Install ElasticSearch

Pull the image and select version 6.5.0

$ docker pull elasticsearch:6.5.0

View mirroring

$ docker images

Start a container

$ docker run --name elasticsearch -d -e ES_JAVA_OPTS="-Xms512m -Xmx512m" -p 9200:9200 -p 9300:9300 elasticsearch:6.5.0
42d639a089348b393b0cc912141ef357b6565996c5c4863e363f8729da229d7d

Then visit GET localhost:9200, find that it did not start successfully, and check the log

$ docker logs -f 42d6
[2018-12-05T06:07:06,546][INFO ][o.e.b.BootstrapChecks    ] [IHubvTB] bound or publishing to a non-loopback address, enforcing bootstrap checks
ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2018-12-05T06:07:06,630][INFO ][o.e.n.Node               ] [IHubvTB] stopping ...
[2018-12-05T06:07:06,939][INFO ][o.e.n.Node               ] [IHubvTB] stopped
[2018-12-05T06:07:06,939][INFO ][o.e.n.Node               ] [IHubvTB] closing ...
[2018-12-05T06:07:06,973][INFO ][o.e.n.Node               ] [IHubvTB] closed

Here's a hint: vm.max map count [65530] is too low, increase to at least [262144], saying that the value of Max map count is too small and needs to be set to 262144

View the value of Max map count

$ cat /proc/sys/vm/max_map_count
65530

Reset the value of Max map count

$ sysctl -w vm.max_map_count=262144
vm.max_map_count = 262144

Start container again

$ docker start 42d6

Visit get localhost again: 9200

{
    "name": "IHubvTB",
    "cluster_name": "docker-cluster",
    "cluster_uuid": "edN3o1PkTAKF5C4N-Uw7tQ",
    "version": {
        "number": "6.5.0",
        "build_flavor": "default",
        "build_type": "tar",
        "build_hash": "816e6f6",
        "build_date": "2018-11-09T18:58:36.352602Z",
        "build_snapshot": false,
        "lucene_version": "7.5.0",
        "minimum_wire_compatibility_version": "5.6.0",
        "minimum_index_compatibility_version": "5.0.0"
    },
    "tagline": "You Know, for Search"
}

Installation succeeded.

head plug in installation

5.x version head plug-in installation instructions

For version 1.x and 2.x, you can directly use the plugin command to install the head plug-in

Version 5.x or above cannot be installed through plugin command.

https://github.com/mobz/elasticsearch-head Document description:

Running as a plugin of Elasticsearch (deprecated)
for Elasticsearch 5.x: site plugins are not supported. Run as a standalone server
for Elasticsearch 2.x: sudo elasticsearch/bin/plugin install mobz/elasticsearch-head
for Elasticsearch 1.x: sudo elasticsearch/bin/plugin -install mobz/elasticsearch-head/1.x
for Elasticsearch 0.x: sudo elasticsearch/bin/plugin -install mobz/elasticsearch-head/0.9
open http://localhost:9200/_plugin/head/

Need to run a service with node

Running with built in server
git clone git://github.com/mobz/elasticsearch-head.git
cd elasticsearch-head
npm install
npm run start
open http://localhost:9100/
This will start a local webserver running on port 9100 serving elasticsearch-head

But there is another way to install it, which is through docker. The difference is that the access address changes to http://localhost:9100/

Running with docker
for Elasticsearch 5.x: docker run -p 9100:9100 mobz/elasticsearch-head:5
for Elasticsearch 2.x: docker run -p 9100:9100 mobz/elasticsearch-head:2
for Elasticsearch 1.x: docker run -p 9100:9100 mobz/elasticsearch-head:1
for fans of alpine there is mobz/elasticsearch-head:5-alpine
open http://localhost:9100/

Using docker to install head plug-in

Pull image (select domestic image source here)

$ docker pull hub.c.163.com/riveryang/elasticsearch-head-5.x

Starting container

$ docker run -d -p 9100:9100 --name elasticsearch-head5 hub.c.163.com/riveryang/elasticsearch-head-5.x:5

Then the browser accesses localhost:9200

This interface appears, indicating that the head plug-in is installed successfully.

But we found that the health value was: not connected?

Open the browser for debugging and find the error message:

Access to XMLHttpRequest at 'http://localhost:9200/' from origin 'http://localhost:9100' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

This is a cross domain error

ElasticSearch cross domain settings

Enter the elastic search container

$ docker exec -it 42d639a08934 /bin/bash

Locate the directory for the configuration file

$ /usr/share/elasticsearch/config
$ ls
elasticsearch.keystore  ingest-geoip  log4j2.properties  roles.yml  users_roles
elasticsearch.yml       jvm.options   role_mapping.yml   users

Modify elasticsearch.yml to install vim (refer to https://my.oschina.net/yimingkeji/blog/2978974)

If you are prompted that apt get does not exist, use yum to install vim

$ yum install -y vim

Edit elasticsearch.yml after installation

$ vim elasticsearch.yml
# ----Add content----
# head plug in settings
http.cors.enabled: true
http.cors.allow-origin: "*"

Restart container

$ docker restart 42d639a08934

Access the plug-in again

Installation is complete.