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Automate Install Elasticsearch Cluster with Ansible Playbook | 中文

Please create an elasticsearch user, and the default password is 123456 on the Linux server before starting. This playbook script installs three node clusters. Since the 7.x version will use the bundled JDK, there is no need to install the Java in advance.

Planning Your Installation

Planning for server

IP SSH PORT SSH USER SSH PASSWORD ROOT PASSWORD OS
10.1.207.180 22022 elasticsearch 123456 root123 CentOS Linux release 7.9.2009
10.1.207.181 22022 elasticsearch 123456 root123 CentOS Linux release 7.9.2009
10.1.207.182 22022 elasticsearch 123456 root123 CentOS Linux release 7.9.2009

TIPS： reference Create User in Batch Automation

Planning for nodes

IP Elasticsearch
10.1.207.180 ✓
10.1.207.181 ✓
10.1.207.182 ✓

Planning for the installation directory

| PATH | DESCRIPTION | | /opt/elasticsearch | programs | | ~/elasticsearch_uninstall.sh | uninstall script | | ~/elasticsearch.sh | elasticsearch start & stop shell | | /data01/elasticsearch/logs | log directory | | /data01/elasticsearch/data | data directory | | /data01/elasticsearch/dump | dump directory | | /data01/elasticsearch/temp | temporary directory |

Download Elasticsearch Tar & Ansible Playbook scripts

Create a directory for Ansible Playbook scripts

mkdir -p ~/my-docker-volume/ansible-playbook

Download Ansible playbook scripts

cd ~/my-docker-volume/ansible-playbook
git clone https://github.com/coolbeevip/ansible-playbook.git

Download Elasticsearch tar to directory ~/my-docker-volume/ansible-playbook/packages

wget -P ~/my-docker-volume/ansible-playbook/packages https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.16.1-linux-x86_64.tar.gz --no-check-certificate

Configuration

You can edit the following configuration files to modify the default parameters

main.yml

This file mainly defines the address of the target server the login user name.

- hosts: 10.1.207.180
  user: elasticsearch
  ...
- hosts: 10.1.207.181
  user: elasticsearch
  ...
- hosts: 10.1.207.182
  user: elasticsearch
  ...

vars_elasticsearch.yml

This file defines variable information such as installation path, data path, installation package file name, port, memory, etc. You can modify these variables according to the actual environment. These variables will be replaced in the following files when they are deployed.

Linux Limits

limits_hard_nproc: '65535'
limits_soft_nproc: '65535'
limits_hard_nofile: '278528'
limits_soft_nofile: '278528'
limits_hard_stack: 'unlimited'
limits_soft_stack: 'unlimited'

Linux user & group

es_user: "elasticsearch"
es_group: "elasticsearch"

Tarball and unzipped directory name

es_tar: "elasticsearch-7.16.1-linux-x86_64.tar.gz"
es_tar_unzip_dir: "elasticsearch-7.16.1"

Installation path

es_home_dir: "/opt/elasticsearch"
es_log_dir: "/data01/elasticsearch/logs"
es_data_dir: "/data01/elasticsearch/data"
es_heap_dump_path: "/data01/elasticsearch/dump"
es_temp_dir: "/data01/elasticsearch/temp"

Elasticsearch configuration

# 网路信息
es_network_host: "0.0.0.0"
es_http_port: 39200
es_transport_port: 39010
# 集群名称
es_cluster_name: "my-elasticsearch"
# 自动创建索引
es_action_auto_create_index: "true"
# 内存配置
es_heap_size: 8g
es_bootstrap_memory_lock: false

Elasticsearch node name

es_hosts:
  10.1.207.180:
    es_node_name: node-180
  10.1.207.181:
    es_node_name: node-181
  10.1.207.182:
    es_node_name: node-182

XPack Security

es_xpack_security_enabled: false
ex_xpack_security_users:
  - username: myadmin
    password: myadmin123
    roles: [superuser]
  - username: mykibana
    password: mykibana123
    roles: [kibana_admin]

TIPS： For more default configuration, please refer to the following file

Installation

Start the Ansible container tool to connect to the target server, And mount directory ~/my-docker-volume/ansible-playbook in the container.

NOTICE: ANSIBLE_SSH_USERS， ANSIBLE_SSH_PASSS is Linux user elasticsearch and password

NOTICE: ANSIBLE_SU_PASSS is the user root password

docker run --name ansible --rm -it \
  -e ANSIBLE_SSH_HOSTS=10.1.207.180,10.1.207.181,10.1.207.182 \
  -e ANSIBLE_SSH_PORTS=22022,22022,22022 \
  -e ANSIBLE_SSH_USERS=elasticsearch,elasticsearch,elasticsearch \
  -e ANSIBLE_SSH_PASSS=123456,123456,123456 \
  -e ANSIBLE_SU_PASSS=root123,root123,root123 \
  -v ~/my-docker-volume/ansible-playbook:/ansible-playbook \
  coolbeevip/ansible:2.8.11-alpine \
  /bin/bash

Install Elasticsearch Cluster

bash-5.0# ansible-playbook -C /ansible-playbook/elasticsearch/main.yml

If you see the following message, the installation is completed(must failed=0)

PLAY RECAP *****************************************************************************************************************************************************************************************************************************************************
10.1.207.180               : ok=43   changed=15   unreachable=0    failed=0    skipped=5    rescued=0    ignored=0
10.1.207.181               : ok=37   changed=9    unreachable=0    failed=0    skipped=11   rescued=0    ignored=0
10.1.207.182               : ok=37   changed=9    unreachable=0    failed=0    skipped=11   rescued=0    ignored=0

TIPS: Because the Elasticsearch installation package will be uploaded to all servers (about 327MB) when the script is executed for the first time, so take longer to run. The first installation on my local machine takes < 5 minutes(upload package takes about 2 minutes, others bring about 3 minutes.)

TIPS: This script is only used for initial installation. Repeated execution of this command may receive a prompt of Elasticsearch has been installed, please uninstall and then reinstall. At this time, you need to use ansible all -m shell -a '~/elasticsearch_uninstall.sh' uninstalls.

TIPS: You can use the following script to delete the temporary files generated during the installation

bash-5.0# ansible all -m shell -a "rm -rf /opt/elasticsearch/elasticsearch-7.16.1-linux-x86_64.tar.gz"

Verify Elasticsearch Cluster

Lookup Elasticsearch PID

bash-5.0# ansible all -m shell -a '~/elasticsearch.sh status'
10.1.207.181 | CHANGED | rc=0 >>
Elasticsearch is Running as PID: 19219
19281

10.1.207.180 | CHANGED | rc=0 >>
Elasticsearch is Running as PID: 17353
17386

10.1.207.182 | CHANGED | rc=0 >>
Elasticsearch is Running as PID: 30660

View Elasticsearch service

TIPS: Add authentication parameters --user myadmin:myadmin123 for RESTful API when enabled XPack Security, for example: ansible all -m shell -a 'curl --user myadmin:myadmin123 http://0.0.0.0:39200/?pretty'. sets the passwords for the built-in userselasticsearch-setup-passwords

bash-5.0# ansible all -m shell -a 'curl http://0.0.0.0:39200/?pretty'
10.1.207.182 | CHANGED | rc=0 >>
{
  "name" : "node-182",
  "cluster_name" : "nc-elasticsearch",
  "cluster_uuid" : "_na_",
  "version" : {
    "number" : "7.16.1",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "5d21bea28db1e89ecc1f66311ebdec9dc3aa7d64",
    "build_date" : "2021-07-02T12:06:10.804015202Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.2",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   522  100   522    0     0   3279      0 --:--:-- --:--:-- --:--:--  3303

10.1.207.181 | CHANGED | rc=0 >>
{
  "name" : "node-181",
  "cluster_name" : "nc-elasticsearch",
  "cluster_uuid" : "_na_",
  "version" : {
    "number" : "7.16.1",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "5d21bea28db1e89ecc1f66311ebdec9dc3aa7d64",
    "build_date" : "2021-07-02T12:06:10.804015202Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.2",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   522  100   522    0     0   3195      0 --:--:-- --:--:-- --:--:--  3222

10.1.207.180 | CHANGED | rc=0 >>
{
  "name" : "node-180",
  "cluster_name" : "nc-elasticsearch",
  "cluster_uuid" : "_na_",
  "version" : {
    "number" : "7.16.1",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "5d21bea28db1e89ecc1f66311ebdec9dc3aa7d64",
    "build_date" : "2021-07-02T12:06:10.804015202Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.2",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   522  100   522    0     0   3139      0 --:--:-- --:--:-- --:--:--  3163

View Elasticsearch cluster status

bash-5.0# ansible all -m shell -a 'curl http://0.0.0.0:39200/_cat/nodes?v'
10.1.207.182 | CHANGED | rc=0 >>
ip           heap.percent ram.percent cpu load_1m load_5m load_15m node.role   master name
10.1.207.181            5          73  17    0.77    0.47     0.37 cdfhilmrstw -      node-181
10.1.207.182            5          35  15    0.64    0.29     0.25 cdfhilmrstw -      node-182
10.1.207.180            5          99  30    3.47    1.92     1.76 cdfhilmrstw *      node-180  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   376  100   376    0     0   3079      0 --:--:-- --:--:-- --:--:--  3107

10.1.207.181 | CHANGED | rc=0 >>
ip           heap.percent ram.percent cpu load_1m load_5m load_15m node.role   master name
10.1.207.181            5          73  17    0.77    0.47     0.37 cdfhilmrstw -      node-181
10.1.207.180            5          99  30    3.47    1.92     1.76 cdfhilmrstw *      node-180
10.1.207.182            5          35  15    0.64    0.29     0.25 cdfhilmrstw -      node-182  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   376  100   376    0     0   3719      0 --:--:-- --:--:-- --:--:--  3722

10.1.207.180 | CHANGED | rc=0 >>
ip           heap.percent ram.percent cpu load_1m load_5m load_15m node.role   master name
10.1.207.181            5          73  17    0.77    0.47     0.37 cdfhilmrstw -      node-181
10.1.207.180            5          99  30    3.47    1.92     1.76 cdfhilmrstw *      node-180
10.1.207.182            5          35  15    0.64    0.29     0.25 cdfhilmrstw -      node-182  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   376  100   376    0     0   9153      0 --:--:-- --:--:-- --:--:--  9400

Common Maintenance Commands

Start Elasticsearch

bash-5.0# ansible all -m shell -a '~/elasticsearch.sh start'

Stop Elasticsearch

bash-5.0# ansible all -m shell -a '~/elasticsearch.sh stop'

Elasticsearch PID

bash-5.0# ansible all -m shell -a '~/elasticsearch.sh status'

Q & A

How to force uninstall

A: The ~/elasticsearch_uninstall.sh script will kill -9 Elasticsearch processes and delete programs and all data

bash-5.0# ansible all -m shell -a '~/elasticsearch_uninstall.sh'
10.1.207.182 | CHANGED | rc=0 >>
Kill Elasticsearch process
Delete Elasticsearch data
Delete Elasticsearch programs
Delete elasticsearch_uninstall.sh

10.1.207.180 | CHANGED | rc=0 >>
Kill Elasticsearch process
Delete Elasticsearch data
Delete Elasticsearch programs
Delete elasticsearch_uninstall.sh

10.1.207.181 | CHANGED | rc=0 >>
Kill Elasticsearch process
Delete Elasticsearch data
Delete Elasticsearch programs
Delete elasticsearch_uninstall.sh