Operating System Version: centos 7.6
Version: elasticsearch 7.6.1
jdk version 11.0.6
server list:
192.168.0.31
192.168.0.32
192.168.0.33
1, the installation jdk 11
The specific steps will be omitted
2, installation elasticsearch
Official website to download elasticsearch-7.6.1-x86_64 rpm installation package
rpm -ivh elasticsearch-7.6.1-x86_64.rpm
Modify the configuration file
#cat /etc/elasticsearch/elasticsearch.yml |grep -v "^#"
cluster.name: Hnbd# Cluster name
node.name: Es-31# Cluster node name
path.data: /var/lib/elasticsearch# Data file path
path.logs: /var/log/elasticsearch# Log file path
bootstrap.memory_lock: true# Locking physical memory address, prevent elasticsearch memory is swapped out, that is, to avoid the use of swap swap es
network.host: 0.0.0.0#ip address
http.port: 9200# Open port numbers
discovery.seed_hosts: ["192.168.0.31","192.168.0.32", "192.168.0.33"]# Set cluster nodes address
cluster.initial_master_nodes: ["Es-31"]# Specify the primary node list
http.cors.enabled: true# Enable cross-domain access, head plugins need to open these two configuration
http.cors.allow-origin: "*"
Add boot service starts
systemctl enable elasticsearch.service
Set JVM heap memory size, set according to the size of the server's memory, preferably not more than half of the total memory
#cat /etc/elasticsearch/jvm.options
## JVM configuration
# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
-Xms2g
-Xmx2g
Set the JAVA_HOME elasticsearch
#cat /etc/sysconfig/elasticsearch |grep "JAVA_HOME"
JAVA_HOME=/usr/java/jdk-11.0.6/
centos7 systemd need to modify the configuration, otherwise an error will start
/etc/systemd/system.conf
DefaultLimitNOFILE=65536
DefaultLimitNPROC=32000
DefaultLimitMEMLOCK=infinity
ERROR: bootstrap checks failed memory locking requested for elasticsearch process but memory is not locked
Official website Description:
elasticsearch official website recommended production environment requires setting bootstrap.memory_lock: true
Explained the official website
They are: swapping occurs when system performance ES nodes will be very poor, will affect the stability of the node. So at all costs to avoid swapping. swapping cause deterioration Java GC cycle delay from milliseconds to minutes, is more serious or even cause a response delay from the cluster node. So the best locked elasticsearch occupation of memory, optional use less swap
centos7 systemd need to modify the configuration, centos6 not the same
3, mounting elasticsearch-head plug
elasticsearch 7.6 is the need to install a separate plug-in, plug-in that comes with the old version before
Installation dependencies
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc xmlto docbook2X gcc-c++ autoconf bzip2 -y
cd /usr/local/src/
Get the source package using git
git clone https://github.com/mobz/elasticsearch-head.git
Installation nodejs
curl -sL https://rpm.nodesource.com/setup_10.x | bash -
yum install -y nodejs
#node -v
v10.19.0
#npm -v
6.13.4
Installation grunt client program to control head plug
npm install -g grunt --registry=https://registry.npm.taobao.org
npm install -g grunt-cli --registry=https://registry.npm.taobao.org
npm install grunt-contrib-clean --registry=https://registry.npm.taobao.org
npm install grunt-contrib-concat --registry=https://registry.npm.taobao.org
npm install grunt-contrib-watch --registry=https://registry.npm.taobao.org
npm install grunt-contrib-connect --registry=https://registry.npm.taobao.org
npm install grunt-contrib-copy --registry=https://registry.npm.taobao.org
npm install grunt-contrib-jasmine --registry=https://registry.npm.taobao.org
Gruntfile.js modify the configuration file, add hostname field
connect: {
server: {
options: {
port: 9100,
hostname: "*",
base: '.',
keepalive: true
}
}
}
Modify /usr/local/elasticsearch-head/_site/app.js changed the default port number 9100 to 9200, this port is the http port head provided externally, to localhost instead of the machine to access the external address
this.base_uri = this.config.base_uri || this.prefs.get("app-base_uri") || "http://192.168.0.31:9100";
Note: The front elasticsearch.yml configuration file must be open access cross-domain configuration file (http.cors.enabled: true http.cors.allow-origin: "*")
Start elasticsearch-head
#cd /usr/local/elasticsearch-head
#nohup grunt server &
Browser opens elasticsearch-head
http://192.168.0.31:9100/
