Utility to perform "virsh dump" for Openshift CNV guest workloads. It creates a dump file containing the core of the guest virtual machine so that it can be analyzed, for example by the crash utility.
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh --help
Usage: script <vm> [-n <namespace>] --pause|--dump [full|memory]|--capture_mode [dump|snapshot]|--list|--copy [filename]|--unpause
- oc
- virtctl
[root@ocp-stg-bastion cnv-vm-dump]# oc get vmi -n forensics-cnv
NAME AGE PHASE IP NODENAME
forensics-cnv-win10-0 16m Running 10.128.2.207 worker-0.redhat.com
[root@ocp-stg-bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --pause
VMI forensics-cnv-win10-0 was scheduled to pause
There are two options available:
- full - to perform complete VM dump (to include memory)
- memory - to perform memory VM dump only
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --dump memory --capture_mode dump
Dump: [100 %]
Domain forensics-cnv_forensics-cnv-win10-0 dumped to /var/run/kubevirt/external/forensics-cnv_forensics-cnv-win10-0/forensics-cnv_forensics-cnv-win10-0-20210331-145428.memory.dump
There are two options available:
- full - to perform complete VM dump (to include memory) *** NOT SUPPORTED ***
- memory - to perform memory VM dump only
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --dump memory --capture_mode snapshot
Dump: [100 %]
Domain forensics-cnv_forensics-cnv-win10-0 dumped to /var/run/kubevirt/external/forensics-cnv_forensics-cnv-win10-0/forensics-cnv_forensics-cnv-win10-0-20210331-145428.memory.snapshot
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --list
drwxr-xr-x. 2 root root 77 May 5 14:16 .
drwxr-xr-x. 3 root root 49 May 5 14:16 ..
-rw-------. 1 root root 4.1G May 5 14:16 forensics-cnv_forensics-cnv-win10-0-20210505-101625.memory.dump
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --copy forensics-cnv_forensics-cnv-win10-0-20210331-145428.memory.dump
Defaulting container name to compute.
tar: Removing leading `/' from member names
[root@bastion cnv-vm-dump]# ls
forensics-cnv_forensics-cnv-win10-0-20210331-145428.memory.dump
[root@bastion cnv-vm-dump]# ./cnv-vm-dump.sh -n forensics-cnv forensics-cnv-win10-0 --unpause
VMI forensics-cnv-win10-0 was scheduled to unpause