Redis Metrics Exporter

Prometheus exporter for Redis metrics.
Supports Redis 2.x, 3.x, 4.x, and 5.x

Building, configuring, and running

Build and run locally:

    $ go get github.com/oliver006/redis_exporter
    $ cd $GOPATH/src/github.com/oliver006/redis_exporter
    $ go build
    $ ./redis_exporter <flags>

Prometheus Configuration

Add a block to the scrape_configs of your prometheus.yml config file:

scrape_configs:

...

- job_name: redis_exporter
  static_configs:
  - targets: ['localhost:9121']

...

and adjust the host name accordingly.

Run via Docker:

The latest release is automatically published to the Docker registry.

You can run it like this:

    $ docker pull oliver006/redis_exporter
    $ docker run -d --name redis_exporter -p 9121:9121 oliver006/redis_exporter

The latest docker image contains only the exporter binary. If, e.g. for debugging purposes, you need the exporter running in an image that has a shell, etc then you can run the alpine image:

    $ docker run -d --name redis_exporter -p 9121:9121 oliver006/redis_exporter:alpine

If you try to access a redis instance running on the host node, you'll need to add --network host so the redis_exporter container can access it:

    $ docker run -d --name redis_exporter --network host oliver006/redis_exporter

Run on Kubernetes

Here is an example Kubernetes deployment configuration for how to deploy the redis_exporter as a sidecar with a Redis instance.

Run on Openshift

In order to deploy the exporter on Openshift environment.

oc project <myproject>

oc process -f https://raw.githubusercontent.com/oliver006/redis_exporter/master/contrib/openshift-template.yaml \
    -p REDIS_ADDR=<redis-service>:<redis-port> \
    -p REDIS_PASSWORD=<redis-pass> \
    -p REDIS_ALIAS=<redis-alias> \
    -p REDIS_FILE=<redis-file> \
    | oc create -f -

NOTE: Some of the parameters can be omitted if no authentication is used or the default redis config is applied.

oc process -f https://raw.githubusercontent.com/oliver006/redis_exporter/master/contrib/openshift-template.yaml \
    -p REDIS_ADDR=<redis-service>:<redis-port> \
    | oc create -f -

If you are running Prometheus on Openshift on the same cluster, target in prometheus.yml should point to the correct service name of the exporter

scrape_configs:

...

- job_name: redis_exporter
  static_configs:
  - targets: ['<redis-exporter.myproject.svc>:9121']

...

Run on Cloud Foundry

cf push -f contrib/manifest.yml

Flags

Name	Description
debug	Verbose debug output
log-format	Log format, valid options are txt (default) and json.
check-keys	Comma separated list of key patterns to export value and length/size, eg: db3=user_count will export key user_count from db 3. db defaults to 0 if omitted. The key patterns specified with this flag will be found using SCAN. Use this option if you need glob pattern matching; check-single-keys is faster for non-pattern keys.
check-single-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. The keys specified with this flag will be looked up directly without any glob pattern matching. Use this option if you don't need glob pattern matching; it is faster than check-keys.
script	Path to Redis Lua script for gathering extra metrics.
redis.addr	Address of one or more redis nodes, comma separated, defaults to redis://localhost:6379.
redis.password	Password to use when authenticating to Redis
redis.password-file	Path to a file containing the password to use when authenticating to Redis (note: this is mutually exclusive with redis.password)
redis.alias	Alias for redis node addr, comma separated.
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 <addr>,<password>,<alias>. See here for an example file.
namespace	Namespace for the metrics, defaults to redis.
web.listen-address	Address to listen on for web interface and telemetry, defaults to 0.0.0.0:9121.
web.telemetry-path	Path under which to expose metrics, defaults to metrics.
use-cf-bindings	Enable usage of Cloud Foundry service bindings. Defaults to false
separator	Separator used to split redis.addr, redis.password and redis.alias into several elements. Defaults to ,

Redis node addresses can be tcp addresses like redis://localhost:6379, redis.example.com:6379 or unix socket addresses like unix:///tmp/redis.sock.
SSL is supported by using the rediss:// schema, for example: rediss://azure-ssl-enabled-host.redis.cache.windows.net:6380 (note that the port is required when connecting to a non-standard 6379 port, e.g. with Azure Redis instances).

These settings take precedence over any configurations provided by environment variables.

Environment Variables

Name	Description
REDIS_ADDR	Address of Redis node(s)
REDIS_PASSWORD	Password to use when authenticating to Redis
REDIS_ALIAS	Alias name of Redis node(s)
REDIS_FILE	Path to file containing Redis node(s)

What's exported?

Most items from the INFO command are exported, see https://redis.io/commands/info for details.
In addition, for every database there are metrics for total keys, expiring keys and the average TTL for keys in the database.
You can also export values of keys if they're in numeric format by using the -check-keys flag. The exporter will also export the size (or, depending on the data type, the length) of the key. This can be used to export the number of elements in (sorted) sets, hashes, lists, streams, etc.

If you require custom metric collection, you can provide a Redis Lua script using the -script flag. An example can be found in the contrib folder.

What does it look like?

Example Grafana screenshots:

Grafana dashboard is available on grafana.net and/or github.com.

Grafana dashboard with host & alias selector is available on github.com.

What else?

Open an issue or PR if you have more suggestions or ideas about what to add.