Huawei Cloud Yaoyun Server L instance evaluation | Installation and parameter settings of the Docker version of Elasticsearch & port opening and browser access

Preface

Recently, Huawei Cloud Yaoyun Server L instance was released, and I also built one to play with. During the process, I encountered various problems and learned a lot about operation and maintenance in the process of solving the problems.

This blog introduces the installation and parameter settings of the Docker version of Elasticsearch, port opening and browser access.

The list of other related Huawei Cloud Yaoyun Server L instance evaluation articles is as follows:

• Initialize and configure SSH connection & install MySQL docker image & install redis and master-slave setup & 7.2 version redis.conf configuration file

• Install Java8 environment & configure environment variables & spring project deployment & [!] There are unresolved problems

• Deploying spring project port opening problem solution & server project environment setting up MySQL, Redis, Minio... Guide

• MySQL database was attacked due to own reasons & understanding of MySQL binlog log files

• Understand the redis unauthorized access vulnerability & partial recurrence of the vulnerability & set the connection password & learn other redis commands

• Pull and create canal image configuration related parameters & build canal to connect to MySQL database & spring project application canal preliminary

• Docker version of Minio installation & use in Springboot project & combined with vue for image access

• Install BloomFilter in the Redis Docker container & use the Redis plug-in version of the Bloom filter in Spring

lead out

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1. Installation and parameter settings of the Docker version of Elasticsearch;
2. Port opening and browser access;

1. Query and download ES (docker)

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

Elasticsearch is a distributed, RESTful search and data analysis engine capable of solving a variety of emerging use cases. At the heart of the Elastic Stack, Elasticsearch centralizes your data so you can search quickly, fine-tune relevance, perform powerful analytics, and scale easily.

Inquire

docker search elasticsearch

Pull image

docker pull elasticsearch: version number

docker pull elasticsearch:7.17.7

2. Create es container

1. Create a folder

Create the elasticsearch folder and create subfolders data and config below

2. Modify the access permissions of the folder

 chmod 777 elasticsearch/**

elasticsearch.yml

Create the elasticsearch.yml file in the config folder and modify it to read, write and execute permissions.

 touch elasticsearch/config/elasticsearch.yml
 chmod 777 elasticsearch/config/elasticsearch.yml

Modify the contents of elasticsearch.yml

xpack.security.enabled: Configure es security, but it is only free for 1 month. This machine uses no security module.

http:
  host: 0.0.0.0
  cors:
    enabled: true
    allow-origin: "*"
xpack:
  security:
    enabled: false

3. Configure the environment

Adjust max_map_count

The max_map_count file contains limits on the number of VMAs ( virtual memory areas) a process can have . The default value is 65536.

root@hcss-ecs-52b8:~# sysctl -a | grep vm.max_map_count
vm.max_map_count = 65530
root@hcss-ecs-52b8:~# sysctl -w vm.max_map_count=262144
vm.max_map_count = 262144
root@hcss-ecs-52b8:~#  sysctl -a | grep vm.max_map_count
vm.max_map_count = 262144

4. Create a running container

docker run  -itd \
--name es \
--privileged \
-p 9200:9200 \
-p 9300:9300 \
-e "discovery.type=single-node" \
-e ES_JAVA_OPTS="-Xms84m -Xmx512m" \
-v /usr/local/software/es/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml \
-v /usr/local/software/es/elasticsearch/data:/usr/share/elasticsearch/data \
-v /usr/local/software/es/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
elasticsearch:7.17.7

port

9200

9200, as HTTP protocol, is mainly used for external communication. It is generally used for tools to connect to ElasticSearch. This port is also needed for java to connect to ES.

9300

It is a custom binary protocol used for communication between nodes in the cluster. Used for matters such as cluster changes, master node election, node joining/leaving, shard allocation, etc.

ES_JAVA_OPTS

Specify the JVM memory configuration in the container. It is recommended to be greater than 512M.

3. Modification of es related parameters

5. Modify ES memory size

Enter the container

[root@localhost config]# docker exec -it es bash

Enter the config folder

Modify jvm.options default memory size

root@6fa12b7a6ddb:/usr/share/elasticsearch/config# echo "-Xms4g"  >> jvm.options
root@6fa12b7a6ddb:/usr/share/elasticsearch/config# echo "-Xmx4g"  >> jvm.options

Exit and restart the container

root@6fa12b7a6ddb:/usr/share/elasticsearch/config# exit                         
exit
[root@localhost config]# docker restart es

4. Port opening and access

1. Open port

2. Browser access

Appendix: Installation commands in docker containers

How to install command in docker container?

apt update && apt -y install tree

#在容器内
root@af35113d7d48:/usr/share/elasticsearch/plugins/ik# apt update && apt -y install tree
Get:1 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]

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Summarize

1. Installation and parameter settings of the Docker version of Elasticsearch;
2. Port opening and browser access;