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Signed-off-by: Emruz Hossain <[email protected]>
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Emruz Hossain
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Mar 21, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package manager | ||
|
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| type applicationBackupManager struct { | ||
| BackupOptions | ||
| } | ||
|
|
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| func newApplicationBackupManager(opt BackupOptions) BackupManager { | ||
| return applicationBackupManager{ | ||
| BackupOptions: opt, | ||
| } | ||
| } | ||
|
|
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| func (opt applicationBackupManager) Dump() error { | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| package manager | ||
|
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| import ( | ||
| "context" | ||
| "path/filepath" | ||
| "strings" | ||
|
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| "stash.appscode.dev/elasticsearch/pkg/manager/sanitizers" | ||
|
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| core "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/apimachinery/pkg/runtime/serializer" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| "k8s.io/client-go/discovery" | ||
| "k8s.io/client-go/kubernetes/scheme" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/klog/v2" | ||
| "kmodules.xyz/client-go/tools/backup" | ||
| "sigs.k8s.io/yaml" | ||
| ) | ||
|
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| type clusterBackupManager struct { | ||
| BackupOptions | ||
| } | ||
|
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| func newClusterBackupManager(opt BackupOptions) BackupManager { | ||
| return clusterBackupManager{ | ||
| BackupOptions: opt, | ||
| } | ||
| } | ||
|
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| func (opt clusterBackupManager) Dump() error { | ||
| // backup cluster resources yaml into opt.backupDir | ||
| mgr := backup.NewBackupManager(opt.Ctx, opt.Config, opt.Sanitize) | ||
|
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| _, err := mgr.BackupToDir(opt.DataDir) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| type ItemList struct { | ||
| Items []map[string]interface{} `json:"items,omitempty"` | ||
| } | ||
|
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| type processorFunc func(relPath string, data []byte) error | ||
|
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| func (opt clusterBackupManager) Backup(process processorFunc) error { | ||
| // ref: https://github.com/kubernetes/ingress-nginx/blob/0dab51d9eb1e5a9ba3661f351114825ac8bfc1af/pkg/ingress/controller/launch.go#L252 | ||
| opt.Config.QPS = 1e6 | ||
| opt.Config.Burst = 1e6 | ||
| if err := rest.SetKubernetesDefaults(opt.Config); err != nil { | ||
| return err | ||
| } | ||
| opt.Config.NegotiatedSerializer = serializer.WithoutConversionCodecFactory{CodecFactory: scheme.Codecs} | ||
| if opt.Config.UserAgent == "" { | ||
| opt.Config.UserAgent = rest.DefaultKubernetesUserAgent() | ||
| } | ||
|
|
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| disClient, err := discovery.NewDiscoveryClientForConfig(opt.Config) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| resourceLists, err := disClient.ServerPreferredResources() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| resourceListBytes, err := yaml.Marshal(resourceLists) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = process("resource_lists.yaml", resourceListBytes) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| for _, list := range resourceLists { | ||
| gv, err := schema.ParseGroupVersion(list.GroupVersion) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, r := range list.APIResources { | ||
| if strings.ContainsRune(r.Name, '/') { | ||
| continue // skip subresource | ||
| } | ||
| if !sets.NewString(r.Verbs...).HasAll("list", "get") { | ||
| continue | ||
| } | ||
|
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| klog.V(3).Infof("Taking backup of %s apiVersion:%s kind:%s", list.GroupVersion, r.Name, r.Kind) | ||
| opt.Config.GroupVersion = &gv | ||
| opt.Config.APIPath = "/apis" | ||
| if gv.Group == core.GroupName { | ||
| opt.Config.APIPath = "/api" | ||
| } | ||
| client, err := rest.RESTClientFor(opt.Config) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| request := client.Get().Resource(r.Name).Param("pretty", "true") | ||
| resp, err := request.DoRaw(context.TODO()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| items := &ItemList{} | ||
| err = yaml.Unmarshal(resp, &items) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, item := range items.Items { | ||
| var path string | ||
| item["apiVersion"] = list.GroupVersion | ||
| item["kind"] = r.Kind | ||
|
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| md, ok := item["metadata"] | ||
| if ok { | ||
| path = getPathFromSelfLink(md) | ||
| } | ||
|
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| if opt.Sanitize { | ||
| s := sanitizers.NewSanitizer(r) | ||
| item, err := s.Sanitize(item) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| delete(item, "status") | ||
| } | ||
| data, err := yaml.Marshal(item) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| absPath := filepath.Join(opt.DataDir, path) | ||
| err = opt.Storage.Write(absPath, data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = process(path, data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| func getPathFromSelfLink(md interface{}) string { | ||
| meta, ok := md.(map[string]interface{}) | ||
| if ok { | ||
| return meta["selfLink"].(string) + ".yaml" | ||
| } | ||
| return "" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package manager | ||
|
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| type namespaceBackupManager struct { | ||
| BackupOptions | ||
| } | ||
|
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| func newNamespaceBackupManager(opt BackupOptions) BackupManager { | ||
| return namespaceBackupManager{ | ||
| BackupOptions: opt, | ||
| } | ||
| } | ||
|
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| func (opt namespaceBackupManager) Dump() error { | ||
| return nil | ||
| } |
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