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32839948ef
The internal/ directory in Go has a special meaning, and indicates that those packages are not meant for external consumption. Ceph-CSI does provide public APIs for other projects to consume. There is no plan to keep the API of the internally used packages stable. Closes: #903 Signed-off-by: Niels de Vos <ndevos@redhat.com>
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
/*
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Copyright 2019 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"strings"
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)
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/*
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Mons returns a comma separated MON list from the csi config for the given clusterID
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Expected JSON structure in the passed in config file is,
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[
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{
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"clusterID": "<cluster-id>",
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"monitors":
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[
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"<monitor-value>",
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"<monitor-value>",
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...
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]
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},
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...
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]
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*/
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// clusterInfo strongly typed JSON spec for the above JSON structure
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type clusterInfo struct {
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ClusterID string `json:"clusterID"`
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Monitors []string `json:"monitors"`
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}
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func Mons(pathToConfig, clusterID string) (string, error) {
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var config []clusterInfo
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// #nosec
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content, err := ioutil.ReadFile(pathToConfig)
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if err != nil {
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err = fmt.Errorf("error fetching configuration for cluster ID (%s). (%s)", clusterID, err)
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return "", err
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}
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err = json.Unmarshal(content, &config)
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if err != nil {
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return "", fmt.Errorf("unmarshal failed: %v. raw buffer response: %s",
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err, string(content))
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}
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for _, cluster := range config {
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if cluster.ClusterID == clusterID {
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if len(cluster.Monitors) == 0 {
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return "", fmt.Errorf("empty monitor list for cluster ID (%s) in config", clusterID)
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}
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return strings.Join(cluster.Monitors, ","), nil
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}
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}
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return "", fmt.Errorf("missing configuration for cluster ID (%s)", clusterID)
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}
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