OpenStack Console log is Empty

Problem

The console log within the instance storage directory as well as the output of the following command is empty.

None

# openstack console log show [VM_UUID]

Environment

• Platform9 Managed OpenStack - All versions.

• Nova

• Grub

Cause

This occurs when the compute service attempts to retrieve the log output of the instance via a serial console while the instance itself is not configured to send output to the console.

Resolution

1. Find the default grub configuration within an instance by running the following command.

None

$ cat /etc/default/grubGRUB_DEFAULT=0GRUB_TIMEOUT_STYLE=hiddenGRUB_TIMEOUT=0GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`GRUB_CMDLINE_LINUX="apparmor=1 security=apparmor audit=1 audit_backlog_limit=8192"

1. Add the following highlighted line to the /etc/default/grub file.

None

GRUB_DEFAULT=0GRUB_TIMEOUT_STYLE=hiddenGRUB_TIMEOUT=0GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200"GRUB_CMDLINE_LINUX="apparmor=1 security=apparmor audit=1 audit_backlog_limit=8192"

1. Update grub.

None

# sudo update-grub

Additional Information

Since the above actions will only correct a single instance, please make sure the correct configuration is set when OpenStack images are created.