feat: add hyperv-guest-agent extension#1126
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Confirmed working on real Hyper-V — fully validated on a Talos node. |
smira
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Jun 22, 2026
frezbo
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frezbo
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frezbo
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frezbo
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Jun 23, 2026
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Addressed those comments and tested it again on a hyperv workbench. |
frezbo
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Jun 24, 2026
| TALOS_METAL_AGENT_VERSION: v0.1.5 | ||
| # hyperv-guest-agent builds hv_kvp_daemon and hv_vss_daemon from the in-tree | ||
| # kernel tools/hv sources extracted from the official kernel.org release tarball. | ||
| # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git |
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notes to self:
before merge use the same rule for kernel we use in pkgs and add the renovate lock, so we don't get anything above 6.18
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Add a Hyper-V guest integration extension under guest-agents/, providing the in-tree Linux tools/hv daemons as Talos extension services: - ext-hyperv-kvp (hv_kvp_daemon): report the guest IP, hostname, and OS to the host so Get-VMNetworkAdapter is populated. - ext-hyperv-vss (hv_vss_daemon): take application-consistent checkpoints by freezing the data partition. The daemons are built statically from the kernel tree, modeled on the xen-guest-agent extension; VSS reuses the zfs host-mount pattern. Tier extra. See siderolabs/talos#6435 and siderolabs/talos discussion #12721. Signed-off-by: Ryan VanGundy <ryan@copia.io> Signed-off-by: Noel Georgi <git@frezbo.dev>
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/m |
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Adds a Hyper-V guest integration extension under
guest-agents/. Talos already ships the kernel side (hv_vmbusbuilt in,hv_utilsas a module) but nothing runs the user-space daemons, so the Hyper-V host can't see the guest IP and checkpoints come out crash-consistent only. This came up in siderolabs/talos#6435 and discussion siderolabs/talos#12721.It packages the in-tree Linux
tools/hvdaemons as two extension services:ext-hyperv-kvp(hv_kvp_daemon) reports the guest IP, hostname and OS to the host, soGet-VMNetworkAdaptergets populated.ext-hyperv-vss(hv_vss_daemon) freezes the/vardata partition for application-consistent checkpoints.A few notes on the build:
guest-agents/vars.yaml. Same approach asqemu-guest-agent/xen-guest-agent.zfsextension (rootfsPropagation: shared) so theFIFREEZElands on the real data partition.extra; I've added myself to MAINTAINERS.md.One thing documented in the README: KVP's DNS/DHCP reporting and host-to-guest IP injection rely on the distro helper scripts (
hv_get_dns_infoand friends) that this extension doesn't ship, so those stay empty. IP/hostname/OS reporting doesn't need them.