elasticsearch7.6 安装 并且开启外网访问，真的好累。

下载

下载页面

https://www.elastic.co/cn/downloads/elasticsearch

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.1-linux-x86_64.tar.gz

写在前面 因为es7.6 已经内置了jdk，所以机器不需要有java环境。如果机器有java环境，务必保持和es版本匹配的java环境

es 默认不能已root 用户启动

所以新建 es用户

adduser es
passwd es

把es包移动到es用户的工作目录

mv elasticsearch-7.6.-linux-x86_64.tar.gz /home/es

切换es 用户

su es

解压

tar -zxvf elasticsearch-7.6.-linux-x86_64.tar.gz

启动 es

./elasticsearch-7.6./bin/elasticsearch

配置外网可访问

vim elasticsearch-7.6./config/elasticsearch.yml

修改

# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
# ip 地址填写 ip addr 出现的静态IP
network.host: 172.17.0.15
#

重新启动

ERROR: [] bootstrap checks failed
[]: max virtual memory areas vm.max_map_count [] is too low, increase to at least []
[]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

解决

切换到root用户
su root
echo "vm.max_map_count=262144" > /etc/sysctl.conf
sysctl -p

重新启动

./elasticsearch-7.6./bin/elasticsearch

出现错误，要疯了

[]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

解决办法

vim elasticsearch。yml

cluster.name: my-es
node.name: node-
cluster.initial_master_nodes: ["node-1"]

重点是 node。name和cluster.initial_master_nodes 要设置

浏览器访问ip:9200

{
  "name" : "node-1",
  "cluster_name" : "my-es",
  "cluster_uuid" : "hd06lHxERYqnq0hnN7eQSw",
  "version" : {
    "number" : "7.6.1",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "aa751e09be0a5072e8570670309b1f12348f023b",
    "build_date" : "2020-02-29T00:15:25.529771Z",
    "build_snapshot" : false,
    "lucene_version" : "8.4.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

公网终于可以了。

安装插件

./elasticsearch-plugin install analysis-icu

访问 ip：9200/_cat/plugins

node- analysis-icu 7.6.

_cat api 提供了一些es 集群信息的接口。可以访问 ip：9200/_cat来获取查看

http://11111:9200/_cat

=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates

一台机器 多节点启动

./elasticsearch-7.6./bin/elasticsearch -E node.name=node1 -E cluster.name=es-cluster -E path.data=node1_data -d

./elasticsearch-7.6./bin/elasticsearch -E node.name=node2 -E cluster.name=es-cluster -E path.data=node2_data -d

./elasticsearch-7.6./bin/elasticsearch -E node.name=node2 -E cluster.name=es-cluster -E path.data=node2_data -d

如果出现
OpenJDK -Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, , ) failed; error='Not enough space' (errno=)
    at org.elasticsearch.tools.launchers.JvmErgonomics.flagsFinal(JvmErgonomics.java:)
    at org.elasticsearch.tools.launchers.JvmErgonomics.finalJvmOptions(JvmErgonomics.java:)

需要去jvm.options,修改es启动所需要的最大最小堆内存或者增大机器内存