Remove Zabbix agent from Windows and CentOS
At Bobcares, we offer solutions for every query, big and small, as a part of our Server Management Service.
Let’s take a look at how our Support Team recently helped remove Zabbix agent from Windows and CentOS.
How to remove Zabbix agent from Windows and CentOS
A Zabbix agent is a lightweight version of Zabbix that collects different performance data like CPU usage, memory usage, disk space usage, network interface utilization, and so on. Furthermore, it forwards this information to the server for visualization and storage.
9 Zabbix agent on Microsoft Windows
Both generations of Zabbix agents run as a Windows service. For Zabbix agent 2, replace agentd with agent2 in the instructions below.
You can run a single instance of Zabbix agent or multiple instances of the agent on a Microsoft Windows host. A single instance can use the default configuration file C:\zabbix_agentd.conf or a configuration file specified in the command line. In case of multiple instances each agent instance must have its own configuration file (one of the instances can use the default configuration file).
An example configuration file is available in Zabbix source archive as conf/zabbix_agentd.win.conf .
See the configuration file options for details on configuring Zabbix Windows agent.
Hostname parameter
To perform active checks on a host Zabbix agent needs to have the hostname defined. Moreover, the hostname value set on the agent side should exactly match the «Host name» configured for the host in the frontend.
The hostname value on the agent side can be defined by either the Hostname or HostnameItem parameter in the agent configuration file — or the default values are used if any of these parameters are not specified.
The default value for HostnameItem parameter is the value returned by the «system.hostname» agent key. For Windows, it returns result of the gethostname() function, which queries namespace providers to determine the local host name. If no namespace provider responds, the NetBIOS name is returned.
The default value for Hostname is the value returned by the HostnameItem parameter. So, in effect, if both these parameters are unspecified, the actual hostname will be the host NetBIOS name; Zabbix agent will use NetBIOS host name to retrieve the list of active checks from Zabbix server and send results to it.
The «system.hostname» key supports two optional parameters — type and transform.
Type parameter determines the type of the name the item should return. Supported values:
- netbios (default) — returns the NetBIOS host name which is limited to 15 symbols and is in the UPPERCASE only;
- host — case-sensitive, returns the full, real Windows host name (without a domain);
- shorthost (supported since Zabbix 5.4.7) — returns part of the hostname before the first dot. It will return a full string if the name does not contain a dot.
Transform parameter is supported since Zabbix 5.4.7 and allows to specify additional transformation rule for the hostname. Supported values:
- none (default) — use the original letter case;
- lower — convert the text into lowercase.
So, to simplify the configuration of zabbix_agentd.conf file and make it unified, two different approaches could be used.
- leave Hostname or HostnameItem parameters undefined and Zabbix agent will use NetBIOS host name as the hostname;
- leave Hostname parameter undefined and define HostnameItem like this:
HostnameItem=system.hostname[host] — for Zabbix agent to use the full, real (case sensitive) Windows host name as the hostname
HostnameItem=system.hostname[shorthost,lower] — for Zabbix agent to use only part of the hostname before the first dot, converted into lowercase.
Host name is also used as part of Windows service name which is used for installing, starting, stopping and uninstalling the Windows service. For example, if Zabbix agent configuration file specifies Hostname=Windows_db_server , then the agent will be installed as a Windows service » Zabbix Agent [Windows_db_server] «. Therefore, to have a different Windows service name for each Zabbix agent instance, each instance must use a different host name.
Installing agent as Windows service
To install a single instance of Zabbix agent with the default configuration file c:\zabbix_agentd.conf :
On a 64-bit system, a 64-bit Zabbix agent version is required for all checks related to running 64-bit processes to work correctly.
If you wish to use a configuration file other than c:\zabbix_agentd.conf , you should use the following command for service installation:
A full path to the configuration file should be specified.
Multiple instances of Zabbix agent can be installed as services like this:
The installed service should now be visible in Control Panel.
Starting agent
To start the agent service, you can use Control Panel or do it from command line.
To start a single instance of Zabbix agent with the default configuration file:
To start a single instance of Zabbix agent with another configuration file:
To start one of multiple instances of Zabbix agent:
Stopping agent
To stop the agent service, you can use Control Panel or do it from command line.
To stop a single instance of Zabbix agent started with the default configuration file:
To stop a single instance of Zabbix agent started with another configuration file:
To stop one of multiple instances of Zabbix agent:
Uninstalling agent Windows service
To uninstall a single instance of Zabbix agent using the default configuration file:
To uninstall a single instance of Zabbix agent using a non-default configuration file:
To uninstall multiple instances of Zabbix agent from Windows services:
Limitations
Zabbix agent for Windows does not support non-standard Windows configurations where CPUs are distributed non-uniformly across NUMA nodes. If logical CPUs are distributed non-uniformly, then CPU performance metrics may not be available for some CPUs. For example, if there are 72 logical CPUs with 2 NUMA nodes, both nodes must have 36 CPUs each.
How to Remove/Uninstall Zabbix Agent from Windows and CentOS? Print
1. Log in to the VPS using Remote Desktop Protocol (RDP). Please refer to how to log in to VPS using RDP for more details.
2. Open Command Prompt as administrator.
3. Enter the following command to open the Zabbix installation directory.
cd\Program Files\zabbix\bin\win64
4. You can enter the same path if you have installed Zabbix in Program Files (86). Here, we have installed it on the Programme file with 64 bits.
5. Run the command given below to uninstall the Zabbix service.
zabbix_agentd.exe —uninstall
6. Remove the «zabbix_agentd.conf» and «zabbix_agentd» files from the C Drive.
7. Remove the Zabbix folder from the path — C:\Program Files .
8. Delete the Zabbix agent from Zabbix Server.
Following are the steps to remove the Zabbix agent from CentOS.
1. Log in to the VPS using SSH. Please refer to connect VPS using SSH for more details.
2. Enter the following command in the terminal to uninstall the Zabbix agent from CentOS.
# yum remove zabbix-agent -y
3. We need to remove the Zabbix Directory . Type cd /etc/ in the terminal and click the Enter button.
4. Then, type the ls command to load all the folders . Here, you will find a folder named Zabbix .
5. Run the following command to remove the Zabbix folder.
# rm -rf zabbix
6. Next, go to the Zabbix server and delete the Zabbix Agent from it. That’s all.
→ Looking to install Zabbix agent on Debian 10?
Please refer to Install Zabbix on Debian for more details.
→ Looking to install Zabbix Agent 4.0 on Debian 10 (Buster)?
Please refer to Install Zabbix on Debian for more details.
Установка zabbix агента
Рекомендую обратить внимание на централизованное развёртывание агентов https://imbicile.pp.ru/zabbix-agent-ansible/ для linux, так как возможно реализовать такую же установку zabbix агента для windows или попробовать взять готовую роль с сайта zabbix упомянутого в статье
Подготовка
Распаковать архив по пути C:\zabbix\
В моем случае созданы папки для Windows 32 и 64
Отдельно папка под конфигурацию
Настроить файл конфигурации C:\zabbix\conf\zabbix_agentd.win.conf
Рассчитано что он для всех агентов одинаков, и настраивать на каждом компьютере не требуется
- В корне папки zabbix будут созданы скрипты, сюда же будет писаться лог
- Установка агента zabbix
- Удаление агента zabbix
- Попытка решения проблем
- Получение информации от агента
- Перезапуск агента
Во время установки через netsh в брандмауэре открываются порты для zabbix агента 10050 и ping.
Так же делается пересчет счетчиков системы. Это не обязательно, но иногда решает проблемы с чтением данных.
В итоге буде такая структура
Установка zabbix агента install.cmd
Здесь установка только для 64 версии. Раньше была и для 32 но со временем необходимость в ней отпала. Чтобы поставить агент для версии Windows 32 необходимо изменить путь C:\zabbix\bin\win64\ на C:\zabbix\bin\win32\
Во время установки через netsh в брандмауэре открываются порты для zabbix агента 10050 и ICMP Ping.
Так же делается пересчет счетчиков системы. Это не обязательно, но иногда решает проблемы с чтением данных.