宝塔面板部署NextCloud（14.0.3）逐一解决后台安全及设置警告

刚刚把NextCloud更新到14.0.3，后台又出现了一堆警告，也是够烦的。

之前写过 宝塔面板部署NextCloud逐一解决后台安全及设置警告，那个是基于Nextcloud 13.x的，所以就再补充记录一下解决如下的警告。

Use of the the built in php mailer is no longer supported. Please update your email server settings
您的网页服务器未正确设置以解析“/.well-known/caldav”
您的网页服务器未正确设置以解析“/.well-known/carddav”
The database is missing some indexes. Due to the fact that adding indexes on big tables could take some time they were not added automatically. By running “occ db:add-missing-indices” those missing indexes could be added manually while the instance keeps running. Once the indexes are added queries to those tables are usually much faster.
在数据表 “oc_share” 中无法找到索引 “parent_index” .
在数据表 “oc_filecache” 中无法找到索引 “fs_mtime” .
HTTP的请求头 “Referrer-Policy” 未设置为 “no-referrer”, “no-referrer-when-downgrade”, “strict-origin” or “strict-origin-when-cross-origin”. 这会导致信息泄露. 请查阅 W3C 建议

1.Use of the the built in php mailer is no longer supported. Please update your email server settings

大意就是php自带的mail组件不再被nextcloud支持，需要使用smtp方式发送邮件。

其实就是让你设置一个smtp服务器信息，便于发送邮件，关于SMTP这里不再详述。

2.您的网页服务器未正确设置以解析“/.well-known/caldav”及您的网页服务器未正确设置以解析“/.well-known/carddav”

这两个警告可以一起解决，出现该提示一般是因为这两个路径的伪静态设置有问题，导致无法正常访问。

解决方法就是添加两行重定向配置

rewrite /.well-known/carddav /remote.php/dav permanent;
rewrite /.well-known/caldav /remote.php/dav permanent;

3.The database is missing some indexes. Due to the fact that adding indexes on big tables could take some time they were not added automatically. By running “occ db:add-missing-indices” those missing indexes could be added manually while the instance keeps running. Once the indexes are added queries to those tables are usually much faster.

在数据表”oc_share” 中无法找到索引”parent_index”
在数据表”oc_filecache” 中无法找到索引”fs_mtime”

大意是说，数据库的一些索引丢失了，需要使用OCC修复一下。OCC是owncloud的命令行，而nextcloud又是基于owncloud开发的，所以需要用到OCC来修复丢失的数据库索引。

修复命令为：

php occ db:add-missing-indices

SSH进入服务器nextcloud的根目录，并执行修复命令

出现如下错误

Console has to be executed with the user that owns the file config/config.php
Current user: root
Owner of config.php: www
Try adding ‘sudo -u www ‘ to the beginning of the command (without the single quotes)

好吧，需要使用www用户权限来修改，再次执行

sudo -u www php occ db:add-missing-indices

修复成功！

4.HTTP的请求头 “Referrer-Policy” 未设置为 “no-referrer”, “no-referrer-when-downgrade”, “strict-origin” or “strict-origin-when-cross-origin”. 这会导致信息泄露

大意是，需要设置一个Referrer-Policy请求头来提高安全性。Nginx配置文件里添加：

add_header Referrer-Policy "no-referrer";

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至此，Nextcloud升级到14.0.3后出现的一些新的警告提示已全部消灭干净