Docker socket is not readable by the www-data user. Cannot continue.

[DesertCookie]

I recently restarted my unRAID server, only to find my mastercontainer's UI isn't reachable anymore and while the containers under it get started, they too are never reachable. The main container keeps waiting for the database, despite it saying it is ready to handly connections.

That seems to be a secondary issue, though, looking that the mastercontainer logs which repeatedly print this:

sudo: /etc/sudo.conf is world writable
sudo: /etc/sudo.conf is world writable
sudo: /etc/sudoers is world writable
sudo: error initializing audit plugin sudoers_audit
Trying to fix docker.sock permissions internally...
Adding internal www-data to group docker
sudo: /etc/sudo.conf is world writable
sudo: /etc/sudo.conf is world writable
sudo: /etc/sudoers is world writable
sudo: error initializing audit plugin sudoers_audit
Docker socket is not readable by the www-data user. Cannot continue.

My config (unchanged for the last 12 months, with the exception of --security-opt label=disabled a while back which resolved an issue where the mastercontainer wouldn't start at all anymore but would still start its subcontainers):

...which results in this run command:

docker run
  -d
  --name='nextcloud-aio-mastercontainer'
  --net='bridge'
  --pids-limit 2048
  -e TZ="Europe/Berlin"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="STower24"
  -e HOST_CONTAINERNAME="nextcloud-aio-mastercontainer"
  -e 'APACHE_PORT'='11000'
  -e 'NEXTCLOUD_ENABLE_DRI_DEVICE'='true'
  -e 'NEXTCLOUD_ADDITIONAL_APKS'='imagemagick'
  -e 'NEXTCLOUD_ADDITIONAL_PHP_EXTENSIONS'='imagick'
  -e 'NEXTCLOUD_ENABLE_DRI_DEVICE'='true'
  -e 'NEXTCLOUD_KEEP_DISABLED_APPS'='true'
  -e 'NEXTCLOUD_MEMORY_LIMIT'='8192M'
  -e 'NEXTCLOUD_DATADIR'='/mnt/user/NextcloudData'
  -e 'AIO_COMMUNITY_CONTAINERS'='memories'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.webui='https://[IP]:[PORT:8095]'
  -l net.unraid.docker.icon='https://github.com/Muwahhidun/logo/raw/main/nextcloud-aio-logo.png'
  -p '8095:8080/tcp'
  -v 'nextcloud_aio_mastercontainer':'/mnt/docker-aio-config':'rw'
  -v '/var/run/docker.sock':'/var/run/docker.sock':'ro'
  --security-opt label=disabled
  --restart=unless-stopped 'nextcloud/all-in-one:beta' 

[DesertCookie]

It seems, reinstalling the app from the unRAID appstore while keeping all configs did the trick. Curious.