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|
package opts
import (
"encoding/csv"
"fmt"
"regexp"
"strconv"
"strings"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/go-connections/nat"
"github.com/sirupsen/logrus"
)
const (
portOptTargetPort = "target"
portOptPublishedPort = "published"
portOptProtocol = "protocol"
portOptMode = "mode"
)
// PortOpt represents a port config in swarm mode.
type PortOpt struct {
ports []swarm.PortConfig
}
// Set a new port value
//
//nolint:gocyclo
func (p *PortOpt) Set(value string) error {
longSyntax, err := regexp.MatchString(`\w+=\w+(,\w+=\w+)*`, value)
if err != nil {
return err
}
if longSyntax {
csvReader := csv.NewReader(strings.NewReader(value))
fields, err := csvReader.Read()
if err != nil {
return err
}
pConfig := swarm.PortConfig{}
for _, field := range fields {
parts := strings.SplitN(field, "=", 2)
if len(parts) != 2 {
return fmt.Errorf("invalid field %s", field)
}
key := strings.ToLower(parts[0])
value := strings.ToLower(parts[1])
switch key {
case portOptProtocol:
if value != string(swarm.PortConfigProtocolTCP) && value != string(swarm.PortConfigProtocolUDP) && value != string(swarm.PortConfigProtocolSCTP) {
return fmt.Errorf("invalid protocol value %s", value)
}
pConfig.Protocol = swarm.PortConfigProtocol(value)
case portOptMode:
if value != string(swarm.PortConfigPublishModeIngress) && value != string(swarm.PortConfigPublishModeHost) {
return fmt.Errorf("invalid publish mode value %s", value)
}
pConfig.PublishMode = swarm.PortConfigPublishMode(value)
case portOptTargetPort:
tPort, err := strconv.ParseUint(value, 10, 16)
if err != nil {
return err
}
pConfig.TargetPort = uint32(tPort)
case portOptPublishedPort:
pPort, err := strconv.ParseUint(value, 10, 16)
if err != nil {
return err
}
pConfig.PublishedPort = uint32(pPort)
default:
return fmt.Errorf("invalid field key %s", key)
}
}
if pConfig.TargetPort == 0 {
return fmt.Errorf("missing mandatory field %q", portOptTargetPort)
}
if pConfig.PublishMode == "" {
pConfig.PublishMode = swarm.PortConfigPublishModeIngress
}
if pConfig.Protocol == "" {
pConfig.Protocol = swarm.PortConfigProtocolTCP
}
p.ports = append(p.ports, pConfig)
} else {
// short syntax
portConfigs := []swarm.PortConfig{}
ports, portBindingMap, err := nat.ParsePortSpecs([]string{value})
if err != nil {
return err
}
for _, portBindings := range portBindingMap {
for _, portBinding := range portBindings {
if portBinding.HostIP != "" {
return fmt.Errorf("hostip is not supported")
}
}
}
for port := range ports {
portConfig, err := ConvertPortToPortConfig(port, portBindingMap)
if err != nil {
return err
}
portConfigs = append(portConfigs, portConfig...)
}
p.ports = append(p.ports, portConfigs...)
}
return nil
}
// Type returns the type of this option
func (p *PortOpt) Type() string {
return "port"
}
// String returns a string repr of this option
func (p *PortOpt) String() string {
ports := []string{}
for _, port := range p.ports {
repr := fmt.Sprintf("%v:%v/%s/%s", port.PublishedPort, port.TargetPort, port.Protocol, port.PublishMode)
ports = append(ports, repr)
}
return strings.Join(ports, ", ")
}
// Value returns the ports
func (p *PortOpt) Value() []swarm.PortConfig {
return p.ports
}
// ConvertPortToPortConfig converts ports to the swarm type
func ConvertPortToPortConfig(
port nat.Port,
portBindings map[nat.Port][]nat.PortBinding,
) ([]swarm.PortConfig, error) {
ports := []swarm.PortConfig{}
for _, binding := range portBindings[port] {
if binding.HostIP != "" && binding.HostIP != "0.0.0.0" {
logrus.Warnf("ignoring IP-address (%s:%s:%s) service will listen on '0.0.0.0'", binding.HostIP, binding.HostPort, port)
}
startHostPort, endHostPort, err := nat.ParsePortRange(binding.HostPort)
if err != nil && binding.HostPort != "" {
return nil, fmt.Errorf("invalid hostport binding (%s) for port (%s)", binding.HostPort, port.Port())
}
for i := startHostPort; i <= endHostPort; i++ {
ports = append(ports, swarm.PortConfig{
// TODO Name: ?
Protocol: swarm.PortConfigProtocol(strings.ToLower(port.Proto())),
TargetPort: uint32(port.Int()),
PublishedPort: uint32(i),
PublishMode: swarm.PortConfigPublishModeIngress,
})
}
}
return ports, nil
}
|
