redis_streams
Pushes messages to a Redis (v5.0+) Stream (which is created if it doesn't already exist) using the XADD command.
- Common
- Advanced
# Common config fields, showing default values
output:
label: ""
redis_streams:
url: redis://:6397 # No default (required)
stream: "" # No default (required)
body_key: body
max_length: 0
max_in_flight: 64
metadata:
exclude_prefixes: []
batching:
count: 0
byte_size: 0
period: ""
check: ""
# All config fields, showing default values
output:
label: ""
redis_streams:
url: redis://:6397 # No default (required)
kind: simple
master: ""
tls:
enabled: false
skip_cert_verify: false
enable_renegotiation: false
root_cas: ""
root_cas_file: ""
client_certs: []
stream: "" # No default (required)
body_key: body
max_length: 0
max_in_flight: 64
metadata:
exclude_prefixes: []
batching:
count: 0
byte_size: 0
period: ""
check: ""
processors: [] # No default (optional)
It's possible to specify a maximum length of the target stream by setting it to a value greater than 0, in which case this cap is applied only when Redis is able to remove a whole macro node, for efficiency.
Redis stream entries are key/value pairs, as such it is necessary to specify the key to be set to the body of the message. All metadata fields of the message will also be set as key/value pairs, if there is a key collision between a metadata item and the body then the body takes precedence.
Performance
This output benefits from sending multiple messages in flight in parallel for improved performance. You can tune the max number of in flight messages (or message batches) with the field max_in_flight
.
This output benefits from sending messages as a batch for improved performance. Batches can be formed at both the input and output level. You can find out more in this doc.
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.
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.
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.
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}
stream
The stream to add messages to. This field supports interpolation functions.
Type: string
body_key
A key to set the raw body of the message to.
Type: string
Default: "body"
max_length
When greater than zero enforces a rough cap on the length of the target stream.
Type: int
Default: 0
max_in_flight
The maximum number of messages to have in flight at a given time. Increase this to improve throughput.
Type: int
Default: 64
metadata
Specify criteria for which metadata values are included in the message body.
Type: object
metadata.exclude_prefixes
Provide a list of explicit metadata key prefixes to be excluded when adding metadata to sent messages.
Type: array
Default: []
batching
Allows you to configure a batching policy.
Type: object
# Examples
batching:
byte_size: 5000
count: 0
period: 1s
batching:
count: 10
period: 1s
batching:
check: this.contains("END BATCH")
count: 0
period: 1m
batching.count
A number of messages at which the batch should be flushed. If 0
disables count based batching.
Type: int
Default: 0
batching.byte_size
An amount of bytes at which the batch should be flushed. If 0
disables size based batching.
Type: int
Default: 0
batching.period
A period in which an incomplete batch should be flushed regardless of its size.
Type: string
Default: ""
# Examples
period: 1s
period: 1m
period: 500ms
batching.check
A Bloblang query that should return a boolean value indicating whether a message should end a batch.
Type: string
Default: ""
# Examples
check: this.type == "end_of_transaction"
batching.processors
A list of processors to apply to a batch as it is flushed. This allows you to aggregate and archive the batch however you see fit. Please note that all resulting messages are flushed as a single batch, therefore splitting the batch into smaller batches using these processors is a no-op.
Type: array
# Examples
processors:
- archive:
format: concatenate
processors:
- archive:
format: lines
processors:
- archive:
format: json_array