# CentOS

Before installing the agent on the operating systems we support below, you need to download the certificate according to the instructions at [Initialize Certificate](https://docs-vngcloud-vn.translate.goog/vng-cloud-document/v/vn/vmonitor/dashboards/logs/lam-viec-voi-log-agent/khoi-tao-certificate) . Information on setting up the agent is in the readme file, and the instruction scripts are also in the downloaded certificate file. Use this information with the instructions below to complete Agent for Log setup.

**Setting**

Determine the type of agent you want to install and follow that agent's instructions below:

FilebeatLogstash

* If using a script prepared in the download folder, run the command

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><pre><code>sudo chmod +x filebeat.sh
sudo ./filebeat.sh &#x3C;path-to-file-log>
</code></pre></td></tr></tbody></table>

* If installing manually, run the command

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><pre><code>Tải tệp tin rpm: curl -L -O https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-8.7.1-x86_64.rpm
Install filebeat: sudo rpm -vi filebeat-8.7.1-x86_64.rpm
</code></pre></td></tr></tbody></table>

Next you need to configure agent log. The configuration files below have been prepared by us in the script when downloading the certificate. The description below helps readers imagine what it would be like if we created a manual.

**Configuration**

Filebeat

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><ul><li>File <code>/etc/filebeat/filebeat.yml</code>. The configuration below will retrieve all logs in the file <code>/var/log/app.log</code>and push them to vMonitor Platform:</li><li><p>In which In input the path to the log file</p><p>In output , the variables you need to fill in are taken from the certificate loading step above:</p><ul><li><code>$BOOTSTRAP_SERVERS, $TOPIC</code>taken from file <a href="http://info.md/">info.md</a></li><li><code>$PATH_FILE_VNG_TRUST_PEM, $PATH_FILE_USER_CER_PEM, $PATH_FILE_USER_KEY_PEM</code>is the path to the file VNG.trust.pem user.cer.pem user.key.pem</li></ul></li><li>Read more advanced configurations at<a href="https://www.elastic.co/guide/en/beats/filebeat/current/configuring-howto-filebeat.html"><img src="https://docs.vngcloud.vn/~gitbook/image?url=https%3A%2F%2Fwww.elastic.co%2Ffavicon-16x16.png&#x26;width=300&#x26;dpr=4&#x26;quality=100&#x26;sign=2f0b66d1&#x26;sv=1" alt="">Configure Filebeat | Filebeat Reference [8.8] | Elastic</a></li></ul></td></tr><tr><td></td></tr><tr><td><pre><code>filebeat.inputs:
- type: log
  paths:
    - /var/log/app.log
output.kafka:
hosts: ["$BOOTSTRAP_SERVERS"]
topic: "$TOPIC"
partition.round_robin:
reachable_only: false
required_acks: 1
compression: gzip
max_message_bytes: 1000000
ssl.certificate_authorities:
- $PATH_FILE_VNG_TRUST_PEM
ssl.certificate: "$PATH_FILE_USER_CER_PEM"
ssl.key: "$PATH_FILE_USER_KEY_PEM"
ssl.verification_mode: "none"
logging.level: info
logging.to_files: true
logging.files:
path: /var/log/filebeat
name: filebeat
keepfiles: 7
permissions: 0644
</code></pre></td></tr><tr><td><pre><code>filebeat.inputs:
type: log
paths:
/var/log/app.log
output.kafka:
hosts: ["$BOOTSTRAP_SERVERS"]
topic: "$TOPIC"
partition.round_robin:
reachable_only: false
required_acks: 1
compression: gzip
max_message_bytes: 1000000
ssl.certificate_authorities:
$PATH_FILE_VNG_TRUST_PEM
ssl.certificate: "$PATH_FILE_USER_CER_PEM"
ssl.key: "$PATH_FILE_USER_KEY_PEM"
ssl.verification_mode: "none"
logging.level: info
logging.to_files: true
logging.files:
path: /var/log/filebeat
name: filebeat
keepfiles: 7
permissions: 0644
</code></pre></td></tr><tr><td><pre><code>filebeat.inputs:
type: log
paths:
/var/log/app.log
output.kafka:
hosts: ["$BOOTSTRAP_SERVERS"]
topic: "$TOPIC"
partition.round_robin:
reachable_only: false
required_acks: 1
compression: gzip
max_message_bytes: 1000000
ssl.certificate_authorities:
$PATH_FILE_VNG_TRUST_PEM
ssl.certificate: "$PATH_FILE_USER_CER_PEM"
ssl.key: "$PATH_FILE_USER_KEY_PEM"
ssl.verification_mode: "none"
logging.level: info
logging.to_files: true
logging.files:
path: /var/log/filebeat
name: filebeat
keepfiles: 7
permissions: 0644
</code></pre></td></tr></tbody></table>

***

**Administration**

Filebeat

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><ul><li>Start</li><li>Enable</li><li>Stop</li><li>Reload</li><li>Restart</li><li>Observe</li><li>Uninstall</li></ul></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl start logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl enable logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl stop logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl reload logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl restart logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>systemctl status logstash
journalctl -f --unit logstash
tail -f /var/log/logstash
</code></pre></td></tr><tr><td></td></tr><tr><td><pre><code>yum remove logstash
</code></pre></td></tr><tr><td><pre><code>systemctl start logstash
</code></pre></td></tr><tr><td><pre><code>systemctl enable logstash
</code></pre></td></tr><tr><td><pre><code>systemctl stop logstash
</code></pre></td></tr><tr><td><pre><code>systemctl reload logstash
</code></pre></td></tr><tr><td><pre><code>systemctl restart logstash
</code></pre></td></tr><tr><td><pre><code>systemctl status logstash
journalctl -f --unit logstash
tail -f /var/log/logstash
</code></pre></td></tr><tr><td><pre><code>yum remove logstash
</code></pre></td></tr><tr><td><pre><code>systemctl start logstash
</code></pre></td></tr><tr><td><pre><code>systemctl enable logstash
</code></pre></td></tr><tr><td><pre><code>systemctl stop logstash
</code></pre></td></tr><tr><td><pre><code>systemctl reload logstash
</code></pre></td></tr><tr><td><pre><code>systemctl restart logstash
</code></pre></td></tr><tr><td><pre><code>systemctl status logstash
journalctl -f --unit logstash
tail -f /var/log/logstash
</code></pre></td></tr></tbody></table>