In this post we will go through top 15 runtime issues you might face in managing docker containers. Re-create those issues on your docker environment , debug step by step and resolve them.
For this i have created a Github repo which got a docker-compose file which will re-create the issue and a README file which will describe what exactly the issue we created, and step by step guide to debug the issue, and how to fix it. We got 15 folders one for each runtime issue.
Github Repo : https://github.com/pratappilaka24/Top-15-Docker-Runtime-Issues
Below are the Runtime issues we will be looking at.
- OOM (Out-of-Memory) Killer
- CPU Throttling
- Disk IO Exhaustion
- DNS Resolution Failure
- Volume Permission Denied
- Port Binding Conflicts
- Health Check & Restart Loops
- Docker Socket Exposure
- Zombie Processes
- Container Logs Exhaustion
- Network MTU Mismatch
- Environment Variable Secret Leakage
- Timezone Mismatch Inside Containers
- Open File Limit Exhaustion
- SELinux Blocking Container Operations
I have a RHEL 10 vm which i am using as host and mounted the shared drive with all the samples on it.
Lets start recreating the runstime issues one by one.
