ganeti-kvmd(8)

✨ ganeti-kvmd ✨

okay bestie, welcome to the ganeti-kvmd(8) page — this is the Ganeti KVM daemon and it's literally the little detective that figures out why your KVM instance went bye-bye 🕵️♀️💖

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🌸 NAME 🌸

ganeti-kvmd — Ganeti KVM daemon 💅

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🎀 SYNOPSIS 🎀

ganeti-kvmd

that's it. that's the whole vibe. no flags, no args, she just is 👑

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🦋 DESCRIPTION 🦋

so the KVM daemon has one job and she is so good at it: she figures out whether a given KVM instance got shut down by an administrator or by a user. that's the whole tea. 🍵

the way she does it? she monitors KVM instances through their QMP sockets, which are provided by KVM, using inotify. ngl that's kind of iconic.

and over those QMP sockets, she listens for particular shutdown, powerdown, and stop events. those events are what tell her whether a given instance was shut down by the user or by Ganeti. then she communicates that result back to Ganeti via a special file in the filesystem. like, she leaves a lil note. a sticky note. for Ganeti. 💌

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💖 FILES 💖

okay so here's the geography of it all, bestie:

the KVM daemon monitors the QMP sockets of KVM instances, and those get created in the KVM control directory, which lives under:

/var/run/ganeti/kvm-hypervisor/ctrl/

she also creates shutdown files in that same directory. multitasking queen. ✨

and finally, the KVM daemon's log file lives at:

/var/log/ganeti/ganeti-kvmd.log

💀 heads up though — removal of the KVM control directory, the shutdown files, or the log file, will lead to no errors on the KVM daemon. she simply does not care. unbothered. unshakeable. 🧘♀️

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🙈 REPORTING BUGS 🙈

found a bug? don't be shy, bestie. report bugs to the project's issue tracker, or contact the developers using the Ganeti mailing list. 🫶

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🌈 SEE ALSO 🌈

Ganeti overview and specifications:

• ganeti(7) — general overview
• ganeti-os-interface(7) — guest OS definitions
• ganeti-extstorage-interface(7) — external storage providers

Ganeti commands:

• gnt-cluster(8) — cluster-wide commands
• gnt-job(8) — job-related commands
• gnt-node(8) — node-related commands
• gnt-instance(8) — instance commands
• gnt-os(8) — guest OS commands
• gnt-storage(8) — storage commands
• gnt-group(8) — node group commands
• gnt-backup(8) — instance import/export commands
• gnt-debug(8) — debug commands

Ganeti daemons:

• ganeti-watcher(8) — automatic instance restarter
• ganeti-cleaner(8) — job queue cleaner
• ganeti-noded(8) — node daemon
• ganeti-rapi(8) — remote API daemon

Ganeti htools:

• htools(1) — generic binary
• hbal(1) — cluster balancer
• hspace(1) — capacity calculation
• hail(1) — IAllocator plugin
• hscan(1) — data gatherer from remote clusters
• hinfo(1) — cluster information printer
• mon-collector(7) — data collectors interface

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👑 COPYRIGHT 👑

okay the legal girlies are talking now, so let's keep it exactly as written, no cap:

Copyright (C) 2006-2015 Google Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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💌 and that's the whole page, bestie! this lil masterpiece is from Ganeti, Version 3.1.0~rc2, and yeah — ganeti-kvmd(8), she ate and left no crumbs. periodt. 💅✨🎀🦋