Twemproxy

Agent Check

Supported OS:

Overview

Track overall and per-pool stats on each of your twemproxy servers. This Agent check collects metrics for client and server connections and errors, request and response rates, bytes in and out of the proxy, and more.

Setup

Installation

The Agent’s Twemproxy check is included in the Datadog Agent package, so you don’t need to install anything else on your Twemproxy servers.

Configuration

Edit the twemproxy.d/conf.yaml file in the conf.d/ folder at the root of your Agent’s directory. See the sample twemproxy.d/conf.yaml for all available configuration options:
```
init_config:

instances:
    - host: localhost
      port: 2222 # change if your twemproxy doesn't use the default stats monitoring port
```
Restart the Agent to begin sending twemproxy metrics to Datadog.

Validation

Run the Agent’s status subcommand and look for twemproxy under the Checks section.

Data Collected

Metrics

twemproxy.curr_connections (gauge)	number of current connections shown as connection
twemproxy.total_connections (gauge)	rate of new connections shown as connection
twemproxy.client_eof (gauge)	number of eof on client connections shown as error
twemproxy.client_err (gauge)	number of errors on client connections shown as error
twemproxy.client_connections (gauge)	number of active client connections shown as connection
twemproxy.server_ejects (gauge)	number of times backend server was ejected shown as event
twemproxy.forward_error (gauge)	number of times we encountered a forwarding error shown as error
twemproxy.fragments (gauge)	number of fragments created from a multi-vector request shown as request
twemproxy.in_queue (gauge)	number of requests in incoming queue shown as request
twemproxy.out_queue (gauge)	number of requests in outgoing queue shown as request
twemproxy.in_queue_bytes (gauge)	current request bytes in incoming queue shown as byte
twemproxy.out_queue_bytes (gauge)	current request bytes in outgoing queue shown as byte
twemproxy.server_connections (gauge)	number of active server connections shown as connection
twemproxy.server_err (gauge)	number of errors on server connections shown as error
twemproxy.server_timedout (gauge)	number of timeouts on server connections shown as timeout
twemproxy.server_eof (gauge)	number of eof on server connections shown as error
twemproxy.responses (gauge)	number of responses shown as response
twemproxy.requests (gauge)	number of requests shown as request
twemproxy.response_bytes (gauge)	number of responses shown as byte
twemproxy.request_bytes (gauge)	number of requests shown as byte

Events

The Twemproxy check does not include any events at this time.

Service Checks

twemproxy.can_connect:

Returns CRITICAL if the Agent cannot connect to the Twemproxy stats endpoint to collect metrics, otherwise OK.

Troubleshooting

Need help? Contact Datadog Support.