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Signed-off-by: Mikhail Scherba <mikhail.scherba@flant.com>
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225 changes: 225 additions & 0 deletions
225
pkg/module_manager/environment_manager/evironment_manager.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,225 @@ | ||
| package environment_manager | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "log/slog" | ||
| "os" | ||
| "path/filepath" | ||
| "sync" | ||
| "syscall" | ||
|
|
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| "github.com/deckhouse/deckhouse/pkg/log" | ||
|
|
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| "github.com/flant/addon-operator/pkg/utils" | ||
| ) | ||
|
|
||
| type ( | ||
| Type string | ||
| Environment int | ||
| ) | ||
|
|
||
| const ( | ||
| Mount Type = "mount" | ||
| File Type = "file" | ||
| DevNull Type = "devNull" | ||
| ) | ||
|
|
||
| const ( | ||
| NoEnvironment Environment = iota | ||
| EnabledScriptEnvironment | ||
| ShellHookEnvironment | ||
| ) | ||
|
|
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| const testsEnv = "ADDON_OPERATOR_IS_TESTS_ENVIRONMENT" | ||
|
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| type ObjectDescriptor struct { | ||
| Source string | ||
| Target string | ||
| Flags uintptr | ||
| Type Type | ||
| TargetEnvironment Environment | ||
| } | ||
|
|
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| type Manager struct { | ||
| objects map[string]ObjectDescriptor | ||
| chroot string | ||
|
|
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| l sync.Mutex | ||
| preparedEnvironments map[string]Environment | ||
|
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| logger *log.Logger | ||
| } | ||
|
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| func NewManager(chroot string, logger *log.Logger) *Manager { | ||
| return &Manager{ | ||
| preparedEnvironments: make(map[string]Environment), | ||
| chroot: chroot, | ||
| objects: make(map[string]ObjectDescriptor), | ||
| logger: logger, | ||
| } | ||
| } | ||
|
|
||
| func (m *Manager) AddObjectsToEnvironment(objects ...ObjectDescriptor) { | ||
| m.l.Lock() | ||
| for _, object := range objects { | ||
| m.objects[object.Source] = object | ||
| } | ||
| m.l.Unlock() | ||
| } | ||
|
|
||
| func makedev(majorNumber int64, minorNumber int64) int { | ||
| return int((majorNumber << 8) | (minorNumber & 0xff) | ((minorNumber & 0xfff00) << 12)) | ||
| } | ||
|
|
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| func (m *Manager) DisassembleEnvironmentForModule(moduleName, modulePath string, targetEnvironment Environment) error { | ||
| logEntry := utils.EnrichLoggerWithLabels(m.logger, map[string]string{ | ||
| "operator.component": "EnvironmentManager.DisassembleEnvironmentForModule", | ||
| }) | ||
| m.l.Lock() | ||
| defer m.l.Unlock() | ||
|
|
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| currentEnvironment := m.preparedEnvironments[moduleName] | ||
| if currentEnvironment == NoEnvironment || currentEnvironment == targetEnvironment { | ||
| return nil | ||
| } | ||
|
|
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| logEntry.Debug("Disassembling environment", | ||
| slog.String("module", moduleName), | ||
| slog.Any("currentEnvironment", currentEnvironment), | ||
| slog.Any("targetEnvironment", targetEnvironment)) | ||
|
|
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| chrootedModuleEnvPath := filepath.Join(m.chroot, moduleName) | ||
| for _, properties := range m.objects { | ||
| if properties.TargetEnvironment > targetEnvironment && properties.TargetEnvironment <= currentEnvironment { | ||
| var chrootedObjectPath string | ||
| if len(properties.Target) > 0 { | ||
| chrootedObjectPath = filepath.Join(chrootedModuleEnvPath, properties.Target) | ||
| } else { | ||
| chrootedObjectPath = filepath.Join(chrootedModuleEnvPath, properties.Source) | ||
| } | ||
|
|
||
| switch properties.Type { | ||
| case File, DevNull: | ||
| if err := os.Remove(chrootedObjectPath); err != nil { | ||
| return fmt.Errorf("delete file %q: %w", chrootedObjectPath, err) | ||
| } | ||
|
|
||
| case Mount: | ||
| if err := syscall.Unmount(chrootedObjectPath, 0); err != nil { | ||
| return fmt.Errorf("unmount folder %q: %w", chrootedObjectPath, err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| if targetEnvironment == NoEnvironment { | ||
| if os.Getenv(testsEnv) != "true" { | ||
| chrootedModuleDir := filepath.Join(chrootedModuleEnvPath, modulePath) | ||
| if err := syscall.Unmount(chrootedModuleDir, 0); err != nil { | ||
| return fmt.Errorf("unmount %q module's dir: %w", modulePath, err) | ||
| } | ||
| } | ||
|
|
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| delete(m.preparedEnvironments, moduleName) | ||
| } else { | ||
| m.preparedEnvironments[moduleName] = targetEnvironment | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func (m *Manager) AssembleEnvironmentForModule(moduleName, modulePath string, targetEnvironment Environment) error { | ||
| logEntry := utils.EnrichLoggerWithLabels(m.logger, map[string]string{ | ||
| "operator.component": "EnvironmentManager.AssembleEnvironmentForModule", | ||
| }) | ||
|
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| m.l.Lock() | ||
| defer m.l.Unlock() | ||
|
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| currentEnvironment := m.preparedEnvironments[moduleName] | ||
| if currentEnvironment >= targetEnvironment { | ||
| return nil | ||
| } | ||
|
|
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| logEntry.Debug("Preparing environment", | ||
| slog.String("module", moduleName), | ||
| slog.Any("currentEnvironment", currentEnvironment), | ||
| slog.Any("targetEnvironment", targetEnvironment)) | ||
|
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| chrootedModuleEnvPath := filepath.Join(m.chroot, moduleName) | ||
|
|
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| if currentEnvironment == NoEnvironment { | ||
| logEntry.Debug("Preparing environment - creating the module's directory", | ||
| slog.String("module", moduleName), | ||
| slog.Any("currentEnvironment", currentEnvironment), | ||
| slog.Any("targetEnvironment", targetEnvironment)) | ||
|
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| chrootedModuleDir := filepath.Join(chrootedModuleEnvPath, modulePath) | ||
| if err := os.MkdirAll(chrootedModuleDir, 0o755); err != nil { | ||
| return fmt.Errorf("make %q module's dir: %w", modulePath, err) | ||
| } | ||
|
|
||
| if os.Getenv(testsEnv) != "true" { | ||
| if err := syscall.Mount(modulePath, chrootedModuleDir, "", syscall.MS_BIND|syscall.MS_RDONLY, ""); err != nil { | ||
| return fmt.Errorf("mount %q module's dir: %w", modulePath, err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| for _, properties := range m.objects { | ||
| if properties.TargetEnvironment != currentEnvironment && properties.TargetEnvironment <= targetEnvironment { | ||
| var chrootedObjectPath string | ||
| if len(properties.Target) > 0 { | ||
| chrootedObjectPath = filepath.Join(chrootedModuleEnvPath, properties.Target) | ||
| } else { | ||
| chrootedObjectPath = filepath.Join(chrootedModuleEnvPath, properties.Source) | ||
| } | ||
|
|
||
| switch properties.Type { | ||
| case File: | ||
| if err := os.MkdirAll(filepath.Dir(chrootedObjectPath), 0o755); err != nil { | ||
| return fmt.Errorf("make dir %q: %w", chrootedObjectPath, err) | ||
| } | ||
|
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||
| bytesRead, err := os.ReadFile(properties.Source) | ||
| if err != nil { | ||
| return fmt.Errorf("read from file %q: %w", properties.Source, err) | ||
| } | ||
|
|
||
| if err = os.WriteFile(chrootedObjectPath, bytesRead, 0o644); err != nil { | ||
| return fmt.Errorf("write to file %q: %w", chrootedObjectPath, err) | ||
| } | ||
|
|
||
| case DevNull: | ||
| if err := os.MkdirAll(filepath.Dir(chrootedObjectPath), 0o755); err != nil { | ||
| return fmt.Errorf("make dir %q: %w", chrootedObjectPath, err) | ||
| } | ||
|
|
||
| if err := syscall.Mknod(chrootedObjectPath, syscall.S_IFCHR|0o666, makedev(1, 3)); err != nil { | ||
| if errors.Is(err, os.ErrExist) { | ||
| continue | ||
| } | ||
| return fmt.Errorf("create null file: %w", err) | ||
| } | ||
|
|
||
| if err := os.Chmod(chrootedObjectPath, 0o666); err != nil { | ||
| return fmt.Errorf("chmod %q file: %w", chrootedObjectPath, err) | ||
| } | ||
|
|
||
| case Mount: | ||
| if err := os.MkdirAll(chrootedObjectPath, 0o755); err != nil { | ||
| return fmt.Errorf("make dir %q: %w", chrootedObjectPath, err) | ||
| } | ||
|
|
||
| if err := syscall.Mount(properties.Source, chrootedObjectPath, "", properties.Flags, ""); err != nil { | ||
| return fmt.Errorf("mount folder %q: %w", chrootedObjectPath, err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| m.preparedEnvironments[moduleName] = targetEnvironment | ||
|
|
||
| return nil | ||
| } |
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