package libpod import ( "os" "path/filepath" "sync" is "github.com/containers/image/storage" "github.com/containers/image/types" "github.com/containers/storage" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/ulule/deepcopier" ) // A RuntimeOption is a functional option which alters the Runtime created by // NewRuntime type RuntimeOption func(*Runtime) error // Runtime is the core libpod runtime type Runtime struct { config *RuntimeConfig state State store storage.Store storageService *storageService imageContext *types.SystemContext ociRuntime *OCIRuntime valid bool lock sync.RWMutex } // RuntimeConfig contains configuration options used to set up the runtime type RuntimeConfig struct { StorageConfig storage.StoreOptions ImageDefaultTransport string InsecureRegistries []string Registries []string SignaturePolicyPath string InMemoryState bool RuntimePath string ConmonPath string ConmonEnvVars []string CgroupManager string StaticDir string TmpDir string SelinuxEnabled bool PidsLimit int64 MaxLogSize int64 NoPivotRoot bool } var ( defaultRuntimeConfig = RuntimeConfig{ // Leave this empty so containers/storage will use its defaults StorageConfig: storage.StoreOptions{}, ImageDefaultTransport: DefaultTransport, InMemoryState: false, RuntimePath: "/usr/bin/runc", ConmonPath: "/usr/local/libexec/crio/conmon", ConmonEnvVars: []string{ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", }, CgroupManager: "cgroupfs", StaticDir: "/var/lib/libpod", TmpDir: "/var/run/libpod", SelinuxEnabled: false, PidsLimit: 1024, MaxLogSize: -1, NoPivotRoot: false, } ) // NewRuntime creates a new container runtime // Options can be passed to override the default configuration for the runtime func NewRuntime(options ...RuntimeOption) (runtime *Runtime, err error) { runtime = new(Runtime) runtime.config = new(RuntimeConfig) // Copy the default configuration deepcopier.Copy(defaultRuntimeConfig).To(runtime.config) // Overwrite it with user-given configuration options for _, opt := range options { if err := opt(runtime); err != nil { return nil, errors.Wrapf(err, "error configuring runtime") } } // Set up containers/storage store, err := storage.GetStore(runtime.config.StorageConfig) if err != nil { return nil, err } runtime.store = store is.Transport.SetStore(store) defer func() { if err != nil { // Don't forcibly shut down // We could be opening a store in use by another libpod _, err2 := store.Shutdown(false) if err2 != nil { logrus.Errorf("Error removing store for partially-created runtime: %s", err2) } } }() // Set up a storage service for creating container root filesystems from // images storageService, err := getStorageService(runtime.store) if err != nil { return nil, err } runtime.storageService = storageService // Set up containers/image runtime.imageContext = &types.SystemContext{ SignaturePolicyPath: runtime.config.SignaturePolicyPath, } // Make an OCI runtime to perform container operations ociRuntime, err := newOCIRuntime("runc", runtime.config.RuntimePath, runtime.config.ConmonPath, runtime.config.ConmonEnvVars, runtime.config.CgroupManager, runtime.config.TmpDir, runtime.config.MaxLogSize, runtime.config.NoPivotRoot) if err != nil { return nil, err } runtime.ociRuntime = ociRuntime // Make the static files directory if it does not exist if err := os.MkdirAll(runtime.config.StaticDir, 0755); err != nil { // The directory is allowed to exist if !os.IsExist(err) { return nil, errors.Wrapf(err, "error creating runtime static files directory %s", runtime.config.StaticDir) } } // Make the per-boot files directory if it does not exist if err := os.MkdirAll(runtime.config.TmpDir, 0755); err != nil { // The directory is allowed to exist if !os.IsExist(err) { return nil, errors.Wrapf(err, "error creating runtime temporary files directory %s", runtime.config.TmpDir) } } // Set up the state if runtime.config.InMemoryState { state, err := NewInMemoryState() if err != nil { return nil, err } runtime.state = state } else { dbPath := filepath.Join(runtime.config.StaticDir, "state.sql") lockPath := filepath.Join(runtime.config.TmpDir, "state.lck") specsDir := filepath.Join(runtime.config.StaticDir, "ocispec") // Make a directory to hold JSON versions of container OCI specs if err := os.MkdirAll(specsDir, 0755); err != nil { // The directory is allowed to exist if !os.IsExist(err) { return nil, errors.Wrapf(err, "error creating runtime OCI specs directory %s", specsDir) } } state, err := NewSQLState(dbPath, lockPath, specsDir, runtime) if err != nil { return nil, err } runtime.state = state } // Mark the runtime as valid - ready to be used, cannot be modified // further runtime.valid = true return runtime, nil } // GetConfig returns a copy of the configuration used by the runtime func (r *Runtime) GetConfig() *RuntimeConfig { r.lock.RLock() defer r.lock.RUnlock() if !r.valid { return nil } config := new(RuntimeConfig) // Copy so the caller won't be able to modify the actual config deepcopier.Copy(r.config).To(config) return config } // Shutdown shuts down the runtime and associated containers and storage // If force is true, containers and mounted storage will be shut down before // cleaning up; if force is false, an error will be returned if there are // still containers running or mounted func (r *Runtime) Shutdown(force bool) error { r.lock.Lock() defer r.lock.Unlock() if !r.valid { return ErrRuntimeStopped } r.valid = false _, err := r.store.Shutdown(force) if err != nil { return err } // TODO: Should always call this even if store.Shutdown failed return r.state.Close() }