docker-compose example including creation of a collection

docker-compose.yml

# a docker-compose.yml to start a simple cluster with three ZooKeeper nodes and three Solr nodes
# and create a collection
#
# To use:
#
# mkdir mycluster
# cd mycluster
# curl --output docker-compose.yml https://raw.githubusercontent.com/docker-solr/docker-solr-examples/master/docker-compose/docker-compose.yml
# docker-compose up
#
version: '3.7'
services:
  solr1:
    container_name: solr1
    image: solr:8.2
    ports:
     - "8981:8983"
    environment:
      - ZK_HOST=zoo1:2181,zoo2:2181,zoo3:2181
    networks:
      - solr
    volumes:
      - solr1data:/var/solr

    depends_on:
      - zoo1
      - zoo2
      - zoo3

  solr2:
    image: solr:8.2
    container_name: solr2
    ports:
     - "8982:8983"
    environment:
      - ZK_HOST=zoo1:2181,zoo2:2181,zoo3:2181
    networks:
      - solr
    volumes:
      - solr2data:/var/solr
    depends_on:
      - zoo1
      - zoo2
      - zoo3

  solr3:
    image: solr:8.2
    container_name: solr3
    ports:
     - "8983:8983"
    environment:
      - ZK_HOST=zoo1:2181,zoo2:2181,zoo3:2181
    ports:
      - 8983:8983
    networks:
      - solr
    volumes:
      - solr3data:/var/solr
    depends_on:
      - zoo1
      - zoo2
      - zoo3

  create-collection:
    image: solr:8.2
    container_name: create-collection
    environment:
      - SOLR_HOST=solr1
    networks:
      - solr
    command:
      - bash
      - "-e"
      - "-x"
      - "-c"
      - "wait-for-solr.sh --max-attempts 10 --wait-seconds 5 --solr-url http://$$SOLR_HOST:8983/; solr create_collection -c mycollection -p 8983"

  zoo1:
    image: zookeeper:3.5
    container_name: zoo1
    restart: always
    hostname: zoo1
    ports:
      - 2181:2181
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
    networks:
      - solr
    volumes:
      - zoo1data:/data
      - zoo1datalog:/datalog

  zoo2:
    image: zookeeper:3.5
    container_name: zoo2
    restart: always
    hostname: zoo2
    ports:
      - 2182:2181
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zoo3:2888:3888;2181
    networks:
      - solr
    volumes:
      - zoo2data:/data
      - zoo2datalog:/datalog

  zoo3:
    image: zookeeper:3.5
    container_name: zoo3
    restart: always
    hostname: zoo3
    ports:
      - 2183:2181
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181
    networks:
      - solr
    volumes:
      - zoo3data:/data
      - zoo3datalog:/datalog

networks:
  solr:

volumes:
  solr1data:
  solr2data:
  solr3data:
  zoo1data:
  zoo1datalog:
  zoo2data:
  zoo2datalog:
  zoo3data:
  zoo3datalog:

@makuk66: I'm trying to do something similar - to create a collection with solr create-collection from a different container (host) like you do here, but I want that solr1 to run embedded zookeeper. The problem is that create_collection doesn't work in this case as it gets the zookeeper connection URL from solr1 Solr instance, which claims the address is localhost:9983. That address of course is not reachable on create-collection host:

create-collection  |
create-collection  | Connecting to ZooKeeper at localhost:9983 ...
create-collection  | INFO  - 2023-02-05 15:20:30.865; org.apache.solr.common.cloud.ConnectionManager; Waiting for client to connect to ZooKeeper
create-collection  |
create-collection  | ERROR: java.util.concurrent.TimeoutException: Could not connect to ZooKeeper localhost:9983 within 15000 ms

Do you know if there is a workaround for this problem?

It looks like there is no way to specify a custom ZK_HOST for solr create_collection so instead I went with solr zk upconfig + collection create.

create-collections:
  image: solr:8.11.2
  environment:
    - SOLR_HOST=solr1
    - ZK_HOST=solr1:9983
    - COLLECTION_NAME=mycollection
  networks:
    - solr
  command:
    - bash
    - "-exc"
    - |
      wait-for-solr.sh --max-attempts 10 --wait-seconds 5 --solr-url http://$${SOLR_HOST}:8983/

      solr zk upconfig -n "$${COLLECTION_NAME}_conf" -d "PATH_TO_COLLECTION_CONFIG"

      curl --get -sSf "http://$${SOLR_HOST}:8983/solr/admin/collections?action=CREATE&numShards=1&replicationFactor=1" \
        --data-urlencode "name=$${COLLECTION_NAME}" \
        --data-urlencode "collection.configName=$${COLLECTION_NAME}_conf"

More in this thread:
https://lists.apache.org/thread/vwv9d011vfqo5v8vwrrtzppcnknvn57b