You know nothing, Jon Snow! OpenStack troubleshooting from a beginner's perspective.
summary
Three real incidents and exact fixes: a VM unreachable on port 1521 turns out to be the service stopped (verify with telnet or /dev/tcp and start the service); a controller VM hangs at boot from a stale fstab mount (use the console, check dmesg/syslog and boot single user to remove the offending fstab line); intermittent block-device failures trace to mixed kernel/DPDK drivers on the same NIC (reproduce with iperf, observe packet drops and TX hang, apply vendor driver patches as the permanent fix).
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chapters (10)
- 0:00Introduction to troubleshooting
- 1:52Personal experience with OpenStack
- 4:00Three-step troubleshooting method
- 4:23First problem port connectivity
- 9:02Second problem controller reboot
- 11:48Third problem storage access
- 15:50Finding an OpenStack expert
- 16:54Investigating recurring issues
- 17:15Network interface driver conflict
- 20:35Closing remarks and thanks