package system import ( "context" "encoding/json" "fmt" "io" "net/http" "net/url" "strconv" "time" "github.com/containers/podman/v2/libpod/define" "github.com/containers/podman/v2/pkg/bindings" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // Events allows you to monitor libdpod related events like container creation and // removal. The events are then passed to the eventChan provided. The optional cancelChan // can be used to cancel the read of events and close down the HTTP connection. func Events(ctx context.Context, eventChan chan entities.Event, cancelChan chan bool, since, until *string, filters map[string][]string, stream *bool) error { conn, err := bindings.GetClient(ctx) if err != nil { return err } params := url.Values{} if since != nil { params.Set("since", *since) } if until != nil { params.Set("until", *until) } if stream != nil { params.Set("stream", strconv.FormatBool(*stream)) } if filters != nil { filterString, err := bindings.FiltersToString(filters) if err != nil { return errors.Wrap(err, "invalid filters") } params.Set("filters", filterString) } response, err := conn.DoRequest(nil, http.MethodGet, "/events", params, nil) if err != nil { return err } if cancelChan != nil { go func() { <-cancelChan err = response.Body.Close() logrus.Error(errors.Wrap(err, "unable to close event response body")) }() } dec := json.NewDecoder(response.Body) for err = (error)(nil); err == nil; { var e = entities.Event{} err = dec.Decode(&e) if err == nil { eventChan <- e } } close(eventChan) switch { case err == nil: return nil case errors.Is(err, io.EOF): return nil default: return errors.Wrap(err, "unable to decode event response") } } // Prune removes all unused system data. func Prune(ctx context.Context, all, volumes *bool) (*entities.SystemPruneReport, error) { var ( report entities.SystemPruneReport ) conn, err := bindings.GetClient(ctx) if err != nil { return nil, err } params := url.Values{} if all != nil { params.Set("All", strconv.FormatBool(*all)) } if volumes != nil { params.Set("Volumes", strconv.FormatBool(*volumes)) } response, err := conn.DoRequest(nil, http.MethodPost, "/system/prune", params, nil) if err != nil { return nil, err } return &report, response.Process(&report) } func Version(ctx context.Context) (*entities.SystemVersionReport, error) { var report entities.SystemVersionReport var component entities.ComponentVersion version, err := define.GetVersion() if err != nil { return nil, err } report.Client = &version conn, err := bindings.GetClient(ctx) if err != nil { return nil, err } response, err := conn.DoRequest(nil, http.MethodGet, "/version", nil, nil) if err != nil { return nil, err } if err = response.Process(&component); err != nil { return nil, err } b, _ := time.Parse(time.RFC3339, component.BuildTime) report.Server = &define.Version{ APIVersion: component.APIVersion, Version: component.Version.Version, GoVersion: component.GoVersion, GitCommit: component.GitCommit, BuiltTime: time.Unix(b.Unix(), 0).Format(time.ANSIC), Built: b.Unix(), OsArch: fmt.Sprintf("%s/%s", component.Os, component.Arch), } for _, c := range component.Components { if c.Name == "Podman Engine" { report.Server.APIVersion = c.Details["APIVersion"] } } return &report, err } // DiskUsage returns information about image, container, and volume disk // consumption func DiskUsage(ctx context.Context) (*entities.SystemDfReport, error) { var report entities.SystemDfReport conn, err := bindings.GetClient(ctx) if err != nil { return nil, err } response, err := conn.DoRequest(nil, http.MethodGet, "/system/df", nil, nil) if err != nil { return nil, err } return &report, response.Process(&report) }