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|
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 {
podName, err := rt.GetName(conConfig.Pod)
if err != nil {
if errors.Cause(err) == define.ErrNoSuchCtr {
return entities.ListContainer{}, errors.Wrapf(define.ErrNoSuchPod, "could not find container %s pod (id %s) in state", conConfig.ID, conConfig.Pod)
}
return entities.ListContainer{}, err
}
ps.PodName = podName
}
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())
}
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