HackMD
Tech Skills
Linux
Troubleshooting user cannot login issue:
Invesitgation from :
- sssd, pam, nofile (limitation setup), ldap
- HDD broken
- service broken
- network connection
Troubleshooting DNS issues:
- Truncate
- DNS route (dig, tcpdump trace package)
- Zone management
Filesystem:
- have study on filesystem : inode, superblock…etc
Openstack:
- Deployed a server via openstack client
- Status check on baremetal and server instance.
- Basic troubleshooting on openstack: remove faulty instance, list error logs.
Others:
- Uderstand certification configuration.
- Use vim as default editor
- Qemu and kvm
Ansible
- Dealing with legacy ansible code with 2 repo and 20+ yaml files, extracted necessry files and provide a interface to simplify operations.
- Able to deal with old ansible playbook 2.9.7+
- Able to implement ansible playbook from scratch (2.12+)
- Trcaing ansible builtin module (copy, move..etc)
- My answer on stack overflow: https://stackoverflow.com/questions/24851575/ansible-how-to-pass-multiple-commands/62566158#62566158
Docker
- Basic docker operation (run, volumn, netwrok, exec and image)
- Understand multi-layer build to reduce image size
- Build integration test and local dev env with docker-compose
- Have a study on namespace, understand docker vs VM.
- Have experience on overlay filesystem.
- Use ansible to deploy docker containers.
