Elastic Search Setup in Docker Swarm with xpack.security

Elastic Stack Elasticsearch
1

Hi, I want to create an elastic with kibana and 3 nods. I have my docker compose which I use to setup the config in my docker swarm.

On es01 I get the error:
Caused by: org.elasticsearch.common.ssl.SslConfigException: cannot read configured PEM certificate_authorities [/usr/share/elasticsearch/config/certs/ca/ca.crt] because the file does not exist

When I use my debug container then there is the ca.crt file in this folder.

Here is my compose file.

version: '3.8'
services:
  debug:
    image: alpine
    container_name: debug-container
    entrypoint: sh
    stdin_open: true
    tty: true
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
  setup:
    image: docker.elastic.co/elasticsearch/elasticsearch:8.16.1
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
    user: "0"
    command: >
      bash -c '
        if [ x${ELASTIC_PASSWORD} == x ]; then
          echo "Set the ELASTIC_PASSWORD environment variable in the .env file";
          exit 1;
        elif [ x${KIBANA_PASSWORD} == x ]; then
          echo "Set the KIBANA_PASSWORD environment variable in the .env file";
          exit 1;
        fi;
        if [ ! -f config/certs/ca.zip ]; then
          echo "Creating CA";
          bin/elasticsearch-certutil ca --silent --pem -out config/certs/ca.zip;
          unzip config/certs/ca.zip -d config/certs;
        fi;
        if [ ! -f config/certs/certs.zip ]; then
          echo "Creating certs";
          echo -ne \
          "instances:\n"\c
          "  - name: es01\n"\
          "    dns:\n"\
          "      - ${ES_HOST_NAME_PREFIX}01:9209\n"\
          "  - name: es02\n"\
          "    dns:\n"\
          "      - ${ES_HOST_NAME_PREFIX}02:9209\n"\
          "  - name: es03\n"\
          "    dns:\n"\
          "      - ${ES_HOST_NAME_PREFIX}03:9209\n"\
          > config/certs/instances.yml;
          bin/elasticsearch-certutil cert --silent --pem -out config/certs/certs.zip --in config/certs/instances.yml --ca-cert config/certs/ca/ca.crt --ca-key config/certs/ca/ca.key;
          unzip config/certs/certs.zip -d config/certs;
        fi;
        echo "Setting file permissions"
        chown -R root:root config/certs;
        find . -type d -exec chmod 750 \{\} \;;
        find . -type f -exec chmod 640 \{\} \;;
        echo "Waiting for Elasticsearch availability";
        until curl -s --cacert config/certs/ca/ca.crt https://${ES_HOST_NAME_PREFIX}01:9209 | grep -q "missing authentication credentials"; do sleep 30; done;
        echo "Setting kibana_system password";
        until curl -s -X POST --cacert config/certs/ca/ca.crt -u "elastic:somethingsecret" -H "Content-Type: application/json" https://${ES_HOST_NAME_PREFIX}01:9209/_security/user/kibana_system/_password -d "{\"password\":\"somethingsecret\"}" | grep -q "^{}"; do sleep 10; done;
        echo "All done!";
      '
    healthcheck:
      test: ["CMD-SHELL", "[ -f config/certs/es01/es01.crt ]"]
      interval: 1s
      timeout: 5s
      retries: 30
  es01:
    image: docker.elastic.co/elasticsearch/elasticsearch:8.16.1
    environment:
      - node.name=es01-${STACK_ENV}
      - cluster.name=es-docker-cluster-updated
      - discovery.seed_hosts=${ES_HOST_NAME_PREFIX}01,${ES_HOST_NAME_PREFIX}02,${ES_HOST_NAME_PREFIX}03
      - cluster.initial_master_nodes=es01-${STACK_ENV},es02-${STACK_ENV},es03-${STACK_ENV}   # alle nodes für initiales master voting - muss node.name entsprechen!
      - bootstrap.memory_lock=true
      - network.publish_host=${ES_HOST_NAME_PREFIX}01 # explizit angeben sonst wird container adresse genommen
      - transport.port=9309
      - http.port=9209
      - ES_JAVA_OPTS=-Xms${JAVA_OPTS_HEAPSIZE} -Xmx${JAVA_OPTS_HEAPSIZE}
      - xpack.security.enabled=true
      - xpack.security.http.ssl.enabled=true
      - xpack.security.http.ssl.key=certs/es01/es01.key
      - xpack.security.http.ssl.certificate=certs/es01/es01.crt
      - xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.enabled=true
      - xpack.security.transport.ssl.key=certs/es01/es01.key
      - xpack.security.transport.ssl.certificate=certs/es01/es01.crt
      - xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.verification_mode=certificate
      - xpack.license.self_generated.type=basic
      - ELASTIC_PASSWORD=somethingsecret
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - data01:/usr/share/elasticsearch/data
      - certs:/usr/share/elasticsearch/config/certs
    ports:
      - target: 9209
        published: 9209
        protocol: tcp
        mode: host
      - target: 9309
        published: 9309
        protocol: tcp
        mode: host
    networks:
      - elastic
    deploy:
      placement:
        constraints: 
        - "node.hostname == ${ES_HOST_NAME_PREFIX}01"

  es02:
    image: docker.elastic.co/elasticsearch/elasticsearch:8.16.1
    environment:
      - node.name=es02-${STACK_ENV}
      - cluster.name=es-docker-cluster-updated
      - discovery.seed_hosts=${ES_HOST_NAME_PREFIX}01,${ES_HOST_NAME_PREFIX}02,${ES_HOST_NAME_PREFIX}03
      - cluster.initial_master_nodes=es01-${STACK_ENV},es02-${STACK_ENV},es03-${STACK_ENV}   # alle nodes für initiales master voting - muss node.name entsprechen!
      - bootstrap.memory_lock=true
      - network.publish_host=${ES_HOST_NAME_PREFIX}02 # explizit angeben sonst wird container adresse genommen
      - transport.port=9309
      - http.port=9209
      - ES_JAVA_OPTS=-Xms${JAVA_OPTS_HEAPSIZE} -Xmx${JAVA_OPTS_HEAPSIZE}
      - xpack.security.enabled=true
      - xpack.security.http.ssl.enabled=true
      - xpack.security.http.ssl.key=certs/es02/es02.key
      - xpack.security.http.ssl.certificate=certs/es02/es02.crt
      - xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.enabled=true
      - xpack.security.transport.ssl.key=certs/es02/es02.key
      - xpack.security.transport.ssl.certificate=certs/es02/es02.crt
      - xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.verification_mode=certificate
      - xpack.license.self_generated.type=basic
      - ELASTIC_PASSWORD=somethingsecret
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - target: 9209
        published: 9209
        protocol: tcp
        mode: host
      - target: 9309
        published: 9309
        protocol: tcp
        mode: host
    volumes:
      - data02:/usr/share/elasticsearch/data
      - certs:/usr/share/elasticsearch/config/certs
    networks:
      - elastic
    deploy:
      placement:
        constraints: 
        - "node.hostname == ${ES_HOST_NAME_PREFIX}02"

  es03:
    image: docker.elastic.co/elasticsearch/elasticsearch:8.16.1
    environment:
      - node.name=es03-${STACK_ENV}
      - cluster.name=es-docker-cluster-updated
      - discovery.seed_hosts=${ES_HOST_NAME_PREFIX}01,${ES_HOST_NAME_PREFIX}02,${ES_HOST_NAME_PREFIX}03
      - cluster.initial_master_nodes=es01-${STACK_ENV},es02-${STACK_ENV},es03-${STACK_ENV}   # alle nodes für initiales master voting - muss node.name entsprechen!
      - bootstrap.memory_lock=true
      - network.publish_host=${ES_HOST_NAME_PREFIX}03 # explizit angeben sonst wird container adresse genommen
      - transport.port=9309
      - http.port=9209
      - ES_JAVA_OPTS=-Xms${JAVA_OPTS_HEAPSIZE} -Xmx${JAVA_OPTS_HEAPSIZE}
      - xpack.security.enabled=true
      - xpack.security.http.ssl.enabled=true
      - xpack.security.http.ssl.key=certs/es03/es03.key
      - xpack.security.http.ssl.certificate=certs/es03/es03.crt
      - xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.enabled=true
      - xpack.security.transport.ssl.key=certs/es03/es03.key
      - xpack.security.transport.ssl.certificate=certs/es03/es03.crt
      - xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.verification_mode=certificate
      - xpack.license.self_generated.type=basic
      - ELASTIC_PASSWORD=somethingsecret
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - data03:/usr/share/elasticsearch/data
      - certs:/usr/share/elasticsearch/config/certs
    networks:
      - elastic
    ports:
      - target: 9209
        published: 9209
        protocol: tcp
        mode: host
      - target: 9309
        published: 9309
        protocol: tcp
        mode: host
    deploy:
      placement:
        constraints: 
        - "node.hostname == ${ES_HOST_NAME_PREFIX}03"

  kibana:
    image: docker.elastic.co/kibana/kibana:8.16.1
    volumes:
      - kibanadata:/usr/share/kibana/data
      - certs:/usr/share/elasticsearch/config/certs
    ports:
      - 5609:5609
    environment:
      ELASTICSEARCH_HOSTS: '["http://${ES_HOST_NAME_PREFIX}01:9209","http://${ES_HOST_NAME_PREFIX}02:9209","http://${ES_HOST_NAME_PREFIX}03:9209"]'
      SERVER_PORT: 5609
      SERVER_PUBLICBASEURL: ${KIBANA_URL}
      ELASTICSEARCH_USERNAME: elastic
      ELASTICSEARCH_PASSWORD: somethingsecret
    deploy:
      placement:
        constraints: 
        - "node.hostname == ${ES_HOST_NAME_PREFIX}01"

volumes:
  data01:
    driver: local
  data02:
    driver: local
  data03:
    driver: local
  kibanadata:
    driver: local
  certs:
    driver: local

networks:
  elastic:
    driver: overlay

Thanks for the help.

2

Your elasticsearch containers ( es01,es02,es03) don't depend on your setup container so they're starting before your certificates are generated.

Have a look at the example compose file in the docs

The elasticsearch containers in that example include a depends_on section.

3

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