Docker - Logging and Monitoring
You want to monitor multiple Docker hosts with Prometheus and cAdvisor. Which setup is best?
You want to monitor multiple Docker hosts with Prometheus and cAdvisor. Which setup is best?
hard📝 Workflow Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand cAdvisor scope
cAdvisor monitors containers on the host it runs on; to monitor multiple hosts, run cAdvisor on each host.Step 2: Configure Prometheus for multi-host scraping
Prometheus can scrape metrics from multiple cAdvisor instances by listing all hosts in its config.Step 3: Evaluate other options
Central cAdvisor cannot monitor other hosts; running Prometheus on each host complicates aggregation; single host setup misses other hosts.Final Answer:
Run cAdvisor on each host exposing metrics, configure Prometheus to scrape all hosts -> Option AQuick Check:
One cAdvisor per host + Prometheus scrape all = Run cAdvisor on each host exposing metrics, configure Prometheus to scrape all hosts [OK]
Quick Trick: One cAdvisor per host, Prometheus scrapes all [OK]
Common Mistakes:
- Thinking one cAdvisor can monitor all hosts
- Running multiple Prometheus instances unnecessarily
- Ignoring multi-host scraping config
Master "Logging and Monitoring" in Docker
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