Host Configuration Properties

Advanced

Display Name Description Related Name Default Value API Name Required
Cloudera Manager Agent Monitoring Advanced Configuration Snippet (Safety Valve) For advanced use only, key-value pairs (one on each line), that will be used by Clouder Manager Agent. host_agent_safety_valve false
Java Home Directory Explicitly set the value of JAVA_HOME for all processes. This will override the auto-detection logic that is normally used. java_home false

Monitoring

Display Name Description Related Name Default Value API Name Required
Enable Health Alerts for This Host When set, Cloudera Manager will send alerts when the health of this host reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold false enable_alerts false
Enable Configuration Change Alerts When set, Cloudera Manager will send alerts when this entity's configuration changes. false enable_config_alerts false
Cloudera Manager Agent Log Directory Free Space Monitoring Absolute Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's log directory. Warning: 2 GiB, Critical: 1 GiB host_agent_log_directory_free_space_absolute_thresholds false
Cloudera Manager Agent Log Directory Free Space Monitoring Percentage Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's log directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Cloudera Manager Agent Log Directory Free Space Monitoring Absolute Thresholds setting is configured. Warning: Never, Critical: Never host_agent_log_directory_free_space_percentage_thresholds false
Cloudera Manager Agent Parcel Directory Free Space Monitoring Absolute Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's parcel directory. Warning: 10 GiB, Critical: 5 GiB host_agent_parcel_directory_free_space_absolute_thresholds false
Cloudera Manager Agent Parcel Directory Free Space Monitoring Percentage Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's parcel directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Cloudera Manager Agent Parcel Directory Free Space Monitoring Absolute Thresholds setting is configured. Warning: Never, Critical: Never host_agent_parcel_directory_free_space_percentage_thresholds false
Cloudera Manager Agent Process Directory Free Space Monitoring Absolute Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's process directory. Warning: 200 MiB, Critical: 100 MiB host_agent_process_directory_free_space_absolute_thresholds false
Cloudera Manager Agent Process Directory Free Space Monitoring Percentage Thresholds The health check thresholds for monitoring of free space on the filesystem that contains the Cloudera Manager Agent's process directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Cloudera Manager Agent Process Directory Free Space Monitoring Absolute Thresholds setting is configured. Warning: Never, Critical: Never host_agent_process_directory_free_space_percentage_thresholds false
Host Clock Offset Thresholds The thresholds for the host clock offset health test. The test compares this threshold against the absolute value of the clock offset reported by the host's NTP service from the 'ntpdc -np' command. Setting both the warning and critical threshold values to never turns off collection of the clock offset by the Cloudera Manager Agent. If NTP is not in use, both threshold values should be set to never. Cloudera recommends using NTP for time synchronization of Hadoop clusters. Warning: 3 second(s), Critical: 10 second(s) host_clock_offset_thresholds false
Disk Device Collection Exclusion Regex The regular expression used to filter monitored disk devices and partitions. Disk device (for example, sda) and partition (for example, sda2) names that match this pattern will be excluded from metric collection. ^$ host_disk_collection_filter false
Host DNS Resolution Duration Thresholds The health check thresholds for the host DNS resolution duration. Warning: 1 second(s), Critical: Never host_dns_resolution_duration_thresholds false
Hostname and Canonical Name Health Check Whether the hostname and canonical names for this host are consistent when checked from a Java process. true host_dns_resolution_enabled false
Filesystem Collection Exclusion Regex The regular expression used to filter monitored filesystems. Mountpoints for filesystems (for example, /data/1) that match this pattern will be excluded from metric collection. ^$ host_fs_collection_filter false
Host Memory Swapping Thresholds The health check thresholds of the number of pages swapped out on the host in the last 15 minutes Warning: Any, Critical: Never host_memswap_thresholds false
Host Memory Swapping Check Window The amount of time over which the memory swapping test checks for pages swapped. 15 minute(s) host_memswap_window false
Host Network Frame Error Test Minimum Required Packets The minimum number of received packets that must be received within the test window for this test to return "Bad" health. If less that this number of packets is received during the test window, the health check will never return "Bad" health. 0 host_network_frame_errors_floor false
Host Network Frame Error Percentage Thresholds The health check thresholds for the percentage of received packets that are frame errors. Warning: Any, Critical: 0.5 % host_network_frame_errors_thresholds false
Host Network Frame Error Check Window The amount of time over which the host frame error checks for frame errors. 15 minute(s) host_network_frame_errors_window false
Network Interface Collection Exclusion Regex The regular expression used to filter monitored network interfaces. Network interfaces that match this pattern will be excluded from metric collection. ^lo$ host_network_interface_collection_filter false
Host's Network Interfaces Slow Link Modes Thresholds The thresholds for the health check of the number of network interfaces that appear to be operating at less than full speed. Warning: Any, Critical: Never host_network_interfaces_slow_mode_thresholds false
Network Interface Expected Duplex Mode The expected duplex mode for network interfaces. Full host_nic_expected_duplex_mode false
Network Interface Expected Link Speed The expected network interface link speed. 1000 host_nic_expected_speed false
Host Process Health Test Enables the health test that the host's process state is consistent with the role configuration true host_scm_health_enabled false
Host Triggers The configured triggers for this host. This is a JSON formatted list of triggers. These triggers are evaluated as part as the health system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed. Each trigger has all of the following fields:
  • triggerName (mandatory) - The name of the trigger. This value must be unique for the specific host.
  • triggerExpression (mandatory) - A tsquery expression representing the trigger.
  • streamThreshold (optional) - The maximum number of streams that can satisfy a condition of a trigger before the condition fires. By default set to 0, and any stream returned causes the condition to fire.
  • enabled (optional) - By default set to 'true'. If set to 'false', the trigger will not be evaluated.
  • expressionEditorConfig (optional) - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here may lead to inconsistencies.
For example, the following JSON formatted trigger fires if the host's wait time exceeds 500ms:[{"triggerName": "sample-trigger", "triggerExpression": "IF (select await_time where hostname=$HOSTNAME and last(await_time) > 500ms) DO health:concerning", "streamThreshold": 0, "enabled": "true"}]See the trigger rules documentation for more details on how to write triggers using tsquery.The JSON format is evolving and may change in the future and, as a result, backward compatibility is not guaranteed between releases at this time.		 [] host_triggers true

Other

Display Name Description Related Name Default Value API Name Required
Memory Overcommit Validation Threshold Threshold used when validating the allocation of RAM on a host. 0 means all of the memory is reserved for the system. 1 means none is reserved. Values can range from 0 to 1. 0.8 memory_overcommit_threshold false

Parcels

Display Name Description Related Name Default Value API Name Required
Parcel Directory The directory that parcels will be installed into on the host(s). The download 'parcel-cache' directory will be placed next to this directory on the filesystem. If the 'parcel_dir' variable is set in the Agent's config.ini file, it will override this value. /opt/cloudera/parcels parcels_directory true

Resource Management

Display Name Description Related Name Default Value API Name Required
Enable Cgroup-based Resource Management Enables resource management using control groups (cgroups). When toggled, roles on the host must be restarted for cgroups to be enabled or disabled. Per-resource controls are found in the configuration pages of role configuration groups and individual roles. Control groups are a feature of the Linux kernel, and support varies by distribution; see the Cloudera Manager documentation for details. false rm_enabled true