Incremental migration plan in Microservices - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the first step in an incremental migration plan.

Microservices

migration_steps = ['[1]', 'Build new services', 'Redirect traffic', 'Decommission old system']

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AAnalyze current system

BTest new services

CRedirect traffic

DDeploy new services

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing deployment or testing as the first step.

The first step is to analyze the current system to understand dependencies and components before migration.

2fill in blank

medium

Complete the code to describe the purpose of building new services in migration.

Microservices

purpose = 'To [1] functionality from the monolith into independent services'

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Adelay

Bremove

Ccombine

Dextract

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'combine' or 'remove' which do not fit the migration goal.

Building new services means extracting functionality from the monolith into smaller, independent services.

3fill in blank

hard

Fix the error in the migration step that redirects user traffic.

Microservices

def redirect_traffic(service):
    if service.status == 'ready':
        service.[1]('start')
    else:
        print('Service not ready')

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Aswitch

Bactivate

Cstop

Dredirect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'stop' or 'redirect' which are not valid methods here.

The correct method to start handling traffic is 'activate', which enables the new service to receive requests.

4fill in blank

hard

Fill both blanks to complete the code that checks service readiness and switches traffic.

Microservices

if service.[1]() and system.[2]('all_services_ready'):
    system.switch_traffic_to(service)

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Ais_ready

Bcheck_status

Cverify

Dis_active

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'verify' or 'is_active' which do not fit both blanks correctly.

Use 'is_ready()' to check if the service is ready and 'check_status' to verify system-wide readiness before switching traffic.

5fill in blank

hard

Fill all three blanks to complete the code that decommissions old services after migration.

Microservices

if service.[1]() and not system.[2](service) and service.[3] == 'inactive':
    system.decommission(service)

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Ais_deprecated

Bis_referenced

Cstatus

Dis_ready

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing readiness with deprecation or referencing.

The code checks if the service is deprecated, not referenced elsewhere, and has status 'inactive' before decommissioning.