On 03.10.2015 00:07, poma wrote:> Hi Fi,
>
> cmdline: console=hvc0 systemd.wants=getty at hvc0
>
> Connect via virt-manager - View / Text Consoles / Text Console no.:
>
> Fedora 24 (Rawhide)
> Kernel 4.3.0-0.rc3.git2.4.fc24.x86_64 on an x86_64 (hvc0)
>
> localhost login: root
> Last login: Fri Oct 2 17:28:36 on hvc0
> # tty
> /dev/hvc0
> # systemctl status getty at hvc0.service
> ? getty at hvc0.service - Getty on hvc0
> Loaded: loaded (/usr/lib/systemd/system/getty at .service; enabled;
vendor preset: enabled)
> Active: active (running) since Fri 2015-10-02 17:28:39 EDT; 26s ago
> Docs: man:agetty(8)
> man:systemd-getty-generator(8)
> http://0pointer.de/blog/projects/serial-console.html
> Main PID: 2034 (login)
> CGroup: /system.slice/system-getty.slice/getty at hvc0.service
> ? 2034 login -- root
>
> Oct 02 17:28:39 localhost systemd[1]: Started Getty on hvc0.
>
> It obviously works.
>
>
> Connect via virsh:
>
> # virsh console <domain> console1
> Connected to domain <domain>
> Escape character is ^]
> error: operation failed: Active console session exists for this domain
>
> # virsh console --devname console1 <domain>
> Connected to domain <domain>
> Escape character is ^]
> error: operation failed: Active console session exists for this domain
>
> Obviously does not work.
>
> Is it possible to connect hvc via virsh, if domain/guest is started with
the virt-manager?
> Is it possible at all, to connect hypervisor virtual console via virsh?
>
The answer is, of course!
Connect via virt-manager - View / Text Consoles / Text Console 1:
Fedora 24 (Rawhide)
Kernel 4.3.0-0.rc3.git2.4.fc24.x86_64 on an x86_64 (hvc0)
localhost login: root
# tty
/dev/hvc0
# cat /proc/cmdline
BOOT_IMAGE=vmlinuz0 initrd=initrd0.img root=live:CDLABEL=Rawhide-Xfce-Live-1001
rootfstype=auto ro rd.live.image console=hvc0 systemd.wants=getty at hvc0
console=hvc1 systemd.wants=getty at hvc1
Connect via virsh to "Text Console 2":
# virsh console <domain> console0
Connected to domain <domain>
Escape character is ^]
error: operation failed: Active console session exists for this domain
- This console is obviously busy!
# virsh console <domain> console1
Connected to domain <domain>
Escape character is ^]
Fedora 24 (Rawhide)
Kernel 4.3.0-0.rc3.git2.4.fc24.x86_64 on an x86_64 (hvc1)
localhost login: root
Last login: Fri Oct 2 18:41:46 on hvc0
# tty
/dev/hvc1
Conclusion:
It is necessary to shutdown domain/guest and disconnect from hypervisor, after
the connection established via virt-manager, to free up a slot for next
connection, via virsh.
And vice versa.
Even better is if defined more "Text Consoles" i.e. hypervisor virtual
consoles, as shown here.