Documentation
3 Agente Zabbix (UNIX)
Overview
This section lists parameters supported in a Zabbix agent configuration file (zabbix_agentd.conf). Note that:
- The default values reflect daemon defaults, not the values in the shipped configuration files;
- Zabbix supports configuration files only in UTF-8 encoding without BOM;
- Comments starting with "#" are only supported in the beginning of the line.
Dettagli dei parametri
Alias
Sets an alias for an item key. It can be used to substitute a long and complex item key with a shorter and simpler one. Multiple Alias parameters with the same Alias key may be present.
Different Alias keys may reference the same item key.
Aliases can be used in HostMetadataItem but not in HostnameItem parameters.
Example 1: Retrieving the ID of user 'zabbix'.
Now the zabbix.userid shorthand key may be used to retrieve data.
Example 2: Getting CPU utilization with default and custom parameters.
This allows use the cpu.util key to get CPU utilization percentage with default parameters as well as use cpu.util[all, idle, avg15] to get specific data about CPU utilization.
Example 3: Running multiple low-level discovery rules processing the same discovery items.
Now it is possible to set up several discovery rules using vfs.fs.discovery with different parameters for each rule, e.g., vfs.fs.discovery[foo], vfs.fs.discovery[bar], etc.
AllowKey
Allow execution of those item keys that match a pattern. The key pattern is a wildcard expression that supports the "*" character to match any number of any characters.
Multiple key matching rules may be defined in combination with DenyKey. The parameters are processed one by one according to their appearance order. See also: Restricting agent checks.
AllowRoot
Allow the agent to run as 'root'. If disabled and the agent is started by 'root', the agent will try to switch to user 'zabbix' instead. Has no effect if started under a regular user.
Default: 0 | Values: 0 - do not allow; 1 - allow
BufferSend
Do not keep data longer than N seconds in buffer.
Default: 5 | Range: 1-3600
BufferSize
The maximum number of values in the memory buffer. The agent will send all collected data to the Zabbix server or proxy if the buffer is full.
Default: 100 | Range: 2-65535
DebugLevel
Specify the debug level:
0 - basic information about starting and stopping of Zabbix processes
1 - critical information;
2 - error information;
3 - warnings;
4 - for debugging (produces lots of information);
5 - extended debugging (produces even more information).
Default: 3 | Range: 0-5
DenyKey
Deny execution of those item keys that match a pattern. The key pattern is a wildcard expression that supports the "*" character to match any number of any characters.
Multiple key matching rules may be defined in combination with AllowKey. The parameters are processed one by one according to their appearance order. See also: Restricting agent checks.
EnableRemoteCommands
Whether remote commands from Zabbix server are allowed. This parameter is deprecated, use AllowKey=system.run[*] or DenyKey=system.run[*] instead.
It is an internal alias for AllowKey/DenyKey parameters depending on value:
0 - DenyKey=system.run[*]
1 - AllowKey=system.run[*]
Default: 0 | Values: 0 - do not allow, 1 - allow
HeartbeatFrequency
The frequency of heartbeat messages in seconds. Used for monitoring the availability of active checks.
0 - heartbeat messages disabled.
Default: 60 | Range: 0-3600
HostInterface
An optional parameter that defines the host interface. The host interface is used at host autoregistration process. If not defined, the value will be acquired from HostInterfaceItem.
The agent will issue an error and not start if the value is over the limit of 255 characters.
Range: 0-255 characters
HostInterfaceItem
An optional parameter that defines an item used for getting the host interface.
Host interface is used at host autoregistration process.
During an autoregistration request the agent will log a warning message if the value returned by the specified item is over the limit of 255 characters.
This option is only used when HostInterface is not defined.
HostMetadata
An optional parameter that defines host metadata. Host metadata is used only at host autoregistration process (active agent). If not defined, the value will be acquired from HostMetadataItem.
The agent will issue an error and not start if the specified value is over the limit of 2034 bytes or a non-UTF-8 string.
Range: 0-2034 bytes
HostMetadataItem
An optional parameter that defines a Zabbix agent item used for getting host metadata. This option is only used when HostMetadata is not defined.User parameters and aliases are supported. The system.run[] item is supported regardless of AllowKey/DenyKey values.
The HostMetadataItem value is retrieved on each autoregistration attempt and is used only at host autoregistration process (active agent).
During an autoregistration request the agent will log a warning message if the value returned by the specified item is over the limit of 65535 UTF-8 code points. The value returned by the item must be a UTF-8 string otherwise it will be ignored.
Hostname
A list of comma-delimited, unique, case-sensitive hostnames. Required for active checks and must match hostnames as configured on the server. The value is acquired from HostnameItem if undefined.
Allowed characters: alphanumeric, '.', ' ', '_' and '-'. Maximum length: 128 characters per hostname, 2048 characters for the entire line.
Default: Set by HostnameItem
HostnameItem
An optional parameter that defines a Zabbix agent item used for getting the host name. This option is only used when Hostname is not defined. User parameters or aliases are not supported, but the system.run[] item is supported regardless of AllowKey/DenyKey values.
The output length is limited to 512KB.
Default: system.hostname
Include
You may include individual files or all files in a directory in the configuration file. To only include relevant files in the specified directory, the asterisk wildcard character is supported for pattern matching.
See special notes about limitations.
Example:
ListenBacklog
The maximum number of pending connections in the TCP queue.
The default value is a hard-coded constant, which depends on the system.
The maximum supported value depends on the system, too high values may be silently truncated to the 'implementation-specified maximum'.
Default: SOMAXCONN | Range: 0 - INT_MAX
ListenIP
A list of comma-delimited IP addresses that the agent should listen on.
Default: 0.0.0.0
ListenPort
The agent will listen on this port for connections from the server.
Default: 10050 | Range: 1024-32767
LoadModule
The module to load at agent startup. Modules are used to extend the functionality of the agent. The module must be located in the directory specified by LoadModulePath or the path must precede the module name. If the preceding path is absolute (starts with '/') then LoadModulePath is ignored.
Formats:
LoadModule=<module.so>
LoadModule=<path/module.so>
LoadModule=</abs_path/module.so>
It is allowed to include multiple LoadModule parameters.
LoadModulePath
Full path to the location of agent modules. The default depends on compilation options.
LogFile
Name of the log file.
Mandatory: Yes, if LogType is set to file; otherwise no
LogFileSize
The maximum size of a log file in MB.
0 - disable automatic log rotation.
Note: If the log file size limit is reached and file rotation fails, for whatever reason, the existing log file is truncated and started anew.
Default: 1 | Range: 0-1024
LogRemoteCommands
Enable logging of the executed shell commands as warnings. Commands will be logged only if executed remotely. Log entries will not be created if system.run[] is launched locally by HostMetadataItem, HostInterfaceItem or HostnameItem parameters.
Default: 0 | Values: 0 - disabled, 1 - enabled
LogType
Type of the log output:
file - write log to the file specified by LogFile parameter;
system - write log to syslog;
console - write log to standard output.
Default: file
MaxLinesPerSecond
The maximum number of new lines the agent will send per second to Zabbix server or proxy when processing 'log' and 'logrt' active checks. The provided value will be overridden by the 'maxlines' parameter, provided in the 'log' or 'logrt' item key.
Note: Zabbix will process 10 times more new lines than set in MaxLinesPerSecond to seek the required string in log items.
Default: 20 | Range: 1-1000
PidFile
Name of the PID file.
Default: /tmp/zabbix\_agentd.pid
RefreshActiveChecks
How often the list of active checks is refreshed, in seconds. Note that after failing to refresh active checks the next refresh will be attempted in 60 seconds.
Default: 5 | Range: 1-86400
Server
A list of comma-delimited IP addresses, optionally in CIDR notation, or hostnames of Zabbix servers and Zabbix proxies. Incoming connections will be accepted only from the hosts listed here. If IPv6 support is enabled then '127.0.0.1', '::127.0.0.1', '::ffff:127.0.0.1' are treated equally and '::/0' will allow any IPv4 or IPv6 address. '0.0.0.0/0' can be used to allow any IPv4 address. Note, that "IPv4-compatible IPv6 addresses" (0000::/96 prefix) are supported but deprecated by RFC4291. Spaces are allowed.
Example:
Mandatory: yes, if StartAgents is not explicitly set to 0
ServerActive
Zabbix server/proxy address or cluster configuration to get active checks from. The server/proxy address is an IP address or DNS name and optional port separated by colon.
Cluster configuration is one or more server addresses separated by semicolon. Multiple Zabbix servers/clusters and Zabbix proxies can be specified, separated by comma. More than one Zabbix proxy should not be specified from each Zabbix server/cluster. If Zabbix proxy is specified then Zabbix server/cluster for that proxy should not be specified.
Multiple comma-delimited addresses can be provided to use several independent Zabbix servers in parallel. Spaces are allowed.
If the port is not specified, default port is used.
IPv6 addresses must be enclosed in square brackets if port for that host is specified. If port is not specified, square brackets for IPv6 addresses are optional.
If this parameter is not specified, active checks are disabled.
Example for Zabbix proxy:
Example for multiple servers:
Example for high availability:
Example for high availability with two clusters and one server:
ServerActive=zabbix.cluster.node1;zabbix.cluster.node2:20051,zabbix.cluster2.node1;zabbix.cluster2.node2,zabbix.domainSourceIP
The source IP address for:
- outgoing connections to Zabbix server or Zabbix proxy;
- making connections while executing some items (web.page.get, net.tcp.port, etc.).
StartAgents
The number of pre-forked instances of zabbix_agentd that process passive checks. If set to 0, passive checks are disabled and the agent will not listen on any TCP port.
Default: 3 | Range: 0-100
Timeout
Spend no more than Timeout seconds on processing.
Default: 3 | Range: 1-30
TLSAccept
What incoming connections to accept. Used for a passive checks. Multiple values can be specified, separated by comma:
unencrypted - accept connections without encryption (default)
psk - accept connections with TLS and a pre-shared key (PSK)
cert - accept connections with TLS and a certificate
Mandatory: yes, if TLS certificate or PSK parameters are defined (even for unencrypted connection); otherwise no
TLSCAFile
The full pathname of the file containing the top-level CA(s) certificates for peer certificate verification, used for encrypted communications between Zabbix components.
TLSCertFile
The full pathname of the file containing the agent certificate or certificate chain, used for encrypted communications with Zabbix components.
TLSCipherAll
GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.
Example:
TLSCipherAll13
Cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.
Example for GnuTLS:
NONE:+VERS-TLS1.2:+ECDHE-RSA:+RSA:+ECDHE-PSK:+PSK:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL::+SIGN-ALL:+CTYPE-X.509Example for OpenSSL:
TLSCipherCert
GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for certificate-based encryption.
Example for GnuTLS:
NONE:+VERS-TLS1.2:+ECDHE-RSA:+RSA:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL:+SIGN-ALL:+CTYPE-X.509Example for OpenSSL:
TLSCipherCert13
Cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for certificate-based encryption.
TLSCipherPSK
GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for PSK-based encryption.
Example for GnuTLS:
NONE:+VERS-TLS1.2:+ECDHE-PSK:+PSK:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL:+SIGN-ALLExample for OpenSSL:
TLSCipherPSK13
Cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for PSK-based encryption.
Example:
TLSConnect
How the agent should connect to Zabbix server or proxy. Used for active checks. Only one value can be specified:
unencrypted - connect without encryption (default)
psk - connect using TLS and a pre-shared key (PSK)
cert - connect using TLS and a certificate
Mandatory: yes, if TLS certificate or PSK parameters are defined (even for unencrypted connection); otherwise no
TLSCRLFile
The full pathname of the file containing revoked certificates. This parameter is used for encrypted communications between Zabbix components.
TLSKeyFile
The full pathname of the file containing the agent private key, used for encrypted communications between Zabbix components.
TLSPSKFile
The full pathname of the file containing the agent pre-shared key, used for encrypted communications with Zabbix server.
TLSPSKIdentity
The pre-shared key identity string, used for encrypted communications with Zabbix server.
TLSServerCertIssuer
The allowed server (proxy) certificate issuer.
TLSServerCertSubject
The allowed server (proxy) certificate subject.
UnsafeUserParameters
Allow all characters to be passed in arguments to user-defined parameters. The following characters are not allowed: \ ' " ` * ? [ ] { } ~ $ ! & ; ( ) < > | # @
Additionally, newline characters are not allowed.
Default: 0 | Values: 0 - do not allow, 1 - allow
User
Drop privileges to a specific, existing user on the system.
Only has effect if run as 'root' and AllowRoot is disabled.
Default: zabbix
UserParameter
A user-defined parameter to monitor. There can be several user-defined parameters.
Format: UserParameter=<key>,<shell command>
Note that the shell command must not return empty string or EOL only. Shell commands may have relative paths, if the UserParameterDir parameter is specified.
Example:
UserParameterDir
The default search path for UserParameter commands. If used, the agent will change its working directory to the one specified here before executing a command. Thereby, UserParameter commands can have a relative ./ prefix instead of a full path.
Only one entry is allowed.
Example: