At first attempt to open my nextcloud after booting client machine it gives out HTTP 502 error, then, after first refresh, I can see a login screen, but page needs to be refreshed once more to be able to login. Same behavior observed while attempting to connect to webDAV via file explorer, few connection errors, one or two login errors and then it connects
docker-compose.yaml
version: '2'
volumes:
nextcloud:
db:
services:
db:
image: mariadb:10.6
restart: always
command: --transaction-isolation=READ-COMMITTED --log-bin=binlog --binlog-format=ROW
volumes:
- db:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=PASSWORD
- MYSQL_PASSWORD=PASSWORD
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
app:
image: nextcloud
restart: always
ports:
- 8080:80
links:
- db
volumes:
- nextcloud:/var/www/html
- type: bind
source: /mnt/data/nextcloud/data
target: /var/www/html/data
- type: bind
source: /mnt/data/nextcloud/data_nextcloud
target: '/var/www/html/data_nextcloud'
- type: bind
source: /home/user/stable-diffusion-webui/models
target: /mnt/stable-diffusion-models
environment:
- MYSQL_PASSWORD=PASSWORD
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
- MYSQL_HOST=db
nginx config for nextcloud subdomain
server {
server_name nextcloud.exampledomain.org;
access_log /var/log/nginx/nextcloud.access.log;
error_log /var/log/nginx/nextcloud.error.log;
client_max_body_size 0;
underscores_in_headers on;
add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
location / {
proxy_pass "http://localhost:8080/";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Host $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_headers_hash_max_size 512;
proxy_headers_hash_bucket_size 64;
proxy_buffers 16 4k;
proxy_buffer_size 2k;
proxy_connect_timeout 3600;
proxy_send_timeout 3600;
proxy_read_timeout 3600;
send_timeout 3600;
}
location /.well-known/carddav {
return 301 $scheme://$host/remote.php/dav;
}
location /.well-known/caldav {
return 301 $scheme://$host/remote.php/dav;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/exampledomain.org/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/exampledomain.org/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
ssl_stapling on;
ssl_stapling_verify on;
}
conifg.php inside docker
<?php
$CONFIG = array (
'htaccess.RewriteBase' => '/',
'memcache.local' => '\\OC\\Memcache\\APCu',
'apps_paths' =>
array (
0 =>
array (
'path' => '/var/www/html/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/www/html/custom_apps',
'url' => '/custom_apps',
'writable' => true,
),
),
'instanceid' => 'oc6l5gma90hk',
'passwordsalt' => 'SALT',
'secret' => 'SECRET',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'nextcloud.example.com',
),
'trusted_proxies' =>
array (
0 => 'localhost',
),
'overwritehost' => 'nextcloud.example.com',
'overwriteprotocol' => 'https',
'overwritewebroot' => '',
'overwritecondaddr' => '',
'overwrite.cli.url' => 'https://nextcloud.example.com',
'datadirectory' => '/var/www/html/data',
'dbtype' => 'mysql',
'version' => '26.0.0.11',
'dbname' => 'nextcloud',
'dbhost' => 'db',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => 'PASSWORD',
'installed' => true,
'maintenance' => false,
);
nextcloud logs are clear about this problem, nginx logs: nextcloud.access.log; and nextcloud.error.log does not contain anything suspicious too, it feels like a problem tied to nginx and docker interaction. (I have few more web applications on this host and they do not show such behavior)
