[SOLVED] Nginx log deleted automatically

Troubleshooting
1

Required Information

  • DietPi version | cat /boot/dietpi/.version
    G_DIETPI_VERSION_CORE=8
    G_DIETPI_VERSION_SUB=16
    G_DIETPI_VERSION_RC=2
    G_GITBRANCH=‘master’
    G_GITOWNER=‘MichaIng’
  • Distro version | echo $G_DISTRO_NAME $G_RASPBIAN
    bullseye 0
  • Kernel version | uname -a
    Linux DietPi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux
  • SBC model | echo $G_HW_MODEL_NAME or (EG: RPi3)
    RPi 3 Model B+ (aarch64)
  • Power supply used | (EG: 5V 1A RAVpower)
    5V 3A
  • SD card used | (EG: SanDisk ultra)
    SanDisk 32GB

DietPi v8.16.2 : 15:46 - Thu 04/13/23
Device model : RPi 3 Model B+ (aarch64)

I have brand new DietPi install. I have installed nginx via dietpi-software > search > nginx [85] and let’s encrypt certificates as well via dietpi-launcher
Secure default server works as expected. Can be access from the Internet and locally. Good.
However, I notice nginx logs are automatically deleted every few hours when there is no default setting that should force nginx to act that way.

/etc/nginx/nginx.conf
# /etc/nginx/nginx.conf

user www-data;
# As a thumb rule: One per CPU.
worker_processes 4;

pid /run/nginx.pid;

# Load dynamic modules
include /etc/nginx/modules-enabled/*.conf;

# Maximum file descriptors that can be opened per process
# This should be > worker_connections
worker_rlimit_nofile 100;

events {
        worker_connections 50;
}

error_log /var/log/nginx/error.log;

http {
        charset utf-8;

        # Avoid > 2 MiB upload error: https://github.com/MichaIng/DietPi/issues/546
        client_max_body_size 512M;

        # Upstream to abstract back-end connection(s) for PHP
        upstream php {
                server unix:/run/php/php7.4-fpm.sock;
        }

        # Set the mime-types via the mime.types external file
        include mime.types;

        # And the fallback mime-type
        default_type application/octet-stream;

        # Click tracking!
        access_log off;

        # Hide Nginx version
        server_tokens off;

        # ~2 seconds is often enough for HTML/CSS, but connections in
        # Nginx are cheap, so generally it's safe to increase it
        keepalive_timeout 2;

        # You usually want to serve static files with Nginx
        sendfile on;

        tcp_nopush on; # off may be better for Comet/long-poll stuff
        tcp_nodelay off; # on may be better for Comet/long-poll stuff

        server_name_in_redirect off;
        types_hash_max_size 2048;

        gzip off;
        gzip_http_version 1.0;
        gzip_comp_level 1;
        gzip_min_length 512;
        gzip_buffers 4 8k;
        gzip_proxied any;
        gzip_types
        # text/html is always compressed by HttpGzipModule
        text/css
        text/plain
        text/x-component
        application/javascript
        application/json
        application/xml
        application/xhtml+xml
        application/x-font-ttf
        application/x-font-opentype
        application/vnd.ms-fontobject
        image/svg+xml
        image/x-icon;

        # This should be turned on if you are going to have pre-compressed copies (.gz) of
        # static files available. If not it should be left off as it will cause extra I/O
        # for the check. It would be better to enable this in a location {} block for
        # a specific directory:
        #gzip_static on;

        gzip_disable "msie6";
        gzip_vary on;

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}

/etc/nginx/sites-available/default

/etc/nginx/sites-available/default

server {

    access_log /var/log/nginx/access.server.log;
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www;
    index index.php index.html index.htm index.nginx-debian.html;

    server_name myserver.com;

    include /etc/nginx/sites-dietpi/*.conf;

    location / {
            try_files $uri $uri/ =404;
    }

    location ~ \.php(?:$|/) {
            include snippets/fastcgi-php.conf;
            fastcgi_pass php;
    }

listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/myserver.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/myserver.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}



/etc/logrotate.d/nginx unedited
/var/log/nginx/*.log {
        daily
        missingok
        rotate 14
        compress
        delaycompress
        notifempty
        create 0640 www-data adm
        sharedscripts
        prerotate
                if [ -d /etc/logrotate.d/httpd-prerotate ]; then \
                        run-parts /etc/logrotate.d/httpd-prerotate; \
                fi \
        endscript
        postrotate
                invoke-rc.d nginx rotate >/dev/null 2>&1
        endscript
}

The expected behaviour would be the logs not to be deleted. Even logrotate is not installed, so I can only think maybe there is a dietpi setting causing this issue?

Thank you very much for your feedback in advance.

Regards,

2

By default DietPi uses RAMlog, to reduce too much writes to a SD card. So /var/log is cleared every hour.
If you want persistent logs you can change the logging behaviour with dietpi-software
https://dietpi.com/docs/software/log_system/#dietpi-ramlog
Or you change the location of your nginx logs to another then /var/log.

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