package ps import ( "os" "path/filepath" "regexp" "sort" "strconv" "strings" "time" "github.com/containers/podman/v2/libpod" "github.com/containers/podman/v2/libpod/define" lpfilters "github.com/containers/podman/v2/libpod/filters" "github.com/containers/podman/v2/pkg/domain/entities" psdefine "github.com/containers/podman/v2/pkg/ps/define" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) func GetContainerLists(runtime *libpod.Runtime, options entities.ContainerListOptions) ([]entities.ListContainer, error) { var ( filterFuncs []libpod.ContainerFilter pss = []entities.ListContainer{} ) all := options.All || options.Last > 0 if len(options.Filters) > 0 { for k, v := range options.Filters { for _, val := range v { generatedFunc, err := lpfilters.GenerateContainerFilterFuncs(k, val, runtime) if err != nil { return nil, err } filterFuncs = append(filterFuncs, generatedFunc) } } } // Docker thinks that if status is given as an input, then we should override // the all setting and always deal with all containers. if len(options.Filters["status"]) > 0 { all = true } if !all { runningOnly, err := lpfilters.GenerateContainerFilterFuncs("status", define.ContainerStateRunning.String(), runtime) if err != nil { return nil, err } filterFuncs = append(filterFuncs, runningOnly) } cons, err := runtime.GetContainers(filterFuncs...) if err != nil { return nil, err } if options.Last > 0 { // Sort the containers we got sort.Sort(SortCreateTime{SortContainers: cons}) // we should perform the lopping before we start getting // the expensive information on containers if options.Last < len(cons) { cons = cons[len(cons)-options.Last:] } } for _, con := range cons { listCon, err := ListContainerBatch(runtime, con, options) if err != nil { return nil, err } pss = append(pss, listCon) } return pss, nil } // BatchContainerOp is used in ps to reduce performance hits by "batching" // locks. func ListContainerBatch(rt *libpod.Runtime, ctr *libpod.Container, opts entities.ContainerListOptions) (entities.ListContainer, error) { var ( conConfig *libpod.ContainerConfig conState define.ContainerStatus err error exitCode int32 exited bool pid int size *psdefine.ContainerSize startedTime time.Time exitedTime time.Time cgroup, ipc, mnt, net, pidns, user, uts string ) batchErr := ctr.Batch(func(c *libpod.Container) error { conConfig = c.Config() conState, err = c.State() if err != nil { return errors.Wrapf(err, "unable to obtain container state") } exitCode, exited, err = c.ExitCode() if err != nil { return errors.Wrapf(err, "unable to obtain container exit code") } startedTime, err = c.StartedTime() if err != nil { logrus.Errorf("error getting started time for %q: %v", c.ID(), err) } exitedTime, err = c.FinishedTime() if err != nil { logrus.Errorf("error getting exited time for %q: %v", c.ID(), err) } if !opts.Size && !opts.Namespace { return nil } if opts.Namespace { pid, err = c.PID() if err != nil { return errors.Wrapf(err, "unable to obtain container pid") } ctrPID := strconv.Itoa(pid) cgroup, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "cgroup")) ipc, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "ipc")) mnt, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "mnt")) net, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "net")) pidns, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "pid")) user, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "user")) uts, _ = getNamespaceInfo(filepath.Join("/proc", ctrPID, "ns", "uts")) } if opts.Size { size = new(psdefine.ContainerSize) rootFsSize, err := c.RootFsSize() if err != nil { logrus.Errorf("error getting root fs size for %q: %v", c.ID(), err) } rwSize, err := c.RWSize() if err != nil { logrus.Errorf("error getting rw size for %q: %v", c.ID(), err) } size.RootFsSize = rootFsSize size.RwSize = rwSize } return nil }) if batchErr != nil { return entities.ListContainer{}, batchErr } portMappings, err := ctr.PortMappings() if err != nil { return entities.ListContainer{}, err } ps := entities.ListContainer{ Command: conConfig.Command, Created: conConfig.CreatedTime.Unix(), Exited: exited, ExitCode: exitCode, ExitedAt: exitedTime.Unix(), ID: conConfig.ID, Image: conConfig.RootfsImageName, ImageID: conConfig.RootfsImageID, IsInfra: conConfig.IsInfra, Labels: conConfig.Labels, Mounts: ctr.UserVolumes(), Names: []string{conConfig.Name}, Pid: pid, Pod: conConfig.Pod, Ports: portMappings, Size: size, StartedAt: startedTime.Unix(), State: conState.String(), } if opts.Pod && len(conConfig.Pod) > 0 { pod, err := rt.GetPod(conConfig.Pod) if err != nil { return entities.ListContainer{}, err } ps.PodName = pod.Name() } if opts.Namespace { ps.Namespaces = entities.ListContainerNamespaces{ Cgroup: cgroup, IPC: ipc, MNT: mnt, NET: net, PIDNS: pidns, User: user, UTS: uts, } } return ps, nil } func getNamespaceInfo(path string) (string, error) { val, err := os.Readlink(path) if err != nil { return "", errors.Wrapf(err, "error getting info from %q", path) } return getStrFromSquareBrackets(val), nil } // getStrFromSquareBrackets gets the string inside [] from a string. func getStrFromSquareBrackets(cmd string) string { reg := regexp.MustCompile(`.*\[|\].*`) arr := strings.Split(reg.ReplaceAllLiteralString(cmd, ""), ",") return strings.Join(arr, ",") } // SortContainers helps us set-up ability to sort by createTime type SortContainers []*libpod.Container func (a SortContainers) Len() int { return len(a) } func (a SortContainers) Swap(i, j int) { a[i], a[j] = a[j], a[i] } type SortCreateTime struct{ SortContainers } func (a SortCreateTime) Less(i, j int) bool { return a.SortContainers[i].CreatedTime().Before(a.SortContainers[j].CreatedTime()) }