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@@ -0,0 +1,35 @@
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+package osversion
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+
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+// List of stable ABI compliant ltsc releases
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+// Note: List must be sorted in ascending order
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+var compatLTSCReleases = []uint16{
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+ V21H2Server,
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+}
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+
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+// CheckHostAndContainerCompat checks if given host and container
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+// OS versions are compatible.
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+// It includes support for stable ABI compliant versions as well.
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+// Every release after WS 2022 will support the previous ltsc
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+// container image. Stable ABI is in preview mode for windows 11 client.
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+// Refer: https://learn.microsoft.com/en-us/virtualization/windowscontainers/deploy-containers/version-compatibility?tabs=windows-server-2022%2Cwindows-10#windows-server-host-os-compatibility
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+func CheckHostAndContainerCompat(host, ctr OSVersion) bool {
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+ // check major minor versions of host and guest
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+ if host.MajorVersion != ctr.MajorVersion ||
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+ host.MinorVersion != ctr.MinorVersion {
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+ return false
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+ }
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+
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+ // If host is < WS 2022, exact version match is required
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+ if host.Build < V21H2Server {
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+ return host.Build == ctr.Build
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+ }
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+
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+ var supportedLtscRelease uint16
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+ for i := len(compatLTSCReleases) - 1; i >= 0; i-- {
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+ if host.Build >= compatLTSCReleases[i] {
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+ supportedLtscRelease = compatLTSCReleases[i]
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+ break
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+ }
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+ }
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+ return ctr.Build >= supportedLtscRelease && ctr.Build <= host.Build
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+}
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