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Nextcloud storage


I have a Virtual Private Server with Ubuntu and Docker installed. I have a Nextcloud App running inside Docker and I have a problem with the Nextcloud storage.

OS: Ubuntu 20.04.2 LTS
Docker: Docker version 20.10.5, build 55c4c88
VPS size: 10 GB

The Nextcloud gives me the following error message:

It says: Your storage is full, thus no data can be updated or synchronized.

When I try to access the Nextcloud over the browser, the log in screen is available, but when I try to log in, it’s not possible to do so.

$ sudo docker system df

Images          6         5         1.309GB   47.73MB (3%)
Containers      5         4         717.2MB   0B (0%)
Local Volumes   6         6         4.854GB   0B (0%)
Build Cache     0         0         0B        0B

$ sudo docker system df -v

Images space usage:

REPOSITORY                               TAG       IMAGE ID       CREATED       SIZE      SHARED SIZE   UNIQUE SIZE   CONTAINERS
ubuntu_proxy                             latest    aa2db9524419   3 weeks ago   47.73MB   47.73MB       55B           1
jwilder/nginx-proxy                      alpine    c27b943be747   3 weeks ago   47.73MB   47.73MB       0B            0
jrcs/letsencrypt-nginx-proxy-companion   latest    5bd467f6a856   3 weeks ago   25.66MB   0B            25.66MB       1
nextcloud                                apache    61345d6582f9   4 weeks ago   834.8MB   0B            834.8MB       1
mariadb                                  latest    1138596852f3   5 weeks ago   401MB     0B            401MB         1
hello-world                              latest    d1165f221234   7 weeks ago   13.34kB   0B            13.34kB       1

Containers space usage:

CONTAINER ID   IMAGE                                    COMMAND                  LOCAL VOLUMES   SIZE      CREATED       STATUS                   NAMES
e2f0e2128017   jrcs/letsencrypt-nginx-proxy-companion   "/bin/bash /app/entr…"   3               16.6kB    3 weeks ago   Up 3 weeks               ubuntu_letsencrypt-companion_1
2faf44c8887b   nextcloud:apache                         "/ apac…"   1               717MB     3 weeks ago   Up 3 weeks               ubuntu_app_1
9db394739db3   mariadb                                  "docker-entrypoint.s…"   1               20.6kB    3 weeks ago   Up 3 weeks               ubuntu_db_1
3960054c80ab   ubuntu_proxy                             "/app/docker-entrypo…"   4               3.91kB    3 weeks ago   Up 3 weeks               ubuntu_proxy_1
4681531c9a9d   hello-world                              "/hello"                 0               0B        4 weeks ago   Exited (0) 4 weeks ago   zen_boyd

Local Volumes space usage:

VOLUME NAME                                                        LINKS     SIZE
ubuntu_nextcloud                                                   1         4.624GB
ubuntu_certs                                                       2         16.49kB
ubuntu_vhost.d                                                     2         278B
ubuntu_html                                                        2         1.106kB
5995bf51a230e50cafed67a9c1ea92de2fc7b6ed1cc2739e31fbeb5fc8acd977   1         1.525kB
ubuntu_db                                                          1         230.3MB

Build cache usage: 0B


My VPS has 10 GB. For me it seems that only around half of the storage inside my docker is used, but the Nextcloud volume is full. Right?

So, how can I solve my storage problem properly?
My Idea is to extend the Nextcloud volume, but I could not find how to do so. Is that possible and how can I do that?

Thank you for your help.


Edit: unfortunately I was not able to post the $ sudo docker system df -v in a way that it is displayed correctly. Maybe you can tell me how to do so?