fix: host report ovs kmod version and ksm status (#21328)

Co-authored-by: Qiu Jian <qiujian@yunionyun.com>

pkg/hostman/hostinfo/hostinfo.go

@@ -731,10 +731,12 @@ func (h *SHostInfo) EnableKsm(sleepSec int) {
 	sysutils.SetSysConfig("/sys/kernel/mm/ksm/run", "1")
 	sysutils.SetSysConfig("/sys/kernel/mm/ksm/sleep_millisecs",
 		fmt.Sprintf("%d", sleepSec*1000))
+	h.sysinfo.EnableKsm = true
 }
 
 func (h *SHostInfo) DisableKsm() {
 	sysutils.SetSysConfig("/sys/kernel/mm/ksm/run", "0")
+	h.sysinfo.EnableKsm = false
 }
 
 func (h *SHostInfo) PreventArpFlux() {
@@ -1088,8 +1090,12 @@ func (h *SHostInfo) detectOvsKOVersion() error {
 	lines := strings.Split(string(output), "\n")
 	for i := 0; i < len(lines); i++ {
 		line := lines[i]
-		if strings.HasPrefix(line, "version:") || strings.HasPrefix(line, "vermagic") {
+		if strings.HasPrefix(line, "version:") || strings.HasPrefix(line, "vermagic:") {
 			log.Infof("kernel module openvswitch %s", line)
+			parts := strings.Split(line, ":")
+			if len(parts) > 1 {
+				h.sysinfo.OvsKmodVersion = strings.TrimSpace(parts[1])
+			}
 			return nil
 		}
 	}

pkg/hostman/hostinfo/hostinfohelper.go

@@ -325,6 +325,7 @@ type SSysInfo struct {
 	KernelVersion  string `json:"kernel_version"`
 	QemuVersion    string `json:"qemu_version"`
 	OvsVersion     string `json:"ovs_version"`
+	OvsKmodVersion string `json:"ovs_kmod_version"`
 	KvmModule      string `json:"kvm_module"`
 	CpuModelName   string `json:"cpu_model_name"`
 	CpuMicrocode   string `json:"cpu_microcode"`
@@ -335,6 +336,7 @@ type SSysInfo struct {
 	HugepageSizeKb  int                          `json:"hugepage_size_kb"`
 	HugepageNr      *int                         `json:"hugepage_nr"`
 	NodeHugepages   []hostapi.HostNodeHugepageNr `json:"node_hugepages"`
+	EnableKsm       bool                         `json:"enable_ksm"`
 
 	Topology        *hostapi.HostTopology `json:"topology"`
 	CPUInfo         *hostapi.HostCPUInfo  `json:"cpu_info"`

pkg/lbagent/service.go

@@ -16,6 +16,7 @@ package lbagent
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"os/signal"
 	"sync"
@@ -30,6 +31,7 @@ import (
 	"yunion.io/x/onecloud/pkg/util/fileutils2"
 	"yunion.io/x/onecloud/pkg/util/ovnutils"
 	"yunion.io/x/onecloud/pkg/util/procutils"
+	"yunion.io/x/onecloud/pkg/util/sysutils"
 )
 
 func StartService() {
@@ -76,6 +78,8 @@ func StartService() {
 		}
 	}
 
+	tuneSystem()
+
 	var haproxyHelper *HaproxyHelper
 	var apiHelper *ApiHelper
 	var haStateWatcher *HaStateWatcher
@@ -122,3 +126,20 @@ func StartService() {
 		wg.Wait()
 	}
 }
+
+func tuneSystem() {
+	minMemKB := fmt.Sprintf("%d", 128*1024)
+	kv := map[string]string{
+		"/proc/sys/vm/swappiness":                             "0",
+		"/proc/sys/vm/vfs_cache_pressure":                     "350",
+		"/proc/sys/vm/min_free_kbytes":                        minMemKB,
+		"/proc/sys/net/ipv4/tcp_mtu_probing":                  "2",
+		"/proc/sys/net/ipv4/neigh/default/gc_thresh1":         "1024",
+		"/proc/sys/net/ipv4/neigh/default/gc_thresh2":         "4096",
+		"/proc/sys/net/ipv4/neigh/default/gc_thresh3":         "8192",
+		"/proc/sys/net/netfilter/nf_conntrack_tcp_be_liberal": "1",
+	}
+	for k, v := range kv {
+		sysutils.SetSysConfig(k, v)
+	}
+}