Rollback strategies for failed updates in MLOps - Step-by-Step Execution

Process Flow - Rollback strategies for failed updates

Start Update Deployment

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Deploy New Version

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Run Health Checks

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Complete

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Restore Previous Version

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Verify Stability

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Complete

This flow shows deploying an update, checking if it works, and if it fails, rolling back to the previous stable version.

Execution Sample

MLOps

deploy_version('v2')
if health_check() == False:
    rollback('v1')
verify_stability()

Deploy version v2, check health, if failed rollback to v1, then verify system stability.

Process Table

Step	Action	Result	Next Step
1	Deploy version v2	Deployment started	Run health check
2	Run health check	Health check failed	Trigger rollback
3	Trigger rollback	Rollback to v1 started	Restore previous version
4	Restore previous version	Version v1 restored	Verify stability
5	Verify stability	System stable	Complete rollback
6	Complete rollback	Rollback successful, system stable	End

💡 Rollback completed because health check failed after deploying v2

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	Final
current_version	v1	v2	v2	v2	v1	v1	v1
health_status	unknown	unknown	failed	failed	stable	stable	stable
rollback_triggered	False	False	True	True	True	False	False

Key Moments - 3 Insights

Why do we rollback only after the health check fails?

Because the execution_table shows rollback triggers at Step 2 only if health check fails, ensuring we keep the new version if it's healthy.

What happens if the system is unstable after rollback?

The flow shows an alert and manual fix step if stability verification fails, but this example ends at stable verification (Step 5).

Does rollback change the current_version variable?

Yes, variable_tracker shows current_version changes back to v1 after rollback at Step 4.

Visual Quiz - 3 Questions

Look at the execution_table, what is the result of the health check at Step 2?

A Health check passed

B Health check failed

C Health check not run

D Health check unknown

💡 Hint

Check the 'Result' column in Step 2 of the execution_table

At which step does the rollback get triggered according to the execution_table?

A Step 3

B Step 2

C Step 1

D Step 4

💡 Hint

Look for 'Trigger rollback' action in the 'Action' column

According to variable_tracker, what is the value of rollback_triggered after Step 5?

A Unknown

B True

C False

D Not changed

💡 Hint

Check the 'rollback_triggered' row under 'After Step 5' and 'Final' columns

Concept Snapshot

Rollback Strategy Quick Guide:
- Deploy new version
- Run health checks
- If checks fail, trigger rollback
- Restore previous stable version
- Verify system stability
- Alert if rollback fails

Full Transcript

This visual execution shows how a rollback strategy works in MLOps. First, a new version is deployed. Then health checks run to confirm if the deployment is successful. If the health check fails, rollback is triggered to restore the previous stable version. After rollback, stability is verified to ensure the system is healthy again. If stable, the rollback completes successfully. If not, manual intervention is needed. Variables like current_version and rollback_triggered change accordingly during these steps.