= redis_script :type: processor :status: beta :categories: ["Integration"] //// THIS FILE IS AUTOGENERATED! To make changes, edit the corresponding source file under: https://github.com/redpanda-data/connect/tree/main/internal/impl/. And: https://github.com/redpanda-data/connect/tree/main/cmd/tools/docs_gen/templates/plugin.adoc.tmpl //// // © 2024 Redpanda Data Inc. component_type_dropdown::[] Performs actions against Redis using https://redis.io/docs/manual/programmability/eval-intro/[LUA scripts^]. Introduced in version 4.11.0. [tabs] ====== Common:: + -- ```yml # Common config fields, showing default values label: "" redis_script: url: redis://:6379 # No default (required) script: return redis.call('set', KEYS[1], ARGV[1]) # No default (required) args_mapping: root = [ this.key ] # No default (required) keys_mapping: root = [ this.key ] # No default (required) ``` -- Advanced:: + -- ```yml # All config fields, showing default values label: "" redis_script: url: redis://:6379 # No default (required) kind: simple master: "" tls: enabled: false skip_cert_verify: false enable_renegotiation: false root_cas: "" root_cas_file: "" client_certs: [] script: return redis.call('set', KEYS[1], ARGV[1]) # No default (required) args_mapping: root = [ this.key ] # No default (required) keys_mapping: root = [ this.key ] # No default (required) retries: 3 retry_period: 500ms ``` -- ====== Actions are performed for each message and the message contents are replaced with the result. In order to merge the result into the original message compose this processor within a xref:components:processors/branch.adoc[`branch` processor]. == Examples [tabs] ====== Running a script:: + -- The following example will use a script execution to get next element from a sorted set and set its score with timestamp unix nano value. ```yaml pipeline: processors: - redis_script: url: TODO script: | local value = redis.call("ZRANGE", KEYS[1], '0', '0') if next(elements) == nil then return '' end redis.call("ZADD", "XX", KEYS[1], ARGV[1], value) return value keys_mapping: 'root = [ meta("key") ]' args_mapping: 'root = [ timestamp_unix_nano() ]' ``` -- ====== == Fields === `url` The URL of the target Redis server. Database is optional and is supplied as the URL path. *Type*: `string` ```yml # Examples url: redis://:6379 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*: `""` ```yml # 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 3.45.0 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. [CAUTION] ==== This field contains sensitive information that usually shouldn't be added to a config directly, read our xref:configuration:secrets.adoc[secrets page for more info]. ==== *Type*: `string` *Default*: `""` ```yml # 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*: `""` ```yml # 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*: `[]` ```yml # 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. [CAUTION] ==== This field contains sensitive information that usually shouldn't be added to a config directly, read our xref:configuration:secrets.adoc[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. Because the obsolete pbeWithMD5AndDES-CBC algorithm does not authenticate the ciphertext, it is vulnerable to padding oracle attacks that can let an attacker recover the plaintext. [CAUTION] ==== This field contains sensitive information that usually shouldn't be added to a config directly, read our xref:configuration:secrets.adoc[secrets page for more info]. ==== *Type*: `string` *Default*: `""` ```yml # Examples password: foo password: ${KEY_PASSWORD} ``` === `script` A script to use for the target operator. It has precedence over the 'command' field. *Type*: `string` ```yml # Examples script: return redis.call('set', KEYS[1], ARGV[1]) ``` === `args_mapping` A xref:guides:bloblang/about.adoc[Bloblang mapping] which should evaluate to an array of values matching in size to the number of arguments required for the specified Redis script. *Type*: `string` ```yml # Examples args_mapping: root = [ this.key ] args_mapping: root = [ meta("kafka_key"), "hardcoded_value" ] ``` === `keys_mapping` A xref:guides:bloblang/about.adoc[Bloblang mapping] which should evaluate to an array of keys matching in size to the number of arguments required for the specified Redis script. *Type*: `string` ```yml # Examples keys_mapping: root = [ this.key ] keys_mapping: root = [ meta("kafka_key"), this.count ] ``` === `retries` The maximum number of retries before abandoning a request. *Type*: `int` *Default*: `3` === `retry_period` The time to wait before consecutive retry attempts. *Type*: `string` *Default*: `"500ms"`