-
Notifications
You must be signed in to change notification settings - Fork 278
/
terminate.go
44 lines (36 loc) · 1.07 KB
/
terminate.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
package ec2
import (
"fmt"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
)
const defaultInstanceIDBlockSize = 500
// TerminateEc2Instances terminates EC2 instances by calling the AWS API.
func TerminateEc2Instances(session *session.Session, instanceIDs []*string) error {
service := ec2.New(session)
for _, instanceIDChunk := range makeChunks(instanceIDs, defaultInstanceIDBlockSize) {
input := &ec2.TerminateInstancesInput{
InstanceIds: instanceIDChunk,
}
if _, err := service.TerminateInstances(input); err != nil {
return fmt.Errorf("terminating EC2 instances: %v", err)
}
}
return nil
}
func makeChunks[T any](elements []T, chunkSize int) [][]T {
elementsSize := len(elements)
if elementsSize == 0 {
return [][]T{}
}
chunksSize := (elementsSize + chunkSize - 1) / chunkSize
chunks := make([][]T, 0, chunksSize)
start := 0
for i := 0; i < chunksSize-1; i++ {
end := start + chunkSize
chunks = append(chunks, elements[start:end])
start = end
}
chunks = append(chunks, elements[start:elementsSize])
return chunks
}