Register Linux hosts

You can register Linux hosts to collect system health and performance metrics.

Prerequisites for monitoring

The following prerequisites are necessary for monitoring Linux hosts:

• The Linux host that you want to register must be running a distribution and software version that is supported by ArcGIS Monitor.
• The Linux host that you want to register must have SSH enabled.
• The firewall must allow communication between the Linux host and the ArcGIS Monitor machine where it will be registered on port 22.

  Note:

  If the Linux host is configured to run SSH on a different port, communication must instead be allowed on that port.

• The user account that you use to register the Linux host must have SSH access.

Register Linux hosts for monitoring

You must be assigned the Administrator or Manager role to register components.

1. Access ArcGIS Monitor, if necessary.

   The Home page appears.

2. Click Monitoring.

   The Monitoring page appears with a list of components sorted alphabetically by component name.

3. Click Register component.

   The Register component wizard appears.

   Note:

   If you don't have sufficient privileges, Register component is not available.

4. Choose the ArcGIS Monitor Server or ArcGIS Monitor Agent machine that has network access to the component that you want to register and click Next.

   The Component type page appears.

5. Under Host, choose Linux and click Next.

   The Component details page appears.

6. Type a name for the component in the Component name text box.
7. Optionally, type a description for the component in the Description text box.
8. Optionally, click Apply Labels and choose the labels that you want to apply to the component.

   Tip:

   Type the name of a label in the Enter label name text box to search for a specific label. If the label that you want to add doesn't exist, type the name of the label that you want to create in the Enter label name text box and click Create new label to add the label and apply it to the component.

9. Click Next.

   The Connection page appears.

10. Type the fully qualified domain name or IP address of the host you want to register in the Address text box.
11. Provide the credentials for the host using one of the following methods:
    • Provide credentials in the Username and Password text boxes.
    • Provide a username in the Username text box, check the SSH key credentials check box, and provide a passphrase in the Passphrase text box if the SSH key file is encrypted.

      Note:

      When the SSH key credentials check box is checked, the credentials are imported from the ArcGIS Monitor account's SSH keys.

12. Click Register component.

    The component is added to the list of monitored components on the Monitoring page.

Once a component is registered, you can configure alert rules and add the component to collections.

Note:

Other software component types, such as ArcGIS software and databases, must be registered individually to enable monitoring.

Observers

The following table describes the observers that are responsible for collecting Linux host attribute and metric data:

Observer name	Description
Discover	The Discover observer scans for changes and manages attribute data across the Linux host. The default interval for this observer is 15 minutes; however, you can configure it to run at longer intervals since changes to the underlying site configuration are expected to be infrequent.
Metrics	The Metrics observer collects Linux host metric data. The default interval for this observer is 1 minute to retrieve data frequently. It is recommended that you do not run this observer at longer intervals.

Collected attributes

The subsections below describe the attributes that are collected for Linux hosts.

Host attributes

The following table lists the attributes that are collected for Linux hosts:

Attribute name	Description	Data type
Class	The instance type (virtual or physical)	String
CPU cores logical	The CPU's total number of logical cores	Integer
CPU cores physical	The CPU's total number of physical cores	Integer
CPU name	The CPU name and model information	String
CPU speed	The speed of the host's CPU	Float
Memory total	The host's total amount of memory (RAM)	Float
Network speed	The speed of the network	Integer
Started at	The date and time the host was last started	Datetime
UTC offset	The host's UTC time zone offset	Integer
Version	The software version of the operating system (OS)	String

Storage attributes

The following table lists the attributes collected for a host's storage resources:

Attribute name	Description	Data type
Storage total	The size of the volume	Float

Collected metrics

The subsections below describe the metrics that are collected for Linux hosts.

Host metrics

The following table lists the metrics collected for Linux hosts:

Metric name	Description	Data type	Unit
Connectivity - <Discover observer r_id>	The observer's ability to successfully connect to the component.	Float	Percent
Connectivity - <Metrics observer r_id>	The observer's ability to successfully connect to the component.	Float	Percent
CPU Cores Utilized	The number of logical CPU cores in use.	Float	Total
CPU Utilized	The proportion of CPU resources in use. Values approaching 100 percent may indicate that more resources are needed to handle the workload.	Float	Percent
Memory Available	The total amount of physical memory.	Float	Gigabytes
Memory Used	The amount of memory in use.	Float	Gigabytes
Memory Utilized	The proportion of memory in use. Values approaching 100 percent may indicate that more resources are needed to handle the workload.	Float	Percent
Network Incoming	The rate of network data received.	Float	Megabits/second
Network Incoming utilized	The proportion of incoming network bandwidth in use.	Float	Percent
Network Outgoing	The rate of network data sent.	Float	Megabits/second
Network Outgoing Utilized	The proportion of outgoing network bandwidth in use.	Float	Percent
Pagefile Available	The total pagefile or swap memory resources available.	Float	Gigabytes
Pagefile Used	The total pagefile or swap memory resources in use.	Float	Gigabytes
Pagefile Utilized	The proportion of pagefile or swap memory resources in use.	Float	Percent

Process metrics

Monitor collects information about the following processes:

• arcgisserver
• arcsoc
• arcgisportal
• geoeventserver
• python
• sqlserver
• postgres
• oracle

The following table lists the metrics collected for a Linux host's processes:

Metric name	Description	Data type	Unit
Process CPU Utilized	The proportion of CPU resources in use by the process. Values approaching 100 percent may indicate that more resources are needed to handle the workload.	Float	Percent
Process Instances	The total number of process instances that are running.	Float	Total
Process Memory Used	The amount of memory resources in use by the process.	Float	Gigabytes
Process Memory Utilized	The proportion of memory in use by the process. Values approaching 100 percent may indicate that more resources are needed to handle the workload.	Float	Percent

Storage metrics

The following table lists the metrics collected for a host's storage resources:

Metric name	Description	Data type	Unit
Storage Capacity Available	The amount of available storage space.	Float	Gigabytes
Storage Capacity Used	The amount of storage space in use.	Float	Gigabytes
Storage Capacity Utilized	The proportion of storage capacity in use.	Float	Percent
Storage Read Rate	The speed at which data is read from the disk.	Float	Gigabytes/second
Storage Write Rate	The speed at which data is written to the disk.	Float	Gigabytes/second

Default alert rules

The following table lists the default alert rules that are configured for Linux hosts:

Metric name	Aggregation	Operator	Info threshold	Warning threshold	Critical threshold	Samples
Connectivity - <Discover observer r_id>	Average	Is less than	—	—	100	2
Connectivity - <Metrics observer r_id>	Average	Is less than	—	—	100	2
CPU Utilized	Average	Is greater than	—	75	90	3
Memory Utilized	Average	Is greater than	—	75	90	3
Pagefile Utilized	Average	Is greater than	—	75	90	3
Process CPU Utilized	Average	Is greater than	—	75	90	3
Process Memory Utilized	Average	Is greater than	—	75	90	3
Storage Capacity Utilized	Average	Is greater than	—	75	90	3

Note:

The default alert rules in the table above are the rules that are configured for components when Monitor is first deployed. If your Monitor administrator has configured default alert rules for the Monitor deployment, the values for the rules above may vary.