Ddev yaml file for using solr in TYPO3

docker-compose.solr.yaml

# To access Solr after it is installed:
# - The Solr admin interface will be accessible at:
#   http://<projectname>.ddev.site:8983/solr/
#   For example, if the project is named "myproject" the hostname will be:
#   http://myproject.ddev.site:8983/solr/
# - To access the Solr container from the web container use:
#   http://solr:8983/solr/

version: '3.6'

services:
  solr:
    # Name of container using standard ddev convention
    container_name: ddev-${DDEV_SITENAME}-solr
    # The solr docker image is at https://hub.docker.com/r/typo3solr/ext-solr
    image: typo3solr/ext-solr:11.0.3
    restart: "no"
    # Solr is served from this port inside the container.
    ports:
      - 8983
    # These labels ensure this service is discoverable by ddev.
    labels:
      com.ddev.site-name: ${DDEV_SITENAME}
      com.ddev.approot: $DDEV_APPROOT
    environment:
      # This defines the host name the service should be accessible from. This
      # will be sitename.ddev.site.
      - VIRTUAL_HOST=$DDEV_HOSTNAME
      # HTTP_EXPOSE exposes http traffic from the container port 8983
      # to the host port 8983 vid ddev-router reverse proxy.
      - HTTP_EXPOSE=8983:8983
      # HTTPS_EXPOSE exposes https traffic from the container port 8983
      # to the host port 8984 vid ddev-router reverse proxy.
      - HTTPS_EXPOSE=8984:8983
    volumes:
      # solr core *data* is stored on the 'solr' docker volume
      # This mount is optional; without it your search index disappears
      # each time the ddev project is stopped and started.
      - solr:/var/solr

      - ".:/mnt/ddev_config"

    external_links:
      - "ddev-router:${DDEV_SITENAME}.${DDEV_TLD}"

  # This links the Solr service to the web service defined in the main
  # docker-compose.yml, allowing applications running inside the web container to
  # access the Solr service at http://solr:8983
  web:
    links:
      - solr:solr
volumes:
  # solr is a persistent Docker volume for solr data
  # The persistent volume should have the same name as the service so it can be deleted
  # when the project is deleted.
  solr: