Update

Signed-off-by: SpiritZhou <[email protected]>

content/docs/2.17/operate/schema.md

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+title = "Schema"
+description = "Specification & generation of KEDA scalers' schema"
+weight = 100
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+
+## Scaler Schema
+
+KEDA provides a separate scaler's schema for third-party usage. The schema file will keep updating according to the scaler's refactor.
+
+## Specification
+
+Here is a the schema of the scalers:
+
+```
+kedaVersion: main 
+schemaVersion: 1
+scalers:
+    - type: activemq
+      metadata:
+        - name: managementEndpoint
+          type: string
+          optional: true
+        - name: destinationName
+          type: string
+          optional: true
+        - name: brokerName
+          type: string
+          optional: true
+        - name: username
+          type: string
+          canReadFromEnv: true
+          canReadFromAuth: true
+        - name: password
+          type: string
+          canReadFromEnv: true
+          canReadFromAuth: true
+        - name: corsHeader
+          type: string
+          optional: true
+        - name: restAPITemplate
+          type: string
+          optional: true
+        - name: targetQueueSize
+          type: string
+          optional: true
+          default: "10"
+        - name: activationTargetQueueSize
+          type: string
+          optional: true
+          default: "0"
+    - type: apache-kafka
+      metadata:
+        - name: bootstrapServers
+        ...
+
+```
+
+**Metadata field's property detail:**
+| Property  | Description 
+|--------------|------------
+| name         | the name of the field
+| type         | type is the variable type of the field
+| optional     | optional is a boolean that indicates if the field is optional
+| default      | default is the default value of the field 
+| allowedValue | allowedValue is a list of allowed values for the field
+| deprecated   | deprecated is a string that indicates if the field is deprecated
+| deprecatedAnnounce | deprecatedAnnounce is a string that indicates the deprecation message
+| separator | separator is the symbol that separates the value of the field if the value is a list string
+| exclusiveSet | exclusiveSet is a list of fields that are exclusive with the field
+| rangeSeparator | rangeSeparator is the symbol that indicates the range of the field
+| canReadFromEnv | canReadFromEnv is a boolean that indicates if the field can be read from the environment
+| canReadFromAuth | canReadFromAuthis a boolean that indicates if the field can be read from the TriggerAuthentication
+
+## Generation
+
+There are two ways to generate scaler schemas:
+
+1. Run the GO file in the schema folder directly
+```
+go run schema/generate_scaler_schema.go
+parameters:
+  --keda-version string                Set the version of current KEDA in schema. (default "1.0")
+  --kubeconfig string                  Paths to a kubeconfig. Only required if out-of-cluster.
+  --output-file-path string            scaler-metadata-schemas.yaml output file path. (default "./")
+  --scalers-builder-file buildScaler   The file that exists buildScaler func. (default "../pkg/scaling/scalers_builder.go")
+  --scalers-files-dir string           The directory that exists all scalers' files. (default "../pkg/scalers")
+  --specify-scaler string              Specify scaler name.
+```
+
+2. Use makefile
+```
+make  generate-scaler-schemas
+env variables:
+    OUTPUT_FILE_PATH          scaler-metadata-schemas.yaml output file path. (default "./")
+    SCALERS_BUILDER_FILE   The file that exists buildScaler func. (default "../pkg/scaling/scalers_builder.go")
+    SCALERS_FILES_DIR           The directory that exists all scalers' files. (default "../pkg/scalers")
+```
+
+ SCALERS_BUILDER_FILE ?= "pkg/scaling/scalers_builder.go" 
+ SCALERS_FILES_DIR ?= "pkg/scalers" 
+ OUTPUT_FILE_PATH ?= "schema/"
+## Supported Scaler
+
+| Scaler  |
+| ------  |
+|activemq
+|apache-kafka
+|arangodb
+|aws-cloudwatch
+|aws-dynamodb
+|aws-dynamodb-streams
+|aws-kinesis-stream
+|aws-sqs-queue
+|etcd
+|gcp-cloudtasks
+|ibmmq
+|influxdb
+|kubernetes-workload
+|nsq
+|postgresql
+|predictkube
+|prometheus
+|rabbitmq
+|redis-sentinel
+|redis
+|redis-cluster
+|redis-cluster-streams
+|redis-sentinel-streams
+|redis-streams
+|selenium-grid
+|solace-event-queue
+|solr
+|splunk
+
+