Rolling updates in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to update a service with a rolling update in Docker Swarm.

Docker

docker service update --[1] my_service

Drag options to blanks, or click blank then click option'

Apublish

Bupdate-parallelism

Creplicas

Drollback

Attempts:

3 left

💡 Hint

Common Mistakes

Using --rollback instead of --update-parallelism

Confusing --replicas with update control

The --update-parallelism flag controls how many tasks are updated simultaneously during a rolling update.

2fill in blank

medium

Complete the command to set the delay between updating each task during a rolling update.

Docker

docker service update --update-[1] 10s my_service

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Adelay

Bfailure-action

Cparallelism

Dmonitor

Attempts:

3 left

💡 Hint

Common Mistakes

Using --update-parallelism instead of delay

Confusing delay with monitor

The --update-delay flag sets the wait time between updating each task in the rolling update.

3fill in blank

hard

Fix the error in the command to rollback a service to the previous version.

Docker

docker service [1] my_service

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Ascale

Bupdate

Crestart

Drollback

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'update' instead of 'rollback'

Using 'restart' which only restarts containers

The rollback command reverts the service to the previous version in Docker Swarm.

4fill in blank

hard

Fill both blanks to create a command that updates a service with a max failure ratio.

Docker

docker service update --update-max-failure-[1] [2] my_service

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Aratio

B0.2

C0.5

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'timeout' instead of 'ratio' for failure control

Setting failure ratio above 1

The --update-max-failure-ratio flag sets the maximum allowed failure ratio during update. Here, 0.2 means 20% failures allowed before stopping.

5fill in blank

hard

Fill all three blanks to update a service with parallelism 2, delay 5s, and monitor 15s.

Docker

docker service update --update-parallelism [1] --update-delay [2] --update-[3] 15s my_service

Drag options to blanks, or click blank then click option'

A2

B5s

Cmonitor

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'timeout' with 'monitor'

Using wrong time units for delay or monitor

This command sets the update parallelism to 2 tasks at once, waits 5 seconds between updates, and monitors for 15 seconds after each update.