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ri.go
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package main
import (
"context"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/ec2"
"github.com/aws/aws-sdk-go-v2/service/elasticache"
)
type Usages map[string]int32
type Reserved map[string]RICheck
type RICheck struct {
Qty int32 `json:"qty"`
Usage int32 `json:"usage"`
Coverage int32 `json:"coverage"`
Reserved bool `json:"reserved"`
}
func NewConfig(region string) (aws.Config, error) {
cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion(region))
if err != nil {
return cfg, err
}
return cfg, nil
}
func ReservedEC2Instances(cfg aws.Config) (reservedInstances Reserved, err error) {
client := ec2.NewFromConfig(cfg)
ris, err := client.DescribeReservedInstances(context.TODO(), &ec2.DescribeReservedInstancesInput{})
if err != nil {
return reservedInstances, err
}
reservedInstances = Reserved{}
for _, r := range ris.ReservedInstances {
if r.State != "active" {
continue
}
v, ok := reservedInstances[string(r.InstanceType)]
if ok {
v.Qty = v.Qty + *r.InstanceCount
reservedInstances[string(r.InstanceType)] = v
} else {
reservedInstances[string(r.InstanceType)] = RICheck{
Qty: *r.InstanceCount,
}
}
}
return reservedInstances, nil
}
func EC2Usage(cfg aws.Config) (usages Usages, err error) {
client := ec2.NewFromConfig(cfg)
list, err := client.DescribeInstances(context.TODO(), &ec2.DescribeInstancesInput{})
if err != nil {
return usages, err
}
usages = make(map[string]int32)
for _, r := range list.Reservations {
for _, i := range r.Instances {
if i.State.Name != "running" {
continue
}
v, ok := usages[string(i.InstanceType)]
if ok {
usages[string(i.InstanceType)] = v + 1
} else {
usages[string(i.InstanceType)] = 1
}
}
}
return usages, nil
}
func ReservedCacheNodes(cfg aws.Config) (reservedcachenode Reserved, err error) {
client := elasticache.NewFromConfig(cfg)
list, err := client.DescribeReservedCacheNodes(context.TODO(), &elasticache.DescribeReservedCacheNodesInput{})
if err != nil {
return reservedcachenode, err
}
reservedcachenode = Reserved{}
for _, r := range list.ReservedCacheNodes {
if *r.State != "active" {
continue
}
v, ok := reservedcachenode[string(*r.CacheNodeType)]
if ok {
v.Qty = v.Qty + r.CacheNodeCount
reservedcachenode[string(*r.CacheNodeType)] = v
} else {
reservedcachenode[string(*r.CacheNodeType)] = RICheck{
Qty: r.CacheNodeCount,
}
}
}
return reservedcachenode, nil
}
func CacheNodeUsage(cfg aws.Config) (usages Usages, err error) {
client := elasticache.NewFromConfig(cfg)
list, err := client.DescribeCacheClusters(context.TODO(), &elasticache.DescribeCacheClustersInput{})
if err != nil {
return usages, err
}
usages = Usages{}
for _, c := range list.CacheClusters {
v, ok := usages[string(*c.CacheNodeType)]
if ok {
usages[string(*c.CacheNodeType)] = v + 1
} else {
usages[string(*c.CacheNodeType)] = 1
}
}
return usages, nil
}