Plugin:exec-redis.sh

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exec-redis.sh plugin
Type: read
Callbacks: n/a
Status: external
First version: n/a
Copyright: 2010 Astro
License: unknown
Manpage: n/a
List of Plugins

The exec-redis.sh plugin reads statistics from Redis, a high-performance NoSQL data structure server with persistent storage.

Contents

Code

Create /etc/collectd/redis.sh and make it executable:

#!/bin/bash
 
HOSTNAME="${COLLECTD_HOSTNAME:-`hostname -f`}"
INTERVAL="${COLLECTD_INTERVAL:-10}"
PORT=6379
 
while sleep "$INTERVAL"
do
 
info=$(echo info|nc -w 1 127.0.0.1 $PORT)
connected_clients=$(echo "$info"|awk -F : '$1 == "connected_clients" {print $2}')
connected_slaves=$(echo "$info"|awk -F : '$1 == "connected_slaves" {print $2}')
uptime=$(echo "$info"|awk -F : '$1 == "uptime_in_seconds" {print $2}')
used_memory=$(echo "$info"|awk -F ":" '$1 == "used_memory" {print $2}'|sed -e 's/\r//')
changes_since_last_save=$(echo "$info"|awk -F : '$1 == "changes_since_last_save" {print $2}')
total_commands_processed=$(echo "$info"|awk -F : '$1 == "total_commands_processed" {print $2}')
keys=$(echo "$info"|egrep -e "^db0"|sed -e 's/^.\+:keys=//'|sed -e 's/,.\+//')
 
echo "PUTVAL $HOSTNAME/redis-$PORT/memcached_connections-clients interval=$INTERVAL N:$connected_clients"
echo "PUTVAL $HOSTNAME/redis-$PORT/memcached_connections-slaves interval=$INTERVAL N:$connected_slaves"
echo "PUTVAL $HOSTNAME/redis-$PORT/uptime interval=$INTERVAL N:$uptime"
echo "PUTVAL $HOSTNAME/redis-$PORT/df-memory interval=$INTERVAL N:$used_memory:U"
echo "PUTVAL $HOSTNAME/redis-$PORT/files-unsaved_changes interval=$INTERVAL N:$changes_since_last_save"
echo "PUTVAL $HOSTNAME/redis-$PORT/memcached_command-total interval=$INTERVAL N:$total_commands_processed"
echo "PUTVAL $HOSTNAME/redis-$PORT/memcached_items-db0 interval=$INTERVAL N:$keys"
 
done

Configuration

Configure the Exec plugin:

<Plugin exec>
	Exec nobody "/etc/collectd/redis.sh"
</Plugin>

Example graph

Plugin-exec-redis-commands.png

Dependencies

  • nc(1) (netcat)
  • awk(1)

See also

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