DockerCLI/cli/command/stack/kubernetes/convert.go

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package kubernetes
import (
"io"
"io/ioutil"
"regexp"
"strconv"
"strings"
"github.com/docker/cli/cli/compose/loader"
"github.com/docker/cli/cli/compose/schema"
composeTypes "github.com/docker/cli/cli/compose/types"
composetypes "github.com/docker/cli/cli/compose/types"
"github.com/docker/cli/kubernetes/compose/v1beta1"
"github.com/docker/cli/kubernetes/compose/v1beta2"
"github.com/pkg/errors"
yaml "gopkg.in/yaml.v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// NewStackConverter returns a converter from types.Config (compose) to the specified
// stack version or error out if the version is not supported or existent.
func NewStackConverter(version string) (StackConverter, error) {
switch version {
case "v1beta1":
return stackV1Beta1Converter{}, nil
case "v1beta2":
return stackV1Beta2Converter{}, nil
default:
return nil, errors.Errorf("stack version %s unsupported", version)
}
}
// StackConverter converts a compose types.Config to a Stack
type StackConverter interface {
FromCompose(stderr io.Writer, name string, cfg *composetypes.Config) (Stack, error)
}
type stackV1Beta1Converter struct{}
func (s stackV1Beta1Converter) FromCompose(stderr io.Writer, name string, cfg *composetypes.Config) (Stack, error) {
cfg.Version = v1beta1.MaxComposeVersion
st, err := fromCompose(stderr, name, cfg)
if err != nil {
return Stack{}, err
}
res, err := yaml.Marshal(cfg)
if err != nil {
return Stack{}, err
}
// reload the result to check that it produced a valid 3.5 compose file
resparsedConfig, err := loader.ParseYAML(res)
if err != nil {
return Stack{}, err
}
if err = schema.Validate(resparsedConfig, v1beta1.MaxComposeVersion); err != nil {
return Stack{}, errors.Wrapf(err, "the compose yaml file is invalid with v%s", v1beta1.MaxComposeVersion)
}
st.ComposeFile = string(res)
return st, nil
}
type stackV1Beta2Converter struct{}
func (s stackV1Beta2Converter) FromCompose(stderr io.Writer, name string, cfg *composetypes.Config) (Stack, error) {
return fromCompose(stderr, name, cfg)
}
func fromCompose(stderr io.Writer, name string, cfg *composetypes.Config) (Stack, error) {
return Stack{
Name: name,
Spec: fromComposeConfig(stderr, cfg),
}, nil
}
func loadStackData(composefile string) (*composetypes.Config, error) {
parsed, err := loader.ParseYAML([]byte(composefile))
if err != nil {
return nil, err
}
return loader.Load(composetypes.ConfigDetails{
ConfigFiles: []composetypes.ConfigFile{
{
Config: parsed,
},
},
})
}
// Conversions from internal stack to different stack compose component versions.
func stackFromV1beta1(in *v1beta1.Stack) (Stack, error) {
cfg, err := loadStackData(in.Spec.ComposeFile)
if err != nil {
return Stack{}, err
}
return Stack{
Name: in.ObjectMeta.Name,
Namespace: in.ObjectMeta.Namespace,
ComposeFile: in.Spec.ComposeFile,
Spec: fromComposeConfig(ioutil.Discard, cfg),
}, nil
}
func stackToV1beta1(s Stack) *v1beta1.Stack {
return &v1beta1.Stack{
ObjectMeta: metav1.ObjectMeta{
Name: s.Name,
},
Spec: v1beta1.StackSpec{
ComposeFile: s.ComposeFile,
},
}
}
func stackFromV1beta2(in *v1beta2.Stack) Stack {
return Stack{
Name: in.ObjectMeta.Name,
Namespace: in.ObjectMeta.Namespace,
Spec: in.Spec,
}
}
func stackToV1beta2(s Stack) *v1beta2.Stack {
return &v1beta2.Stack{
ObjectMeta: metav1.ObjectMeta{
Name: s.Name,
},
Spec: s.Spec,
}
}
func fromComposeConfig(stderr io.Writer, c *composeTypes.Config) *v1beta2.StackSpec {
if c == nil {
return nil
}
warnUnsupportedFeatures(stderr, c)
serviceConfigs := make([]v1beta2.ServiceConfig, len(c.Services))
for i, s := range c.Services {
serviceConfigs[i] = fromComposeServiceConfig(s)
}
return &v1beta2.StackSpec{
Services: serviceConfigs,
Secrets: fromComposeSecrets(c.Secrets),
Configs: fromComposeConfigs(c.Configs),
}
}
func fromComposeSecrets(s map[string]composeTypes.SecretConfig) map[string]v1beta2.SecretConfig {
if s == nil {
return nil
}
m := map[string]v1beta2.SecretConfig{}
for key, value := range s {
m[key] = v1beta2.SecretConfig{
Name: value.Name,
File: value.File,
External: v1beta2.External{
Name: value.External.Name,
External: value.External.External,
},
Labels: value.Labels,
}
}
return m
}
func fromComposeConfigs(s map[string]composeTypes.ConfigObjConfig) map[string]v1beta2.ConfigObjConfig {
if s == nil {
return nil
}
m := map[string]v1beta2.ConfigObjConfig{}
for key, value := range s {
m[key] = v1beta2.ConfigObjConfig{
Name: value.Name,
File: value.File,
External: v1beta2.External{
Name: value.External.Name,
External: value.External.External,
},
Labels: value.Labels,
}
}
return m
}
func fromComposeServiceConfig(s composeTypes.ServiceConfig) v1beta2.ServiceConfig {
var userID *int64
if s.User != "" {
numerical, err := strconv.Atoi(s.User)
if err == nil {
unixUserID := int64(numerical)
userID = &unixUserID
}
}
return v1beta2.ServiceConfig{
Name: s.Name,
CapAdd: s.CapAdd,
CapDrop: s.CapDrop,
Command: s.Command,
Configs: fromComposeServiceConfigs(s.Configs),
Deploy: v1beta2.DeployConfig{
Mode: s.Deploy.Mode,
Replicas: s.Deploy.Replicas,
Labels: s.Deploy.Labels,
UpdateConfig: fromComposeUpdateConfig(s.Deploy.UpdateConfig),
Resources: fromComposeResources(s.Deploy.Resources),
RestartPolicy: fromComposeRestartPolicy(s.Deploy.RestartPolicy),
Placement: fromComposePlacement(s.Deploy.Placement),
},
Entrypoint: s.Entrypoint,
Environment: s.Environment,
ExtraHosts: s.ExtraHosts,
Hostname: s.Hostname,
HealthCheck: fromComposeHealthcheck(s.HealthCheck),
Image: s.Image,
Ipc: s.Ipc,
Labels: s.Labels,
Pid: s.Pid,
Ports: fromComposePorts(s.Ports),
Privileged: s.Privileged,
ReadOnly: s.ReadOnly,
Secrets: fromComposeServiceSecrets(s.Secrets),
StdinOpen: s.StdinOpen,
StopGracePeriod: s.StopGracePeriod,
Tmpfs: s.Tmpfs,
Tty: s.Tty,
User: userID,
Volumes: fromComposeServiceVolumeConfig(s.Volumes),
WorkingDir: s.WorkingDir,
}
}
func fromComposePorts(ports []composeTypes.ServicePortConfig) []v1beta2.ServicePortConfig {
if ports == nil {
return nil
}
p := make([]v1beta2.ServicePortConfig, len(ports))
for i, port := range ports {
p[i] = v1beta2.ServicePortConfig{
Mode: port.Mode,
Target: port.Target,
Published: port.Published,
Protocol: port.Protocol,
}
}
return p
}
func fromComposeServiceSecrets(secrets []composeTypes.ServiceSecretConfig) []v1beta2.ServiceSecretConfig {
if secrets == nil {
return nil
}
c := make([]v1beta2.ServiceSecretConfig, len(secrets))
for i, secret := range secrets {
c[i] = v1beta2.ServiceSecretConfig{
Source: secret.Source,
Target: secret.Target,
UID: secret.UID,
Mode: secret.Mode,
}
}
return c
}
func fromComposeServiceConfigs(configs []composeTypes.ServiceConfigObjConfig) []v1beta2.ServiceConfigObjConfig {
if configs == nil {
return nil
}
c := make([]v1beta2.ServiceConfigObjConfig, len(configs))
for i, config := range configs {
c[i] = v1beta2.ServiceConfigObjConfig{
Source: config.Source,
Target: config.Target,
UID: config.UID,
Mode: config.Mode,
}
}
return c
}
func fromComposeHealthcheck(h *composeTypes.HealthCheckConfig) *v1beta2.HealthCheckConfig {
if h == nil {
return nil
}
return &v1beta2.HealthCheckConfig{
Test: h.Test,
Timeout: h.Timeout,
Interval: h.Interval,
Retries: h.Retries,
}
}
func fromComposePlacement(p composeTypes.Placement) v1beta2.Placement {
return v1beta2.Placement{
Constraints: fromComposeConstraints(p.Constraints),
}
}
var constraintEquals = regexp.MustCompile(`([\w\.]*)\W*(==|!=)\W*([\w\.]*)`)
const (
swarmOs = "node.platform.os"
swarmArch = "node.platform.arch"
swarmHostname = "node.hostname"
swarmLabelPrefix = "node.labels."
)
func fromComposeConstraints(s []string) *v1beta2.Constraints {
if len(s) == 0 {
return nil
}
constraints := &v1beta2.Constraints{}
for _, constraint := range s {
matches := constraintEquals.FindStringSubmatch(constraint)
if len(matches) == 4 {
key := matches[1]
operator := matches[2]
value := matches[3]
constraint := &v1beta2.Constraint{
Operator: operator,
Value: value,
}
switch {
case key == swarmOs:
constraints.OperatingSystem = constraint
case key == swarmArch:
constraints.Architecture = constraint
case key == swarmHostname:
constraints.Hostname = constraint
case strings.HasPrefix(key, swarmLabelPrefix):
if constraints.MatchLabels == nil {
constraints.MatchLabels = map[string]v1beta2.Constraint{}
}
constraints.MatchLabels[strings.TrimPrefix(key, swarmLabelPrefix)] = *constraint
}
}
}
return constraints
}
func fromComposeResources(r composeTypes.Resources) v1beta2.Resources {
return v1beta2.Resources{
Limits: fromComposeResourcesResource(r.Limits),
Reservations: fromComposeResourcesResource(r.Reservations),
}
}
func fromComposeResourcesResource(r *composeTypes.Resource) *v1beta2.Resource {
if r == nil {
return nil
}
return &v1beta2.Resource{
MemoryBytes: int64(r.MemoryBytes),
NanoCPUs: r.NanoCPUs,
}
}
func fromComposeUpdateConfig(u *composeTypes.UpdateConfig) *v1beta2.UpdateConfig {
if u == nil {
return nil
}
return &v1beta2.UpdateConfig{
Parallelism: u.Parallelism,
}
}
func fromComposeRestartPolicy(r *composeTypes.RestartPolicy) *v1beta2.RestartPolicy {
if r == nil {
return nil
}
return &v1beta2.RestartPolicy{
Condition: r.Condition,
}
}
func fromComposeServiceVolumeConfig(vs []composeTypes.ServiceVolumeConfig) []v1beta2.ServiceVolumeConfig {
if vs == nil {
return nil
}
volumes := []v1beta2.ServiceVolumeConfig{}
for _, v := range vs {
volumes = append(volumes, v1beta2.ServiceVolumeConfig{
Type: v.Type,
Source: v.Source,
Target: v.Target,
ReadOnly: v.ReadOnly,
})
}
return volumes
}