617 lines
20 KiB
Go
617 lines
20 KiB
Go
package service
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/docker/docker/api/types/container"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/opts"
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runconfigopts "github.com/docker/docker/runconfig/opts"
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"github.com/spf13/pflag"
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)
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type int64Value interface {
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Value() int64
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}
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// PositiveDurationOpt is an option type for time.Duration that uses a pointer.
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// It bahave similarly to DurationOpt but only allows positive duration values.
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type PositiveDurationOpt struct {
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DurationOpt
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}
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// Set a new value on the option. Setting a negative duration value will cause
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// an error to be returned.
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func (d *PositiveDurationOpt) Set(s string) error {
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err := d.DurationOpt.Set(s)
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if err != nil {
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return err
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}
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if *d.DurationOpt.value < 0 {
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return fmt.Errorf("duration cannot be negative")
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}
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return nil
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}
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// DurationOpt is an option type for time.Duration that uses a pointer. This
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// allows us to get nil values outside, instead of defaulting to 0
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type DurationOpt struct {
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value *time.Duration
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}
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// Set a new value on the option
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func (d *DurationOpt) Set(s string) error {
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v, err := time.ParseDuration(s)
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d.value = &v
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return err
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}
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// Type returns the type of this option, which will be displayed in `--help` output
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func (d *DurationOpt) Type() string {
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return "duration"
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}
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// String returns a string repr of this option
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func (d *DurationOpt) String() string {
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if d.value != nil {
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return d.value.String()
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}
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return ""
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}
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// Value returns the time.Duration
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func (d *DurationOpt) Value() *time.Duration {
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return d.value
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}
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// Uint64Opt represents a uint64.
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type Uint64Opt struct {
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value *uint64
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}
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// Set a new value on the option
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func (i *Uint64Opt) Set(s string) error {
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v, err := strconv.ParseUint(s, 0, 64)
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i.value = &v
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return err
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}
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// Type returns the type of this option, which will be displayed in `--help` output
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func (i *Uint64Opt) Type() string {
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return "uint"
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}
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// String returns a string repr of this option
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func (i *Uint64Opt) String() string {
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if i.value != nil {
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return fmt.Sprintf("%v", *i.value)
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}
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return ""
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}
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// Value returns the uint64
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func (i *Uint64Opt) Value() *uint64 {
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return i.value
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}
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type floatValue float32
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func (f *floatValue) Set(s string) error {
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v, err := strconv.ParseFloat(s, 32)
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*f = floatValue(v)
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return err
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}
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func (f *floatValue) Type() string {
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return "float"
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}
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func (f *floatValue) String() string {
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return strconv.FormatFloat(float64(*f), 'g', -1, 32)
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}
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func (f *floatValue) Value() float32 {
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return float32(*f)
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}
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// placementPrefOpts holds a list of placement preferences.
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type placementPrefOpts struct {
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prefs []swarm.PlacementPreference
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strings []string
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}
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func (opts *placementPrefOpts) String() string {
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if len(opts.strings) == 0 {
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return ""
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}
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return fmt.Sprintf("%v", opts.strings)
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}
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// Set validates the input value and adds it to the internal slices.
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// Note: in the future strategies other than "spread", may be supported,
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// as well as additional comma-separated options.
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func (opts *placementPrefOpts) Set(value string) error {
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fields := strings.Split(value, "=")
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if len(fields) != 2 {
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return errors.New(`placement preference must be of the format "<strategy>=<arg>"`)
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}
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if fields[0] != "spread" {
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return fmt.Errorf("unsupported placement preference %s (only spread is supported)", fields[0])
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}
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opts.prefs = append(opts.prefs, swarm.PlacementPreference{
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Spread: &swarm.SpreadOver{
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SpreadDescriptor: fields[1],
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},
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})
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opts.strings = append(opts.strings, value)
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return nil
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}
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// Type returns a string name for this Option type
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func (opts *placementPrefOpts) Type() string {
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return "pref"
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}
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type updateOptions struct {
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parallelism uint64
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delay time.Duration
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monitor time.Duration
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onFailure string
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maxFailureRatio floatValue
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}
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func (opts updateOptions) config() *swarm.UpdateConfig {
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return &swarm.UpdateConfig{
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Parallelism: opts.parallelism,
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Delay: opts.delay,
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Monitor: opts.monitor,
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FailureAction: opts.onFailure,
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MaxFailureRatio: opts.maxFailureRatio.Value(),
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}
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}
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type resourceOptions struct {
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limitCPU opts.NanoCPUs
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limitMemBytes opts.MemBytes
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resCPU opts.NanoCPUs
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resMemBytes opts.MemBytes
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}
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func (r *resourceOptions) ToResourceRequirements() *swarm.ResourceRequirements {
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return &swarm.ResourceRequirements{
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Limits: &swarm.Resources{
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NanoCPUs: r.limitCPU.Value(),
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MemoryBytes: r.limitMemBytes.Value(),
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},
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Reservations: &swarm.Resources{
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NanoCPUs: r.resCPU.Value(),
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MemoryBytes: r.resMemBytes.Value(),
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},
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}
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}
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type restartPolicyOptions struct {
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condition string
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delay DurationOpt
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maxAttempts Uint64Opt
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window DurationOpt
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}
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func (r *restartPolicyOptions) ToRestartPolicy() *swarm.RestartPolicy {
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return &swarm.RestartPolicy{
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Condition: swarm.RestartPolicyCondition(r.condition),
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Delay: r.delay.Value(),
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MaxAttempts: r.maxAttempts.Value(),
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Window: r.window.Value(),
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}
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}
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func convertNetworks(networks []string) []swarm.NetworkAttachmentConfig {
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nets := []swarm.NetworkAttachmentConfig{}
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for _, network := range networks {
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nets = append(nets, swarm.NetworkAttachmentConfig{Target: network})
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}
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return nets
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}
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type endpointOptions struct {
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mode string
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publishPorts opts.PortOpt
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}
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func (e *endpointOptions) ToEndpointSpec() *swarm.EndpointSpec {
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return &swarm.EndpointSpec{
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Mode: swarm.ResolutionMode(strings.ToLower(e.mode)),
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Ports: e.publishPorts.Value(),
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}
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}
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type logDriverOptions struct {
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name string
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opts opts.ListOpts
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}
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func newLogDriverOptions() logDriverOptions {
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return logDriverOptions{opts: opts.NewListOpts(opts.ValidateEnv)}
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}
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func (ldo *logDriverOptions) toLogDriver() *swarm.Driver {
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if ldo.name == "" {
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return nil
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}
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// set the log driver only if specified.
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return &swarm.Driver{
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Name: ldo.name,
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Options: runconfigopts.ConvertKVStringsToMap(ldo.opts.GetAll()),
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}
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}
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type healthCheckOptions struct {
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cmd string
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interval PositiveDurationOpt
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timeout PositiveDurationOpt
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retries int
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noHealthcheck bool
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}
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func (opts *healthCheckOptions) toHealthConfig() (*container.HealthConfig, error) {
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var healthConfig *container.HealthConfig
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haveHealthSettings := opts.cmd != "" ||
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opts.interval.Value() != nil ||
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opts.timeout.Value() != nil ||
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opts.retries != 0
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if opts.noHealthcheck {
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if haveHealthSettings {
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return nil, fmt.Errorf("--%s conflicts with --health-* options", flagNoHealthcheck)
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}
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healthConfig = &container.HealthConfig{Test: []string{"NONE"}}
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} else if haveHealthSettings {
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var test []string
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if opts.cmd != "" {
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test = []string{"CMD-SHELL", opts.cmd}
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}
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var interval, timeout time.Duration
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if ptr := opts.interval.Value(); ptr != nil {
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interval = *ptr
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}
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if ptr := opts.timeout.Value(); ptr != nil {
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timeout = *ptr
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}
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healthConfig = &container.HealthConfig{
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Test: test,
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Interval: interval,
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Timeout: timeout,
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Retries: opts.retries,
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}
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}
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return healthConfig, nil
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}
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// convertExtraHostsToSwarmHosts converts an array of extra hosts in cli
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// <host>:<ip>
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// into a swarmkit host format:
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// IP_address canonical_hostname [aliases...]
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// This assumes input value (<host>:<ip>) has already been validated
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func convertExtraHostsToSwarmHosts(extraHosts []string) []string {
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hosts := []string{}
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for _, extraHost := range extraHosts {
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parts := strings.SplitN(extraHost, ":", 2)
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hosts = append(hosts, fmt.Sprintf("%s %s", parts[1], parts[0]))
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}
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return hosts
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}
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type serviceOptions struct {
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name string
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labels opts.ListOpts
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containerLabels opts.ListOpts
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image string
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args []string
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hostname string
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env opts.ListOpts
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envFile opts.ListOpts
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workdir string
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user string
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groups opts.ListOpts
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stopSignal string
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tty bool
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readOnly bool
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mounts opts.MountOpt
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dns opts.ListOpts
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dnsSearch opts.ListOpts
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dnsOption opts.ListOpts
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hosts opts.ListOpts
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resources resourceOptions
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stopGrace DurationOpt
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replicas Uint64Opt
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mode string
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restartPolicy restartPolicyOptions
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constraints opts.ListOpts
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placementPrefs placementPrefOpts
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update updateOptions
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rollback updateOptions
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networks opts.ListOpts
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endpoint endpointOptions
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registryAuth bool
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logDriver logDriverOptions
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healthcheck healthCheckOptions
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secrets opts.SecretOpt
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}
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func newServiceOptions() *serviceOptions {
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return &serviceOptions{
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labels: opts.NewListOpts(opts.ValidateEnv),
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constraints: opts.NewListOpts(nil),
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containerLabels: opts.NewListOpts(opts.ValidateEnv),
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env: opts.NewListOpts(opts.ValidateEnv),
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envFile: opts.NewListOpts(nil),
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groups: opts.NewListOpts(nil),
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logDriver: newLogDriverOptions(),
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dns: opts.NewListOpts(opts.ValidateIPAddress),
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dnsOption: opts.NewListOpts(nil),
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dnsSearch: opts.NewListOpts(opts.ValidateDNSSearch),
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hosts: opts.NewListOpts(opts.ValidateExtraHost),
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networks: opts.NewListOpts(nil),
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}
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}
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func (opts *serviceOptions) ToServiceMode() (swarm.ServiceMode, error) {
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serviceMode := swarm.ServiceMode{}
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switch opts.mode {
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case "global":
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if opts.replicas.Value() != nil {
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return serviceMode, fmt.Errorf("replicas can only be used with replicated mode")
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}
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serviceMode.Global = &swarm.GlobalService{}
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case "replicated":
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serviceMode.Replicated = &swarm.ReplicatedService{
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Replicas: opts.replicas.Value(),
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}
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default:
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return serviceMode, fmt.Errorf("Unknown mode: %s, only replicated and global supported", opts.mode)
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}
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return serviceMode, nil
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}
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func (opts *serviceOptions) ToService() (swarm.ServiceSpec, error) {
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var service swarm.ServiceSpec
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envVariables, err := runconfigopts.ReadKVStrings(opts.envFile.GetAll(), opts.env.GetAll())
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if err != nil {
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return service, err
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}
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currentEnv := make([]string, 0, len(envVariables))
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for _, env := range envVariables { // need to process each var, in order
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k := strings.SplitN(env, "=", 2)[0]
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for i, current := range currentEnv { // remove duplicates
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if current == env {
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continue // no update required, may hide this behind flag to preserve order of envVariables
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}
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if strings.HasPrefix(current, k+"=") {
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currentEnv = append(currentEnv[:i], currentEnv[i+1:]...)
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}
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}
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currentEnv = append(currentEnv, env)
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}
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healthConfig, err := opts.healthcheck.toHealthConfig()
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if err != nil {
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return service, err
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}
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serviceMode, err := opts.ToServiceMode()
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if err != nil {
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return service, err
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}
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service = swarm.ServiceSpec{
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Annotations: swarm.Annotations{
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Name: opts.name,
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Labels: runconfigopts.ConvertKVStringsToMap(opts.labels.GetAll()),
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},
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TaskTemplate: swarm.TaskSpec{
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ContainerSpec: swarm.ContainerSpec{
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Image: opts.image,
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Args: opts.args,
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Env: currentEnv,
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Hostname: opts.hostname,
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Labels: runconfigopts.ConvertKVStringsToMap(opts.containerLabels.GetAll()),
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Dir: opts.workdir,
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User: opts.user,
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Groups: opts.groups.GetAll(),
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StopSignal: opts.stopSignal,
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TTY: opts.tty,
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ReadOnly: opts.readOnly,
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Mounts: opts.mounts.Value(),
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DNSConfig: &swarm.DNSConfig{
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Nameservers: opts.dns.GetAll(),
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Search: opts.dnsSearch.GetAll(),
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Options: opts.dnsOption.GetAll(),
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},
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Hosts: convertExtraHostsToSwarmHosts(opts.hosts.GetAll()),
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StopGracePeriod: opts.stopGrace.Value(),
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Secrets: nil,
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Healthcheck: healthConfig,
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},
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Networks: convertNetworks(opts.networks.GetAll()),
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Resources: opts.resources.ToResourceRequirements(),
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RestartPolicy: opts.restartPolicy.ToRestartPolicy(),
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Placement: &swarm.Placement{
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Constraints: opts.constraints.GetAll(),
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Preferences: opts.placementPrefs.prefs,
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},
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LogDriver: opts.logDriver.toLogDriver(),
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},
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Networks: convertNetworks(opts.networks.GetAll()),
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Mode: serviceMode,
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UpdateConfig: opts.update.config(),
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RollbackConfig: opts.rollback.config(),
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EndpointSpec: opts.endpoint.ToEndpointSpec(),
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}
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return service, nil
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}
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// addServiceFlags adds all flags that are common to both `create` and `update`.
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// Any flags that are not common are added separately in the individual command
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func addServiceFlags(flags *pflag.FlagSet, opts *serviceOptions) {
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flags.StringVarP(&opts.workdir, flagWorkdir, "w", "", "Working directory inside the container")
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flags.StringVarP(&opts.user, flagUser, "u", "", "Username or UID (format: <name|uid>[:<group|gid>])")
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flags.StringVar(&opts.hostname, flagHostname, "", "Container hostname")
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flags.SetAnnotation(flagHostname, "version", []string{"1.25"})
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flags.Var(&opts.resources.limitCPU, flagLimitCPU, "Limit CPUs")
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flags.Var(&opts.resources.limitMemBytes, flagLimitMemory, "Limit Memory")
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flags.Var(&opts.resources.resCPU, flagReserveCPU, "Reserve CPUs")
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flags.Var(&opts.resources.resMemBytes, flagReserveMemory, "Reserve Memory")
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flags.Var(&opts.stopGrace, flagStopGracePeriod, "Time to wait before force killing a container (ns|us|ms|s|m|h)")
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flags.Var(&opts.replicas, flagReplicas, "Number of tasks")
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flags.StringVar(&opts.restartPolicy.condition, flagRestartCondition, "", `Restart when condition is met ("none"|"on-failure"|"any")`)
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flags.Var(&opts.restartPolicy.delay, flagRestartDelay, "Delay between restart attempts (ns|us|ms|s|m|h)")
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flags.Var(&opts.restartPolicy.maxAttempts, flagRestartMaxAttempts, "Maximum number of restarts before giving up")
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flags.Var(&opts.restartPolicy.window, flagRestartWindow, "Window used to evaluate the restart policy (ns|us|ms|s|m|h)")
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flags.Uint64Var(&opts.update.parallelism, flagUpdateParallelism, 1, "Maximum number of tasks updated simultaneously (0 to update all at once)")
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flags.DurationVar(&opts.update.delay, flagUpdateDelay, time.Duration(0), "Delay between updates (ns|us|ms|s|m|h) (default 0s)")
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flags.DurationVar(&opts.update.monitor, flagUpdateMonitor, time.Duration(0), "Duration after each task update to monitor for failure (ns|us|ms|s|m|h)")
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flags.SetAnnotation(flagUpdateMonitor, "version", []string{"1.25"})
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flags.StringVar(&opts.update.onFailure, flagUpdateFailureAction, "pause", `Action on update failure ("pause"|"continue"|"rollback")`)
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flags.Var(&opts.update.maxFailureRatio, flagUpdateMaxFailureRatio, "Failure rate to tolerate during an update")
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flags.SetAnnotation(flagUpdateMaxFailureRatio, "version", []string{"1.25"})
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flags.Uint64Var(&opts.rollback.parallelism, flagRollbackParallelism, 1, "Maximum number of tasks rolled back simultaneously (0 to roll back all at once)")
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flags.SetAnnotation(flagRollbackParallelism, "version", []string{"1.28"})
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flags.DurationVar(&opts.rollback.delay, flagRollbackDelay, time.Duration(0), "Delay between task rollbacks (ns|us|ms|s|m|h) (default 0s)")
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flags.SetAnnotation(flagRollbackDelay, "version", []string{"1.28"})
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flags.DurationVar(&opts.rollback.monitor, flagRollbackMonitor, time.Duration(0), "Duration after each task rollback to monitor for failure (ns|us|ms|s|m|h) (default 0s)")
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flags.SetAnnotation(flagRollbackMonitor, "version", []string{"1.28"})
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flags.StringVar(&opts.rollback.onFailure, flagRollbackFailureAction, "pause", `Action on rollback failure ("pause"|"continue")`)
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flags.SetAnnotation(flagRollbackFailureAction, "version", []string{"1.28"})
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flags.Var(&opts.rollback.maxFailureRatio, flagRollbackMaxFailureRatio, "Failure rate to tolerate during a rollback")
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flags.SetAnnotation(flagRollbackMaxFailureRatio, "version", []string{"1.28"})
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flags.StringVar(&opts.endpoint.mode, flagEndpointMode, "vip", "Endpoint mode (vip or dnsrr)")
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flags.BoolVar(&opts.registryAuth, flagRegistryAuth, false, "Send registry authentication details to swarm agents")
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flags.StringVar(&opts.logDriver.name, flagLogDriver, "", "Logging driver for service")
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flags.Var(&opts.logDriver.opts, flagLogOpt, "Logging driver options")
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flags.StringVar(&opts.healthcheck.cmd, flagHealthCmd, "", "Command to run to check health")
|
|
flags.SetAnnotation(flagHealthCmd, "version", []string{"1.25"})
|
|
flags.Var(&opts.healthcheck.interval, flagHealthInterval, "Time between running the check (ns|us|ms|s|m|h)")
|
|
flags.SetAnnotation(flagHealthInterval, "version", []string{"1.25"})
|
|
flags.Var(&opts.healthcheck.timeout, flagHealthTimeout, "Maximum time to allow one check to run (ns|us|ms|s|m|h)")
|
|
flags.SetAnnotation(flagHealthTimeout, "version", []string{"1.25"})
|
|
flags.IntVar(&opts.healthcheck.retries, flagHealthRetries, 0, "Consecutive failures needed to report unhealthy")
|
|
flags.SetAnnotation(flagHealthRetries, "version", []string{"1.25"})
|
|
flags.BoolVar(&opts.healthcheck.noHealthcheck, flagNoHealthcheck, false, "Disable any container-specified HEALTHCHECK")
|
|
flags.SetAnnotation(flagNoHealthcheck, "version", []string{"1.25"})
|
|
|
|
flags.BoolVarP(&opts.tty, flagTTY, "t", false, "Allocate a pseudo-TTY")
|
|
flags.SetAnnotation(flagTTY, "version", []string{"1.25"})
|
|
|
|
flags.BoolVar(&opts.readOnly, flagReadOnly, false, "Mount the container's root filesystem as read only")
|
|
flags.SetAnnotation(flagReadOnly, "version", []string{"1.28"})
|
|
|
|
flags.StringVar(&opts.stopSignal, flagStopSignal, "", "Signal to stop the container")
|
|
flags.SetAnnotation(flagStopSignal, "version", []string{"1.28"})
|
|
}
|
|
|
|
const (
|
|
flagPlacementPref = "placement-pref"
|
|
flagPlacementPrefAdd = "placement-pref-add"
|
|
flagPlacementPrefRemove = "placement-pref-rm"
|
|
flagConstraint = "constraint"
|
|
flagConstraintRemove = "constraint-rm"
|
|
flagConstraintAdd = "constraint-add"
|
|
flagContainerLabel = "container-label"
|
|
flagContainerLabelRemove = "container-label-rm"
|
|
flagContainerLabelAdd = "container-label-add"
|
|
flagDNS = "dns"
|
|
flagDNSRemove = "dns-rm"
|
|
flagDNSAdd = "dns-add"
|
|
flagDNSOption = "dns-option"
|
|
flagDNSOptionRemove = "dns-option-rm"
|
|
flagDNSOptionAdd = "dns-option-add"
|
|
flagDNSSearch = "dns-search"
|
|
flagDNSSearchRemove = "dns-search-rm"
|
|
flagDNSSearchAdd = "dns-search-add"
|
|
flagEndpointMode = "endpoint-mode"
|
|
flagHost = "host"
|
|
flagHostAdd = "host-add"
|
|
flagHostRemove = "host-rm"
|
|
flagHostname = "hostname"
|
|
flagEnv = "env"
|
|
flagEnvFile = "env-file"
|
|
flagEnvRemove = "env-rm"
|
|
flagEnvAdd = "env-add"
|
|
flagGroup = "group"
|
|
flagGroupAdd = "group-add"
|
|
flagGroupRemove = "group-rm"
|
|
flagLabel = "label"
|
|
flagLabelRemove = "label-rm"
|
|
flagLabelAdd = "label-add"
|
|
flagLimitCPU = "limit-cpu"
|
|
flagLimitMemory = "limit-memory"
|
|
flagMode = "mode"
|
|
flagMount = "mount"
|
|
flagMountRemove = "mount-rm"
|
|
flagMountAdd = "mount-add"
|
|
flagName = "name"
|
|
flagNetwork = "network"
|
|
flagPublish = "publish"
|
|
flagPublishRemove = "publish-rm"
|
|
flagPublishAdd = "publish-add"
|
|
flagReadOnly = "read-only"
|
|
flagReplicas = "replicas"
|
|
flagReserveCPU = "reserve-cpu"
|
|
flagReserveMemory = "reserve-memory"
|
|
flagRestartCondition = "restart-condition"
|
|
flagRestartDelay = "restart-delay"
|
|
flagRestartMaxAttempts = "restart-max-attempts"
|
|
flagRestartWindow = "restart-window"
|
|
flagRollbackDelay = "rollback-delay"
|
|
flagRollbackFailureAction = "rollback-failure-action"
|
|
flagRollbackMaxFailureRatio = "rollback-max-failure-ratio"
|
|
flagRollbackMonitor = "rollback-monitor"
|
|
flagRollbackParallelism = "rollback-parallelism"
|
|
flagStopGracePeriod = "stop-grace-period"
|
|
flagStopSignal = "stop-signal"
|
|
flagTTY = "tty"
|
|
flagUpdateDelay = "update-delay"
|
|
flagUpdateFailureAction = "update-failure-action"
|
|
flagUpdateMaxFailureRatio = "update-max-failure-ratio"
|
|
flagUpdateMonitor = "update-monitor"
|
|
flagUpdateParallelism = "update-parallelism"
|
|
flagUser = "user"
|
|
flagWorkdir = "workdir"
|
|
flagRegistryAuth = "with-registry-auth"
|
|
flagLogDriver = "log-driver"
|
|
flagLogOpt = "log-opt"
|
|
flagHealthCmd = "health-cmd"
|
|
flagHealthInterval = "health-interval"
|
|
flagHealthRetries = "health-retries"
|
|
flagHealthTimeout = "health-timeout"
|
|
flagNoHealthcheck = "no-healthcheck"
|
|
flagSecret = "secret"
|
|
flagSecretAdd = "secret-add"
|
|
flagSecretRemove = "secret-rm"
|
|
)
|