prometheus_exporters

Cookbook to install and configure various Prometheus exporters on systems to be monitored by Prometheus.

Currently supported exporters are node, postgres, redis, snmp, and wmi. More may be added in the future. Please contact the author if you have specific requests.

All of the exporters are available as chef custom resources that can be instantiated from other cookbooks.

Supports

• Ubuntu 14.04
• Ubuntu 16.04
• Ubuntu 18.04
• Debian 8
• Debian 9
• CentOS 6
• CentOS 7

And probably other RHEL or Debian based distributions.

• Windows Server 2012 & 2016 (wmi_exporter recipe only)

Tests are made using last available Chef 14 along with latest Chef 13.

Resources

blackbox_exporter

This exporter requires a config file. Read more here. For basic usage the default blackbox.yml should be sufficient.

• web_listen_address Address to listen on for web interface and telemetry. (default: ":9115")
• log_level Only log messages with the given severity or above. Valid levels: [debug, info, warn, error]
• config_file default: /opt/blackbox_exporter-#{node['prometheus_exporters']['blackbox']['version']}.linux-amd64/blackbox.yml
• timeout_offset default: 0.5 Offset to subtract from timeout in seconds.

blackbox_exporter 'main'

node_exporter

• web_listen_address Address to listen on for web interface and telemetry. (default: ":9100")
• web_telemetry_path Path under which to expose metrics. (default: "/metrics")
• log_level Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]
• log_format Where to send log files. (default: "logger:stdout")
• collectors_enabled An array of explicitly enabled collectors.
• collectors_disabled An array of explicitly disabled collectors.
• collector_megacli_command Command to run megacli. (default: "megacli")
• collector_ntp_server NTP server to use for ntp collector. (default: "127.0.0.1")
• collector_ntp_protocol_version NTP protocol version. (default: "4")
• collector_ntp_server_is_local Certify that collector.ntp.server address is the same local host as this collector.
• collector_ntp_ip_ttl IP TTL to use while sending NTP query. (default: "1")
• collector_ntp_max_distance Max accumulated distance to the root. (default: "3.46608s")
• collector_ntp_local_offset_tolerance Offset between local clock and local ntpd time to tolerate. (default: "1ms")
• path_procfs procfs mountpoint. (default: "/proc")
• path_sysfs sysfs mountpoint. (default: "/sys")
• collector_textfile_directory Directory to read text files with metrics from. (default: "")
• collector_netdev_ignored_devices Regexp of net devices to ignore for netdev collector. (default: "")
• collector_diskstats_ignored_devices Regexp of devices to ignore for diskstats. (default: "^{ram|loop|fd|(h|s|v|xv}d[a-z]|nvme\d+n\d+p)\d+$")
• collector_filesystem_ignored_fs_types Regexp of filesystem types to ignore for filesystem collector. (default: "^{sys|proc|auto}fs$")
• collector_filesystem_ignored_mount_points Regexp of mount points to ignore for filesystem collector. (default: "^{/(sys|proc|dev)($|/)")}
• custom_options Use for your configuration if defined proterties are not satisfying your needs.

listen_ip = '127.0.0.1'

node_exporter 'main' do
  web_listen_address "#{listen_ip}:9100"
  action [:enable, :start]
end

or just set

• node['prometheus_exporters']['listen_interface']
• node['prometheus_exporters']['node']['collectors']
• node['prometheus_exporters']['node']['textfile_directory']
• node['prometheus_exporters']['node']['ignored_net_devs']

and add recipe['prometheus_exporters::node] to your run_list.

mysqld_exporter

The mysqld_exporter resource supports running multiple copies of the MySQL exporter on the same system.

• instance_name name of MySQL exporter instance. (name attribute)
• data_source_name MySQL connection string
• config_my_cnf Path to .my.cnf file to read MySQL credentials from. (default: ~/.my.cnf)
• log_format If set use a syslog logger or JSON logging. Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true. Defaults to stderr.
• log_level Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal].
• web_listen_address Address to listen on for web interface and telemetry. (default "127.0.0.1:9104")
• web_telemetry_path Path under which to expose metrics. (default "/metrics")
• user System user to run exporter as. (default "mysql")
• collector_flags Specify which collector flags you wish to use.

(default)

'\
-collect.global_status \
-collect.engine_innodb_status \
-collect.global_variables \
-collect.info_schema.clientstats \
-collect.info_schema.innodb_metrics \
-collect.info_schema.processlist \
-collect.info_schema.tables.databases \
-collect.info_schema.tablestats \
-collect.slave_status \
-collect.binlog_size \
-collect.perf_schema.tableiowaits \
-collect.perf_schema.indexiowaits \
-collect.perf_schema.tablelocks'


mysqld_exporter 'main' do
  data_source_name '/'
  config_my_cnf '~/.my/cnf'
  user 'mysql'
end

postgres_exporter

The postgres_exporter resource supports running multiple copies of PostgreSQL exporter the same system. This is useful if you have multiple copies of PostgreSQL running on the same system
(eg. different versions) or you are connecting to multiple remote PostgreSQL servers across the network.

• instance_name name of PostgreSQL exporter instance. (name attribute)
• data_source_name PostgreSQL connection string. E.g. postgresql://login:password@hostname:port/dbname
• extend_query_path Path to custom queries to run
• log_format If set use a syslog logger or JSON logging. Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true. Defaults to stderr.
• log_level Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal].
• web_listen_address Address to listen on for web interface and telemetry. (default "127.0.0.1:9187")
• web_telemetry_path Path under which to expose metrics. (default "/metrics")
• user System user to run exporter as. (default "postgres")

postgres_exporter '9.5_main' do
  data_source_name 'postgresql://localhost:5432/example'
  user 'postgres'
end

process_exporter

Monitor resource usage of processes or process groups. Read more here.

• web_listen_address Address to listen on for web interface and telemetry. Default: ":9256"
• web_telemetry_path Path for the metrics endpoint. Default: '/metrics'
• config_file Optional config file for configuring which processes to monitor. The example below monitors all processes on the system. Alternately specific process names and groups may be specified using the proc_names and name_mapping properties
• proc_names Comma separated list of process names to monitor
• name_mapping Comma-separated list of alternating name,regexp values. It allows assigning a name to a process based on a combination of the process name and command line
• path_procfs procfs mountpoint. Default: "/proc"
• children If set, any process that otherwise isn't part of its own group becomes part of the first group found (if any) when walking the process tree upwards. In other words, resource usage of subprocesses is added to their parent's usage unless the subprocess identifies as a different group name. Default: true
• recheck On each scrape the process names are re-evaluated. This is disabled by default as an optimization, but since processes can choose to change their names, this may result in a process falling into the wrong group if we happen to see it for the first time before it's assumed its proper name. Default: false
• debug Print debug information to the log. default: false
• custom_options Use for your configuration if defined proterties are not satisfying your needs.

process_exporter 'main' do
  config_file "/opt/process-exporter-#{node['prometheus_exporters']['process']['version']}.linux-amd64/all.yml"

  action %i[install enable]
end

file "/opt/process-exporter-#{node['prometheus_exporters']['process']['version']}.linux-amd64/all.yml" do
  content <<HERE
    process_names:
    - name: "{{.Comm}}"
      cmdline:
      - '.+'
HERE
  notifies :start, 'process_exporter[main]'
end

redis_exporter

• web_listen_address Address to listen on for web interface and telemetry. (default: "0.0.0.0:9121")
• web_telemetry_path Path under which to expose metrics. (default: "/metrics")
• log_format In what format should logs be shown. (default: "txt")
• debug Enable or disable debug output. (default: false)
• check_keys Comma separated list of keys to export value and length/size, eg: db3=user_count will export key user_count from db 3. db defaults to 0 if omitted. (default: "")
• redis_addr Address of one or more redis nodes, comma separated. (default: "redis://localhost:6379")
• redis_password Password to use when authenticating to Redis. (default: "")
• redis_alias Alias for redis node addr, comma separated. (default: "")
• redis_file Path to file containing one or more redis nodes, separated by newline. This option is mutually exclusive with redis.addr. Each line can optionally be comma-separated with the fields.
• namespace Namespace for the metrics. (defaults "redis")
• user User under whom to start redis exporter. (default: "root")

redis_exporter 'main' do
  redis_addr 'redis://db01.example.com:6379,redis://10.0.0.1:6379'
  redis_password 'password_one,password_two'
  redis_alias 'example_production,example_staging'
end

snmp_exporter

This exporter needs a custom generated config file. Read more here and here. For test purposes and the most basic usage you can grab a default snmp.yml which is located here: /opt/snmp_exporter-PASTE_CURRENT_VERSION.linux-amd64/snmp.yml

• web_listen_address Address to listen on for web interface and telemetry. (default: ":9116")
• log_level Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]
• log_format Where to send log files. (default: "logger:stdout")
• config_file default: '/etc/snmp_exporter/snmp.yaml'
• custom_options Any other raw options for your configuration if defined proterties are not satisfying your needs.

snmp_exporter 'main' do
  config_file "/opt/snmp_exporter-#{node['prometheus_exporters']['snmp']['version']}.linux-amd64/snmp.yml"
end

wmi_exporter

Expects the Chocolatey package manager to already be installed. This is up to individuals to provide by including the Chocolatey cookbook in their own wrapper cookbooks.

• version, String, default: '0.2.7'
• enabled_collectors, String, default: 'cpu,cs,logical_disk,net,os,service,system'
• listen_address, String, default: '0.0.0.0'
• listen_port, String, default: '9182'
• metrics_path, Strin, default: '/metrics'

Use the given defaults or set the attributes...

• node['prometheus_exporters']['wmi']['version']['listen_interface']
• node['prometheus_exporters']['wmi']['listen_address']
• node['prometheus_exporters']['wmi']['listen_port']
• node['prometheus_exporters']['wmi']['metrics_path']

and add recipe['prometheus_exporters::wmi] to your run_list.

Discovery

Each exporter will set an attribute when it's enabled, in the form of node['prometheus_exporters'][exporter_name]['enabled']. This makes it possible to search for
exporters within your environment using knife search or from within other cookbooks using a query such as:

knife search node 'prometheus_exporters_node_enabled:true'

This query will return all nodes with configured node exporters which can be used for automatically configuring Prometheus servers.

Known Issues

• The snmp_exporter requires a configuration file that is usually created by a config generator. Currently this functionality must be provided by a wrapper cookbook.