# Elasticsearch

## 安装

```sh
rpm -ivh elasticsearch-7.11.1-x86_64.rpm

mkdir -p /home/elasticsearch/lib
mkdir -p /home/elasticsearch/log

chown -R elasticsearch:elasticsearch /home/elasticsearch/lib
chown -R elasticsearch:elasticsearch /home/elasticsearch/log


sudo /bin/systemctl daemon-reload
sudo systemctl start elasticsearch.service
sudo /bin/systemctl enable elasticsearch.service

cd /usr/share/elasticsearch/
bin/elasticsearch-certutil ca
bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
cp elastic-certificates.p12 /etc/elasticsearch/elastic-certificates.p12


chown -R elasticsearch:elasticsearch /etc/elasticsearch/elastic-certificates.p12
bin/elasticsearch-setup-passwords interactive

```

## 配置

```yaml
# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: bsw
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: node-3
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
path.data: /var/lib/elasticsearch
#
# Path to log files:
#
path.logs: /var/log/elasticsearch
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
# bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
network.host: 192.168.0.13
#
# Set a custom port for HTTP:
#
#http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
discovery.seed_hosts: ["192.168.0.10", "192.168.0.15", "192.168.0.13"]
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
cluster.initial_master_nodes: ["node-0", "node-5", "node-3"]
#
# For more information, consult the discovery and cluster formation module documentation.
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
#gateway.recover_after_nodes: 3
#
# For more information, consult the gateway module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Require explicit names when deleting indices:
#
#action.destructive_requires_name: true

xpack.security.enabled: true
xpack.license.self_generated.type: basic
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /etc/elasticsearch/elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: /etc/elasticsearch/elastic-certificates.p12
```



# Kibana

## 安装

```shell
rpm -ivh kibana-7.11.1-x86_64.rpm
```

# Logstash

```shell
rpm -ivh logstash-7.11.1-x86_64.rpm
```

配置

kafka.conf

```
# Sample Logstash configuration for creating a simple
# Beats -> Logstash -> Elasticsearch pipeline.

input {
  kafka{
    bootstrap_servers => "192.168.0.10:9092,192.168.0.11:9092,192.168.0.12:9092,192.168.0.13:9092,192.168.0.14:9092"
    topics => ["logstash"]
    consumer_threads => 5
    decorate_events => true
    codec => "json"
    auto_offset_reset => "latest"
  }
}
filter {
    if [@metadata][kafka][topic] == "logstash"{
      mutate { 
        add_field => { "[@metadata][kafka][app]" => "%{[app]}"  } 
        remove_field => "app"
      }
    }
}

output {
  if [@metadata][kafka][topic] == "logstash"{
    elasticsearch {
      hosts => ["http://192.168.0.10:9200"]
      
      index => "log-%{[@metadata][kafka][app]}-%{+YYYY.MM.dd}"
    
      #index => "log-%{[@metadata][kafka][topic]}-%{+YYYY.MM.dd}"
      #user => "elastic"
      #password => "asdf*123"
    }
  }
  stdout { codec => rubydebug }
}
```



# Metricbeat

```shell
rpm -vi metricbeat-7.11.1-x86_64.rpm
cd /usr/share/metricbeat/
metricbeat modules enable elasticsearch-xpack
service metricbeat start
systemctl enable metricbeat
```