mirror of https://github.com/Icinga/icinga2.git
Enhance Agent best practices throughout the documentation
- Highlight the Icinga agent - Prefer SSH as fallback and add more detailed setup instructions - Improve SNMP and add traps right after - Explain nscp and wmi with URLs - Drop discouraged nrpe instructions (checks and PNP customizations) - Update Dependency examples with the Icinga Agent This sources from recent discussions on community.icinga.com and follows the updates with the distributed monitoring chapter for 2.11.
This commit is contained in:
Michael Friedrich
parent
59081c4f82
commit
2c4a1b2609
|
|
@ -2803,55 +2803,40 @@ will detect their reachability immediately when executing checks.
|
|||
|
||||
### Dependencies for Agent Checks <a id="dependencies-agent-checks"></a>
|
||||
|
||||
Another classic example are agent based checks. You would define a health check
|
||||
Another good example are agent based checks. You would define a health check
|
||||
for the agent daemon responding to your requests, and make all other services
|
||||
querying that daemon depend on that health check.
|
||||
|
||||
The following configuration defines two nrpe based service checks `nrpe-load`
|
||||
and `nrpe-disk` applied to the host `nrpe-server` [matched](18-library-reference.md#global-functions-match)
|
||||
by its name. The health check is defined as `nrpe-health` service.
|
||||
```
|
||||
apply Service "agent-health" {
|
||||
check_command = "cluster-zone"
|
||||
|
||||
display_name = "cluster-health-" + host.name
|
||||
|
||||
/* This follows the convention that the agent zone name is the FQDN which is the same as the host object name. */
|
||||
vars.cluster_zone = host.name
|
||||
|
||||
assign where host.vars.agent_endpoint
|
||||
}
|
||||
```
|
||||
|
||||
Now, make all other agent based checks dependent on the OK state of the `agent-health`
|
||||
service.
|
||||
|
||||
```
|
||||
apply Service "nrpe-health" {
|
||||
import "generic-service"
|
||||
check_command = "nrpe"
|
||||
assign where match("nrpe-*", host.name)
|
||||
}
|
||||
apply Dependency "agent-health-check" to Service {
|
||||
parent_service_name = "agent-health"
|
||||
|
||||
apply Service "nrpe-load" {
|
||||
import "generic-service"
|
||||
check_command = "nrpe"
|
||||
vars.nrpe_command = "check_load"
|
||||
assign where match("nrpe-*", host.name)
|
||||
}
|
||||
|
||||
apply Service "nrpe-disk" {
|
||||
import "generic-service"
|
||||
check_command = "nrpe"
|
||||
vars.nrpe_command = "check_disk"
|
||||
assign where match("nrpe-*", host.name)
|
||||
}
|
||||
|
||||
object Host "nrpe-server" {
|
||||
import "generic-host"
|
||||
address = "192.168.1.5"
|
||||
}
|
||||
|
||||
apply Dependency "disable-nrpe-checks" to Service {
|
||||
parent_service_name = "nrpe-health"
|
||||
|
||||
states = [ OK ]
|
||||
disable_checks = true
|
||||
states = [ OK ] // Fail if the parent service state switches to NOT-OK
|
||||
disable_notifications = true
|
||||
assign where service.check_command == "nrpe"
|
||||
ignore where service.name == "nrpe-health"
|
||||
|
||||
assign where host.vars.agent_endpoint // Automatically assigns all agent endpoint checks as child services on the matched host
|
||||
ignore where service.name == "agent-health" // Avoid a self reference from child to parent
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
The `disable-nrpe-checks` dependency is applied to all services
|
||||
on the `nrpe-service` host using the `nrpe` check_command attribute
|
||||
but not the `nrpe-health` service itself.
|
||||
|
||||
This is described in detail in [this chapter](06-distributed-monitoring.md#distributed-monitoring-health-checks).
|
||||
|
||||
### Event Commands <a id="event-commands"></a>
|
||||
|
||||
|
|
|
|||
|
|
@ -1,20 +1,198 @@
|
|||
# Additional Agent-based Checks <a id="agent-based-checks-addon"></a>
|
||||
# Agent-based Checks <a id="agent-based-checks-addon"></a>
|
||||
|
||||
If the remote services are not directly accessible through the network, a
|
||||
local agent installation exposing the results to check queries can
|
||||
become handy.
|
||||
|
||||
Prior to installing and configuration an agent service, evaluate possible
|
||||
options based on these requirements:
|
||||
|
||||
* Security (authentication, TLS certificates, secure connection handling, etc.)
|
||||
* Connection direction
|
||||
* Master/satellite can execute commands directly or
|
||||
* Agent sends back passive/external check results
|
||||
* Availability on specific OS types and versions
|
||||
* Packages available
|
||||
* Configuration and initial setup
|
||||
* Updates and maintenance, compatibility
|
||||
|
||||
Available agent types:
|
||||
|
||||
* [Icinga Agent](07-agent-based-monitoring.md#agent-based-checks-icinga) on Linux/Unix and Windows
|
||||
* [SSH](07-agent-based-monitoring.md#agent-based-checks-ssh) on Linux/Unix
|
||||
* [SNMP](07-agent-based-monitoring.md#agent-based-checks-snmp) on Linux/Unix and hardware
|
||||
* [SNMP Traps](07-agent-based-monitoring.md#agent-based-checks-snmp-traps) as passive check results
|
||||
* [REST API](07-agent-based-monitoring.md#agent-based-checks-rest-api) for passive external check results
|
||||
* [NSClient++](07-agent-based-monitoring.md#agent-based-checks-nsclient) and [WMI](07-agent-based-monitoring.md#agent-based-checks-wmi) on Windows
|
||||
|
||||
|
||||
## Icinga Agent <a id="agent-based-checks-icinga"></a>
|
||||
|
||||
For the most common setups on Linux/Unix and Windows, we recommend
|
||||
to setup the Icinga agent in a [distributed environment](06-distributed-monitoring.md#distributed-monitoring).
|
||||
|
||||
|
||||
|
||||
Key benefits:
|
||||
|
||||
* Directly integrated into the distributed monitoring stack of Icinga
|
||||
* Works on Linux/Unix and Windows
|
||||
* Secure communication with TLS
|
||||
* Connection can be established from both sides. Once connected, command execution and check results are exchanged.
|
||||
* Master/satellite connects to agent
|
||||
* Agent connects to parent satellite/master
|
||||
* Same configuration language and binaries
|
||||
* Troubleshooting docs and community best practices
|
||||
|
||||
Follow the setup and configuration instructions [here](06-distributed-monitoring.md#distributed-monitoring-setup-agent-satellite).
|
||||
|
||||
On Windows hosts, the Icinga agent can query a local NSClient++ service
|
||||
for additional checks in case there are no plugins available. The NSCP
|
||||
installer is bundled with Icinga and can be installed with the setup wizard.
|
||||
|
||||
|
||||
|
||||
## SSH <a id="agent-based-checks-ssh"></a>
|
||||
|
||||
> **Tip**
|
||||
>
|
||||
> This is the recommended way for systems where the Icinga agent is not available
|
||||
> Be it specific hardware architectures, old systems or forbidden to install an additional software.
|
||||
|
||||
This method uses the SSH service on the remote host to execute
|
||||
an arbitrary plugin command line. The output and exit code is
|
||||
returned and used by the core.
|
||||
|
||||
The `check_by_ssh` plugin takes care of this. It is available in the
|
||||
[Monitoring Plugins package](02-installation.md#setting-up-check-plugins).
|
||||
For your convenience, the Icinga template library provides the [by_ssh](10-icinga-template-library.md#plugin-check-command-by-ssh)
|
||||
CheckCommand already.
|
||||
|
||||
### SSH: Preparations <a id="agent-based-checks-ssh-preparations"></a>
|
||||
|
||||
SSH key pair for the Icinga daemon user. In case the user has no shell, temporarily enable this.
|
||||
When asked for a passphrase, **do not set it** and press enter.
|
||||
|
||||
```
|
||||
sudo su - icinga
|
||||
|
||||
ssh-keygen -b 4096 -t rsa -C "icinga@$(hostname) user for check_by_ssh" -f $HOME/.ssh/id_rsa
|
||||
```
|
||||
|
||||
On the remote agent, create the icinga user and generate a temporary password.
|
||||
|
||||
```
|
||||
useradd -m icinga
|
||||
passwd icinga
|
||||
```
|
||||
|
||||
Copy the public key from the Icinga server to the remote agent, e.g. with `ssh-copy-id`
|
||||
or manually into `/home/icinga/.ssh/authorized_keys`.
|
||||
This will ask for the password once.
|
||||
|
||||
```
|
||||
sudo su - icinga
|
||||
|
||||
ssh-copy-id -i $HOME/.ssh/id_rsa icinga@ssh-agent1.localdomain
|
||||
```
|
||||
|
||||
After the SSH key is copied, test at the connection **at least once** and
|
||||
accept the host key verification. If you forget about this step, checks will
|
||||
become UNKNOWN later.
|
||||
|
||||
```
|
||||
ssh -i $HOME/.ssh/id_rsa icinga@ssh-agent1.localdomain
|
||||
```
|
||||
|
||||
After the SSH key login works, disable the previously enabled logins.
|
||||
|
||||
* Remote agent user's password with `passwd -l icinga`
|
||||
* Local icinga user terminal
|
||||
|
||||
Also, ensure that the permissions are correct for the `.ssh` directory
|
||||
as otherwise logins will fail.
|
||||
|
||||
* `.ssh` directory: 700
|
||||
* `.ssh/id_rsa.pub` public key file: 644
|
||||
* `.ssh/id_rsa` private key file: 600
|
||||
|
||||
|
||||
### SSH: Configuration <a id="agent-based-checks-ssh-config"></a>
|
||||
|
||||
First, create a host object which has SSH configured and enabled.
|
||||
Mark this e.g. with the custom variable `agent_type` to later
|
||||
use this for service apply rule matches. Best practice is to
|
||||
store that in a specific template, either in the static configuration
|
||||
or inside the Director.
|
||||
|
||||
```
|
||||
template Host "ssh-agent" {
|
||||
check_command = "hostalive"
|
||||
|
||||
vars.agent_type = "ssh"
|
||||
vars.os_type = "linux"
|
||||
}
|
||||
|
||||
object Host "ssh-agent1.localdomain" {
|
||||
import "ssh-agent"
|
||||
|
||||
address = "192.168.56.115"
|
||||
}
|
||||
```
|
||||
|
||||
Example for monitoring the remote users:
|
||||
|
||||
```
|
||||
apply Service "users" {
|
||||
check_command = "by_ssh"
|
||||
|
||||
vars.by_ssh_command = [ "/usr/lib/nagios/plugins/check_users" ]
|
||||
|
||||
// Follows the same principle as with command arguments, e.g. for ordering
|
||||
vars.by_ssh_arguments = {
|
||||
"-w" = {
|
||||
value = "$users_wgreater$" // Can reference an existing custom variable defined on the host or service, evaluated at runtime
|
||||
}
|
||||
"-c" = {
|
||||
value = "$users_cgreater$"
|
||||
}
|
||||
}
|
||||
|
||||
vars.users_wgreater = 3
|
||||
vars.users_cgreater = 5
|
||||
|
||||
assign where host.vars.os_type == "linux" && host.vars.agent_type == "ssh"
|
||||
}
|
||||
```
|
||||
|
||||
A more advanced example with better arguments is shown in [this blogpost](https://www.netways.de/blog/2016/03/21/check_by_ssh-mit-icinga-2/).
|
||||
|
||||
|
||||
## SNMP <a id="agent-based-checks-snmp"></a>
|
||||
|
||||
The SNMP daemon runs on the remote system and answers SNMP queries by plugin
|
||||
binaries. The [Monitoring Plugins package](02-installation.md#setting-up-check-plugins) ships
|
||||
The SNMP daemon runs on the remote system and answers SNMP queries by plugin scripts.
|
||||
The [Monitoring Plugins package](02-installation.md#setting-up-check-plugins) provides
|
||||
the `check_snmp` plugin binary, but there are plenty of [existing plugins](05-service-monitoring.md#service-monitoring-plugins)
|
||||
for specific use cases already around, for example monitoring Cisco routers.
|
||||
|
||||
The following example uses the [SNMP ITL](10-icinga-template-library.md#plugin-check-command-snmp) `CheckCommand` and just
|
||||
overrides the `snmp_oid` custom variable. A service is created for all hosts which
|
||||
The following example uses the [SNMP ITL](10-icinga-template-library.md#plugin-check-command-snmp)
|
||||
CheckCommand and sets the `snmp_oid` custom variable. A service is created for all hosts which
|
||||
have the `snmp-community` custom variable.
|
||||
|
||||
```
|
||||
template Host "snmp-agent" {
|
||||
check_command = "hostalive"
|
||||
|
||||
vars.agent_type = "snmp"
|
||||
|
||||
vars.snmp_community = "public-icinga"
|
||||
}
|
||||
|
||||
object Host "snmp-agent1.localdomain" {
|
||||
import "snmp-agent"
|
||||
}
|
||||
```
|
||||
|
||||
```
|
||||
apply Service "uptime" {
|
||||
import "generic-service"
|
||||
|
|
@ -23,177 +201,21 @@ apply Service "uptime" {
|
|||
vars.snmp_oid = "1.3.6.1.2.1.1.3.0"
|
||||
vars.snmp_miblist = "DISMAN-EVENT-MIB"
|
||||
|
||||
assign where host.vars.snmp_community != ""
|
||||
assign where host.vars.agent_type == "snmp" && host.vars.snmp_community != ""
|
||||
}
|
||||
```
|
||||
|
||||
Additional SNMP plugins are available using the [Manubulon SNMP Plugins](10-icinga-template-library.md#snmp-manubulon-plugin-check-commands).
|
||||
|
||||
If no `snmp_miblist` is specified, the plugin will default to `ALL`. As the number of available MIB files
|
||||
on the system increases so will the load generated by this plugin if no `MIB` is specified.
|
||||
As such, it is recommended to always specify at least one `MIB`.
|
||||
|
||||
## SSH <a id="agent-based-checks-ssh"></a>
|
||||
Additional SNMP plugins are available using the [Manubulon SNMP Plugins](10-icinga-template-library.md#snmp-manubulon-plugin-check-commands).
|
||||
|
||||
Calling a plugin using the SSH protocol to execute a plugin on the remote server fetching
|
||||
its return code and output. The `by_ssh` command object is part of the built-in templates and
|
||||
requires the `check_by_ssh` check plugin which is available in the [Monitoring Plugins package](02-installation.md#setting-up-check-plugins).
|
||||
|
||||
```
|
||||
object CheckCommand "by_ssh_swap" {
|
||||
import "by_ssh"
|
||||
|
||||
vars.by_ssh_command = "/usr/lib/nagios/plugins/check_swap -w $by_ssh_swap_warn$ -c $by_ssh_swap_crit$"
|
||||
vars.by_ssh_swap_warn = "75%"
|
||||
vars.by_ssh_swap_crit = "50%"
|
||||
}
|
||||
|
||||
object Service "swap" {
|
||||
import "generic-service"
|
||||
|
||||
host_name = "remote-ssh-host"
|
||||
|
||||
check_command = "by_ssh_swap"
|
||||
|
||||
vars.by_ssh_logname = "icinga"
|
||||
}
|
||||
```
|
||||
|
||||
## NSClient++ <a id="agent-based-checks-nsclient"></a>
|
||||
|
||||
[NSClient++](https://nsclient.org/) works on both Windows and Linux platforms and is well
|
||||
known for its magnificent Windows support. There are alternatives like the WMI interface,
|
||||
but using `NSClient++` will allow you to run local scripts similar to check plugins fetching
|
||||
the required output and performance counters.
|
||||
|
||||
You can use the `check_nt` plugin from the Monitoring Plugins project to query NSClient++.
|
||||
Icinga 2 provides the [nscp check command](10-icinga-template-library.md#plugin-check-command-nscp) for this:
|
||||
|
||||
Example:
|
||||
|
||||
```
|
||||
object Service "disk" {
|
||||
import "generic-service"
|
||||
|
||||
host_name = "remote-windows-host"
|
||||
|
||||
check_command = "nscp"
|
||||
|
||||
vars.nscp_variable = "USEDDISKSPACE"
|
||||
vars.nscp_params = "c"
|
||||
vars.nscp_warn = 70
|
||||
vars.nscp_crit = 80
|
||||
}
|
||||
```
|
||||
|
||||
For details on the `NSClient++` configuration please refer to the [official documentation](https://docs.nsclient.org/).
|
||||
|
||||
## NSCA-NG <a id="agent-based-checks-nsca-ng"></a>
|
||||
|
||||
[NSCA-ng](http://www.nsca-ng.org) provides a client-server pair that allows the
|
||||
remote sender to push check results into the Icinga 2 `ExternalCommandListener`
|
||||
feature.
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> This addon works in a similar fashion like the Icinga 1.x distributed model. If you
|
||||
> are looking for a real distributed architecture with Icinga 2, scroll down.
|
||||
|
||||
## NRPE <a id="agent-based-checks-nrpe"></a>
|
||||
|
||||
[NRPE](https://docs.icinga.com/latest/en/nrpe.html) runs as daemon on the remote client including
|
||||
the required plugins and command definitions.
|
||||
Icinga 2 calls the `check_nrpe` plugin binary in order to query the configured command on the
|
||||
remote client.
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> The NRPE protocol is considered insecure and has multiple flaws in its
|
||||
> design. Upstream is not willing to fix these issues.
|
||||
>
|
||||
> In order to stay safe, please use the native [Icinga 2 client](06-distributed-monitoring.md#distributed-monitoring)
|
||||
> instead.
|
||||
|
||||
The NRPE daemon uses its own configuration format in nrpe.cfg while `check_nrpe`
|
||||
can be embedded into the Icinga 2 `CheckCommand` configuration syntax.
|
||||
|
||||
You can use the `check_nrpe` plugin from the NRPE project to query the NRPE daemon.
|
||||
Icinga 2 provides the [nrpe check command](10-icinga-template-library.md#plugin-check-command-nrpe) for this:
|
||||
|
||||
Example:
|
||||
|
||||
```
|
||||
object Service "users" {
|
||||
import "generic-service"
|
||||
|
||||
host_name = "remote-nrpe-host"
|
||||
|
||||
check_command = "nrpe"
|
||||
vars.nrpe_command = "check_users"
|
||||
}
|
||||
```
|
||||
|
||||
nrpe.cfg:
|
||||
|
||||
```
|
||||
command[check_users]=/usr/local/icinga/libexec/check_users -w 5 -c 10
|
||||
```
|
||||
|
||||
If you are planning to pass arguments to NRPE using the `-a`
|
||||
command line parameter, make sure that your NRPE daemon has them
|
||||
supported and enabled.
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> Enabling command arguments in NRPE is considered harmful
|
||||
> and exposes a security risk allowing attackers to execute
|
||||
> commands remotely. Details at [seclists.org](http://seclists.org/fulldisclosure/2014/Apr/240).
|
||||
|
||||
The plugin check command `nrpe` provides the `nrpe_arguments` custom
|
||||
attribute which expects either a single value or an array of values.
|
||||
|
||||
Example:
|
||||
|
||||
```
|
||||
object Service "nrpe-disk-/" {
|
||||
import "generic-service"
|
||||
|
||||
host_name = "remote-nrpe-host"
|
||||
|
||||
check_command = "nrpe"
|
||||
vars.nrpe_command = "check_disk"
|
||||
vars.nrpe_arguments = [ "20%", "10%", "/" ]
|
||||
}
|
||||
```
|
||||
|
||||
Icinga 2 will execute the nrpe plugin like this:
|
||||
|
||||
```
|
||||
/usr/lib/nagios/plugins/check_nrpe -H <remote-nrpe-host> -c 'check_disk' -a '20%' '10%' '/'
|
||||
```
|
||||
|
||||
NRPE expects all additional arguments in an ordered fashion
|
||||
and interprets the first value as `$ARG1$` macro, the second
|
||||
value as `$ARG2$`, and so on.
|
||||
|
||||
nrpe.cfg:
|
||||
|
||||
```
|
||||
command[check_disk]=/usr/local/icinga/libexec/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
|
||||
```
|
||||
|
||||
Using the above example with `nrpe_arguments` the command
|
||||
executed by the NRPE daemon looks similar to that:
|
||||
|
||||
```
|
||||
/usr/local/icinga/libexec/check_disk -w 20% -c 10% -p /
|
||||
```
|
||||
|
||||
You can pass arguments in a similar manner to [NSClient++](07-agent-based-monitoring.md#agent-based-checks-nsclient)
|
||||
when using its NRPE supported check method.
|
||||
For network monitoring, community members advise to use [nwc_health](05-service-monitoring.md#service-monitoring-network)
|
||||
for example.
|
||||
|
||||
|
||||
## Passive Check Results and SNMP Traps <a id="agent-based-checks-snmp-traps"></a>
|
||||
## SNMP Traps and Passive Check Results <a id="agent-based-checks-snmp-traps"></a>
|
||||
|
||||
SNMP Traps can be received and filtered by using [SNMPTT](http://snmptt.sourceforge.net/)
|
||||
and specific trap handlers passing the check results to Icinga 2.
|
||||
|
|
@ -228,6 +250,11 @@ applied to your _n_ hosts. The host address inferred by SNMPTT will be the
|
|||
correlating factor. You can have snmptt provide host names or ip addresses to
|
||||
match your Icinga convention.
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> Replace the deprecated command pipe EXEC statement with a curl call
|
||||
> to the REST API action [process-check-result](12-icinga2-api.md#icinga2-api-actions-process-check-result).
|
||||
|
||||
Add an `EventCommand` configuration object for the passive service auto reset event.
|
||||
|
||||
```
|
||||
|
|
@ -311,6 +338,11 @@ if [ "$SERVICE_STATE_ID" -gt 0 ]; then
|
|||
fi
|
||||
```
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> Replace the deprecated command pipe EXEC statement with a curl call
|
||||
> to the REST API action [process-check-result](12-icinga2-api.md#icinga2-api-actions-process-check-result).
|
||||
|
||||
Finally create the `Service` and assign it:
|
||||
|
||||
```
|
||||
|
|
@ -361,6 +393,11 @@ EDESC
|
|||
2. The service name, state and text are extracted from the first three varbinds.
|
||||
This has the advantage of accommodating an unlimited set of use cases.
|
||||
|
||||
> **Note**
|
||||
>
|
||||
> Replace the deprecated command pipe EXEC statement with a curl call
|
||||
> to the REST API action [process-check-result](12-icinga2-api.md#icinga2-api-actions-process-check-result).
|
||||
|
||||
Create a `Service` for the specific use case associated to the host. If the host
|
||||
matches and the first varbind value is `Backup`, SNMPTT will submit the corresponding
|
||||
passive update with the state and text from the second and third varbind:
|
||||
|
|
@ -386,3 +423,65 @@ object Service "Backup" {
|
|||
vars.dummy_text = "No passive check result received."
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
## Agents sending Check Results via REST API <a id="agent-based-checks-rest-api"></a>
|
||||
|
||||
Whenever the remote agent cannot run the Icinga agent, or a backup script
|
||||
should just send its current state after finishing, you can use the [REST API](12-icinga2-api.md#icinga2-api)
|
||||
as secure transport and send [passive external check results](08-advanced-topics.md#external-check-results).
|
||||
|
||||
Use the [process-check-result](12-icinga2-api.md#icinga2-api-actions-process-check-result) API action to send the external passive check result.
|
||||
You can either use `curl` or implement the HTTP requests in your preferred programming
|
||||
language. Examples for API clients are available in [this chapter](12-icinga2-api.md#icinga2-api-clients).
|
||||
|
||||
Feeding check results from remote hosts requires the host/service
|
||||
objects configured on the master/satellite instance.
|
||||
|
||||
## NSClient++ on Windows <a id="agent-based-checks-nsclient"></a>
|
||||
|
||||
[NSClient++](https://nsclient.org/) works on both Windows and Linux platforms and is well
|
||||
known for its magnificent Windows support. There are alternatives like the WMI interface,
|
||||
but using `NSClient++` will allow you to run local scripts similar to check plugins fetching
|
||||
the required output and performance counters.
|
||||
|
||||
> **Tip**
|
||||
>
|
||||
> Best practice is to use the Icinga agent as secure execution
|
||||
> bridge (`check_nt` and `check_nrpe` are considered insecure)
|
||||
> and query the NSClient++ service [locally](06-distributed-monitoring.md#distributed-monitoring-windows-nscp).
|
||||
|
||||
You can use the `check_nt` plugin from the Monitoring Plugins project to query NSClient++.
|
||||
Icinga 2 provides the [nscp check command](10-icinga-template-library.md#plugin-check-command-nscp) for this:
|
||||
|
||||
Example:
|
||||
|
||||
```
|
||||
object Service "disk" {
|
||||
import "generic-service"
|
||||
|
||||
host_name = "remote-windows-host"
|
||||
|
||||
check_command = "nscp"
|
||||
|
||||
vars.nscp_variable = "USEDDISKSPACE"
|
||||
vars.nscp_params = "c"
|
||||
vars.nscp_warn = 70
|
||||
vars.nscp_crit = 80
|
||||
}
|
||||
```
|
||||
|
||||
For details on the `NSClient++` configuration please refer to the [official documentation](https://docs.nsclient.org/).
|
||||
|
||||
## WMI on Windows <a id="agent-based-checks-wmi"></a>
|
||||
|
||||
The most popular plugin is [check_wmi_plus](http://edcint.co.nz/checkwmiplus/).
|
||||
|
||||
> Check WMI Plus uses the Windows Management Interface (WMI) to check for common services (cpu, disk, sevices, eventlog…) on Windows machines. It requires the open source wmi client for Linux.
|
||||
|
||||
Community examples:
|
||||
|
||||
* [Icinga 2 check_wmi_plus example by 18pct](http://18pct.com/icinga2-check_wmi_plus-example/)
|
||||
* [Agent-less monitoring with WMI](https://www.devlink.de/linux/icinga2-nagios-agentless-monitoring-von-windows/)
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -376,7 +376,7 @@ object TimePeriod "prod-notification" {
|
|||
}
|
||||
```
|
||||
|
||||
## External Check Results <a id="external-check-results"></a>
|
||||
## External Passive Check Results <a id="external-check-results"></a>
|
||||
|
||||
Hosts or services which do not actively execute a check plugin to receive
|
||||
the state and output are called "passive checks" or "external check results".
|
||||
|
|
|
|||
|
|
@ -80,10 +80,6 @@ Set `perfdata_spool_dir = /var/spool/icinga2/perfdata` and restart the `npcd` da
|
|||
There's also an Icinga Web 2 module for direct PNP graph integration
|
||||
available at [Icinga Exchange](https://exchange.icinga.com/icinga/PNP).
|
||||
|
||||
More information on [action_url as attribute](13-addons.md#addons-graphing-pnp-action-url)
|
||||
and [graph template names](13-addons.md#addons-graphing-pnp-custom-templates).
|
||||
|
||||
|
||||
## Visualization <a id="addons-visualization"></a>
|
||||
|
||||
### Maps <a id="addons-visualization-maps"></a>
|
||||
|
|
@ -210,43 +206,3 @@ template Service "pnp-svc" {
|
|||
}
|
||||
```
|
||||
|
||||
### PNP Custom Templates with Icinga 2 <a id="addons-graphing-pnp-custom-templates"></a>
|
||||
|
||||
PNP automatically determines the graph template from the check command name (or the argument's name).
|
||||
This behavior changed in Icinga 2 compared to Icinga 1.x. Though there are certain possibilities to
|
||||
fix this:
|
||||
|
||||
* Create a symlink for example from the `templates.dist/check_ping.php` template to the actual check name in Icinga 2 (`templates/ping4.php`)
|
||||
* Pass the check command name inside the [format template configuration](14-features.md#writing-performance-data-files)
|
||||
|
||||
The latter becomes difficult with agent based checks like NRPE or SSH where the first command argument acts as
|
||||
graph template identifier. There is the possibility to define the pnp template name as custom variable
|
||||
and use that inside the formatting templates as `SERVICECHECKCOMMAND` for instance.
|
||||
|
||||
Example for services:
|
||||
|
||||
```
|
||||
# vim /etc/icinga2/features-enabled/perfdata.conf
|
||||
|
||||
service_format_template = "DATATYPE::SERVICEPERFDATA\tTIMET::$icinga.timet$\tHOSTNAME::$host.name$\tSERVICEDESC::$service.name$\tSERVICEPERFDATA::$service.perfdata$\tSERVICECHECKCOMMAND::$service.check_command$$pnp_check_arg1$\tHOSTSTATE::$host.state$\tHOSTSTATETYPE::$host.state_type$\tSERVICESTATE::$service.state$\tSERVICESTATETYPE::$service.state_type$"
|
||||
|
||||
# vim /etc/icinga2/conf.d/services.conf
|
||||
|
||||
template Service "pnp-svc" {
|
||||
action_url = "/pnp4nagios/graph?host=$HOSTNAME$&srv=$SERVICEDESC$"
|
||||
vars.pnp_check_arg1 = ""
|
||||
}
|
||||
|
||||
apply Service "nrpe-check" {
|
||||
import "pnp-svc"
|
||||
check_command = nrpe
|
||||
vars.nrpe_command = "check_disk"
|
||||
|
||||
vars.pnp_check_arg1 = "!$nrpe_command$"
|
||||
}
|
||||
```
|
||||
|
||||
If there are warnings about unresolved macros, make sure to specify a default value for `vars.pnp_check_arg1` inside the
|
||||
|
||||
In PNP, the custom template for nrpe is then defined in `/etc/pnp4nagios/custom/nrpe.cfg`
|
||||
and the additional command arg string will be seen in the xml too for other templates.
|
||||
|
|
|
|||
Loading…
Reference in New Issue