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package common
import (
"testing"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
)
const (
privateIP = "10.0.0.1"
publicIP = "192.168.1.1"
privateDNS = "private.dns.test"
publicDNS = "public.dns.test"
localhost = "localhost"
sshHostTemplate = "custom.host.value"
)
func TestSSHHost(t *testing.T) {
origSshHostSleepDuration := sshHostSleepDuration
defer func() { sshHostSleepDuration = origSshHostSleepDuration }()
sshHostSleepDuration = 0
var cases = []struct {
allowTries int
vpcId string
sshInterface string
ok bool
wantHost string
sshHostOverride string
}{
{1, "", "", true, publicDNS, ""},
{1, "", "private_ip", true, privateIP, ""},
{1, "", "session_manager", true, localhost, ""},
{1, "vpc-id", "", true, publicIP, ""},
{1, "vpc-id", "private_ip", true, privateIP, ""},
{1, "vpc-id", "private_dns", true, privateDNS, ""},
{1, "vpc-id", "public_dns", true, publicDNS, ""},
{1, "vpc-id", "public_ip", true, publicIP, ""},
{1, "vpc-id", "session_manager", true, localhost, ""},
{2, "", "", true, publicDNS, ""},
{2, "", "private_ip", true, privateIP, ""},
{2, "vpc-id", "", true, publicIP, ""},
{2, "vpc-id", "private_ip", true, privateIP, ""},
{2, "vpc-id", "private_dns", true, privateDNS, ""},
{2, "vpc-id", "public_dns", true, publicDNS, ""},
{2, "vpc-id", "public_ip", true, publicIP, ""},
{3, "", "", false, "", ""},
{3, "", "private_ip", false, "", ""},
{3, "vpc-id", "", false, "", ""},
{3, "vpc-id", "private_ip", false, "", ""},
{3, "vpc-id", "private_dns", false, "", ""},
{3, "vpc-id", "public_dns", false, "", ""},
{3, "vpc-id", "public_ip", false, "", ""},
{1, "", "", true, sshHostTemplate, sshHostTemplate},
{1, "vpc-id", "", true, sshHostTemplate, sshHostTemplate},
{2, "vpc-id", "private_dns", true, sshHostTemplate, sshHostTemplate},
}
for _, c := range cases {
testSSHHost(t, c.allowTries, c.vpcId, c.sshInterface, c.ok, c.wantHost,
c.sshHostOverride)
}
}
func testSSHHost(t *testing.T, allowTries int, vpcId string, sshInterface string,
ok bool, wantHost string, sshHostOverride string) {
t.Logf("allowTries=%d vpcId=%s sshInterface=%s ok=%t wantHost=%q sshHostOverride=%s",
allowTries, vpcId, sshInterface, ok, wantHost, sshHostOverride)
e := &fakeEC2Describer{
allowTries: allowTries,
vpcId: vpcId,
privateIP: privateIP,
publicIP: publicIP,
privateDNS: privateDNS,
publicDNS: publicDNS,
}
f := SSHHost(e, sshInterface, sshHostOverride)
st := &multistep.BasicStateBag{}
st.Put("instance", &ec2.Instance{
InstanceId: aws.String("instance-id"),
})
host, err := f(st)
if e.tries > allowTries {
t.Fatalf("got %d ec2 DescribeInstances tries, want %d", e.tries, allowTries)
}
switch {
case ok && err != nil:
t.Fatalf("expected no error, got %+v", err)
case !ok && err == nil:
t.Fatalf("expected error, got none and host %s", host)
}
if host != wantHost {
t.Fatalf("got host %s, want %s", host, wantHost)
}
}
type fakeEC2Describer struct {
allowTries int
tries int
vpcId string
privateIP, publicIP, privateDNS, publicDNS string
}
func (d *fakeEC2Describer) DescribeInstances(in *ec2.DescribeInstancesInput) (*ec2.DescribeInstancesOutput, error) {
d.tries++
instance := &ec2.Instance{
InstanceId: aws.String("instance-id"),
}
if d.vpcId != "" {
instance.VpcId = aws.String(d.vpcId)
}
if d.tries >= d.allowTries {
instance.PublicIpAddress = aws.String(d.publicIP)
instance.PrivateIpAddress = aws.String(d.privateIP)
instance.PublicDnsName = aws.String(d.publicDNS)
instance.PrivateDnsName = aws.String(d.privateDNS)
}
out := &ec2.DescribeInstancesOutput{
Reservations: []*ec2.Reservation{
{
Instances: []*ec2.Instance{instance},
},
},
}
return out, nil
}
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