Chapter 16. TCI - Debugging, Logging and Monitoring for Containerized Applications

Question 1

What are debugging, logging and monitoring tools with which we should be familiar with?

Answer 1

• strace
• SAR (System Activity Reporter)
• tcpdump
• GDB (GNU Project Debugger)
• syslog
• Nagios
• Zabbix

Question 2

What are additional challanges when it comes to debugging, monitoring and logging when it comes to containers?

Answer 2

• Containers are ephemeral, so, when deleted, all thei metadata including logs, gets deleted as well, unless stored elsewhere, in a possibly persistent storage location
• containers do not hvave kernel space components
• containers foodprint we want to be as small as possible, installing debugging and monitoring tools makes that nearly impossible
• collection per container statistics, debugging information individually, and then analyzing data from multiple containers is a tedious process

Question 3

What are Tools for Debugging, Logging, Monitoring in Kubernetes?

Answer 3

Kubernetes CLI for all three

Question 4

What is Sysdig?

Answer 4

• several tools for DevOps security for containers, Kubernetes and monitoring
• open source and paid offerings
• built to run in production, minimal overhead
• kubernetes-aware

Question 5

What is cAdvisor (Container Advisor)?

Answer 5

• open source tool to collect resource usage and performance characteristics for host system and running containers
• supports Docker and Kubernetes

Question 6

What is Elasticsearch?

Answer 6

• distributed search and analytics engine at core of Elastic Stack
• responsible for data indexing, search and analysis
• provides real-time search and analytics for structured or unstructured text, numerical data or geospatial data
• opitimized to efficiently store and index data in order to speed up the search process

Question 7

What is Datadog?

Answer 7

• platform for monitoring and analytics with integrated security as a service for DevOps
• wide array of tools
• enables monitoring the performance and security of the infrastructure, network devices, network performance, cloud workloads, databases, and entire continuous integration (CI) environment
• wide list of integrations

Question 8

Name a few additional products/Tools for monitoring/debugging/logging

Answer 8

• OpenTelemetry
• Prometheus
• Splunk
• Dynatrace