Redis collector

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker.

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This module monitors one or more Redis instances, depending on your configuration.

It collects information and statistics about the server executing the following commands:

• INFO ALL

Metrics

All metrics have "redis." prefix.

Metric	Scope	Dimensions	Units
connections	global	accepted, rejected	connections/s
clients	global	connected, blocked, tracking, in_timeout_table	clients
ping_latency	global	min, max, avg	seconds
commands	global	processes	commands/s
keyspace_lookup_hit_rate	global	lookup_hit_rate	percentage
memory	global	max, used, rss, peak, dataset, lua, scripts	bytes
mem_fragmentation_ratio	global	mem_fragmentation	ratio
key_eviction_events	global	evicted	keys/s
net	global	received, sent	kilobits/s
rdb_changes	global	changes	operations
bgsave_now	global	current_bgsave_time	seconds
bgsave_health	global	last_bgsave	status
bgsave_last_rdb_save_since_time	global	last_bgsave_time	seconds
aof_file_size	global	current, base	bytes
commands_calls	global	a dimension per command	calls
commands_usec	global	a dimension per command	microseconds
commands_usec_per_sec	global	a dimension per command	microseconds/s
key_expiration_events	global	expired	keys/s
database_keys	global	a dimension per database	keys
database_expires_keys	global	a dimension per database	keys
connected_replicas	global	connected	replicas
master_link_status	global	up, down	status
master_last_io_since_time	global	time	seconds
master_link_down_since_time	global	time	seconds
uptime	global	uptime	seconds

Configuration

Edit the go.d/redis.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata # Replace this path with your Netdata config directory
sudo ./edit-config go.d/redis.conf

There are two connection types: by tcp socket and by unix socket.

Note: If the Redis server is password protected via the requirepass option, make sure you have a colon before the password.

# by tcp socket
redis://<user>:<password>@<host>:<port>

# by unix socket
unix://<user>:<password>@</path/to/redis.sock

Needs only address, here is an example with two jobs:

jobs:
  - name: local
    address: 'redis://@127.0.0.1:6379'

  - name: local
    address: 'redis://:[email protected]:6379'

  - name: local
    address: 'redis://127.0.0.1:6379'
    username: 'user'
    password: 'password'

  - name: remote
    address: 'redis://user:[email protected]:6379'

For all available options, see the redis collector's configuration file.

Troubleshooting

To troubleshoot issues with the redis collector, run the go.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 go.d.plugin to debug the collector:

  ./go.d.plugin -d -m redis