Add file stubs, add comments to guide dev in host

Signed-off-by: Matthew Stobbs <matthew@stobbs.ca>

lib/host/host.go

@@ -19,12 +19,34 @@ import (
 // try the attempted method again
 type Host struct {
 	HostName            string
-	SystemHomeName    string
+	SystemHostName      string
 	FreeMemory          uint64
 	LibVersion          uint32
 	HostInfo            NodeInfo
 	HostSEVInfo         SEVInfo
 	AvailableCPUTypes   []string
+	NodeMemory          NodeMemoryInfo
+	StorageCapabilities string
+	SysInfo             string
+	Alive               bool
+	Encrypted           bool
+	Secure              bool
+	//alldomains
+	//allinterfaces
+	//allnetworks
+	//alldevices
+	//allsecrets
+	//allstoragepools
+	//defineddomains
+	//definedinterfaces
+	//definednetworks
+	//definedstoragepools
+	//listdomains []int id
+	//listinterfaces []string interfacename
+	//listnetworks []string networkname
+	//listserets []string secretname
+	//liststoragepools []string storagepoolname
+
 
 	uri      *URI
 	conn     *libvirt.Connect
@@ -58,6 +80,14 @@ type SEVInfo struct{
 	CPU0ID          string
 }
 
+// NodeMemoryInfo provides statistis about node memory usage from libvirt.NodeMemoryStats
+type NodeMemoryInfo struct {
+	Total   uint64
+	Free    uint64
+	Buffers uint64
+	Cached  uint64
+}
+
 // ConnectHost creates a host connection wrapper that can be used regularly
 func ConnectHost(uri *URI, host string) (*Host, error) {
 	h := &Host{
@@ -118,6 +148,54 @@ func ConnectHost(uri *URI, host string) (*Host, error) {
 		h.HostSEVInfo.CPU0ID = util.SetNotSet(ns.CPU0ID, ns.CPU0IDSet)
 	}
 
+	h.SystemHostName, err = h.conn.GetHostname()
+	if err != nil {
+		log.Println(err)
+	}
+	if h.SystemHostName == "" {
+		h.SystemHostName = h.HostName
+	}
+	h.LibVersion, err = h.conn.GetLibVersion()
+	if err != nil {
+		log.Println(err)
+	}
+	h.FreeMemory, err = h.conn.GetFreeMemory()
+	if err != nil {
+		log.Println(err)
+	}
+
+	mi, err := h.conn.GetMemoryStats(libvirt.NODE_MEMORY_STATS_ALL_CELLS, 0)
+	if err != nil {
+		log.Println(err)
+	}
+	h.NodeMemory.Total = mi.Total
+	h.NodeMemory.Free = mi.Free
+	h.NodeMemory.Buffers = mi.Buffers
+	h.NodeMemory.Cached = mi.Cached
+
+	h.StorageCapabilities, err = h.conn.GetStoragePoolCapabilities(0)
+	if err != nil {
+		log.Println(err)
+	}
+
+	h.SysInfo, err = h.conn.GetSysinfo(0)
+	if err != nil {
+		log.Println(err)
+	}
+
+	h.Alive, err = h.conn.IsAlive()
+	if err != nil {
+		log.Println(err)
+	}
+	h.Encrypted, err = h.conn.IsEncrypted()
+	if err != nil {
+		log.Println(err)
+	}
+	h.Secure, err = h.conn.IsSecure()
+	if err != nil {
+		log.Println(err)
+	}
+
 	go func() {
 		defer close(h.closeErr)
 		<-h.close