud的部署和设置全部完毕，在浏览器界面已经能够查看和管理各种数据和功能了。
其它
- 树莓派默认的sd卡存储空间很小，实践应该将nextcloud的程序文件托管在外置硬盘上；
- 设置外网访问需要用到域名、dns、https配置以及内网穿透，本文不再给出；
- 各平台客户端的设置和使用请参考官方教程，本文不再给出