前面讲了Elasticsearch7的安装步骤，今天讲讲Elasticsearch8的安装，大同小异。

1、配置环境变量

.env 文件设置运行 docker-compose.yml 配置文件时使用的环境变量。 确保使用 ELASTIC_PASSWORD 和 KIBANA_PASSWORD 变量为 elastic 和 kibana_system 用户指定密码。 这些变量由 docker-compose.yml 文件引用。

vim .env

######
# Password for the 'elastic' user (at least 6 characters)
ELASTIC_PASSWORD=password# Password for the 'kibana_system' user (at least 6 characters)
KIBANA_PASSWORD=password# Version of Elastic products
STACK_VERSION=8.9.1# Set the cluster name
CLUSTER_NAME=docker-cluster# Set to 'basic' or 'trial' to automatically start the 30-day trial
LICENSE=basic
#LICENSE=trial# Port to expose Elasticsearch HTTP API to the host
ES_PORT=9200
#ES_PORT=127.0.0.1:9200# Port to expose Kibana to the host
KIBANA_PORT=5601
#KIBANA_PORT=80# Increase or decrease based on the available host memory (in bytes)
MEM_LIMIT=1073741824# Project namespace (defaults to the current folder name if not set)
#COMPOSE_PROJECT_NAME=myproject

2、配置compose文件

这个 docker-compose.yml 文件创建了一个启用了身份验证和网络加密的安全 Elasticsearch 集群，节点数根据实际情况配置，以及一个安全连接到它的 Kibana 实例，如果不需要可直接去掉。

暴露端口：

此配置在所有网络接口上公开端口 9200。 由于 Docker 处理端口的方式，未绑定到 localhost 的端口使你的 Elasticsearch 集群可公开访问，可能会忽略任何防火墙设置。 如果您不想将端口 9200 暴露给外部主机，请将 .env 文件中的 ES_PORT 的值设置为 127.0.0.1:9200 之类的值。 Elasticsearch 将只能从主机本身访问。

docker-compose.yml 内容如下：

version: "2.2"services:setup:image: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}volumes:- certs:/usr/share/elasticsearch/config/certsuser: "0"command: >bash -c 'if [ x${ELASTIC_PASSWORD} == x ]; thenecho "Set the ELASTIC_PASSWORD environment variable in the .env file";exit 1;elif [ x${KIBANA_PASSWORD} == x ]; thenecho "Set the KIBANA_PASSWORD environment variable in the .env file";exit 1;fi;if [ ! -f certs/ca.zip ]; thenecho "Creating CA";bin/elasticsearch-certutil ca --silent --pem -out config/certs/ca.zip;unzip config/certs/ca.zip -d config/certs;fi;if [ ! -f certs/certs.zip ]; thenecho "Creating certs";echo -ne \"instances:\n"\"  - name: es01\n"\"    dns:\n"\"      - es01\n"\"      - localhost\n"\"    ip:\n"\"      - 127.0.0.1\n"\> config/certs/instances.yml;bin/elasticsearch-certutil cert --silent --pem -out config/certs/certs.zip --in config/certs/instances.yml --ca-cert config/certs/ca/ca.crt --ca-key config/certs/ca/ca.key;unzip config/certs/certs.zip -d config/certs;fi;echo "Setting file permissions"chown -R root:root config/certs;find . -type d -exec chmod 750 \{\} \;;find . -type f -exec chmod 640 \{\} \;;echo "Waiting for Elasticsearch availability";until curl -s --cacert config/certs/ca/ca.crt https://es01:9200 | grep -q "missing authentication credentials"; do sleep 30; done;echo "Setting kibana_system password";until curl -s -X POST --cacert config/certs/ca/ca.crt -u elastic:${ELASTIC_PASSWORD} -H "Content-Type: application/json" https://es01:9200/_security/user/kibana_system/_password -d "{\"password\":\"${KIBANA_PASSWORD}\"}" | grep -q "^{}"; do sleep 10; done;echo "All done!";'healthcheck:test: ["CMD-SHELL", "[ -f config/certs/es01/es01.crt ]"]interval: 1stimeout: 5sretries: 120es01:depends_on:setup:condition: service_healthyimage: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}volumes:- certs:/usr/share/elasticsearch/config/certs- esdata01:/usr/share/elasticsearch/dataports:- ${ES_PORT}:9200environment:- node.name=es01- cluster.name=${CLUSTER_NAME}- cluster.initial_master_nodes=es01#- discovery.seed_hosts=es02- ELASTIC_PASSWORD=${ELASTIC_PASSWORD}- bootstrap.memory_lock=true- xpack.security.enabled=true- xpack.security.http.ssl.enabled=true- xpack.security.http.ssl.key=certs/es01/es01.key- xpack.security.http.ssl.certificate=certs/es01/es01.crt- xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt- xpack.security.http.ssl.verification_mode=certificate- xpack.security.transport.ssl.enabled=true- xpack.security.transport.ssl.key=certs/es01/es01.key- xpack.security.transport.ssl.certificate=certs/es01/es01.crt- xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt- xpack.security.transport.ssl.verification_mode=certificate- xpack.license.self_generated.type=${LICENSE}mem_limit: ${MEM_LIMIT}ulimits:memlock:soft: -1hard: -1healthcheck:test:["CMD-SHELL","curl -s --cacert config/certs/ca/ca.crt https://localhost:9200 | grep -q 'missing authentication credentials'",]interval: 10stimeout: 10sretries: 120kibana:depends_on:es01:condition: service_healthyimage: docker.elastic.co/kibana/kibana:${STACK_VERSION}volumes:- certs:/usr/share/kibana/config/certs- kibanadata:/usr/share/kibana/dataports:- ${KIBANA_PORT}:5601environment:- SERVERNAME=kibana- ELASTICSEARCH_HOSTS=https://es01:9200- ELASTICSEARCH_USERNAME=kibana_system- ELASTICSEARCH_PASSWORD=${KIBANA_PASSWORD}- ELASTICSEARCH_SSL_CERTIFICATEAUTHORITIES=config/certs/ca/ca.crtmem_limit: ${MEM_LIMIT}healthcheck:test:["CMD-SHELL","curl -s -I http://localhost:5601 | grep -q 'HTTP/1.1 302 Found'",]interval: 10stimeout: 10sretries: 120volumes:certs:driver: localesdata01:driver: localkibanadata:driver: localnetworks:app-tier:name: app-tierdriver: bridge

3、启动

docker-compose up -d

4、停止及删除部署

完成实验后，你可以删除网络、容器和 volumes：

docker-compose down -v
docker-compose -f docker-compose-es8.yaml down -v

5、挂载配置

先拷贝配置出来

docker cp kibana:/usr/share/kibana/config/ /usr/local/docker/everything-docker/es8/kibana
docker cp es:/usr/share/elasticsearch/config/ /usr/local/docker/everything-docker/es8/es