mirror of https://github.com/docker/docs.git
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
package host
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import (
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"encoding/json"
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"fmt"
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"path/filepath"
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"github.com/docker/machine/drivers/driverfactory"
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"github.com/docker/machine/libmachine/version"
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)
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func getMigratedHostMetadata(data []byte) (*HostMetadata, error) {
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// HostMetadata is for a "first pass" so we can then load the driver
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var (
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hostMetadata *HostMetadataV0
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)
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if err := json.Unmarshal(data, &hostMetadata); err != nil {
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return &HostMetadata{}, err
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}
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migratedHostMetadata := MigrateHostMetadataV0ToHostMetadataV1(hostMetadata)
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return migratedHostMetadata, nil
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}
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func MigrateHost(h *Host, data []byte) (*Host, bool, error) {
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var (
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migrationPerformed = false
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hostV1 *HostV1
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)
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migratedHostMetadata, err := getMigratedHostMetadata(data)
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if err != nil {
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return &Host{}, false, err
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}
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globalStorePath := filepath.Dir(filepath.Dir(migratedHostMetadata.HostOptions.AuthOptions.StorePath))
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driver, err := driverfactory.NewDriver(migratedHostMetadata.DriverName, h.Name, globalStorePath)
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if err != nil {
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return &Host{}, false, err
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}
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if migratedHostMetadata.ConfigVersion == version.ConfigVersion {
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h.Driver = driver
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if err := json.Unmarshal(data, &h); err != nil {
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return &Host{}, migrationPerformed, fmt.Errorf("Error unmarshalling most recent host version: %s", err)
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}
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} else {
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migrationPerformed = true
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for h.ConfigVersion = migratedHostMetadata.ConfigVersion; h.ConfigVersion < version.ConfigVersion; h.ConfigVersion++ {
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switch h.ConfigVersion {
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case 0:
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hostV0 := &HostV0{
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Driver: driver,
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}
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if err := json.Unmarshal(data, &hostV0); err != nil {
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return &Host{}, migrationPerformed, fmt.Errorf("Error unmarshalling host config version 0: %s", err)
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}
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hostV1 = MigrateHostV0ToHostV1(hostV0)
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case 1:
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if hostV1 == nil {
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hostV1 = &HostV1{
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Driver: driver,
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}
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if err := json.Unmarshal(data, &hostV1); err != nil {
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return &Host{}, migrationPerformed, fmt.Errorf("Error unmarshalling host config version 1: %s", err)
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}
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}
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h = MigrateHostV1ToHostV2(hostV1)
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}
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}
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}
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return h, migrationPerformed, nil
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}
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