Notes

The notes are a collection of things that do not fit well into the other sections and chapters. Anything can be added here that has been found useful in an OSISM environment.

Especially some obscure error messages for which you had to search for a long time and which was not easy to find.

Any hints that might save another operator’s day are right here.

• Ansible
  • Read facts from cache
  • Found variable using reserved name
  • dict object has no attribute
• Cleanup
  • warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
  • TMOUT: readonly variable
  • unknown item ‘FAIL_DELAY’
  • OPENSTACK-ANSIBLE-SECURITY block in /etc/ssh/sshd_config
• Generic
  • Tunnel internal networks via SSH with sshuttle
  • Does a system support IPMI
  • Spectre & Meltdown
  • Deleting all partitions
  • ssh: Too many authentication failures
• Networking
  • iproute2
  • MAC VLAN
• OpenStack
  • Debugging services
  • Nested virtualisation
  • Support of QCOW2 images
  • Performance tweaks via image extra properties
  • Virtio SCSI
  • Virtio Multiqueuing
  • OS/distribution type
  • Empty action list in Mistral
  • RPCVersionCapError
  • Instance Allocation
  • Ironic
• SuperMicro
  • Copy & paste in the iKVM remote console
  • Reset IPMI password
  • Configure and mount Samba share
  • Application Blocked by Java Security
  • Use of old Java iKVM Viewer with current JRE version
• Troubleshooting
  • sudo: unknown uid 42401: who are you?
  • refusing to convert from file to symlink for /etc/resolv.conf
• Ubuntu
  • Hold packages