1 files changed, 60 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/vsphere/discover/filter.go b/src/go/collectors/go.d.plugin/modules/vsphere/discover/filter.go
new file mode 100644
index 000000000..73c1481e3
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/vsphere/discover/filter.go
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package discover
+
+import (
+	"time"
+
+	rs "github.com/netdata/netdata/go/go.d.plugin/modules/vsphere/resources"
+)
+
+func (d Discoverer) matchHost(host *rs.Host) bool {
+	if d.HostMatcher == nil {
+		return true
+	}
+	return d.HostMatcher.Match(host)
+}
+
+func (d Discoverer) matchVM(vm *rs.VM) bool {
+	if d.VMMatcher == nil {
+		return true
+	}
+	return d.VMMatcher.Match(vm)
+}
+
+func (d Discoverer) removeUnmatched(res *rs.Resources) (removed int) {
+	d.Debug("discovering : filtering : starting filtering resources process")
+	t := time.Now()
+	numH, numV := len(res.Hosts), len(res.VMs)
+	removed += d.removeUnmatchedHosts(res.Hosts)
+	removed += d.removeUnmatchedVMs(res.VMs)
+	d.Infof("discovering : filtering : filtered %d/%d hosts, %d/%d vms, process took %s",
+		numH-len(res.Hosts),
+		numH,
+		numV-len(res.VMs),
+		numV,
+		time.Since(t))
+	return
+}
+
+func (d Discoverer) removeUnmatchedHosts(hosts rs.Hosts) (removed int) {
+	for _, v := range hosts {
+		if !d.matchHost(v) {
+			removed++
+			hosts.Remove(v.ID)
+		}
+	}
+	d.Debugf("discovering : filtering : removed %d unmatched hosts", removed)
+	return removed
+}
+
+func (d Discoverer) removeUnmatchedVMs(vms rs.VMs) (removed int) {
+	for _, v := range vms {
+		if !d.matchVM(v) {
+			removed++
+			vms.Remove(v.ID)
+		}
+	}
+	d.Debugf("discovering : filtering : removed %d unmatched vms", removed)
+	return removed
+}