Container metrics collection in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to list all running Docker containers.

Docker

docker [1]

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

Astart

Brun

Cps

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker run' instead of 'docker ps' to list containers.

Using 'docker start' which starts a stopped container but does not list them.

The docker ps command lists all running containers.

2fill in blank

medium

Complete the command to show real-time stats of all running containers.

Docker

docker [1]

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Astats

Blogs

Cinspect

Dtop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker logs' which shows container logs, not metrics.

Using 'docker inspect' which shows detailed info but not live stats.

The docker stats command shows live metrics like CPU and memory usage for running containers.

3fill in blank

hard

Fix the error in the command to get stats for a specific container named 'webapp'.

Docker

docker stats [1]

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Awebapp

B--name webapp

C-container webapp

Dcontainer webapp

Attempts:

3 left

💡 Hint

Common Mistakes

Adding unnecessary flags like '--name' which is not valid here.

Using incorrect flags like '-container' or 'container' which cause errors.

To get stats for a specific container, just provide its name or ID after docker stats.

4fill in blank

hard

Fill both blanks to create a command that outputs container stats in JSON format and limits output to 5 updates.

Docker

docker stats --format '[1]' --no-stream --[2] 5

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A"{{.Name}}: CPU {{.CPUPerc}}, Mem {{.MemUsage}}"

Bstream

Climit

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using '--json' which is not a valid flag for docker stats.

Using '--limit' which is not a recognized option.

The --format option customizes output, and --no-stream shows a single snapshot instead of continuous updates.

5fill in blank

hard

Fill all three blanks to create a command that filters stats for containers with names starting with 'db' and outputs only CPU percentage.

Docker

docker stats --format '{{{{.Name}}}}: {{{{.[1]' --filter name=[2] --no-stream | grep '^[3]'

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

ACPUPerc

Bdb

DMemUsage

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'MemUsage' instead of 'CPUPerc' for CPU stats.

Not using the correct filter syntax for container names.

The --filter name=db limits containers to those starting with 'db'. The format outputs CPU percentage. The grep filters lines starting with 'db'.