mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-28 19:34:58 +01:00
658 lines
16 KiB
Go
658 lines
16 KiB
Go
package config
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import (
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"fmt"
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"io/ioutil"
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"log/syslog"
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"os"
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"reflect"
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"regexp"
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"strconv"
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"time"
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"github.com/pkg/errors"
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"github.com/zrepl/yaml-config"
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)
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type Config struct {
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Jobs []JobEnum `yaml:"jobs"`
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Global *Global `yaml:"global,optional,fromdefaults"`
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}
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func (c *Config) Job(name string) (*JobEnum, error) {
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for _, j := range c.Jobs {
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if j.Name() == name {
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return &j, nil
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}
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}
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return nil, fmt.Errorf("job %q not defined in config", name)
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}
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type JobEnum struct {
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Ret interface{}
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}
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func (j JobEnum) Name() string {
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var name string
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switch v := j.Ret.(type) {
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case *SnapJob:
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name = v.Name
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case *PushJob:
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name = v.Name
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case *SinkJob:
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name = v.Name
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case *PullJob:
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name = v.Name
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case *SourceJob:
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name = v.Name
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default:
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panic(fmt.Sprintf("unknown job type %T", v))
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}
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return name
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}
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type ActiveJob struct {
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Type string `yaml:"type"`
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Name string `yaml:"name"`
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Connect ConnectEnum `yaml:"connect"`
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Pruning PruningSenderReceiver `yaml:"pruning"`
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Debug JobDebugSettings `yaml:"debug,optional"`
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}
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type PassiveJob struct {
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Type string `yaml:"type"`
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Name string `yaml:"name"`
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Serve ServeEnum `yaml:"serve"`
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Debug JobDebugSettings `yaml:"debug,optional"`
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}
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type SnapJob struct {
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Type string `yaml:"type"`
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Name string `yaml:"name"`
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Pruning PruningLocal `yaml:"pruning"`
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Debug JobDebugSettings `yaml:"debug,optional"`
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Snapshotting SnapshottingEnum `yaml:"snapshotting"`
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Filesystems FilesystemsFilter `yaml:"filesystems"`
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}
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type SendOptions struct {
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Encrypted bool `yaml:"encrypted"`
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}
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var _ yaml.Defaulter = (*SendOptions)(nil)
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func (l *SendOptions) SetDefault() {
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*l = SendOptions{Encrypted: false}
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}
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type RecvOptions struct {
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// Note: we cannot enforce encrypted recv as the ZFS cli doesn't provide a mechanism for it
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// Encrypted bool `yaml:"may_encrypted"`
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// Future:
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// Reencrypt bool `yaml:"reencrypt"`
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}
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var _ yaml.Defaulter = (*RecvOptions)(nil)
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func (l *RecvOptions) SetDefault() {
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*l = RecvOptions{}
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}
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type PushJob struct {
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ActiveJob `yaml:",inline"`
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Snapshotting SnapshottingEnum `yaml:"snapshotting"`
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Filesystems FilesystemsFilter `yaml:"filesystems"`
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Send *SendOptions `yaml:"send,fromdefaults,optional"`
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}
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type PullJob struct {
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ActiveJob `yaml:",inline"`
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RootFS string `yaml:"root_fs"`
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Interval PositiveDurationOrManual `yaml:"interval"`
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Recv *RecvOptions `yaml:"recv,fromdefaults,optional"`
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}
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type PositiveDurationOrManual struct {
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Interval time.Duration
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Manual bool
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}
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var _ yaml.Unmarshaler = (*PositiveDurationOrManual)(nil)
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func (i *PositiveDurationOrManual) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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var s string
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if err := u(&s, true); err != nil {
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return err
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}
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switch s {
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case "manual":
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i.Manual = true
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i.Interval = 0
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case "":
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return fmt.Errorf("value must not be empty")
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default:
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i.Manual = false
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i.Interval, err = time.ParseDuration(s)
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if err != nil {
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return err
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}
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if i.Interval <= 0 {
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return fmt.Errorf("value must be a positive duration, got %q", s)
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}
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}
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return nil
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}
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type SinkJob struct {
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PassiveJob `yaml:",inline"`
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RootFS string `yaml:"root_fs"`
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Recv *RecvOptions `yaml:"recv,optional,fromdefaults"`
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}
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type SourceJob struct {
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PassiveJob `yaml:",inline"`
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Snapshotting SnapshottingEnum `yaml:"snapshotting"`
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Filesystems FilesystemsFilter `yaml:"filesystems"`
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Send *SendOptions `yaml:"send,optional,fromdefaults"`
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}
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type FilesystemsFilter map[string]bool
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type SnapshottingEnum struct {
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Ret interface{}
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}
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type SnapshottingPeriodic struct {
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Type string `yaml:"type"`
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Prefix string `yaml:"prefix"`
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Interval time.Duration `yaml:"interval,positive"`
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Hooks HookList `yaml:"hooks,optional"`
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}
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type SnapshottingManual struct {
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Type string `yaml:"type"`
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}
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type PruningSenderReceiver struct {
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KeepSender []PruningEnum `yaml:"keep_sender"`
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KeepReceiver []PruningEnum `yaml:"keep_receiver"`
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}
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type PruningLocal struct {
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Keep []PruningEnum `yaml:"keep"`
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}
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type LoggingOutletEnumList []LoggingOutletEnum
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func (l *LoggingOutletEnumList) SetDefault() {
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def := `
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type: "stdout"
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time: true
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level: "warn"
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format: "human"
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`
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s := &StdoutLoggingOutlet{}
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err := yaml.UnmarshalStrict([]byte(def), &s)
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if err != nil {
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panic(err)
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}
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*l = []LoggingOutletEnum{LoggingOutletEnum{Ret: s}}
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}
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var _ yaml.Defaulter = &LoggingOutletEnumList{}
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type Global struct {
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Logging *LoggingOutletEnumList `yaml:"logging,optional,fromdefaults"`
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Monitoring []MonitoringEnum `yaml:"monitoring,optional"`
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Control *GlobalControl `yaml:"control,optional,fromdefaults"`
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Serve *GlobalServe `yaml:"serve,optional,fromdefaults"`
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}
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func Default(i interface{}) {
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v := reflect.ValueOf(i)
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if v.Kind() != reflect.Ptr {
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panic(v)
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}
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y := `{}`
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err := yaml.Unmarshal([]byte(y), v.Interface())
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if err != nil {
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panic(err)
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}
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}
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type ConnectEnum struct {
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Ret interface{}
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}
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type ConnectCommon struct {
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Type string `yaml:"type"`
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}
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type TCPConnect struct {
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ConnectCommon `yaml:",inline"`
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Address string `yaml:"address,hostport"`
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DialTimeout time.Duration `yaml:"dial_timeout,zeropositive,default=10s"`
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}
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type TLSConnect struct {
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ConnectCommon `yaml:",inline"`
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Address string `yaml:"address,hostport"`
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Ca string `yaml:"ca"`
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Cert string `yaml:"cert"`
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Key string `yaml:"key"`
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ServerCN string `yaml:"server_cn"`
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DialTimeout time.Duration `yaml:"dial_timeout,zeropositive,default=10s"`
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}
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type SSHStdinserverConnect struct {
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ConnectCommon `yaml:",inline"`
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Host string `yaml:"host"`
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User string `yaml:"user"`
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Port uint16 `yaml:"port"`
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IdentityFile string `yaml:"identity_file"`
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TransportOpenCommand []string `yaml:"transport_open_command,optional"` //TODO unused
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SSHCommand string `yaml:"ssh_command,optional"` //TODO unused
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Options []string `yaml:"options,optional"`
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DialTimeout time.Duration `yaml:"dial_timeout,zeropositive,default=10s"`
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}
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type LocalConnect struct {
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ConnectCommon `yaml:",inline"`
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ListenerName string `yaml:"listener_name"`
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ClientIdentity string `yaml:"client_identity"`
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DialTimeout time.Duration `yaml:"dial_timeout,zeropositive,default=2s"`
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}
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type ServeEnum struct {
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Ret interface{}
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}
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type ServeCommon struct {
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Type string `yaml:"type"`
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}
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type TCPServe struct {
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ServeCommon `yaml:",inline"`
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Listen string `yaml:"listen,hostport"`
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ListenFreeBind bool `yaml:"listen_freebind,default=false"`
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Clients map[string]string `yaml:"clients"`
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}
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type TLSServe struct {
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ServeCommon `yaml:",inline"`
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Listen string `yaml:"listen,hostport"`
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ListenFreeBind bool `yaml:"listen_freebind,default=false"`
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Ca string `yaml:"ca"`
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Cert string `yaml:"cert"`
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Key string `yaml:"key"`
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ClientCNs []string `yaml:"client_cns"`
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HandshakeTimeout time.Duration `yaml:"handshake_timeout,zeropositive,default=10s"`
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}
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type StdinserverServer struct {
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ServeCommon `yaml:",inline"`
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ClientIdentities []string `yaml:"client_identities"`
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}
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type LocalServe struct {
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ServeCommon `yaml:",inline"`
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ListenerName string `yaml:"listener_name"`
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}
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type PruningEnum struct {
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Ret interface{}
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}
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type PruneKeepNotReplicated struct {
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Type string `yaml:"type"`
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KeepSnapshotAtCursor bool `yaml:"keep_snapshot_at_cursor,optional,default=true"`
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}
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type PruneKeepLastN struct {
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Type string `yaml:"type"`
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Count int `yaml:"count"`
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}
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type PruneKeepRegex struct { // FIXME rename to KeepRegex
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Type string `yaml:"type"`
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Regex string `yaml:"regex"`
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Negate bool `yaml:"negate,optional,default=false"`
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}
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type LoggingOutletEnum struct {
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Ret interface{}
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}
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type LoggingOutletCommon struct {
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Type string `yaml:"type"`
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Level string `yaml:"level"`
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Format string `yaml:"format"`
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}
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type StdoutLoggingOutlet struct {
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LoggingOutletCommon `yaml:",inline"`
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Time bool `yaml:"time,default=true"`
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Color bool `yaml:"color,default=true"`
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}
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type SyslogLoggingOutlet struct {
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LoggingOutletCommon `yaml:",inline"`
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Facility *SyslogFacility `yaml:"facility,optional,fromdefaults"`
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RetryInterval time.Duration `yaml:"retry_interval,positive,default=10s"`
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}
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type TCPLoggingOutlet struct {
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LoggingOutletCommon `yaml:",inline"`
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Address string `yaml:"address,hostport"`
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Net string `yaml:"net,default=tcp"`
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RetryInterval time.Duration `yaml:"retry_interval,positive,default=10s"`
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TLS *TCPLoggingOutletTLS `yaml:"tls,optional"`
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}
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type TCPLoggingOutletTLS struct {
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CA string `yaml:"ca"`
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Cert string `yaml:"cert"`
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Key string `yaml:"key"`
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}
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type MonitoringEnum struct {
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Ret interface{}
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}
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type PrometheusMonitoring struct {
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Type string `yaml:"type"`
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Listen string `yaml:"listen,hostport"`
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ListenFreeBind bool `yaml:"listen_freebind,default=false"`
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}
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type SyslogFacility syslog.Priority
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func (f *SyslogFacility) SetDefault() {
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*f = SyslogFacility(syslog.LOG_LOCAL0)
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}
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var _ yaml.Defaulter = (*SyslogFacility)(nil)
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type GlobalControl struct {
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SockPath string `yaml:"sockpath,default=/var/run/zrepl/control"`
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}
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type GlobalServe struct {
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StdinServer *GlobalStdinServer `yaml:"stdinserver,optional,fromdefaults"`
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}
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type GlobalStdinServer struct {
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SockDir string `yaml:"sockdir,default=/var/run/zrepl/stdinserver"`
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}
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type JobDebugSettings struct {
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Conn *struct {
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ReadDump string `yaml:"read_dump"`
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WriteDump string `yaml:"write_dump"`
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} `yaml:"conn,optional"`
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RPCLog bool `yaml:"rpc_log,optional,default=false"`
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}
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type HookList []HookEnum
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type HookEnum struct {
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Ret interface{}
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}
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type HookCommand struct {
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Path string `yaml:"path"`
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Timeout time.Duration `yaml:"timeout,optional,positive,default=30s"`
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Filesystems FilesystemsFilter `yaml:"filesystems,optional,default={'<': true}"`
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HookSettingsCommon `yaml:",inline"`
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}
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type HookPostgresCheckpoint struct {
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HookSettingsCommon `yaml:",inline"`
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DSN string `yaml:"dsn"`
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Timeout time.Duration `yaml:"timeout,optional,positive,default=30s"`
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Filesystems FilesystemsFilter `yaml:"filesystems"` // required, user should not CHECKPOINT for every FS
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}
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type HookMySQLLockTables struct {
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HookSettingsCommon `yaml:",inline"`
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DSN string `yaml:"dsn"`
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Timeout time.Duration `yaml:"timeout,optional,positive,default=30s"`
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Filesystems FilesystemsFilter `yaml:"filesystems"`
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}
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type HookSettingsCommon struct {
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Type string `yaml:"type"`
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ErrIsFatal bool `yaml:"err_is_fatal,optional,default=false"`
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}
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func enumUnmarshal(u func(interface{}, bool) error, types map[string]interface{}) (interface{}, error) {
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var in struct {
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Type string
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}
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if err := u(&in, true); err != nil {
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return nil, err
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}
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if in.Type == "" {
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return nil, &yaml.TypeError{Errors: []string{"must specify type"}}
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}
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v, ok := types[in.Type]
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if !ok {
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return nil, &yaml.TypeError{Errors: []string{fmt.Sprintf("invalid type name %q", in.Type)}}
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}
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if err := u(v, false); err != nil {
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return nil, err
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}
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return v, nil
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}
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func (t *JobEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"snap": &SnapJob{},
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"push": &PushJob{},
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"sink": &SinkJob{},
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"pull": &PullJob{},
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"source": &SourceJob{},
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})
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return
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}
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func (t *ConnectEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"tcp": &TCPConnect{},
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"tls": &TLSConnect{},
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"ssh+stdinserver": &SSHStdinserverConnect{},
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"local": &LocalConnect{},
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})
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return
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}
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func (t *ServeEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"tcp": &TCPServe{},
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"tls": &TLSServe{},
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"stdinserver": &StdinserverServer{},
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"local": &LocalServe{},
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})
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return
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}
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func (t *PruningEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"not_replicated": &PruneKeepNotReplicated{},
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"last_n": &PruneKeepLastN{},
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"grid": &PruneGrid{},
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"regex": &PruneKeepRegex{},
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})
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return
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}
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func (t *SnapshottingEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"periodic": &SnapshottingPeriodic{},
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"manual": &SnapshottingManual{},
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})
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return
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}
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func (t *LoggingOutletEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"stdout": &StdoutLoggingOutlet{},
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"syslog": &SyslogLoggingOutlet{},
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"tcp": &TCPLoggingOutlet{},
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})
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return
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}
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func (t *MonitoringEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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t.Ret, err = enumUnmarshal(u, map[string]interface{}{
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"prometheus": &PrometheusMonitoring{},
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})
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return
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}
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func (t *SyslogFacility) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
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var s string
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if err := u(&s, true); err != nil {
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return err
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}
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var level syslog.Priority
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switch s {
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case "kern":
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level = syslog.LOG_KERN
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case "user":
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level = syslog.LOG_USER
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case "mail":
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level = syslog.LOG_MAIL
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case "daemon":
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level = syslog.LOG_DAEMON
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case "auth":
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level = syslog.LOG_AUTH
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case "syslog":
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level = syslog.LOG_SYSLOG
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case "lpr":
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level = syslog.LOG_LPR
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case "news":
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level = syslog.LOG_NEWS
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case "uucp":
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level = syslog.LOG_UUCP
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case "cron":
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level = syslog.LOG_CRON
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case "authpriv":
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level = syslog.LOG_AUTHPRIV
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case "ftp":
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level = syslog.LOG_FTP
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case "local0":
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level = syslog.LOG_LOCAL0
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case "local1":
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level = syslog.LOG_LOCAL1
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case "local2":
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level = syslog.LOG_LOCAL2
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case "local3":
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level = syslog.LOG_LOCAL3
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case "local4":
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level = syslog.LOG_LOCAL4
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case "local5":
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level = syslog.LOG_LOCAL5
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case "local6":
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level = syslog.LOG_LOCAL6
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case "local7":
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level = syslog.LOG_LOCAL7
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default:
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return fmt.Errorf("invalid syslog level: %q", s)
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}
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*t = SyslogFacility(level)
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return nil
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}
|
|
|
|
func (t *HookEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error) {
|
|
t.Ret, err = enumUnmarshal(u, map[string]interface{}{
|
|
"command": &HookCommand{},
|
|
"postgres-checkpoint": &HookPostgresCheckpoint{},
|
|
"mysql-lock-tables": &HookMySQLLockTables{},
|
|
})
|
|
return
|
|
}
|
|
|
|
var ConfigFileDefaultLocations = []string{
|
|
"/etc/zrepl/zrepl.yml",
|
|
"/usr/local/etc/zrepl/zrepl.yml",
|
|
}
|
|
|
|
func ParseConfig(path string) (i *Config, err error) {
|
|
|
|
if path == "" {
|
|
// Try default locations
|
|
for _, l := range ConfigFileDefaultLocations {
|
|
stat, statErr := os.Stat(l)
|
|
if statErr != nil {
|
|
continue
|
|
}
|
|
if !stat.Mode().IsRegular() {
|
|
err = errors.Errorf("file at default location is not a regular file: %s", l)
|
|
return
|
|
}
|
|
path = l
|
|
break
|
|
}
|
|
}
|
|
|
|
var bytes []byte
|
|
|
|
if bytes, err = ioutil.ReadFile(path); err != nil {
|
|
return
|
|
}
|
|
|
|
return ParseConfigBytes(bytes)
|
|
}
|
|
|
|
func ParseConfigBytes(bytes []byte) (*Config, error) {
|
|
var c *Config
|
|
if err := yaml.UnmarshalStrict(bytes, &c); err != nil {
|
|
return nil, err
|
|
}
|
|
if c == nil {
|
|
return nil, fmt.Errorf("config is empty or only consists of comments")
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
var durationStringRegex *regexp.Regexp = regexp.MustCompile(`^\s*(\d+)\s*(s|m|h|d|w)\s*$`)
|
|
|
|
func parsePositiveDuration(e string) (d time.Duration, err error) {
|
|
comps := durationStringRegex.FindStringSubmatch(e)
|
|
if len(comps) != 3 {
|
|
err = fmt.Errorf("does not match regex: %s %#v", e, comps)
|
|
return
|
|
}
|
|
|
|
durationFactor, err := strconv.ParseInt(comps[1], 10, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if durationFactor <= 0 {
|
|
return 0, errors.New("duration must be positive integer")
|
|
}
|
|
|
|
var durationUnit time.Duration
|
|
switch comps[2] {
|
|
case "s":
|
|
durationUnit = time.Second
|
|
case "m":
|
|
durationUnit = time.Minute
|
|
case "h":
|
|
durationUnit = time.Hour
|
|
case "d":
|
|
durationUnit = 24 * time.Hour
|
|
case "w":
|
|
durationUnit = 24 * 7 * time.Hour
|
|
default:
|
|
err = fmt.Errorf("contains unknown time unit '%s'", comps[2])
|
|
return
|
|
}
|
|
|
|
d = time.Duration(durationFactor) * durationUnit
|
|
return
|
|
}
|