Chapter 5. collectd plugins

You can configure multiple collectd plugins depending on your Red Hat OpenStack Platform (RHOSP) 16.2 environment.

The following list of plugins shows the available heat template ExtraConfig parameters that you can set to override the default values. Each section provides the general configuration name for the ExtraConfig option. For example, if there is a collectd plugin called example_plugin, the format of the plugin title is collectd::plugin::example_plugin.

Reference the tables of available parameters for specific plugins, such as in the following example:

ExtraConfig:
  collectd::plugin::example_plugin::<parameter>: <value>

Reference the metrics tables of specific plugins for Prometheus or Grafana queries.

collectd::plugin::aggregation

You can aggregate several values into one with the aggregation plugin. Use the aggregation functions such as sum, average, min, and max to calculate metrics, for example average and total CPU statistics.

Table 5.1. aggregation parameters
Parameter	Type
host	String
plugin	String
plugininstance	Integer
agg_type	String
typeinstance	String
sethost	String
setplugin	String
setplugininstance	Integer
settypeinstance	String
groupby	Array of Strings
calculatesum	Boolean
calculatenum	Boolean
calculateaverage	Boolean
calculateminimum	Boolean
calculatemaximum	Boolean
calculatestddev	Boolean

Example configuration:

Deploy three aggregate configurations to create the following files:

aggregator-calcCpuLoadAvg.conf: average CPU load for all CPU cores grouped by host and state
aggregator-calcCpuLoadMinMax.conf: minimum and maximum CPU load groups by host and state
aggregator-calcMemoryTotalMaxAvg.conf: maximum, average, and total for memory grouped by type

The aggregation configurations use the default cpu and memory plugin configurations.

parameter_defaults:
  CollectdExtraPlugins:
    - aggregation

  ExtraConfig:
    collectd::plugin::aggregation::aggregators:
      calcCpuLoadAvg:
        plugin: "cpu"
        agg_type: "cpu"
        groupby:
          - "Host"
          - "TypeInstance"
        calculateaverage: True
      calcCpuLoadMinMax:
        plugin: "cpu"
        agg_type: "cpu"
        groupby:
          - "Host"
          - "TypeInstance"
        calculatemaximum: True
        calculateminimum: True
      calcMemoryTotalMaxAvg:
        plugin: "memory"
        agg_type: "memory"
        groupby:
          - "TypeInstance"
        calculatemaximum: True
        calculateaverage: True
        calculatesum: True

collectd::plugin::amqp1

Use the amqp1 plugin to write values to an amqp1 message bus, for example, AMQ Interconnect.

Table 5.2. amqp1 parameters
Parameter	Type
manage_package	Boolean
transport	String
host	String
port	Integer
user	String
password	String
address	String
instances	Hash
retry_delay	Integer
send_queue_limit	Integer
interval	Integer

Use the send_queue_limit parameter to limit the length of the outgoing metrics queue.

Note

If there is no AMQP1 connection, the plugin continues to queue messages to send, which can result in unbounded memory consumption. The default value is 0, which disables the outgoing metrics queue.

Increase the value of the send_queue_limit parameter if metrics are missing.

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
    - amqp1

  ExtraConfig:
    collectd::plugin::amqp1::send_queue_limit: 5000

collectd::plugin::apache

Use the apache plugin to collect Apache data from the mod_status plugin that is provided by the Apache web server. Each instance provided has a per-interval value specified in seconds. If you provide the timeout interval parameter for an instance, the value is in milliseconds.

Table 5.3. apache parameters
Parameter	Type
instances	Hash
interval	Integer
manage-package	Boolean
package_install_options	List

Table 5.4. apache instances parameters
Parameter	Type
url	HTTP URL
user	String
password	String
verifypeer	Boolean
verifyhost	Boolean
cacert	AbsolutePath
sslciphers	String
timeout	Integer

Example configuration:

In this example, the instance name is localhost, which connects to the Apache web server at http://10.0.0.111/mod_status?auto. You must append ?auto to the end of the URL to prevent the status page returning as a type that is incompatible with the plugin.

parameter_defaults:
  CollectdExtraPlugins:
  - apache

  ExtraConfig:
    collectd::plugin::apache::instances:
      localhost:
        url: "http://10.0.0.111/mod_status?auto"

Additional resources

For more information about configuring the apache plugin, see apache.

collectd::plugin::battery

Use the battery plugin to report the remaining capacity, power, or voltage of laptop batteries.

Table 5.5. battery parameters
Parameter	Type
values_percentage	Boolean
report_degraded	Boolean
query_state_fs	Boolean
interval	Integer

Additional resources

For more information about configuring the battery plugin, see battery.

collectd::plugin::bind

Use the bind plugin to retrieve encoded statistics about queries and responses from a DNS server, and submit those values to collectd.

Table 5.6. bind parameters
Parameter	Type
url	HTTP URL
memorystats	Boolean
opcodes	Boolean
parsetime	Boolean
qtypes	Boolean
resolverstats	Boolean
serverstats	Boolean
zonemaintstats	Boolean
views	Array
interval	Integer

Table 5.7. bind views parameters
Parameter	Type
name	String
qtypes	Boolean
resolverstats	Boolean
cacherrsets	Boolean
zones	List of strings

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - bind

  ExtraConfig:
    collectd::plugins::bind:
      url: http://localhost:8053/
      memorystats: true
      opcodes: true
      parsetime: false
      qtypes: true
      resolverstats: true
      serverstats: true
      zonemaintstats: true
      views:
      - name: internal
        qtypes: true
        resolverstats: true
        cacherrsets: true
      - name: external
        qtypes: true
        resolverstats: true
        cacherrsets: true
        zones:
        - "example.com/IN"

collectd::plugin::ceph

Use the ceph plugin to gather data from ceph daemons.

Table 5.8. ceph parameters
Parameter	Type
daemons	Array
longrunavglatency	Boolean
convertspecialmetrictypes	Boolean
package_name	String

Example configuration:

parameter_defaults:
    ExtraConfig:
        collectd::plugin::ceph::daemons:
           - ceph-osd.0
           - ceph-osd.1
           - ceph-osd.2
           - ceph-osd.3
           - ceph-osd.4

Note

If an Object Storage Daemon (OSD) is not on every node, you must list the OSDs.

When you deploy collectd, the ceph plugin is added to the Ceph nodes. Do not add the ceph plugin on Ceph nodes to CollectdExtraPlugins because this results in a deployment failure.

Additional resources

For more information about configuring the ceph plugin, see ceph.

collectd::plugins::cgroups

Use the cgroups plugin to collect information for processes in a cgroup.

Table 5.9. cgroups parameters
Parameter	Type
ignore_selected	Boolean
interval	Integer
cgroups	List

Additional resources

For more information about configuring the cgroups plugin, see cgroups.

collectd::plugin::connectivity

Use the connectivity plugin to monitor the state of network interfaces.

Note

If no interfaces are listed, all interfaces are monitored by default.

Table 5.10. connectivity parameters
Parameter	Type
interfaces	Array

Example configuration:

parameter_defaults:
    ExtraConfig:
        collectd::plugin::connectivity::interfaces:
        - eth0
        - eth1

Additional resources

For more information about configuring the connectivity plugin, see connectivity.

collectd::plugin::conntrack

Use the conntrack plugin to track the number of entries in the Linux connection-tracking table. There are no parameters for this plugin.

collectd::plugin::contextswitch

Use the ContextSwitch plugin to collect the number of context switches that the system handles. The only parameter available is interval, which is a polling interval defined in seconds.

Additional resources

For more information about configuring the contextswitch plugin, see contextswitch.

collectd::plugin::cpu

Use the cpu plugin to monitor the time that the CPU spends in various states, for example, idle, executing user code, executing system code, waiting for IO-operations, and other states.

The cpu plugin collects jiffies, not percentage values. The value of a jiffy depends on the clock frequency of your hardware platform, and therefore is not an absolute time interval unit.

To report a percentage value, set the Boolean parameters reportbycpu and reportbystate to true, and then set the Boolean parameter valuespercentage to true.

This plugin is enabled by default.

Table 5.11. cpu metrics
Name	Description	Query
idle	Amount of idle time	`collectd_cpu_total{...,type_instance='idle'}`
interrupt	CPU blocked by interrupts	`collectd_cpu_total{...,type_instance='interrupt'}`
nice	Amount of time running low priority processes	`collectd_cpu_total{...,type_instance='nice'}`
softirq	Amount of cycles spent in servicing interrupt requests	`collectd_cpu_total{...,type_instance='waitirq'}`
steal	The percentage of time a virtual CPU waits for a real CPU while the hypervisor is servicing another virtual processor	`collectd_cpu_total{...,type_instance='steal'}`
system	Amount of time spent on system level (kernel)	`collectd_cpu_total{...,type_instance='system'}`
user	Jiffies that user processes use	`collectd_cpu_total{...,type_instance='user'}`
wait	CPU waiting on outstanding I/O request	`collectd_cpu_total{...,type_instance='wait'}`

Table 5.12. cpu parameters
Parameter	Type	Defaults
reportbystate	Boolean	true
valuespercentage	Boolean	true
reportbycpu	Boolean	true
reportnumcpu	Boolean	false
reportgueststate	Boolean	false
subtractgueststate	Boolean	true
interval	Integer	120

Example configuration:

parameter_defaults:
    CollectdExtraPlugins:
      - cpu
    ExtraConfig:
        collectd::plugin::cpu::reportbystate: true

Additional resources

For more information about configuring the cpu plugin, see cpu.

collectd::plugin::cpufreq

Use the cpufreq plugin to collect the current CPU frequency. There are no parameters for this plugin.

collectd::plugin::csv

Use the csv plugin to write values to a local file in CSV format.

Table 5.13. csv parameters
Parameter	Type
datadir	String
storerates	Boolean
interval	Integer

collectd::plugin::df

Use the df plugin to collect disk space usage information for file systems.

This plugin is enabled by default.

Table 5.14. df metrics
Name	Description	Query
free	Amount of free disk space	`collectd_df_df_complex{...,type_instance="free"}`
reserved	Amount of reserved disk space	`collectd_df_df_complex{...,type_instance="reserved"}`
used	Amount of used disk space	`collectd_df_df_complex{...,type_instance="used"}`

Table 5.15. df parameters
Parameter	Type	Defaults
devices	Array	`[]`
fstypes	Array	`['xfs']`
ignoreselected	Boolean	true
mountpoints	Array	`[]`
reportbydevice	Boolean	true
reportinodes	Boolean	true
reportreserved	Boolean	true
valuesabsolute	Boolean	true
valuespercentage	Boolean	false

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::df::fstypes: ['tmpfs','xfs']

Additional resources

For more information about configuring the df plugin, see df.

collectd::plugin::disk

Use the disk plugin to collect performance statistics of hard disks and, if supported, partitions.

Note

The disk plugin monitors all disks by default. You can use the ignoreselected parameter to ignore a list of disks. The example configuration ignores the sda, sdb, and sdc disks, and monitors all disks not included in the list.

This plugin is enabled by default.

Table 5.16. disk parameters
Parameter	Type	Defaults
disks	Array	`[]`
ignoreselected	Boolean	false
udevnameattr	String	<undefined>

Table 5.17. disk metrics
Name	Description
merged	The number of queued operations that can be merged together, for example, one physical disk access served two or more logical operations.
time	The average time an I/O-operation takes to complete. The values might not be accurate.
io_time	Time spent doing I/Os (ms). You can use this metric as a device load percentage. A value of 1 second matches 100% of load.
weighted_io_time	Measure of both I/O completion time and the backlog that might be accumulating.
pending_operations	Shows queue size of pending I/O operations.

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::disk::disks: ['sda', 'sdb', 'sdc']
    collectd::plugin::disk::ignoreselected: true

Additional resources

For more information about configuring the disk plugin, see disk.

collectd::plugin::hugepages

Use the hugepages plugin to collect hugepages information.

This plugin is enabled by default.

Table 5.18. hugepages parameters
Parameter	Type	Defaults
report_per_node_hp	Boolean	true
report_root_hp	Boolean	true
values_pages	Boolean	true
values_bytes	Boolean	false
values_percentage	Boolean	false

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::hugepages::values_percentage: true

Additional resources

For more information about configuring the hugepages plugin, see hugepages.

collectd::plugin::interface

Use the interface plugin to measure interface traffic in octets, packets per second, and error rate per second.

This plugin is enabled by default.

Table 5.19. interface parameters
Parameter	Type	Default
interfaces	Array	`[]`
ignoreselected	Boolean	false
reportinactive	Boolean	true

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::interface::interfaces:
      - lo
    collectd::plugin::interface::ignoreselected: true

Additional resources

For more information about configuring the interfaces plugin, see interfaces.

collectd::plugin::load

Use the load plugin to collect the system load and an overview of the system use.

This plugin is enabled by default.

Table 5.20. plugin parameters
Parameter	Type	Default
report_relative	Boolean	true

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::load::report_relative: false

Additional resources

For more information about configuring the load plugin, see load.

collectd::plugin::mcelog

Use the mcelog plugin to send notifications and statistics that are relevant to Machine Check Exceptions when they occur. Configure mcelog to run in daemon mode and enable logging capabilities.

Table 5.21. mcelog parameters
Parameter	Type
Mcelogfile	String
Memory	Hash `{ mcelogclientsocket[string], persistentnotification[boolean] }`

Example configuration:

parameter_defaults:
    CollectdExtraPlugins: mcelog
    CollectdEnableMcelog: true

Additional resources

For more information about configuring the mcelog plugin, see mcelog.

collectd::plugin::memcached

Use the memcached plugin to retrieve information about memcached cache usage, memory, and other related information.

Table 5.22. memcached parameters
Parameter	Type
instances	Hash
interval	Integer

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - memcached

  ExtraConfig:
    collectd::plugin::memcached::instances:
      local:
        host: "%{hiera('fqdn_canonical')}"
        port: 11211

Additional resources

For more information about configuring the memcached plugin, see memcached.

collectd::plugin::memory

Use the memory plugin to retrieve information about the memory of the system.

This plugin is enabled by default.

Table 5.23. memory parameters
Parameter	Type
Defaults	valuesabsolute
Boolean	true
valuespercentage	Boolean

Example configuration:

parameter_defaults:
  ExtraConfig:
    collectd::plugin::memory::valuesabsolute: true
    collectd::plugin::memory::valuespercentage: false

Additional resources

For more information about configuring the memory plugin, see memory.

collectd::plugin::ntpd

Use the ntpd plugin to query a local NTP server that is configured to allow access to statistics, and retrieve information about the configured parameters and the time sync status.

Table 5.24. ntpd parameters
Parameter	Type
host	Hostname
port	Port number (Integer)
reverselookups	Boolean
includeunitid	Boolean
interval	Integer

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - ntpd

  ExtraConfig:
    collectd::plugin::ntpd::host: localhost
    collectd::plugin::ntpd::port: 123
    collectd::plugin::ntpd::reverselookups: false
    collectd::plugin::ntpd::includeunitid: false

Additional resources

For more information about configuring the ntpd plugin, see ntpd.

collectd::plugin::ovs_stats

Use the ovs_stats plugin to collect statistics of OVS-connected interfaces. The ovs_stats plugin uses the OVSDB management protocol (RFC7047) monitor mechanism to get statistics from OVSDB.

Table 5.25. ovs_stats parameters
Parameter	Type
address	String
bridges	List
port	Integer
socket	String

Example configuration:

The following example shows how to enable the ovs_stats plugin. If you deploy your overcloud with OVS, you do not need to enable the ovs_stats plugin.

    parameter_defaults:
        CollectdExtraPlugins:
          - ovs_stats
        ExtraConfig:
          collectd::plugin::ovs_stats::socket: '/run/openvswitch/db.sock'

Additional resources

For more information about configuring the ovs_stats plugin, see ovs_stats.

collectd::plugin::processes

The processes plugin provides information about system processes. If you do not specify custom process matching, the plugin collects only the number of processes by state and the process fork rate.

To collect more details about specific processes, you can use the process parameter to specify a process name or the process_match option to specify process names that match a regular expression. The statistics for a process_match output are grouped by process name.

Table 5.26. plugin parameters
Parameter	Type	Defaults
processes	Array	<undefined>
process_matches	Array	<undefined>
collect_context_switch	Boolean	<undefined>
collect_file_descriptor	Boolean	<undefined>
collect_memory_maps	Boolean	<undefined>

Additional resources

For more information about configuring the processes plugin, see processes.

collectd::plugin::smart

Use the smart plugin to collect SMART (self-monitoring, analysis and reporting technology) information from physical disks on the node. You must also set the parameter CollectdContainerAdditionalCapAdd to CAP_SYS_RAWIO to allow the smart plugin to read SMART telemetry. If you do not set the CollectdContainerAdditionalCapAdd parameter, the following message is written to the collectd error logs:

smart plugin: Running collectd as root, but the CAP_SYS_RAWIO capability is missing. The plugin's read function will probably fail. Is your init system dropping capabilities?.

Table 5.27. smart parameters
Parameter	Type
disks	Array
ignoreselected	Boolean
interval	Integer

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - smart

  CollectdContainerAdditionalCapAdd: "CAP_SYS_RAWIO"

Additional information

For more information about configuring the smart plugin, see smart.

collectd::plugin::swap

Use the swap plugin to collect information about the available and used swap space.

Table 5.28. swap parameters
Parameter	Type
reportbydevice	Boolean
reportbytes	Boolean
valuesabsolute	Boolean
valuespercentage	Boolean
reportio	Boolean

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - swap

  ExtraConfig:
    collectd::plugin::swap::reportbydevice: false
    collectd::plugin::swap::reportbytes: true
    collectd::plugin::swap::valuesabsolute: true
    collectd::plugin::swap::valuespercentage: false
    collectd::plugin::swap::reportio: true

collectd::plugin::tcpconns

Use the tcpconns plugin to collect information about the number of TCP connections inbound or outbound from the configured port. The local port configuration represents ingress connections. The remote port configuration represents egress connections.

Table 5.29. tcpconns parameters
Parameter	Type
localports	Port (Array)
remoteports	Port (Array)
listening	Boolean
allportssummary	Boolean

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - tcpconns

  ExtraConfig:
    collectd::plugin::tcpconns::listening: false
    collectd::plugin::tcpconns::localports:
    - 22
    collectd::plugin::tcpconns::remoteports:
    - 22

collectd::plugin::thermal

Use the thermal plugin to retrieve ACPI thermal zone information.

Table 5.30. thermal parameters
Parameter	Type
devices	Array
ignoreselected	Boolean
interval	Integer

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - thermal

collectd::plugin::uptime

Use the uptime plugin to collect information about system uptime.

This plugin is enabled by default.

Table 5.31. uptime parameters
Parameter	Type
interval	Integer

collectd::plugin::virt

Use the virt plugin to collect CPU, disk, network load, and other metrics through the libvirt API for virtual machines on the host.

This plugin is enabled by default on compute hosts.

Table 5.32. virt parameters
Parameter	Type
connection	String
refresh_interval	Hash
domain	String
block_device	String
interface_device	String
ignore_selected	Boolean
plugin_instance_format	String
hostname_format	String
interface_format	String
extra_stats	String

Example configuration:

ExtraConfig:
  collectd::plugin::virt::hostname_format: "name uuid hostname"
  collectd::plugin::virt::plugin_instance_format: metadata

Additional resources

For more information about configuring the virt plugin, see virt.

collectd::plugin::vmem

Use the vmem plugin to collect information about virtual memory from the kernel subsystem.

Table 5.33. vmem parameters
Parameter	Type
verbose	Boolean
interval	Integer

Example configuration:

parameter_defaults:
  CollectdExtraPlugins:
  - vmem

  ExtraConfig:
    collectd::plugin::vmem::verbose: true

collectd::plugin::write_http

Use the write_http output plugin to submit values to an HTTP server by using POST requests and encoding metrics with JSON, or by using the PUTVAL command.

Table 5.34. write_http parameters
Parameter	Type
ensure	Enum[present, absent]
nodes	Hash[String, Hash[String, Scalar]]
urls	Hash[String, Hash[String, Scalar]]
manage_package	Boolean

Example configuration:

parameter_defaults:
    CollectdExtraPlugins:
      - write_http
    ExtraConfig:
        collectd::plugin::write_http::nodes:
            collectd:
                url: “http://collectd.tld.org/collectd”
                metrics: true
                header: “X-Custom-Header: custom_value"

Additional resources

For more information about configuring the write_http plugin, see write_http.

collectd::plugin::write_kafka

Use the write_kafka plugin to send values to a Kafka topic. Configure the write_kafka plugin with one or more topic blocks. For each topic block, you must specify a unique name and one Kafka producer. You can use the following per-topic parameters inside the topic block:

Table 5.35. write_kafka parameters
Parameter	Type
kafka_hosts	Array[String]
topics	Hash
properties	Hash
meta	Hash

Example configuration:

parameter_defaults:
    CollectdExtraPlugins:
       - write_kafka
    ExtraConfig:
      collectd::plugin::write_kafka::kafka_hosts:
        - remote.tld:9092
      collectd::plugin::write_kafka::topics:
        mytopic:
          format: JSON

Additional resources:

For more information about how to configure the write_kafka plugin, see write_kafka.

Chapter 5. collectd plugins

collectd::plugin::aggregation

collectd::plugin::amqp1

collectd::plugin::apache

collectd::plugin::battery

collectd::plugin::bind

collectd::plugin::ceph

collectd::plugins::cgroups

collectd::plugin::connectivity

collectd::plugin::conntrack

collectd::plugin::contextswitch

collectd::plugin::cpu

collectd::plugin::cpufreq

collectd::plugin::csv

collectd::plugin::df

collectd::plugin::disk

collectd::plugin::hugepages

collectd::plugin::interface

collectd::plugin::load

collectd::plugin::mcelog

collectd::plugin::memcached

collectd::plugin::memory

collectd::plugin::ntpd

collectd::plugin::ovs_stats

collectd::plugin::processes

collectd::plugin::smart

collectd::plugin::swap

collectd::plugin::tcpconns

collectd::plugin::thermal

collectd::plugin::uptime

collectd::plugin::virt

collectd::plugin::vmem

collectd::plugin::write_http

collectd::plugin::write_kafka

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