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redis_streams

Pulls messages from Redis (v5.0+) streams with the XREADGROUP command. The client_id should be unique for each consumer of a group.

# Common config fields, showing default values
input:
  label: ""
  redis_streams:
    url: redis://:6397 # No default (required)
    body_key: body
    streams: [] # No default (required)
    auto_replay_nacks: true
    limit: 10
    client_id: ""
    consumer_group: ""

Redis stream entries are key/value pairs, as such it is necessary to specify the key that contains the body of the message. All other keys/value pairs are saved as metadata fields.

Fields​

url​

The URL of the target Redis server. Database is optional and is supplied as the URL path.

Type: string

# Examples

url: redis://:6397

url: redis://localhost:6379

url: redis://foousername:foopassword@redisplace:6379

url: redis://:foopassword@redisplace:6379

url: redis://localhost:6379/1

url: redis://localhost:6379/1,redis://localhost:6380/1

kind​

Specifies a simple, cluster-aware, or failover-aware redis client.

Type: string
Default: "simple"
Options: simple, cluster, failover.

master​

Name of the redis master when kind is failover

Type: string
Default: ""

# Examples

master: mymaster

tls​

Custom TLS settings can be used to override system defaults.

Troubleshooting

Some cloud hosted instances of Redis (such as Azure Cache) might need some hand holding in order to establish stable connections. Unfortunately, it is often the case that TLS issues will manifest as generic error messages such as "i/o timeout". If you're using TLS and are seeing connectivity problems consider setting enable_renegotiation to true, and ensuring that the server supports at least TLS version 1.2.

Type: object

tls.enabled​

Whether custom TLS settings are enabled.

Type: bool
Default: false

tls.skip_cert_verify​

Whether to skip server side certificate verification.

Type: bool
Default: false

tls.enable_renegotiation​

Whether to allow the remote server to repeatedly request renegotiation. Enable this option if you're seeing the error message local error: tls: no renegotiation.

Type: bool
Default: false
Requires version 1.0.0 or newer

tls.root_cas​

An optional root certificate authority to use. This is a string, representing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate.

Secret

This field contains sensitive information that usually shouldn't be added to a config directly, read our secrets page for more info.

Type: string
Default: ""

# Examples

root_cas: |-
  -----BEGIN CERTIFICATE-----
  ...
  -----END CERTIFICATE-----

tls.root_cas_file​

An optional path of a root certificate authority file to use. This is a file, often with a .pem extension, containing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate.

Type: string
Default: ""

# Examples

root_cas_file: ./root_cas.pem

tls.client_certs​

A list of client certificates to use. For each certificate either the fields cert and key, or cert_file and key_file should be specified, but not both.

Type: array
Default: []

# Examples

client_certs:
  - cert: foo
    key: bar

client_certs:
  - cert_file: ./example.pem
    key_file: ./example.key

tls.client_certs[].cert​

A plain text certificate to use.

Type: string
Default: ""

tls.client_certs[].key​

A plain text certificate key to use.

Secret

This field contains sensitive information that usually shouldn't be added to a config directly, read our secrets page for more info.

Type: string
Default: ""

tls.client_certs[].cert_file​

The path of a certificate to use.

Type: string
Default: ""

tls.client_certs[].key_file​

The path of a certificate key to use.

Type: string
Default: ""

tls.client_certs[].password​

A plain text password for when the private key is password encrypted in PKCS#1 or PKCS#8 format. The obsolete pbeWithMD5AndDES-CBC algorithm is not supported for the PKCS#8 format. Warning: Since it does not authenticate the ciphertext, it is vulnerable to padding oracle attacks that can let an attacker recover the plaintext.

Secret

This field contains sensitive information that usually shouldn't be added to a config directly, read our secrets page for more info.

Type: string
Default: ""

# Examples

password: foo

password: ${KEY_PASSWORD}

body_key​

The field key to extract the raw message from. All other keys will be stored in the message as metadata.

Type: string
Default: "body"

streams​

A list of streams to consume from.

Type: array

auto_replay_nacks​

Whether messages that are rejected (nacked) at the output level should be automatically replayed indefinitely, eventually resulting in back pressure if the cause of the rejections is persistent. If set to false these messages will instead be deleted. Disabling auto replays can greatly improve memory efficiency of high throughput streams as the original shape of the data can be discarded immediately upon consumption and mutation.

Type: bool
Default: true

limit​

The maximum number of messages to consume from a single request.

Type: int
Default: 10

client_id​

An identifier for the client connection.

Type: string
Default: ""

consumer_group​

An identifier for the consumer group of the stream.

Type: string
Default: ""

create_streams​

Create subscribed streams if they do not exist (MKSTREAM option).

Type: bool
Default: true

start_from_oldest​

If an offset is not found for a stream, determines whether to consume from the oldest available offset, otherwise messages are consumed from the latest offset.

Type: bool
Default: true

commit_period​

The period of time between each commit of the current offset. Offsets are always committed during shutdown.

Type: string
Default: "1s"

timeout​

The length of time to poll for new messages before reattempting.

Type: string
Default: "1s"