6:59 a.m.
First, i'm appreciate to your hard work.
i have a question for using virt-{X} commands (virt-customize, virt-cat and so on...).
Is there any way to connect RBD storage including keyring for using virt-X commands?
it seems possible with `guestfish add`, but i could not find out with -a option.
https://libguestfs.org/guestfish.1.html#adding-remote-storage
(ex. -a rbd://example.com[:port]/pool/disk)
i tried hard, but switching virt-X commands to `guestfish` is so difficult.
- like `virt-customize`
virt-customize --hostname -> guestfish add pool/image protocol:rbd
username:admin server:example.com:1234 secret:{keyring} : run : mount ~~~ : write
/etc/hostname ~~~)
If there is a way, I would appreciate it if you could let me know.
Thanks
10:46 a.m.
New subject: virt-{X} command support Ceph RBD keyring authentication
On Fri, Aug 09, 2024 at 11:59:45AM -0000, brownie4597(a)gmail.com wrote:
First, i'm appreciate to your hard work.
i have a question for using virt-{X} commands (virt-customize, virt-cat and so on...).
Is there any way to connect RBD storage including keyring for using virt-X commands?
it seems possible with `guestfish add`, but i could not find out with -a option.
https://libguestfs.org/guestfish.1.html#adding-remote-storage
(ex. -a rbd://example.com[:port]/pool/disk)
rbd://... URIs should be supported by virt-customize. However I kind
of doubt that anyone has ever tested them. Also this doesn't pass the
secret along. You could try it anyhow:
virt-customize -a rbd://... --hostname ...
If libvirt knows about the guest, then an alternative is to use the -d
option with the libvirt guest name. Again in theory this should just
set up the disks (with the secret?), although I doubt anyone tried it.
i tried hard, but switching virt-X commands to `guestfish` is so
difficult.
- like `virt-customize`
> virt-customize --hostname -> guestfish add pool/image protocol:rbd username:admin
server:example.com:1234 secret:{keyring} : run : mount ~~~ : write /etc/hostname ~~~)
If there is a way, I would appreciate it if you could let me know.
Thanks
One thing that might help is to run virt-customize with the -x option
(but not -v), which will print the libguestfs calls being made.
You'll see that virt-customize high level commands translate in some
cases into a lot of low level calls. But some virt-customize commands
are actually quite trivial.
For example, setting a hostname on a test image:
$ virt-builder fedora-39
$ virt-customize -a fedora-39.img -x --hostname foobar
...
libguestfs: trace: write "/etc/hostname" "foobar\x0a"
...
The key guestfish command here is just the 'write'. So
the guestfish equivalent would be:
$ guestfish
<fs> add pool/image protocol:rbd username:admin
server:example.com:1234 secret:{keyring}
<fs> run
<fs> [mount up the disks]
<fs> write "/etc/hostname" "foobar\n"
<fs> exit
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org
12:04 a.m.
Dear Richard,
Thank you for taking the time to reply to me.
i have tested with "-x" option, but i cannot connect to Ceph Cluster.
like this,
root@kvm-test-host:/home/test# virt-customize -x -a rbd://
1.2.3.4:3300/test/test-base-img --hostname abc
[ 0.0] Examining the guest ...
libguestfs: trace: set_network true
libguestfs: trace: set_network = 0
libguestfs: trace: add_drive "test/test-base-img" "readonly:false"
"protocol:rbd" "server:tcp:1.2.3.4:3300"
"discard:besteffort"
libguestfs: trace: add_drive = 0
libguestfs: trace: launch
libguestfs: trace: max_disks
libguestfs: trace: max_disks = 255
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: trace: get_backend_setting "force_tcg"
libguestfs: trace: get_backend_setting = NULL (error)
libguestfs: trace: get_backend_setting "force_kvm"
libguestfs: trace: get_backend_setting = NULL (error)
libguestfs: trace: get_sockdir
libguestfs: trace: get_sockdir = "/tmp"
libguestfs: trace: get_backend_setting "gdb"
libguestfs: trace: get_backend_setting = NULL (error)
libguestfs: trace: launch = -1 (error)
virt-customize: error: libguestfs error: guestfs_launch failed.
This usually means the libguestfs appliance failed to start or crashed.
Do:
export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1
and run the command again. For further information, read:
http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs
You can also run 'libguestfs-test-tool' and post the *complete* output
into a bug report or message to the libguestfs mailing list.
If reporting bugs, run virt-customize with debugging enabled and include
the complete output:
virt-customize -v -x [...]
libguestfs: trace: close
Actually, my question was
how to pass the secret of ceph storage as a parameter
when using uri pattern as follows.
virt-customize -x -a rbd://1.2.3.4:3300/test/test-base-img
add_drive "test/test-base-img" "readonly:false"
"protocol:rbd" "server:tcp:
1.2.3.4:3300" "discard:besteffort"
(how can i pass parameter "secret:{keyring}", "username:admin" in uri
pattern?)
i'm using qemu binary directly (qemu-system-x86_64) for using a VM
instance, not through libvirt.
So if I use libvirt,
I expect it will take a long time to set up the VM because i have to add a
domain to libvirtd.
Thanks.
2024년 8월 10일 (토) 오전 12:46, Richard W.M. Jones <rjones(a)redhat.xn--com>-4f21ay07k 작성:
On Fri, Aug 09, 2024 at 11:59:45AM -0000, brownie4597(a)gmail.com
wrote:
> First, i'm appreciate to your hard work.
> i have a question for using virt-{X} commands (virt-customize, virt-cat
and so on...).
>
> Is there any way to connect RBD storage including keyring for using
virt-X commands?
>
> it seems possible with `guestfish add`, but i could not find out with -a
option.
> https://libguestfs.org/guestfish.1.html#adding-remote-storage
> (ex. -a rbd://example.com[:port]/pool/disk)
rbd://... URIs should be supported by virt-customize. However I kind
of doubt that anyone has ever tested them. Also this doesn't pass the
secret along. You could try it anyhow:
virt-customize -a rbd://... --hostname ...
If libvirt knows about the guest, then an alternative is to use the -d
option with the libvirt guest name. Again in theory this should just
set up the disks (with the secret?), although I doubt anyone tried it.
> i tried hard, but switching virt-X commands to `guestfish` is so
difficult.
> - like `virt-customize`
> > virt-customize --hostname -> guestfish add pool/image protocol:rbd
username:admin server:example.com:1234 secret:{keyring} : run : mount ~~~
: write /etc/hostname ~~~)
>
> If there is a way, I would appreciate it if you could let me know.
> Thanks
One thing that might help is to run virt-customize with the -x option
(but not -v), which will print the libguestfs calls being made.
You'll see that virt-customize high level commands translate in some
cases into a lot of low level calls. But some virt-customize commands
are actually quite trivial.
For example, setting a hostname on a test image:
$ virt-builder fedora-39
$ virt-customize -a fedora-39.img -x --hostname foobar
...
libguestfs: trace: write "/etc/hostname" "foobar\x0a"
...
The key guestfish command here is just the 'write'. So
the guestfish equivalent would be:
$ guestfish
><fs> add pool/image protocol:rbd username:admin server:example.com:1234
secret:{keyring}
><fs> run
><fs> [mount up the disks]
><fs> write "/etc/hostname" "foobar\n"
><fs> exit
Rich.
--
Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org
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