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/*
* Copyright 2018 NEC Corporation
*
* 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 main
import (
"fmt"
"github.com/go-redis/redis"
"os"
"strconv"
"strings"
"time"
)
// e.g. collectd/instance-00000001/virt/if_octets-tapd21acb51-35
const redisKey = "collectd/*/virt/if_octets-*"
func zrangebyscore(config *Config, client *redis.Client, key string) []int {
unixNow := int(time.Now().Unix())
val, err := client.ZRangeByScore(key, redis.ZRangeBy{
Min: strconv.Itoa(unixNow - config.Threshold.Interval),
Max: strconv.Itoa(unixNow),
}).Result()
datalist := []int{}
if err == redis.Nil {
fmt.Println("this key is not exist")
os.Exit(1)
} else if err != nil {
panic(err)
} else {
for _, strVal := range val {
split := strings.Split(strVal, ":")
txVal := split[2]
floatVal, err := strconv.ParseFloat(txVal, 64)
if err != nil {
os.Exit(1)
}
datalist = append(datalist, int(floatVal))
}
}
return datalist
}
func read(config *Config) []rawData {
thresConfig := config.Threshold
client := redis.NewClient(&redis.Options{
Addr: thresConfig.RedisHost + ":" + thresConfig.RedisPort,
Password: thresConfig.RedisPassword,
DB: thresConfig.RedisDB,
})
keys, err := client.Keys(redisKey).Result()
if err != nil {
panic(err)
}
rdlist := []rawData{}
for _, key := range keys {
rdlist = append(rdlist, rawData{key, zrangebyscore(config, client, key)})
}
return rdlist
}
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