105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
package warewulfd
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/warewulf/warewulf/internal/pkg/node"
|
|
"github.com/warewulf/warewulf/internal/pkg/wwlog"
|
|
)
|
|
|
|
type nodeDB struct {
|
|
lock sync.RWMutex
|
|
NodeInfo map[string]string
|
|
yml node.NodesYaml
|
|
}
|
|
|
|
var (
|
|
db nodeDB
|
|
)
|
|
|
|
func LoadNodeDB() error {
|
|
|
|
db.lock.Lock()
|
|
defer db.lock.Unlock()
|
|
return loadNodeDB()
|
|
}
|
|
|
|
func loadNodeDB() (err error) {
|
|
TmpMap := make(map[string]string)
|
|
|
|
db.yml, err = node.New()
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
nodes, err := db.yml.FindAllNodes()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, n := range nodes {
|
|
if n.Discoverable.Bool() {
|
|
continue
|
|
}
|
|
for _, netdev := range n.NetDevs {
|
|
hwaddr := strings.ToLower(netdev.Hwaddr)
|
|
TmpMap[hwaddr] = n.Id()
|
|
}
|
|
}
|
|
|
|
db.NodeInfo = TmpMap
|
|
return nil
|
|
}
|
|
|
|
func GetNodeOrSetDiscoverable(hwaddr string) (node.Node, error) {
|
|
db.lock.RLock()
|
|
defer db.lock.RUnlock()
|
|
// NOTE: since discoverable nodes will write an updated DB to file and then
|
|
// reload, it is not enough to lock individual reads from the DB
|
|
// to ensure the condition on which the node is updated is still satisfied
|
|
// after the DB is read back in.
|
|
|
|
nId, ok := db.NodeInfo[hwaddr]
|
|
if ok {
|
|
return db.yml.GetNode(nId)
|
|
}
|
|
|
|
// If we failed to find a node, let's see if we can add one...
|
|
wwlog.Warn("node not configured: %s", hwaddr)
|
|
|
|
node, netdev, err := db.yml.FindDiscoverableNode()
|
|
if err != nil {
|
|
// NOTE: this is taken as there is no discoverable node, so return the
|
|
// empty one
|
|
return node, err
|
|
}
|
|
// update node
|
|
wwlog.Debug("discoverd node: %s netdev: %s", node.Id(), netdev)
|
|
nodeChanges, _ := db.yml.GetNodeOnly(node.Id()) // ignore error as nodeId is in db
|
|
wwlog.Debug("node: %v", nodeChanges)
|
|
nodeChanges.NetDevs[netdev].Hwaddr = hwaddr
|
|
nodeChanges.Discoverable = "UNDEF"
|
|
err = db.yml.SetNode(node.Id(), nodeChanges)
|
|
if err != nil {
|
|
return node, err
|
|
}
|
|
err = db.yml.Persist()
|
|
if err != nil {
|
|
return node, fmt.Errorf("%s (failed to persist node configuration) %w", hwaddr, err)
|
|
}
|
|
err = loadNodeDB()
|
|
if err != nil {
|
|
return node, fmt.Errorf("%s (failed to reload configuration) %w", hwaddr, err)
|
|
}
|
|
// NOTE: previously all overlays were built here, but that will also
|
|
// be done automatically when attempting to serve an overlay that
|
|
// hasn't been built (without blocking the database).
|
|
|
|
wwlog.Serv("%s (node %s automatically configured)", hwaddr, node.Id())
|
|
|
|
// return the discovered node
|
|
return db.yml.GetNode(node.Id())
|
|
}
|