Docker 使用 Kibana 組成 2 節點 Elasticsearch 集群

Question

我在設置 docker-compose.yml 文件以獲取 2 個與 Kibana 一起運行的 Elasticsearch 節點時遇到問題。

收到錯誤'Kibana server is not ready yet'

在我得到的容器日志中

{"type":"log","@timestamp":"2020-04-11T13:19:45Z","tags":["warning","elasticsearch","data"],"pid":7,"message":"No living connections"}
{"type":"log","@timestamp":"2020-04-11T13:19:45Z","tags":["warning","plugins","licensing"],"pid":7,"message":"License information could not be obtained from Elasticsearch due to Error: No Living connections error"}
{"type":"log","@timestamp":"2020-04-11T13:19:45Z","tags":["warning","elasticsearch","admin"],"pid":7,"message":"Unable to revive connection: http://elasticsearch:9200/"}

我的 docker-compose.yml 文件如下所示：

version: '3'
services:

  #PHP Service
  app:
    build:
      context: .
      dockerfile: Dockerfile
    image: digitalocean.com/php
    container_name: app
    restart: unless-stopped
    tty: true
    environment:
      SERVICE_NAME: app
      SERVICE_TAGS: dev
    working_dir: /var/www
    volumes:
      - ./:/var/www
      - ./php/local.ini:/usr/local/etc/php/conf.d/local.ini
    ports:
      - "9000:9000"
    networks:
      - app-network

  #Nginx Service
  webserver:
    image: nginx:alpine
    container_name: webserver
    restart: unless-stopped
    tty: true
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./:/var/www
      - ./nginx/conf.d/:/etc/nginx/conf.d/
    networks:
      - app-network

  #MySQL Service
  db:
    image: mysql:5.7.29
    container_name: db
    restart: unless-stopped
    tty: true
    ports:
      - "3306:3306"
    environment:
      MYSQL_DATABASE: pipeup
      MYSQL_USER: pu_admin
      MYSQL_PASSWORD: secret
      MYSQL_ROOT_PASSWORD: secret
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
      - dbdata:/var/lib/mysql/
      - ./mysql/my.cnf:/etc/mysql/my.cnf
    networks:
      - app-network
  #Redis
  cache:
    image: redis:rc-alpine3.11
    container_name: cache
    ports:
      - "6382:6379"
    networks:
      - app-network

  # Elasticsearch 
  elasticsearch01:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
    container_name: elasticsearch01
    environment:
      - cluster.name=docker-cluster
      - discovery.seed_hosts=elasticsearch02
      - cluster.initial_master_nodes=elasticsearch01,elasticsearch02
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - node.name=elasticsearch01
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - "9200:9200"
    volumes:
      - esdata01:/usr/share/elasticsearch/data
    networks:
      - app-network

  elasticsearch02:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
    container_name: elasticsearch02
    environment:
      - cluster.name=docker-cluster
      - discovery.seed_hosts=elasticsearch01
      - cluster.initial_master_nodes=elasticsearch01,elasticsearch02
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - node.name=elasticsearch02
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata02:/usr/share/elasticsearch/data
    networks:
      - app-network

  kibana:
    image: docker.elastic.co/kibana/kibana:7.6.2
    container_name: kibana
    environment:
      - "elasticsearch.hosts=http://elasticsearch:9200"
    ports:
      - "5601:5601"
    networks:
      - app-network

#Docker Networks
networks:
  app-network:
    driver: bridge
#Volumes
volumes:
  dbdata:
    driver: local
  esdata01:
    driver: local
  esdata02:
    driver: local

Answer 1

您需要像這樣設置主機並指向其中一個容器。

將您的 docker-compose.yml 更改為：

kibana:
    image: docker.elastic.co/kibana/kibana:7.6.2
    container_name: kibana
    environment:
      - "ELASTICSEARCH_HOSTS=http://elasticsearch01:9200" # Change this
    ports:
      - "5601:5601"
    networks:
      - app-network

Answer 2

要完成這項工作，您應該正確設置ELASTICSEARCH_HOSTS環境變量：

kibana:
    image: docker.elastic.co/kibana/kibana:7.6.2
    container_name: kibana
    environment:
      - ELASTICSEARCH_HOSTS=["http://elasticsearch01:9200","http://elasticsearch02:9200"]

這顯示了如何設置此環境變量以由 Kibana 容器為多個 elasticsearch 主機選擇（我剛剛測試過）。

如果您只想要一台主機，請使用：

kibana:
    image: docker.elastic.co/kibana/kibana:7.6.2
    container_name: kibana
    environment:
      - ELASTICSEARCH_HOSTS=http://elasticsearch01:9200