Implementation:SeldonIO Seldon core Seldon Pipeline Version Update

Property	Value
Implementation Name	Seldon Pipeline Version Update
Type	Pattern Doc
Overview	Concrete pattern for progressively evolving Seldon Core 2 pipelines through version updates
Domains	MLOps, Versioning
Implements Principle	SeldonIO_Seldon_core_Pipeline_Version_Progression
Source	samples/pipelines/income-v1.yaml:L1-10, samples/pipelines/income-v2.yaml:L1-14, samples/pipelines/income-v3.yaml:L1-18
External Dependencies	seldon CLI, kubectl, Seldon scheduler
Knowledge Sources	Repo (https://github.com/SeldonIO/seldon-core), Doc (https://docs.seldon.io/projects/seldon-core/en/v2/)
Last Updated	2026-02-13 00:00 GMT

Code Reference

Version 1: Classifier Only

# income-v1.yaml
apiVersion: mlops.seldon.io/v1alpha1
kind: Pipeline
metadata:
  name: income-prod
spec:
  steps:
    - name: income
  output:
    steps:
    - income

Version 2: Classifier + Drift Detection

# income-v2.yaml
apiVersion: mlops.seldon.io/v1alpha1
kind: Pipeline
metadata:
  name: income-prod
spec:
  steps:
    - name: income
    - name: income-drift
      batch:
        size: 20
  output:
    steps:
    - income

Version 3: Full Monitoring Pipeline

# income-v3.yaml
apiVersion: mlops.seldon.io/v1alpha1
kind: Pipeline
metadata:
  name: income-prod
spec:
  steps:
    - name: income
    - name: income-preprocess
    - name: income-outlier
      inputs:
      - income-preprocess
    - name: income-drift
      batch:
        size: 20
  output:
    steps:
    - income
    - income-outlier.outputs.is_outlier

Key Parameters

Version	Pipeline Name	Steps	New Additions	Output Steps
v1	income-prod	income	Classifier only	income
v2	income-prod	income, income-drift	+ drift detector with batch.size=20	income
v3	income-prod	income, income-preprocess, income-outlier, income-drift	+ preprocessor, + outlier detector with input chaining	income, income-outlier.outputs.is_outlier

Version Progression Details

Change	v1 to v2	v2 to v3
New steps added	income-drift	income-preprocess, income-outlier
New dependencies	None	income-outlier depends on income-preprocess
Batch configuration	N/A	income-drift: batch.size=20 (unchanged)
Output changes	None	Added income-outlier.outputs.is_outlier
Pipeline name	income-prod (same)	income-prod (same)

I/O Contract

Inputs

Input	Type	Description
Updated pipeline YAML	File	Pipeline CRD with additional monitoring steps (same pipeline name)
Component models	Pre-deployed	All referenced models must be loaded before pipeline update

Outputs

Output	Type	Description
Pipeline version increment	State change	pipelineVersion increments (1, 2, 3, ...)
Seamless transition	Behavior	No downtime during version transitions
New Kafka topics	Auto-created	Topics for new steps are provisioned automatically

Usage Examples

Progressive Deployment Sequence

# Step 1: Deploy v1 (classifier only)
seldon pipeline load -f samples/pipelines/income-v1.yaml
seldon pipeline status income-prod -w PipelineReady
# Pipeline version: 1

# Step 2: Validate v1 with inference
seldon pipeline infer income-prod \
  '{"inputs": [{"name": "predict", "datatype": "FP32", "shape": [1, 12], "data": [[39,7,1,1,1,1,4,1,2174,0,40,9]]}]}'

# Step 3: Upgrade to v2 (add drift detection)
seldon pipeline load -f samples/pipelines/income-v2.yaml
seldon pipeline status income-prod -w PipelineReady
# Pipeline version: 2

# Step 4: Upgrade to v3 (add preprocessing + outlier detection)
seldon pipeline load -f samples/pipelines/income-v3.yaml
seldon pipeline status income-prod -w PipelineReady
# Pipeline version: 3

Rolling Back to a Previous Version

# Roll back from v3 to v1 by resubmitting the v1 definition
seldon pipeline load -f samples/pipelines/income-v1.yaml
seldon pipeline status income-prod -w PipelineReady
# Pipeline version: 4 (new version number, but v1 functionality)

Verifying Version After Update

# Check current pipeline version and steps
seldon pipeline status income-prod | jq '.versions[0].state.pipelineVersion'
# Output: 3

# List all steps in current version
seldon pipeline status income-prod | jq '.versions[0].pipeline.steps | keys'
# Output: ["income", "income-drift", "income-outlier", "income-preprocess"]

Related Pages

• SeldonIO_Seldon_core_Pipeline_Version_Progression (principle) - Progressive pipeline evolution principles
• SeldonIO_Seldon_core_Seldon_Pipeline_CRD_Monitoring (related) - Full monitoring pipeline CRD (equivalent to v3)
• SeldonIO_Seldon_core_Seldon_Pipeline_Load_And_Status (tool) - CLI tools used for loading and validating each version
• SeldonIO_Seldon_core_Seldon_Model_Load_For_Monitoring (prerequisite) - Component models must be deployed before pipeline updates
• SeldonIO_Seldon_core_Seldon_Pipeline_Infer_Monitoring (validation) - Sending inference requests to validate each version
• Environment:SeldonIO_Seldon_core_Kafka_Messaging_Environment