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models.go
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models.go
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package containermessage
import (
"bytes"
"encoding/json"
"errors"
"fmt"
docker "github.com/fsouza/go-dockerclient"
"reflect"
"strings"
)
/*
*
* The external representations of the service deployment string; once processed, the data is stored in a persistence.MicroserviceDefinition object for a service
*
* ex:
* {
* "services": {
* "service_a": {
* "image": "...",
* "privileged": true,
* "environment": [
* "FOO=bar"
* ],
* "devices": [
* "/dev/bus/usb/001/001:/dev/bus/usb/001/001"
* ],
* "binds": [
* "/tmp/testdata:/tmp/mydata:ro",
* "myvolume1:/tmp/mydata2"
* ],
* "ports": [
* {
* "HostPort":"5200:6414/tcp",
* "HostIP": "0.0.0.0"
* }
* ]
* },
* "service_b": {
* "image": "...",
* "network_isolation": {
* "outbound_permit_only_ignore": "ETH_ACCT_SPECIFIED",
* "outbound_permit_only": [
* "4.2.2.2",
* "198.60.52.64/26",
* {
* "dd_key": "deployment_user_info",
* "encoding": "JSON",
* "path": "cloudMsgBrokerHost.foo.goo"
* }
* ]
* }
* }
* },
* "service_pattern": {
* "shared": {
* "singleton": [
* "service_a",
* "service_b"
* ]
* }
* }
* }
*/
type DeploymentDescription struct {
Services map[string]*Service `json:"services"`
ServicePattern Pattern `json:"service_pattern"`
Infrastructure bool `json:"infrastructure"`
Overrides map[string]*Service `json:"overrides"`
}
var invalidDeploymentOptions = map[string][]string{
"workload": []string{},
"infrastructure": []string{},
}
func (d DeploymentDescription) IsValidFor(context string) bool {
for _, service := range d.Services {
for _, invalidField := range invalidDeploymentOptions[context] {
v := reflect.ValueOf(*service)
fv := v.FieldByName(invalidField)
switch fv.Type().String() {
case "[]string":
if fv.Len() != reflect.Zero(fv.Type()).Len() {
return false
}
case "[]docker.PortBinding":
if fv.Len() != reflect.Zero(fv.Type()).Len() {
return false
}
case "bool":
if fv.Bool() {
return false
}
}
}
}
return true
}
func (d DeploymentDescription) ServiceNames() []string {
names := []string{}
if d.Services != nil {
for name, _ := range d.Services {
names = append(names, name)
}
}
return names
}
type Pattern struct {
Shared map[string][]string `json:"shared"`
}
type Encoding string
const (
JSON Encoding = "JSON"
)
func (p *Pattern) IsShared(tp string, serviceName string) bool {
entries, defined := p.Shared[tp]
if defined {
for _, n := range entries {
if n == serviceName {
return true
}
}
}
return false
}
// Service Only those marked "omitempty" may be omitted
type Service struct {
Image string `json:"image"`
VariationLabel string `json:"variation_label,omitempty"`
Privileged bool `json:"privileged"`
Environment []string `json:"environment,omitempty"`
CapAdd []string `json:"cap_add,omitempty"`
Command []string `json:"command,omitempty"`
Devices []string `json:"devices,omitempty"`
NetworkIsolation *NetworkIsolation `json:"network_isolation,omitempty"` // Changed to pointer so that the hzn dev CLI doesnt generate this struct into the deployment config skeleton
Binds []string `json:"binds,omitempty"`
Tmpfs map[string]string `json:"tmpfs,omitempty"`
Ports []docker.PortBinding `json:"ports,omitempty"`
EphemeralPorts []Port `json:"ephemeral_ports,omitempty"`
SpecificPorts []docker.PortBinding `json:"specific_ports,omitempty"` // obselete. for backward compatibility only, new way should use ports instead.
}
func (s *Service) AddFilesystemBinding(bind string) {
if s.Binds == nil {
s.Binds = make([]string, 0, 10)
}
s.Binds = append(s.Binds, bind)
}
func (s *Service) HasSpecificPortBinding() bool {
if s.SpecificPorts != nil && len(s.SpecificPorts) != 0 {
return true
}
if s.Ports != nil && len(s.Ports) != 0 {
return true
}
return false
}
func (s *Service) GetSpecificHostPortBinding() string {
p := []string{}
if s.SpecificPorts != nil && len(s.SpecificPorts) != 0 {
p = strings.Split(s.SpecificPorts[0].HostPort, ":")
} else if s.Ports != nil && len(s.Ports) != 0 {
p = strings.Split(s.Ports[0].HostPort, ":")
}
if len(p) > 0 {
port := strings.Split(p[0], "/")[0]
return port
}
return ""
}
func (s *Service) GetSpecificContainerPortBinding() string {
p := []string{}
if s.SpecificPorts != nil && len(s.SpecificPorts) != 0 {
p = strings.Split(s.SpecificPorts[0].HostPort, ":")
} else if s.Ports != nil && len(s.Ports) != 0 {
p = strings.Split(s.Ports[0].HostPort, ":")
}
if len(p) > 0 {
if len(p) < 2 {
port := strings.Split(p[0], "/")[0]
return port
} else {
port := strings.Split(p[1], "/")[0]
return port
}
}
return ""
}
func (s *Service) GetSpecificHostBinding() string {
if s.SpecificPorts != nil && len(s.SpecificPorts) != 0 {
return s.SpecificPorts[0].HostIP
} else if s.Ports != nil && len(s.Ports) != 0 {
return s.Ports[0].HostIP
}
return ""
}
func (s *Service) AddSpecificPortBinding(b docker.PortBinding) {
if s.Ports == nil {
s.Ports = make([]docker.PortBinding, 0, 5)
}
s.Ports = append(s.Ports, b)
}
type Port struct {
LocalhostOnly bool `json:"localhost_only,omitempty"`
PortAndProtocol string `json:"port_and_protocol"`
}
type DynamicOutboundPermitValue struct {
DdKey string `json:"dd_key"`
Encoding Encoding `json:"encoding"`
Path string `json:"path"`
}
func (d *DynamicOutboundPermitValue) String() string {
return fmt.Sprintf("ddKey: %v, path: %v", d.DdKey, d.Path)
}
type StaticOutboundPermitValue string
type OutboundPermitOnlyIgnore string
const (
ETH_ACCT_SPECIFIED OutboundPermitOnlyIgnore = "ETH_ACCT_SPECIFIED"
)
type OutboundPermitValue interface{}
type NetworkIsolation struct {
OutboundPermitOnlyIgnore OutboundPermitOnlyIgnore `json:"outbound_permit_only_ignore"`
OutboundPermitOnly []OutboundPermitValue `json:"outbound_permit_only"`
}
func (n *NetworkIsolation) UnmarshalJSON(data []byte) error {
type polyNType struct {
OutboundPermitOnlyIgnore OutboundPermitOnlyIgnore `json:"outbound_permit_only_ignore,omitempty"`
OutboundPermitOnly []json.RawMessage `json:"outbound_permit_only"`
}
var polyN polyNType
dec := json.NewDecoder(bytes.NewReader(data))
if err := dec.Decode(&polyN); err != nil {
return err
}
n.OutboundPermitOnlyIgnore = polyN.OutboundPermitOnlyIgnore
// dumb way you have to handle polymorphic types in golang
for _, permit := range polyN.OutboundPermitOnly {
var o OutboundPermitValue
var d DynamicOutboundPermitValue
dec := json.NewDecoder(bytes.NewReader(permit))
if err := dec.Decode(&d); err != nil {
var s StaticOutboundPermitValue
if err := json.Unmarshal(permit, &s); err != nil {
return err
}
o = s
} else {
o = d
}
n.OutboundPermitOnly = append(n.OutboundPermitOnly, o)
}
return nil
}
// Given a deployment string, unmarshal it as a native Horizon Deployment object. It might not be a native Deployment, so
// we have to verify what was just unmarshalled.
func GetNativeDeployment(depStr string) (*DeploymentDescription, error) {
dd := new(DeploymentDescription)
err := json.Unmarshal([]byte(depStr), dd)
if err != nil {
return nil, errors.New(fmt.Sprintf("error unmarshalling deployment config as DeploymentDescription: %v", err))
}
if len(dd.Services) == 0 {
return nil, errors.New(fmt.Sprintf("deployment config is not a DeploymentDescription"))
}
return dd, nil
}