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cephfs: add read affinity mount option

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This commit makes use of crush location labels from node
labels to supply `crush_location` and `read_from_replica=localize`
options during mount. Using these options, cephfs
will be able to redirect reads to the closest OSD,
improving performance.

Signed-off-by: Praveen M <m.praveen@ibm.com>
This commit is contained in:
Praveen M 2023-11-17 11:59:00 +05:30 committed by mergify[bot]
parent 6446150e67
commit 4d466843b9
13 changed files with 104 additions and 38 deletions
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9
deploy/cephfs/kubernetes/csi-cephfsplugin.yaml
View File

@ -63,6 +63,15 @@ spec:
# and pass the label names below, for CSI to consume and advertise
# its equivalent topology domain
# - "--domainlabels=failure-domain/region,failure-domain/zone"
#
# Options to enable read affinity.
# If enabled Ceph CSI will fetch labels from kubernetes node and
# pass `read_from_replica=localize,crush_location=type:value` during
# CephFS mount command. refer:
# https://docs.ceph.com/en/latest/man/8/rbd/#kernel-rbd-krbd-options
# for more details.
# - "--enable-read-affinity=true"
# - "--crush-location-labels=topology.io/zone,topology.io/rack"
env:
- name: POD_IP
valueFrom:

3
deploy/cephfs/kubernetes/csi-nodeplugin-rbac.yaml
View File

@ -10,6 +10,9 @@ apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: cephfs-csi-nodeplugin
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get"]
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get"]

40
internal/cephfs/driver.go
View File

@ -28,6 +28,7 @@ import (
hc "github.com/ceph/ceph-csi/internal/health-checker"
"github.com/ceph/ceph-csi/internal/journal"
"github.com/ceph/ceph-csi/internal/util"
"github.com/ceph/ceph-csi/internal/util/k8s"
"github.com/ceph/ceph-csi/internal/util/log"
"github.com/container-storage-interface/spec/lib/go/csi"
@ -74,24 +75,29 @@ func NewControllerServer(d *csicommon.CSIDriver) *ControllerServer {
func NewNodeServer(
d *csicommon.CSIDriver,
t string,
topology map[string]string,
kernelMountOptions string,
fuseMountOptions string,
nodeLabels, topology, crushLocationMap map[string]string,
) *NodeServer {
return &NodeServer{
DefaultNodeServer: csicommon.NewDefaultNodeServer(d, t, topology),
cliReadAffinityMapOptions := util.ConstructReadAffinityMapOption(crushLocationMap)
ns := &NodeServer{
DefaultNodeServer: csicommon.NewDefaultNodeServer(d, t, cliReadAffinityMapOptions, topology, nodeLabels),
VolumeLocks: util.NewVolumeLocks(),
kernelMountOptions: kernelMountOptions,
fuseMountOptions: fuseMountOptions,
healthChecker: hc.NewHealthCheckManager(),
}
return ns
}
// Run start a non-blocking grpc controller,node and identityserver for
// ceph CSI driver which can serve multiple parallel requests.
func (fs *Driver) Run(conf *util.Config) {
var err error
var topology map[string]string
var (
err error
nodeLabels, topology, crushLocationMap map[string]string
)
// Configuration
if err = mounter.LoadAvailableMounters(conf); err != nil {
@ -102,6 +108,18 @@ func (fs *Driver) Run(conf *util.Config) {
if conf.InstanceID != "" {
CSIInstanceID = conf.InstanceID
}
if conf.IsNodeServer && k8s.RunsOnKubernetes() {
nodeLabels, err = k8s.GetNodeLabels(conf.NodeID)
if err != nil {
log.FatalLogMsg(err.Error())
}
}
if conf.EnableReadAffinity {
crushLocationMap = util.GetCrushLocationMap(conf.CrushLocationLabels, nodeLabels)
}
// Create an instance of the volume journal
store.VolJournal = journal.NewCSIVolumeJournalWithNamespace(CSIInstanceID, fsutil.RadosNamespace)
@ -138,7 +156,11 @@ func (fs *Driver) Run(conf *util.Config) {
if err != nil {
log.FatalLogMsg(err.Error())
}
fs.ns = NewNodeServer(fs.cd, conf.Vtype, topology, conf.KernelMountOptions, conf.FuseMountOptions)
fs.ns = NewNodeServer(
fs.cd, conf.Vtype,
conf.KernelMountOptions, conf.FuseMountOptions,
nodeLabels, topology, crushLocationMap,
)
}
if conf.IsControllerServer {
@ -151,7 +173,11 @@ func (fs *Driver) Run(conf *util.Config) {
if err != nil {
log.FatalLogMsg(err.Error())
}
fs.ns = NewNodeServer(fs.cd, conf.Vtype, topology, conf.KernelMountOptions, conf.FuseMountOptions)
fs.ns = NewNodeServer(
fs.cd, conf.Vtype,
conf.KernelMountOptions, conf.FuseMountOptions,
nodeLabels, topology, crushLocationMap,
)
fs.cs = NewControllerServer(fs.cd)
}

10
internal/cephfs/nodeserver.go
View File

@ -767,6 +767,7 @@ func (ns *NodeServer) setMountOptions(
) error {
var (
configuredMountOptions string
readAffinityMountOptions string
kernelMountOptions string
fuseMountOptions string
mountOptions []string
@ -781,6 +782,14 @@ func (ns *NodeServer) setMountOptions(
if err != nil {
return err
}
// read affinity mount options
readAffinityMountOptions, err = util.GetReadAffinityMapOptions(
csiConfigFile, volOptions.ClusterID, ns.CLIReadAffinityOptions, ns.NodeLabels,
)
if err != nil {
return err
}
}
switch mnt.(type) {
@ -799,6 +808,7 @@ func (ns *NodeServer) setMountOptions(
configuredMountOptions = kernelMountOptions
}
volOptions.KernelMountOptions = util.MountOptionsAdd(volOptions.KernelMountOptions, configuredMountOptions)
volOptions.KernelMountOptions = util.MountOptionsAdd(volOptions.KernelMountOptions, readAffinityMountOptions)
volOptions.KernelMountOptions = util.MountOptionsAdd(volOptions.KernelMountOptions, mountOptions...)
}

22
internal/cephfs/nodeserver_test.go
View File

@ -26,6 +26,7 @@ import (
"github.com/ceph/ceph-csi/internal/cephfs/mounter"
"github.com/ceph/ceph-csi/internal/cephfs/store"
csicommon "github.com/ceph/ceph-csi/internal/csi-common"
"github.com/ceph/ceph-csi/internal/util"
)
@ -63,19 +64,19 @@ func Test_setMountOptions(t *testing.T) {
t.Logf("path = %s", tmpConfPath)
err = os.WriteFile(tmpConfPath, csiConfigFileContent, 0o600)
if err != nil {
t.Errorf("failed to write %s file content: %v", util.CsiConfigFile, err)
t.Errorf("failed to write %s file content: %v", tmpConfPath, err)
}
tests := []struct {
name string
ns NodeServer
ns *NodeServer
mnt mounter.VolumeMounter
volOptions *store.VolumeOptions
want string
}{
{
name: "KernelMountOptions set in cluster-1 config and not set in CLI",
ns: NodeServer{},
ns: &NodeServer{},
mnt: mounter.VolumeMounter(&mounter.KernelMounter{}),
volOptions: &store.VolumeOptions{
ClusterID: "cluster-1",
@ -84,7 +85,7 @@ func Test_setMountOptions(t *testing.T) {
},
{
name: "FuseMountOptions set in cluster-1 config and not set in CLI",
ns: NodeServer{},
ns: &NodeServer{},
mnt: mounter.VolumeMounter(&mounter.FuseMounter{}),
volOptions: &store.VolumeOptions{
ClusterID: "cluster-1",
@ -93,7 +94,7 @@ func Test_setMountOptions(t *testing.T) {
},
{
name: "KernelMountOptions set in cluster-1 config and set in CLI",
ns: NodeServer{
ns: &NodeServer{
kernelMountOptions: cliKernelMountOptions,
},
mnt: mounter.VolumeMounter(&mounter.KernelMounter{}),
@ -104,7 +105,7 @@ func Test_setMountOptions(t *testing.T) {
},
{
name: "FuseMountOptions not set in cluster-2 config and set in CLI",
ns: NodeServer{
ns: &NodeServer{
fuseMountOptions: cliFuseMountOptions,
},
mnt: mounter.VolumeMounter(&mounter.FuseMounter{}),
@ -115,7 +116,7 @@ func Test_setMountOptions(t *testing.T) {
},
{
name: "KernelMountOptions not set in cluster-2 config and set in CLI",
ns: NodeServer{
ns: &NodeServer{
kernelMountOptions: cliKernelMountOptions,
},
mnt: mounter.VolumeMounter(&mounter.KernelMounter{}),
@ -126,7 +127,7 @@ func Test_setMountOptions(t *testing.T) {
},
{
name: "FuseMountOptions not set in cluster-1 config and set in CLI",
ns: NodeServer{
ns: &NodeServer{
fuseMountOptions: cliFuseMountOptions,
},
mnt: mounter.VolumeMounter(&mounter.FuseMounter{}),
@ -146,6 +147,11 @@ func Test_setMountOptions(t *testing.T) {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
driver := &csicommon.CSIDriver{}
tc.ns.DefaultNodeServer = csicommon.NewDefaultNodeServer(
driver, "cephfs", "", map[string]string{}, map[string]string{},
)
err := tc.ns.setMountOptions(tc.mnt, tc.volOptions, volCap, tmpConfPath)
if err != nil {
t.Errorf("setMountOptions() = %v", err)

4
internal/csi-common/nodeserver-default.go
View File

@ -31,6 +31,10 @@ type DefaultNodeServer struct {
Driver *CSIDriver
Type string
Mounter mount.Interface
// NodeLabels stores the node labels
NodeLabels map[string]string
// CLIReadAffinityOptions contains map options passed through command line to enable read affinity.
CLIReadAffinityOptions string
}
// NodeGetInfo returns node ID.

7
internal/csi-common/utils.go
View File

@ -55,13 +55,18 @@ func NewVolumeCapabilityAccessMode(mode csi.VolumeCapability_AccessMode_Mode) *c
}
// NewDefaultNodeServer initializes default node server.
func NewDefaultNodeServer(d *CSIDriver, t string, topology map[string]string) *DefaultNodeServer {
func NewDefaultNodeServer(
d *CSIDriver, t, cliReadAffinityMapOptions string,
topology, nodeLabels map[string]string,
) *DefaultNodeServer {
d.topology = topology
return &DefaultNodeServer{
Driver: d,
Type: t,
Mounter: mount.NewWithoutSystemd(""),
NodeLabels: nodeLabels,
CLIReadAffinityOptions: cliReadAffinityMapOptions,
}
}

2
internal/nfs/nodeserver/nodeserver.go
View File

@ -54,7 +54,7 @@ func NewNodeServer(
t string,
) *NodeServer {
return &NodeServer{
DefaultNodeServer: *csicommon.NewDefaultNodeServer(d, t, map[string]string{}),
DefaultNodeServer: *csicommon.NewDefaultNodeServer(d, t, "", map[string]string{}, map[string]string{}),
}
}

5
internal/rbd/driver/driver.go
View File

@ -71,11 +71,10 @@ func NewNodeServer(
t string,
nodeLabels, topology, crushLocationMap map[string]string,
) (*rbd.NodeServer, error) {
cliReadAffinityMapOptions := util.ConstructReadAffinityMapOption(crushLocationMap)
ns := rbd.NodeServer{
DefaultNodeServer: csicommon.NewDefaultNodeServer(d, t, topology),
DefaultNodeServer: csicommon.NewDefaultNodeServer(d, t, cliReadAffinityMapOptions, topology, nodeLabels),
VolumeLocks: util.NewVolumeLocks(),
NodeLabels: nodeLabels,
CLIReadAffinityMapOptions: util.ConstructReadAffinityMapOption(crushLocationMap),
}
return &ns, nil

4
internal/rbd/nodeserver.go
View File

@ -45,10 +45,6 @@ type NodeServer struct {
// A map storing all volumes with ongoing operations so that additional operations
// for that same volume (as defined by VolumeID) return an Aborted error
VolumeLocks *util.VolumeLocks
// NodeLabels stores the node labels
NodeLabels map[string]string
// CLIReadAffinityMapOptions contains map options passed through command line to enable read affinity.
CLIReadAffinityMapOptions string
}
// stageTransaction struct represents the state a transaction was when it either completed

11
internal/rbd/nodeserver_test.go
View File

@ -22,6 +22,7 @@ import (
"os"
"testing"
csicommon "github.com/ceph/ceph-csi/internal/csi-common"
"github.com/ceph/ceph-csi/internal/util"
"github.com/container-storage-interface/spec/lib/go/csi"
@ -206,6 +207,7 @@ func TestReadAffinity_GetReadAffinityMapOptions(t *testing.T) {
"topology.kubernetes.io/zone": "east-1",
"topology.kubernetes.io/region": "east",
}
topology := map[string]string{}
csiConfig := []util.ClusterInfo{
{
@ -304,11 +306,16 @@ func TestReadAffinity_GetReadAffinityMapOptions(t *testing.T) {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
crushLocationMap := util.GetCrushLocationMap(tc.CLICrushLocationLabels, nodeLabels)
cliReadAffinityMapOptions := util.ConstructReadAffinityMapOption(crushLocationMap)
driver := &csicommon.CSIDriver{}
ns := &NodeServer{
CLIReadAffinityMapOptions: util.ConstructReadAffinityMapOption(crushLocationMap),
DefaultNodeServer: csicommon.NewDefaultNodeServer(
driver, "rbd", cliReadAffinityMapOptions, topology, nodeLabels,
),
}
readAffinityMapOptions, err := util.GetReadAffinityMapOptions(
tc.clusterID, ns.CLIReadAffinityMapOptions, nodeLabels,
tmpConfPath, tc.clusterID, ns.CLIReadAffinityOptions, nodeLabels,
)
if err != nil {
assert.Fail(t, err.Error())

2
internal/rbd/rbd_attach.go
View File

@ -313,7 +313,7 @@ func (ns *NodeServer) getMapOptions(req *csi.NodeStageVolumeRequest, rv *rbdVolu
}
readAffinityMapOptions, err := util.GetReadAffinityMapOptions(
rv.ClusterID, ns.CLIReadAffinityMapOptions, ns.NodeLabels,
util.CsiConfigFile, rv.ClusterID, ns.CLIReadAffinityOptions, ns.NodeLabels,
)
if err != nil {
return err

5
internal/util/read_affinity.go
View File

@ -48,7 +48,8 @@ func ConstructReadAffinityMapOption(crushLocationMap map[string]string) string {
// If not, it falls back to returning the `cliReadAffinityMapOptions` from the command line.
// If neither of these options is available, it returns an empty string.
func GetReadAffinityMapOptions(
clusterID, cliReadAffinityMapOptions string, nodeLabels map[string]string,
csiConfigFile, clusterID, cliReadAffinityMapOptions string,
nodeLabels map[string]string,
) (string, error) {
var (
err error
@ -56,7 +57,7 @@ func GetReadAffinityMapOptions(
configCrushLocationLabels string
)
configReadAffinityEnabled, configCrushLocationLabels, err = GetCrushLocationLabels(CsiConfigFile, clusterID)
configReadAffinityEnabled, configCrushLocationLabels, err = GetCrushLocationLabels(csiConfigFile, clusterID)
if err != nil {
return "", err
}