How would you combine CPU limits with memory limits in a Docker Compose file to ensure a service uses at most 1 CPU and 512MB RAM, but reserves 0.5 CPU?

hard📝 Application Q9 of 15

Docker - Resource Management

Aservices:\n app:\n image: myapp\n deploy:\n resources:\n limits:\n cpus: '1.0'\n memory: 512M\n reservations:\n cpus: '0.5'\n memory: 256M

Bservices:\n app:\n image: myapp\n cpu_limit: 1\n cpu_reservation: 0.5\n mem_limit: 512M

Cservices:\n app:\n image: myapp\n deploy:\n cpu: 1\n memory: 512M

Dservices:\n app:\n image: myapp\n resources:\n cpus: 1\n memory: 512M

Step-by-Step Solution

Solution:

Step 1: Use Docker Compose deploy resources syntax
CPU and memory limits and reservations are set under deploy.resources with limits and reservations.
Step 2: Check option values and format
services:\n app:\n image: myapp\n deploy:\n resources:\n limits:\n cpus: '1.0'\n memory: 512M\n reservations:\n cpus: '0.5'\n memory: 256M correctly sets CPU limits to 1, memory limits to 512M, CPU reservation to 0.5, and memory reservation to 256M (optional).
Final Answer:
Option A with deploy.resources limits and reservations correctly set. -> Option A
Quick Check:
Use deploy.resources with limits and reservations [OK]

Quick Trick: Set CPU and memory limits and reservations under deploy.resources [OK]

Common Mistakes:

Using invalid keys like cpu_limit in Compose
Omitting deploy.resources section
Incorrect YAML indentation

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How would you combine CPU limits with memory limits in a Docker Compose file to ensure a service uses at most 1 CPU and 512MB RAM, but reserves 0.5 CPU?

Step 1: Use Docker Compose deploy resources syntax

Step 2: Check option values and format

Final Answer:

Quick Check:

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