by Rob Locke (Red Hat)
One of the new features introduced in version 3.1 of Red Hat Enterprise Virtualization is a command line interface (CLI) to connect to the manager. The CLI also contains a scripting system, which helps system administrators perform periodic maintenance or repetitive tasks on their virtualization environment.
Communication with the RHEV Manager is secured through the use of a certificate that needs to be downloaded from the manager:
$ wget http://rhevm.pod0.example.com/ca.crt
Connect to the RHEV Manager using the rhevm-shell command (referring to the downloaded certificate):
$ rhevm-shell -l https://rhevm.pod0.example.com/api \ -u firstname.lastname@example.org -A ca.crt -c Password: redhat ... output omitted ... [RHEVM shell (connected)]#
There are numerous subcommands that can be specified at the rhevm-shell prompt. Use help for a list of subcommands, then help subcommand to see what can be done:
[RHEVM shell (connected)]# help ... output omitted ... [RHEVM shell (connected)]# help action ... output omitted ...
Those rhevm-shell subcommands can be entered interactively from the prompt above or embedded in a text file for automation from a standard shell prompt:
$ cat /tmp/rhel0.shutdown action vm rhel0 shutdown exit $ rhevm-shell -l https://rhevm.pod0.example.com/api \ -u email@example.com -A ca.crt -f /tmp/rhel0.shutdown -c Password: redhat
Learn more about rhevm-shell and other methods of automation in our updated Red Hat Enterprise Virtualization (RH318) course.
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