Installing and maintaining zabbix-agent for RedHat/Debian/Ubuntu.
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README.md

Table of Contents

Overview

Build Status:

Build Status

This is an role for installing and maintaining the zabbix-agent.

This is one of the 'dj-wasabi' roles which configures your whole Zabbix environment. See an list for the complete list:

Upgrade

1.0.0

With this 1.0.0 release, the following is changed:

  • All configuration properties starts with zabbix_ now. Example, property named agent_tlsaccept is now zabbix_agent_tlsaccept.

0.8.0

As of version 0.8.0, the property zabbix_api_use isn't available anymore. It is replaced by the properties zabbix_api_create_hostgroup and zabbix_api_create_hosts

Requirements

Operating systems

This role will work on the following operating systems:

  • Red Hat
  • Debian
  • Ubuntu
  • opensuse

So, you'll need one of those operating systems.. :-) Please sent Pull Requests or suggestions when you want to use this role for other Operating systems.

Zabbix Versions

See the following list of supported Operating systems with the Zabbix releases:

Zabbix 3.4

  • CentOS 7.x
  • Amazon 7.x
  • RedHat 7.x
  • OracleLinux 7.x
  • Scientific Linux 7.x
  • Ubuntu 14.04, 16.04, 18.04
  • Debian 7, 8, 9

Zabbix 3.2:

  • CentOS 7.x
  • Amazon 7.x
  • RedHat 7.x
  • OracleLinux 7.x
  • Scientific Linux 7.x
  • Ubuntu 14.04, 16.04
  • Debian 7, 8

Zabbix 3.0:

  • CentOS 5.x, 6.x, 7.x
  • Amazon 5.x, 6.x, 7.x
  • RedHat 5.x, 6.x, 7.x
  • OracleLinux 5.x, 6.x, 7.x
  • Scientific Linux 5.x, 6.x, 7.x
  • Ubuntu 14.04
  • Debian 7, 8

Zabbix 2.4:

  • CentOS 6.x, 7.x
  • Amazon 6.x, 7.x
  • RedHat 6.x, 7.x
  • OracleLinux 6.x, 7.x
  • Scientific Linux 6.x, 7.x
  • Ubuntu 12.04 14.04
  • Debian 7

Zabbix 2.2:

  • CentOS 5.x, 6.x
  • RedHat 5.x, 6.x
  • OracleLinux 5.x, 6.x
  • Scientific Linux 5.x, 6.x
  • Ubuntu 12.04
  • Debian 7
  • xenserver 6

Zabbix API

When you want to automatically create the hosts in the webinterface, you'll need on your own machine the zabbix-api package.

You can install this locally with the following command: pip install zabbix-api.

Installation

Installing this role is very simple: ansible-galaxy install dj-wasabi.zabbix-agent

Role Variables

Main variables

There are some variables in de default/main.yml which can (Or needs to) be changed/overriden:

  • zabbix_agent_server: The ipaddress for the zabbix-server or zabbix-proxy.

  • zabbix_agent_serveractive: The ipaddress for the zabbix-server or zabbix-proxy for active checks.

  • zabbix_version: This is the version of zabbix. Default it is 3.2, but can be overriden to 3.0, 2.4, 2.2 or 2.0.

  • zabbix_repo: Default: zabbix

    • epel install agent from EPEL repo
    • zabbix (default) install agent from Zabbix repo
    • other install agent from pre-existing or other repo
  • zabbix_agent_listeninterface: Interface zabbix-agent listens on. Leave blank for all.

  • zabbix_agent_package_state: If Zabbix-agent needs to be present or latest.

  • zabbix_agent_interfaces: A list that configured the interfaces you can use when configuring via API.

  • zabbix_selinux: Enables an SELinux policy so that the agent will run. Default: False.

  • zabbix_agent_userparameters: List of userparameter names and scripts (if any). Detailed description is given in the Deploying Userparameters section. Default: [] (Empty list).

    • name: Userparameter name (should be the same with userparameter template file name)
    • scripts_dir: Directory name of the custom scripts needed for userparameters

Zabbix 3.x

These variables are specific for Zabbix 3.0:

  • zabbix_agent_tlsconnect: How the agent should connect to server or proxy. Used for active checks.

    Possible values:

    • unencrypted
    • psk
    • cert
  • zabbix_agent_tlsaccept: What incoming connections to accept.

    Possible values:

    • unencrypted
    • psk
    • cert
  • zabbix_agent_tlscafile: Full pathname of a file containing the top-level CA(s) certificates for peer certificate verification.

  • zabbix_agent_tlscrlfile: Full pathname of a file containing revoked certificates.

  • zabbix_agent_tlsservercertissuer: Allowed server certificate issuer.

  • zabbix_agent_tlsservercertsubject: Allowed server certificate subject.

  • zabbix_agent_tlscertfile: Full pathname of a file containing the agent certificate or certificate chain.

  • zabbix_agent_tlskeyfile: Full pathname of a file containing the agent private key.

  • zabbix_agent_tlspskidentity: Unique, case sensitive string used to identify the pre-shared key.

  • zabbix_agent_tlspskfile: Full pathname of a file containing the pre-shared key.

  • zabbix_agent_tlspsk_secret: The pre-shared secret key that should be placed in the file configured with agent_tlspskfile.

Zabbix API variables

These variables needs to be changed/overriden when you want to make use of the zabbix-api for automatically creating and or updating hosts.

Host encryption configuration will be set to match agent configuration.

  • zabbix_url: The url on which the Zabbix webpage is available. Example: http://zabbix.example.com

  • zabbix_api_create_hosts: When you want to enable the Zabbix API to create/delete the host. This has to be set to True if you want to make use of zabbix_create_host. Default: False

  • zabbix_api_create_hostgroup: When you want to enable the Zabbix API to create/delete the hostgroups. This has to be set to True if you want to make use of zabbix_create_hostgroup.Default: False

  • zabbix_api_user: Username of user which has API access.

  • zabbix_api_pass: Password for the user which has API access.

  • zabbix_create_hostgroup: present (Default) if the hostgroup needs to be created or absent if you want to delete it. This only works when zabbix_api_create_hostgroup is set to True.

  • zabbix_host_status: enabled (Default) when host in monitored, disabled when host is disabled for monitoring.

  • zabbix_create_host: present (Default) if the host needs to be created or absent is you want to delete it. This only works when zabbix_api_create_hosts is set to True.

  • zabbix_update_host: yes (Default) if the host should be updated if already present. This only works when zabbix_api_create_hosts is set to True.

  • zabbix_useuip: 1 if connection to zabbix-agent is made via ip, 0 for fqdn.

  • zabbix_host_groups: An list of hostgroups which this host belongs to.

  • zabbix_link_templates: An list of templates which needs to be link to this host. The templates should exist.

  • zabbix_macros: An list with macro_key and macro_value for creating hostmacro's.

  • zabbix_inventory_mode: Configure Zabbix inventory mode. Needed for building inventory data, manually when configuring a host or automatically by using some automatic population options. This has to be set to automatic if you want to make automatically building inventory data.

  • zabbix_visible_hostname : Configure Zabbix visible name inside Zabbix web UI for the node.

Other variables

  • zabbix_agent_firewall_enable: If IPtables needs to be updated by opening an TCP port for port configured in zabbix_agent_listenport.

  • zabbix_agent_firewall_source: When provided, IPtables will be configuring to only allow traffic from this IP address/range.

Dependencies

There are no dependencies on other roles.

Example Playbook

agent_interfaces

This will configure the Zabbix Agent interface on the host.

zabbix_agent_interfaces:
  - type: 1
    main: 1
    useip: "{{ zabbix_useuip }}"
    ip: "{{ zabbix_agent_ip }}"
    dns: "{{ ansible_fqdn }}"
    port: "{{ zabbix_agent_listenport }}"

Other interfaces

You can also configure the zabbix_agent_interfaces to add/configure snmp, jmx and ipmi interfaces.

You'll have to use one of the following type numbers when configuring it:

Type Interface Nr
Zabbix Agent 1
snmp 2
ipmi 3
jmx 4

Configuring a snmp interface will look like this:

zabbix_agent_interfaces:
  - type: 2
    main: 1
    useip: "{{ zabbix_useuip }}"
    ip: "{{ agent_ip }}"
    dns: "{{ ansible_fqdn }}"
    port: "{{ agent_listenport }}"

Vars in role configuration

Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:

- hosts: all
  roles:
     - role: dj-wasabi.zabbix-agent
       zabbix_agent_server: 192.168.33.30
       zabbix_agent_serveractive: 192.168.33.30
       zabbix_url: http://zabbix.example.com
       zabbix_api_use: true # use zabbix_api_create_hosts and/or zabbix_api_create_hostgroup from 0.8.0
       zabbix_api_user: Admin
       zabbix_api_pass: zabbix
       zabbix_create_host: present
       zabbix_host_groups:
         - Linux Servers
       zabbix_link_templates:
         - Template OS Linux
         - Apache APP Template
       zabbix_macros:
         - macro_key: apache_type
           macro_value: reverse_proxy

Combination of group_vars and playbook

You can also use the group_vars or the host_vars files for setting the variables needed for this role. File you should change: group_vars/all or host_vars/<zabbix_server> (Where <zabbix_server> is the hostname of the machine running Zabbix Server)

	zabbix_agent_server: 192.168.33.30
    zabbix_agent_serveractive: 192.168.33.30
    zabbix_url: http://zabbix.example.com
    zabbix_api_use: true # use zabbix_api_create_hosts and/or zabbix_api_create_hostgroup from 0.8.0
    zabbix_api_user: Admin
    zabbix_api_pass: zabbix
    zabbix_create_host: present
    zabbix_host_groups:
      - Linux Servers
    zabbix_link_templates:
      - Template OS Linux
      - Apache APP Template
    zabbix_macros:
      - macro_key: apache_type
        macro_value: reverse_proxy

and in the playbook only specifying:

- hosts: all
  roles:
     - role: dj-wasabi.zabbix-agent

Example for TLS PSK encrypted agent communication

Variables e.g. in the playbook or in host_vars/myhost:

zabbix_agent_tlsaccept: psk
zabbix_agent_tlsconnect: psk
zabbix_agent_tlspskidentity: "myhost PSK"
zabbix_agent_tlspsk_secret: b7e3d380b9d400676d47198ecf3592ccd4795a59668aa2ade29f0003abbbd40d
zabbix_agent_tlspskfile: /etc/zabbix/zabbix_agent_pskfile.psk

Molecule

This role is configured to be tested with Molecule. You can find on this page some more information regarding Molecule: https://werner-dijkerman.nl/2016/07/10/testing-ansible-roles-with-molecule-testinfra-and-docker/

With each Pull Request, Molecule will be executed via travis.ci. Pull Requests will only be merged once these tests run successfully.

There are 2 scenarios that are executed with Travis.

default

With the first scenario, Molecule will boot 5 Docker containers with the following OS'es:

  • Debian 8
  • CentOS 7
  • Ubuntu 16.04
  • Ubuntu 18.04
  • Mint

This scenario will be doing a basic installation/configuration, without registering the host via the Zabbix API to the server.

with-server

The 2nd scenario will boot 4 Docker containers with the following OS'es:

  • CentOS 7 (Zabbix Server)
  • Debian 8
  • CentOS 7
  • Ubuntu 18.04

First, a Zabbix Server will be installed on a container. This installation make uses of other dj-wasabi roles to install/configure a Zabbix Server. Once this instance is running, the 3 other agents are installed.

Each host will register itself on the Zabbix Server and the status should be 0 (This means the Zabbix Server and Zabbix Agent are connected).

The Ubuntu agent will register itself via a PSK, so that communication between the Zabbix Server and Zabbix Agent is encrypted with e Pre-Shared Key.

Deploying Userparameters

The following steps are required to install custom userparameters and/or scripts:

  • Put the desired userparameter file in the templates/userparameters directory and name it as <userparameter_name>.j2. For example: templates/userparameters/mysql.j2
  • Put the scripts directory (if any) in the files/scripts directory. For example: files/scripts/mysql
  • Add zabbix_agent_userparameters variable to the playbook as a list of dictionaries and define userparameter name and scripts directory name (if there are no scripts just no not specify the scripts_dir variable).

Example:

- hosts: mysql_servers
  tasks:
    - include_role:
        name: dj-wasabi.zabbix-agent
      vars:
        zabbix_agent_server: zabbix.mydomain.com
        zabbix_agent_userparameters:
          - name: mysql
            scripts_dir: mysql
          - name: galera

Example of the "templates/userparameters/mysql.j2" file:

UserParameter=mysql.ping_to,mysqladmin -uroot ping | grep -c alive

License

GPLv3

Author Information

Please send suggestion or pull requests to make this role better. Also let me know if you encounter any issues installing or using this role.

Github: https://github.com/dj-wasabi/ansible-zabbix-agent

mail: ikben [ at ] werner-dijkerman . nl