mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-27 07:20:24 +00:00
4d466843b9
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>
78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
/*
|
|
Copyright 2023 The Ceph-CSI Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package util
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// ConstructReadAffinityMapOption constructs a read affinity map option based on the provided crushLocationMap.
|
|
// It appends crush location labels in the format
|
|
// "read_from_replica=localize,crush_location=label1:value1|label2:value2|...".
|
|
func ConstructReadAffinityMapOption(crushLocationMap map[string]string) string {
|
|
if len(crushLocationMap) == 0 {
|
|
return ""
|
|
}
|
|
|
|
var b strings.Builder
|
|
b.WriteString("read_from_replica=localize,crush_location=")
|
|
first := true
|
|
for key, val := range crushLocationMap {
|
|
if first {
|
|
b.WriteString(fmt.Sprintf("%s:%s", key, val))
|
|
first = false
|
|
} else {
|
|
b.WriteString(fmt.Sprintf("|%s:%s", key, val))
|
|
}
|
|
}
|
|
|
|
return b.String()
|
|
}
|
|
|
|
// GetReadAffinityMapOptions retrieves the readAffinityMapOptions from the CSI config file if it exists.
|
|
// 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(
|
|
csiConfigFile, clusterID, cliReadAffinityMapOptions string,
|
|
nodeLabels map[string]string,
|
|
) (string, error) {
|
|
var (
|
|
err error
|
|
configReadAffinityEnabled bool
|
|
configCrushLocationLabels string
|
|
)
|
|
|
|
configReadAffinityEnabled, configCrushLocationLabels, err = GetCrushLocationLabels(csiConfigFile, clusterID)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if !configReadAffinityEnabled {
|
|
return "", nil
|
|
}
|
|
|
|
if configCrushLocationLabels == "" {
|
|
return cliReadAffinityMapOptions, nil
|
|
}
|
|
|
|
crushLocationMap := GetCrushLocationMap(configCrushLocationLabels, nodeLabels)
|
|
readAffinityMapOptions := ConstructReadAffinityMapOption(crushLocationMap)
|
|
|
|
return readAffinityMapOptions, nil
|
|
}
|