getting host data before each vm on host data
- Hostdata is useful
This commit is contained in:
parent
00758af30b
commit
b5ab70fc25
2
go.mod
2
go.mod
@ -2,4 +2,4 @@ module git.staur.ca/stobbsm/clustvirt
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go 1.22.1
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require libvirt.org/go/libvirt v1.10001.0 // indirect
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require libvirt.org/go/libvirt v1.10001.0
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@ -6,6 +6,7 @@ import (
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"log"
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"time"
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"git.staur.ca/stobbsm/clustvirt/util"
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"libvirt.org/go/libvirt"
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)
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@ -120,11 +121,11 @@ func GetGuest(name string, conn *libvirt.Connect) (*VM, error) {
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return g, err
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}
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g.BlockIOParameters.Weight = blkiop.Weight
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g.BlockIOParameters.DeviceWeight = setNotSet(blkiop.DeviceWeight, blkiop.DeviceWeightSet)
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g.BlockIOParameters.DeviceReadIops = setNotSet(blkiop.DeviceReadIops, blkiop.DeviceReadIopsSet)
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g.BlockIOParameters.DeviceWriteIops = setNotSet(blkiop.DeviceWriteIops, blkiop.DeviceWriteIopsSet)
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g.BlockIOParameters.DeviceReadBps = setNotSet(blkiop.DeviceReadBps, blkiop.DeviceReadBpsSet)
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g.BlockIOParameters.DeviceWriteBps = setNotSet(blkiop.DeviceWriteBps, blkiop.DeviceWriteBpsSet)
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g.BlockIOParameters.DeviceWeight = util.SetNotSet(blkiop.DeviceWeight, blkiop.DeviceWeightSet)
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g.BlockIOParameters.DeviceReadIops = util.SetNotSet(blkiop.DeviceReadIops, blkiop.DeviceReadIopsSet)
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g.BlockIOParameters.DeviceWriteIops = util.SetNotSet(blkiop.DeviceWriteIops, blkiop.DeviceWriteIopsSet)
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g.BlockIOParameters.DeviceReadBps = util.SetNotSet(blkiop.DeviceReadBps, blkiop.DeviceReadBpsSet)
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g.BlockIOParameters.DeviceWriteBps = util.SetNotSet(blkiop.DeviceWriteBps, blkiop.DeviceWriteBpsSet)
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// Set as much guest info as possible
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info, err := g.dom.GetGuestInfo(
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@ -141,13 +142,13 @@ func GetGuest(name string, conn *libvirt.Connect) (*VM, error) {
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if len(info.Disks) > 0 {
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g.Disks = make([]DiskInfo, len(info.Disks))
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for i, n := range info.Disks {
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g.Disks[i].Name = setNotSet(n.Name, n.NameSet)
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g.Disks[i].Alias = setNotSet(n.Alias, n.AliasSet)
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g.Disks[i].Name = util.SetNotSet(n.Name, n.NameSet)
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g.Disks[i].Alias = util.SetNotSet(n.Alias, n.AliasSet)
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g.Disks[i].Partition = n.Partition
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g.Disks[i].GuestAlias = setNotSet(n.GuestAlias, n.GuestAliasSet)
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g.Disks[i].GuestAlias = util.SetNotSet(n.GuestAlias, n.GuestAliasSet)
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g.Disks[i].DiskDependency = make([]string, len(n.Dependencies))
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for j, k := range n.Dependencies {
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g.Disks[i].DiskDependency[j] = setNotSet(k.Name, k.NameSet)
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g.Disks[i].DiskDependency[j] = util.SetNotSet(k.Name, k.NameSet)
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}
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}
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}
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@ -155,23 +156,23 @@ func GetGuest(name string, conn *libvirt.Connect) (*VM, error) {
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if len(info.Users) > 0 {
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g.Users = make([]UserInfo, len(info.Users))
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for i, n := range info.Users {
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g.Users[i].Name = setNotSet(n.Name, n.NameSet)
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g.Users[i].Domain = setNotSet(n.Domain, n.DomainSet)
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g.Users[i].Name = util.SetNotSet(n.Name, n.NameSet)
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g.Users[i].Domain = util.SetNotSet(n.Domain, n.DomainSet)
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g.Users[i].LoginTime = time.Unix(int64(n.LoginTime), 0)
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}
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}
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g.OS.ID = setNotSet(info.OS.ID, info.OS.IDSet)
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g.OS.Name = setNotSet(info.OS.Name, info.OS.NameSet)
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g.OS.Machine = setNotSet(info.OS.Machine, info.OS.MachineSet)
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g.OS.Variant = setNotSet(info.OS.Variant, info.OS.VariantSet)
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g.OS.Version = setNotSet(info.OS.Version, info.OS.VersionSet)
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g.OS.VariantID = setNotSet(info.OS.VariantID, info.OS.VariantIDSet)
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g.OS.VersionID = setNotSet(info.OS.VersionID, info.OS.VersionIDSet)
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g.OS.PrettyName = setNotSet(info.OS.PrettyName, info.OS.PrettyNameSet)
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g.OS.KernelRelease = setNotSet(info.OS.KernelRelease, info.OS.KernelReleaseSet)
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g.OS.KernelVersion = setNotSet(info.OS.KernelVersion, info.OS.KernelVersionSet)
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g.TimeZone.Name = setNotSet(info.TimeZone.Name, info.TimeZone.NameSet)
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g.OS.ID = util.SetNotSet(info.OS.ID, info.OS.IDSet)
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g.OS.Name = util.SetNotSet(info.OS.Name, info.OS.NameSet)
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g.OS.Machine = util.SetNotSet(info.OS.Machine, info.OS.MachineSet)
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g.OS.Variant = util.SetNotSet(info.OS.Variant, info.OS.VariantSet)
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g.OS.Version = util.SetNotSet(info.OS.Version, info.OS.VersionSet)
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g.OS.VariantID = util.SetNotSet(info.OS.VariantID, info.OS.VariantIDSet)
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g.OS.VersionID = util.SetNotSet(info.OS.VersionID, info.OS.VersionIDSet)
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g.OS.PrettyName = util.SetNotSet(info.OS.PrettyName, info.OS.PrettyNameSet)
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g.OS.KernelRelease = util.SetNotSet(info.OS.KernelRelease, info.OS.KernelReleaseSet)
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g.OS.KernelVersion = util.SetNotSet(info.OS.KernelVersion, info.OS.KernelVersionSet)
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g.TimeZone.Name = util.SetNotSet(info.TimeZone.Name, info.TimeZone.NameSet)
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g.TimeZone.Offset = info.TimeZone.Offset
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// Set the hostname from the guest if it is set, otherwise use the VM name
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@ -183,13 +184,13 @@ func GetGuest(name string, conn *libvirt.Connect) (*VM, error) {
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if len(info.Interfaces) > 0 {
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g.NetIFace = make([]NetIFaceInfo, len(info.Interfaces))
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for i, n := range info.Interfaces {
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g.NetIFace[i].HWAddr = setNotSet(n.Hwaddr, n.HwaddrSet)
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g.NetIFace[i].Name = setNotSet(n.Name, n.NameSet)
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g.NetIFace[i].HWAddr = util.SetNotSet(n.Hwaddr, n.HwaddrSet)
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g.NetIFace[i].Name = util.SetNotSet(n.Name, n.NameSet)
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if len(n.Addrs) > 0 {
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g.NetIFace[i].IP = make([]IPInfo, len(n.Addrs))
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for j, a := range n.Addrs {
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g.NetIFace[i].IP[j].Addr = setNotSet(a.Addr, a.AddrSet)
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g.NetIFace[i].IP[j].Type = setNotSet(a.Type, a.TypeSet)
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g.NetIFace[i].IP[j].Addr = util.SetNotSet(a.Addr, a.AddrSet)
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g.NetIFace[i].IP[j].Type = util.SetNotSet(a.Type, a.TypeSet)
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g.NetIFace[i].IP[j].Prefix = a.Prefix
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}
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}
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@ -210,14 +211,6 @@ func GetGuest(name string, conn *libvirt.Connect) (*VM, error) {
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return g, nil
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}
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// helper function to set a string value to "NotSet" if it wasn't actually set
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func setNotSet(v string, s bool) string {
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if s {
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return v
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}
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return "Notset"
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}
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// Close closes an open connection
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func (g *VM) Close() error {
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log.Println("Closing VM", g.Name)
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@ -1,10 +1,16 @@
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// Package host provides utilities and data structures in relation to a libvirt host.
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// This includes getting a list of virtual machines running on a host, launching
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// a new virtual machine on a host, triggering a virtual machine migration to another
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// host, getting hardware and resource usage from a host, and eventually more.
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// Most of this is data at the moment, ensuring data can be gathered efficiently without
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// slowing down the host from it's main job of running virtual machines.
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package host
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import (
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"fmt"
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"log"
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"git.staur.ca/stobbsm/clustvirt/lib/guest"
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"git.staur.ca/stobbsm/clustvirt/util"
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"libvirt.org/go/libvirt"
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)
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@ -13,16 +19,50 @@ import (
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// try the attempted method again
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type Host struct {
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HostName string
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SystemHomeName string
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FreeMemory uint64
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LibVersion uint32
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HostInfo NodeInfo
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HostSEVInfo SEVInfo
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AvailableCPUTypes []string
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uri *URI
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conn *libvirt.Connect
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close chan struct{}
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closeErr chan error
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}
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// NodeInfo represents the basic HW info for a host node
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type NodeInfo struct {
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// livirt.NodeInfo section
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Model string
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Memory uint64
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Cpus uint
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MHz uint
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Nodes uint32
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Sockets uint32
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Cores uint32
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Threads uint32
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}
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// SEVInfo provides information about AMD SEV support
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type SEVInfo struct{
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// livirt.NodeSEVParameters section
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SEVEnabled bool
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PDH string
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CertChain string
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CBitPos uint
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ReducedPhysBits uint
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MaxGuests uint
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MaxEsGuests uint
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CPU0ID string
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}
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// ConnectHost creates a host connection wrapper that can be used regularly
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func ConnectHost(host string) (*Host, error) {
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func ConnectHost(uri *URI, host string) (*Host, error) {
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h := &Host{
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HostName: host,
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uri: uri,
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}
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if err := h.connect(); err != nil {
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@ -32,6 +72,52 @@ func ConnectHost(host string) (*Host, error) {
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h.close = make(chan struct{})
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h.closeErr = make(chan error)
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var err error
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h.AvailableCPUTypes, err = h.conn.GetCPUModelNames("x86_64", 0)
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if err != nil {
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log.Println("Error getting cpu model names", err)
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}
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// Extract libvirt.NodeInfo and libvirt.NodeSEVParameters
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ni, err := h.conn.GetNodeInfo()
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if err != nil {
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return nil, err
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}
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h.HostInfo.Model = ni.Model
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h.HostInfo.Memory = ni.Memory
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h.HostInfo.Cpus = ni.Cpus
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h.HostInfo.MHz = ni.MHz
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h.HostInfo.Nodes = ni.Nodes
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h.HostInfo.Sockets = ni.Sockets
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h.HostInfo.Cores = ni.Cores
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h.HostInfo.Threads = ni.Threads
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// Assume SEV is enabled, until we know otherwise
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h.HostSEVInfo.SEVEnabled = true
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ns, err := h.conn.GetSEVInfo(0)
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if err != nil {
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lverr, ok := err.(libvirt.Error)
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if !ok {
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return nil, err
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}
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switch lverr.Code {
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case 84:
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log.Println("SEV functions not supported")
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h.HostSEVInfo.SEVEnabled = false
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default:
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log.Println("Error encountered", lverr.Error())
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}
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}
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if h.HostSEVInfo.SEVEnabled {
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h.HostSEVInfo.PDH = util.SetNotSet(ns.PDH, ns.PDHSet)
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h.HostSEVInfo.CertChain = util.SetNotSet(ns.CertChain, ns.CertChainSet)
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h.HostSEVInfo.CBitPos = ns.CBitPos
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h.HostSEVInfo.ReducedPhysBits = ns.ReducedPhysBits
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h.HostSEVInfo.MaxGuests = ns.MaxGuests
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h.HostSEVInfo.MaxEsGuests = ns.MaxEsGuests
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h.HostSEVInfo.CPU0ID = util.SetNotSet(ns.CPU0ID, ns.CPU0IDSet)
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}
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go func() {
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defer close(h.closeErr)
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<-h.close
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@ -44,9 +130,7 @@ func ConnectHost(host string) (*Host, error) {
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// connect creates a host connection
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func (h *Host) connect() error {
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var err error
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h.conn, err = libvirt.NewConnect(
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fmt.Sprintf("qemu+ssh://%s/system", h.HostName),
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)
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h.conn, err = libvirt.NewConnect(h.uri.ConnectionString(h.HostName))
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return err
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}
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82
lib/host/uri.go
Normal file
82
lib/host/uri.go
Normal file
@ -0,0 +1,82 @@
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package host
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import (
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"log"
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"strings"
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)
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// URI is a string type, accessed via the pre-defined variables, and represent
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// the URI pattern used to connect to a host.
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// Example:
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// Driver[+Transport]://<host or empty for local>[:PORT]/<path>[?Options&in=uri&format]
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type URI struct {
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Driver string
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Transport string
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Path string
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Options []string
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}
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// CustomURI create and return a custom URI method, following RFC2396,
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// keeping in mind that the hostname will be inserted between the transport and path
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func CustomURI(driver, transport, path string, options ...string) *URI {
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return &URI{
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Driver: driver,
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Transport: transport,
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Path: path,
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Options: options,
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}
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}
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// URIs available to build connections to a libvirt host
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var (
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// URI for connecting to a remote QEMU system over SSH
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URI_QEMU_SSH_SYSTEM = &URI{Driver: "qemu", Transport: "ssh", Path: "system"}
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// URI for connecting to a remote QEMU system over TLS
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// Builds the URI qemu://<host:port>/system
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URI_QEMU_TLS_SYSTEM = &URI{Driver: "qemu", Transport: "", Path: "system"}
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// URI for connecting to a remote QEMU session over SSH
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URI_QEMU_SSH_SESSION = &URI{Driver: "qemu", Transport: "ssh", Path: "session"}
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// URI for connecting to a local QEMU system over a UNIX socket
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URI_QEMU_UNIX_SYSTEM = &URI{Driver: "qemu", Transport: "unix", Path: "system"}
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// URI for connecting to a remote QEMU system over unsecured TCP
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URI_QEMU_TCP_SYSTEM = &URI{Driver: "qemu", Transport: "tcp", Path: "system"}
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// URI for connecting to a remote XEN system with SSH
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URI_XEN_SSH_SYSTEM = &URI{Driver: "xen", Transport: "ssh", Path: "system"}
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// URI for connecting to a remote XEN system over TLS
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URI_XEN_TLS_SYSTEM = &URI{Driver: "xen", Transport: "", Path: "system"}
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)
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// ConnectionString takes a host name to interpolate into a URI and returns the string
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func (u *URI) ConnectionString(h string) string {
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var sb strings.Builder
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optlen := len(u.Options)
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sb.WriteString(u.Driver)
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if u.Transport != "" {
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sb.WriteRune('+')
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sb.WriteString(u.Transport)
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}
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sb.WriteString("://")
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if h != "" {
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sb.WriteString(h)
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}
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sb.WriteRune('/')
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sb.WriteString(u.Path)
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if optlen > 0 {
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sb.WriteRune('?')
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for i, o := range u.Options {
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sb.WriteString(o)
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if optlen != i+1 {
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sb.WriteRune('&')
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}
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}
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}
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log.Printf("Connection URI: %s", sb.String())
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return sb.String()
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}
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// AddOpt adds more options to the option list
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func (u *URI) AddOpt(opt string) {
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u.Options = append(u.Options, opt)
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}
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3
main.go
3
main.go
@ -9,11 +9,12 @@ import (
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func main() {
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log.Println("Starting clustvirt, the libvirt cluster manager")
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venus, err := host.ConnectHost("venus.staur.ca")
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venus, err := host.ConnectHost(host.URI_QEMU_SSH_SYSTEM, "venus.staur.ca")
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if err != nil {
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log.Fatal(err)
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}
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defer venus.Close()
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log.Println(venus)
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lm, err := venus.GetGuestByName("logan-minecraft")
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if err != nil {
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log.Fatal(err)
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9
util/util.go
Normal file
9
util/util.go
Normal file
@ -0,0 +1,9 @@
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package util
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// helper function to set a string value to "NotSet" if it wasn't actually set
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func SetNotSet(v string, s bool) string {
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if s {
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return v
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}
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return "Notset"
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}
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