Solr Image does not start without a docker volume

[skremdwd]

I am currently trying to start the official Solr container with a mounted path instead of a docker volume.

I am getting an error on startup that solr.xml and zoo.cfg are not writeable.
It seems that the issue is that those files are created with root:root and the owner is not changed correctly.

If I change the owner/mod o+rwx of both files, the container starts without an issue and more directories are created along them with the correct 1000:1000 UID/GID.

I am not sure what the issue is, it seems to me that this is done inside the Solr Dockerfile

But maybe it is not possible to use a mounted path with the current Dockerfile setup?
I would prefer a file over volume because it is not possible to move normal docker volumes outside of the root file system, e.g. to a network storage.

Issue Reproduction

Modified ansible part (master and slave are identical):

- name: Start Solr child container
  docker_container:
    name: solr-slave
    image: "{{ solr_image_prefix }}/{{ solr_image_repository }}:{{ solr_image_tag }}"
    pull: "{{ solr_image_pull }}"
    command:
      - solr
      - -f
      - "-Dmaster.enable=true"
      - "-Dslave.enable=true"
      - "-Dslave.masterUrl=http://solr-master:8983/solr"
      - "-Dslave.pollInterval={{ solr_slave_poll_interval }}"
      # This is the Solr instance used for queries, so we need to enable shards
      # However we want to use a whitelist so that only queries for configured shards are allowed
      - "-Dsolr.shardsWhitelist={{ solr_shards_whitelist | join(',') }}"
    detach: yes
    restart_policy: unless-stopped
    exposed_ports:
      - "8983"
    networks:
      - name: esgf
    networks_cli_compatible: yes
    volumes: ["/some-mount/solr-slave/data:/var/solr/data:rw"]
    state: started
    recreate: yes

First container start:

-rw-------. 1 root root 2180 Mar 24  2019 solr.xml

Changing permission:

sudo chown 1000:1000 solr.xml

Second container start:

-rw-------. 1 esgf esgf  2180 Mar 24  2019 solr.xml
-rw-------. 1 root     root      975 Feb 21  2019 zoo.cfg

Changing permission again:

sudo chown 1000:1000 zoo.cfg

Third and final container start:

drwxr-xr-x. 2 esgf esgf 4096 Jul 19 09:54 aggregations
drwxr-xr-x. 3 esgf esgf 4096 Jul 19 09:54 datasets
drwxr-xr-x. 3 esgf esgf 4096 Jul 19 09:54 files
-rw-------. 1 esgf esgf 2180 Mar 24  2019 solr.xml
-rw-------. 1 esgf esgf 975 Feb 21  2019 zoo.cfg