// vpnGatewayAttachStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// the state of a VPN gateway's attachment
func vpnGatewayAttachStateRefreshFunc(conn *ec2.EC2, id string, expected string) resource.StateRefreshFunc {
var start time.Time
return func() (interface{}, string, error) {
if start.IsZero() {
start = time.Now()
}
resp, err := conn.DescribeVPNGateways(&ec2.DescribeVPNGatewaysInput{
VPNGatewayIDs: []*string{aws.String(id)},
})
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidVpnGatewayID.NotFound" {
resp = nil
} else {
log.Printf("[ERROR] Error on VpnGatewayStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
vpnGateway := resp.VPNGateways[0]
if time.Now().Sub(start) > 10*time.Second {
return vpnGateway, expected, nil
}
if len(vpnGateway.VPCAttachments) == 0 {
// No attachments, we're detached
return vpnGateway, "detached", nil
}
return vpnGateway, *vpnGateway.VPCAttachments[0].State, nil
}
}