RiakKV

Plugin: python.d.plugin Module: riakkv

Overview

This collector monitors RiakKV metrics about throughput, latency, resources and more.'

This collector reads the database stats from the /stats endpoint.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

If the /stats endpoint is accessible, RiakKV instances on the local host running on port 8098 will be autodetected.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per RiakKV instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
riak.kv.throughput	gets, puts	operations/s
riak.dt.vnode_updates	counters, sets, maps	operations/s
riak.search	queries	queries/s
riak.search.documents	indexed	documents/s
riak.consistent.operations	gets, puts	operations/s
riak.kv.latency.get	mean, median, 95, 99, 100	ms
riak.kv.latency.put	mean, median, 95, 99, 100	ms
riak.dt.latency.counter_merge	mean, median, 95, 99, 100	ms
riak.dt.latency.set_merge	mean, median, 95, 99, 100	ms
riak.dt.latency.map_merge	mean, median, 95, 99, 100	ms
riak.search.latency.query	median, min, 95, 99, 999, max	ms
riak.search.latency.index	median, min, 95, 99, 999, max	ms
riak.consistent.latency.get	mean, median, 95, 99, 100	ms
riak.consistent.latency.put	mean, median, 95, 99, 100	ms
riak.vm	processes	total
riak.vm.memory.processes	allocated, used	MB
riak.kv.siblings_encountered.get	mean, median, 95, 99, 100	siblings
riak.kv.objsize.get	mean, median, 95, 99, 100	KB
riak.search.vnodeq_size	mean, median, 95, 99, 100	messages
riak.search.index	errors	errors
riak.core.protobuf_connections	active	connections
riak.core.repairs	read	repairs
riak.core.fsm_active	get, put, secondary index, list keys	fsms
riak.core.fsm_rejected	get, put	fsms
riak.search.index	bad_entry, extract_fail	writes

Alerts

The following alerts are available:

Alert name	On metric	Description
riakkv_1h_kv_get_mean_latency	riak.kv.latency.get	average time between reception of client GET request and subsequent response to client over the last hour
riakkv_kv_get_slow	riak.kv.latency.get	average time between reception of client GET request and subsequent response to the client over the last 3 minutes, compared to the average over the last hour
riakkv_1h_kv_put_mean_latency	riak.kv.latency.put	average time between reception of client PUT request and subsequent response to the client over the last hour
riakkv_kv_put_slow	riak.kv.latency.put	average time between reception of client PUT request and subsequent response to the client over the last 3 minutes, compared to the average over the last hour
riakkv_vm_high_process_count	riak.vm	number of processes running in the Erlang VM
riakkv_list_keys_active	riak.core.fsm_active	number of currently running list keys finite state machines

Setup

Prerequisites

Configure RiakKV to enable /stats endpoint

You can follow the RiakKV configuration reference documentation for how to enable this.

Source : https://docs.riak.com/riak/kv/2.2.3/configuring/reference/#client-interfaces

Configuration

File

The configuration file name for this integration is python.d/riakkv.conf.

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config python.d/riakkv.conf

Options

There are 2 sections:

• Global variables
• One or more JOBS that can define multiple different instances to monitor.

The following options can be defined globally: priority, penalty, autodetection_retry, update_every, but can also be defined per JOB to override the global values.

Additionally, the following collapsed table contains all the options that can be configured inside a JOB definition.

Every configuration JOB starts with a job_name value which will appear in the dashboard, unless a name parameter is specified.

Config options

Name	Description	Default	Required
update_every	Sets the default data collection frequency.	5	no
priority	Controls the order of charts at the netdata dashboard.	60000	no
autodetection_retry	Sets the job re-check interval in seconds.	0	no
penalty	Indicates whether to apply penalty to update_every in case of failures.	yes	no
url	The url of the server	no	yes

Examples

Basic (default)

A basic example configuration per job

local:
url: 'http://localhost:8098/stats'

Multi-instance

Note: When you define multiple jobs, their names must be unique.

Collecting metrics from local and remote instances.

Config

local:
  url: 'http://localhost:8098/stats'

remote:
  url: 'http://192.0.2.1:8098/stats'

Troubleshooting

Debug Mode

To troubleshoot issues with the riakkv collector, run the python.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

• Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

  cd /usr/libexec/netdata/plugins.d/

• Switch to the netdata user.

  sudo -u netdata -s

• Run the python.d.plugin to debug the collector:

  ./python.d.plugin riakkv debug trace