Monitor Any Service on Linux

Hello there, In this post, we will look at how to monitor any Linux service using the Zabbix agent.

Services like: nginx, mysql, httpd,

Hope you're Ready! ??

Pre-requests:??

1. Zabbix agent should be installed on machine.
2. Enable remote commands on zabbix_agentd.conf

Enable Remote Commands on Zabbix-agent:???

Step 1: Login to the client machine and open the zabbix_agentd.conf

Step 2: Append this line on config AllowKey=system.run[*]

Step 3: Restart zabbix-agent

Create a Template for Service Monitor: ??

Step 1: Create a Template

Go to Zabbix Dashboard --> Data Collection -->Templates

Step 2: Add Template Name , Template groups ??

• Template Name: service monitor
• Template groups: service
• then click Add

Step 3: Create Item

• Search the template we have created
• Go to Items and choose create item

Step 4: Create a New item for service monitor ??

• Name: nginx service monitor
• Key : system.run[systemctl is-active nginx]

Note: We using same Linux service command to check the status of nginx service. You can modify any other service command

• Update Interval: 1m

Step 5: Navigate to Pre-processing ???

• We are going to map the value active=1
• Choose: Name = Regular expression
• Parameters: \bactive\b
• output: 1
• Check box custom on fail , below choose Set value to = 0
• Type of Information: Numeric(unsigned)

Step 6: Test the output ??

• Now choose Test And Enter the Host (nginx service host), Port.
• Click Get Value and Test

If you get Result = 1 .Good to go...??

Then click Add to save the configuration.

Step 7: Create Trigger for service down ??

Go to trigger create a Trigger

• Enter details like below:
• Name: nginx service down
• Operational Data: {ITEM.LASTVALUE}
• Severity: Average [ Choose as per your requirement ]
• Problem expression: last(/service monitor/system.run[systemctl is-active nginx],#2)<>1
• Ok Event generation: Recovery Expression
• Recovery expression: last(/service monitor/system.run[systemctl is-active nginx],#2)<>1
• Then Add for Save.

zabbix will trigger alert when service is not equal to active

Step 8: Create Graph for Service ??

• Navigate to Graph
• Name: service nginx
• Y axis Min: 0
• Y axis Max: 2
• Items: nginx service monitor [ click Add then choose by select ]
• Then click Add to save.

Step 9: Add host to service monitor ???

• Navigate to host and create a host
• Add the templates "service monitor"
• OR You can choose existing host and add the another template as service monitor.

Now Navigate to Latest Data --> Hosts.

In Host --> Graphs ,here you can see the data and Graph for the nginx service.

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