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|
package shared
import (
"context"
"fmt"
"io"
"os"
"path/filepath"
"regexp"
"sort"
"strconv"
"strings"
"sync"
"time"
"github.com/containers/image/v4/types"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/define"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/util"
"github.com/cri-o/ocicni/pkg/ocicni"
"github.com/docker/go-units"
"github.com/google/shlex"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
)
const (
cidTruncLength = 12
podTruncLength = 12
cmdTruncLength = 17
)
// PsOptions describes the struct being formed for ps.
type PsOptions struct {
All bool
Format string
Last int
Latest bool
NoTrunc bool
Pod bool
Quiet bool
Size bool
Sort string
Namespace bool
Sync bool
}
// BatchContainerStruct is the return object from BatchContainer and contains
// container related information.
type BatchContainerStruct struct {
ConConfig *libpod.ContainerConfig
ConState define.ContainerStatus
ExitCode int32
Exited bool
Pid int
StartedTime time.Time
ExitedTime time.Time
Size *ContainerSize
}
// PsContainerOutput is the struct being returned from a parallel
// batch operation.
type PsContainerOutput struct {
ID string
Image string
Command string
Created string
Ports string
Names string
IsInfra bool
Status string
State define.ContainerStatus
Pid int
Size *ContainerSize
Pod string
CreatedAt time.Time
ExitedAt time.Time
StartedAt time.Time
Labels map[string]string
PID string
Cgroup string
IPC string
MNT string
NET string
PIDNS string
User string
UTS string
Mounts string
}
// Namespace describes output for ps namespace.
type Namespace struct {
PID string `json:"pid,omitempty"`
Cgroup string `json:"cgroup,omitempty"`
IPC string `json:"ipc,omitempty"`
MNT string `json:"mnt,omitempty"`
NET string `json:"net,omitempty"`
PIDNS string `json:"pidns,omitempty"`
User string `json:"user,omitempty"`
UTS string `json:"uts,omitempty"`
}
// ContainerSize holds the size of the container's root filesystem and top
// read-write layer.
type ContainerSize struct {
RootFsSize int64 `json:"rootFsSize"`
RwSize int64 `json:"rwSize"`
}
// NewBatchContainer runs a batch process under one lock to get container information and only
// be called in PBatch.
func NewBatchContainer(ctr *libpod.Container, opts PsOptions) (PsContainerOutput, error) {
var (
conState define.ContainerStatus
command string
created string
status string
exitedAt time.Time
startedAt time.Time
exitCode int32
err error
pid int
size *ContainerSize
ns *Namespace
pso PsContainerOutput
)
batchErr := ctr.Batch(func(c *libpod.Container) error {
if opts.Sync {
if err := c.Sync(); err != nil {
return err
}
}
conState, err = c.State()
if err != nil {
return errors.Wrapf(err, "unable to obtain container state")
}
command = strings.Join(c.Command(), " ")
created = units.HumanDuration(time.Since(c.CreatedTime())) + " ago"
exitCode, _, err = c.ExitCode()
if err != nil {
return errors.Wrapf(err, "unable to obtain container exit code")
}
startedAt, err = c.StartedTime()
if err != nil {
logrus.Errorf("error getting started time for %q: %v", c.ID(), err)
}
exitedAt, err = c.FinishedTime()
if err != nil {
logrus.Errorf("error getting exited time for %q: %v", c.ID(), err)
}
if opts.Namespace {
pid, err = c.PID()
if err != nil {
return errors.Wrapf(err, "unable to obtain container pid")
}
ns = GetNamespaces(pid)
}
if opts.Size {
size = new(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 pso, batchErr
}
switch conState.String() {
case define.ContainerStateExited.String():
fallthrough
case define.ContainerStateStopped.String():
exitedSince := units.HumanDuration(time.Since(exitedAt))
status = fmt.Sprintf("Exited (%d) %s ago", exitCode, exitedSince)
case define.ContainerStateRunning.String():
status = "Up " + units.HumanDuration(time.Since(startedAt)) + " ago"
case define.ContainerStatePaused.String():
status = "Paused"
case define.ContainerStateCreated.String(), define.ContainerStateConfigured.String():
status = "Created"
default:
status = "Error"
}
_, imageName := ctr.Image()
cid := ctr.ID()
pod := ctr.PodID()
if !opts.NoTrunc {
cid = cid[0:cidTruncLength]
if len(pod) > podTruncLength {
pod = pod[0:podTruncLength]
}
if len(command) > cmdTruncLength {
command = command[0:cmdTruncLength] + "..."
}
}
ports, err := ctr.PortMappings()
if err != nil {
logrus.Errorf("unable to lookup namespace container for %s", ctr.ID())
}
pso.ID = cid
pso.Image = imageName
pso.Command = command
pso.Created = created
pso.Ports = portsToString(ports)
pso.Names = ctr.Name()
pso.IsInfra = ctr.IsInfra()
pso.Status = status
pso.State = conState
pso.Pid = pid
pso.Size = size
pso.Pod = pod
pso.ExitedAt = exitedAt
pso.CreatedAt = ctr.CreatedTime()
pso.StartedAt = startedAt
pso.Labels = ctr.Labels()
pso.Mounts = strings.Join(ctr.UserVolumes(), " ")
if opts.Namespace {
pso.Cgroup = ns.Cgroup
pso.IPC = ns.IPC
pso.MNT = ns.MNT
pso.NET = ns.NET
pso.User = ns.User
pso.UTS = ns.UTS
pso.PIDNS = ns.PIDNS
}
return pso, nil
}
type batchFunc func() (PsContainerOutput, error)
type workerInput struct {
parallelFunc batchFunc
opts PsOptions
cid string
job int
}
// worker is a "threaded" worker that takes jobs from the channel "queue".
func worker(wg *sync.WaitGroup, jobs <-chan workerInput, results chan<- PsContainerOutput, errors chan<- error) {
for j := range jobs {
r, err := j.parallelFunc()
// If we find an error, we return just the error.
if err != nil {
errors <- err
} else {
// Return the result.
results <- r
}
wg.Done()
}
}
func generateContainerFilterFuncs(filter, filterValue string, r *libpod.Runtime) (func(container *libpod.Container) bool, error) {
switch filter {
case "id":
return func(c *libpod.Container) bool {
return strings.Contains(c.ID(), filterValue)
}, nil
case "label":
var filterArray = strings.SplitN(filterValue, "=", 2)
var filterKey = filterArray[0]
if len(filterArray) > 1 {
filterValue = filterArray[1]
} else {
filterValue = ""
}
return func(c *libpod.Container) bool {
for labelKey, labelValue := range c.Labels() {
if labelKey == filterKey && ("" == filterValue || labelValue == filterValue) {
return true
}
}
return false
}, nil
case "name":
return func(c *libpod.Container) bool {
match, err := regexp.MatchString(filterValue, c.Name())
if err != nil {
return false
}
return match
}, nil
case "exited":
exitCode, err := strconv.ParseInt(filterValue, 10, 32)
if err != nil {
return nil, errors.Wrapf(err, "exited code out of range %q", filterValue)
}
return func(c *libpod.Container) bool {
ec, exited, err := c.ExitCode()
if ec == int32(exitCode) && err == nil && exited {
return true
}
return false
}, nil
case "status":
if !util.StringInSlice(filterValue, []string{"created", "running", "paused", "stopped", "exited", "unknown"}) {
return nil, errors.Errorf("%s is not a valid status", filterValue)
}
return func(c *libpod.Container) bool {
status, err := c.State()
if err != nil {
return false
}
if filterValue == "stopped" {
filterValue = "exited"
}
state := status.String()
if status == define.ContainerStateConfigured {
state = "created"
} else if status == define.ContainerStateStopped {
state = "exited"
}
return state == filterValue
}, nil
case "ancestor":
// This needs to refine to match docker
// - ancestor=(<image-name>[:tag]|<image-id>| ⟨image@digest⟩) - containers created from an image or a descendant.
return func(c *libpod.Container) bool {
containerConfig := c.Config()
if strings.Contains(containerConfig.RootfsImageID, filterValue) || strings.Contains(containerConfig.RootfsImageName, filterValue) {
return true
}
return false
}, nil
case "before":
ctr, err := r.LookupContainer(filterValue)
if err != nil {
return nil, errors.Errorf("unable to find container by name or id of %s", filterValue)
}
containerConfig := ctr.Config()
createTime := containerConfig.CreatedTime
return func(c *libpod.Container) bool {
cc := c.Config()
return createTime.After(cc.CreatedTime)
}, nil
case "since":
ctr, err := r.LookupContainer(filterValue)
if err != nil {
return nil, errors.Errorf("unable to find container by name or id of %s", filterValue)
}
containerConfig := ctr.Config()
createTime := containerConfig.CreatedTime
return func(c *libpod.Container) bool {
cc := c.Config()
return createTime.Before(cc.CreatedTime)
}, nil
case "volume":
//- volume=(<volume-name>|<mount-point-destination>)
return func(c *libpod.Container) bool {
containerConfig := c.Config()
var dest string
arr := strings.Split(filterValue, ":")
source := arr[0]
if len(arr) == 2 {
dest = arr[1]
}
for _, mount := range containerConfig.Spec.Mounts {
if dest != "" && (mount.Source == source && mount.Destination == dest) {
return true
}
if dest == "" && mount.Source == source {
return true
}
}
return false
}, nil
case "health":
return func(c *libpod.Container) bool {
hcStatus, err := c.HealthCheckStatus()
if err != nil {
return false
}
return hcStatus == filterValue
}, nil
}
return nil, errors.Errorf("%s is an invalid filter", filter)
}
// GetPsContainerOutput returns a slice of containers specifically for ps output.
func GetPsContainerOutput(r *libpod.Runtime, opts PsOptions, filters []string, maxWorkers int) ([]PsContainerOutput, error) {
var (
filterFuncs []libpod.ContainerFilter
outputContainers []*libpod.Container
)
if len(filters) > 0 {
for _, f := range filters {
filterSplit := strings.SplitN(f, "=", 2)
if len(filterSplit) < 2 {
return nil, errors.Errorf("filter input must be in the form of filter=value: %s is invalid", f)
}
generatedFunc, err := generateContainerFilterFuncs(filterSplit[0], filterSplit[1], r)
if err != nil {
return nil, errors.Wrapf(err, "invalid filter")
}
filterFuncs = append(filterFuncs, generatedFunc)
}
}
if !opts.Latest {
// Get all containers.
containers, err := r.GetContainers(filterFuncs...)
if err != nil {
return nil, err
}
// We only want the last few containers.
if opts.Last > 0 && opts.Last <= len(containers) {
return nil, errors.Errorf("--last not yet supported")
} else {
outputContainers = containers
}
} else {
// Get just the latest container.
// Ignore filters.
latestCtr, err := r.GetLatestContainer()
if err != nil {
return nil, err
}
outputContainers = []*libpod.Container{latestCtr}
}
pss := PBatch(outputContainers, maxWorkers, opts)
return pss, nil
}
// PBatch performs batch operations on a container in parallel. It spawns the
// number of workers relative to the number of parallel operations desired.
func PBatch(containers []*libpod.Container, workers int, opts PsOptions) []PsContainerOutput {
var (
wg sync.WaitGroup
psResults []PsContainerOutput
)
// If the number of containers in question is less than the number of
// proposed parallel operations, we shouldnt spawn so many workers.
if workers > len(containers) {
workers = len(containers)
}
jobs := make(chan workerInput, len(containers))
results := make(chan PsContainerOutput, len(containers))
batchErrors := make(chan error, len(containers))
// Create the workers.
for w := 1; w <= workers; w++ {
go worker(&wg, jobs, results, batchErrors)
}
// Add jobs to the workers.
for i, j := range containers {
j := j
wg.Add(1)
f := func() (PsContainerOutput, error) {
return NewBatchContainer(j, opts)
}
jobs <- workerInput{
parallelFunc: f,
opts: opts,
cid: j.ID(),
job: i,
}
}
close(jobs)
wg.Wait()
close(results)
close(batchErrors)
for err := range batchErrors {
logrus.Errorf("unable to get container info: %q", err)
}
for res := range results {
// We sort out running vs non-running here to save lots of copying
// later.
if !opts.All && !opts.Latest && opts.Last < 1 {
if !res.IsInfra && res.State == define.ContainerStateRunning {
psResults = append(psResults, res)
}
} else {
psResults = append(psResults, res)
}
}
return psResults
}
// BatchContainerOp is used in ps to reduce performance hits by "batching"
// locks.
func BatchContainerOp(ctr *libpod.Container, opts PsOptions) (BatchContainerStruct, error) {
var (
conConfig *libpod.ContainerConfig
conState define.ContainerStatus
err error
exitCode int32
exited bool
pid int
size *ContainerSize
startedTime time.Time
exitedTime time.Time
)
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")
}
}
if opts.Size {
size = new(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 BatchContainerStruct{}, batchErr
}
return BatchContainerStruct{
ConConfig: conConfig,
ConState: conState,
ExitCode: exitCode,
Exited: exited,
Pid: pid,
StartedTime: startedTime,
ExitedTime: exitedTime,
Size: size,
}, nil
}
// GetNamespaces returns a populated namespace struct.
func GetNamespaces(pid int) *Namespace {
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"))
return &Namespace{
PID: ctrPID,
Cgroup: cgroup,
IPC: ipc,
MNT: mnt,
NET: net,
PIDNS: pidns,
User: user,
UTS: uts,
}
}
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, err := regexp.Compile(`.*\[|\].*`)
if err != nil {
return ""
}
arr := strings.Split(reg.ReplaceAllLiteralString(cmd, ""), ",")
return strings.Join(arr, ",")
}
func comparePorts(i, j ocicni.PortMapping) bool {
if i.ContainerPort != j.ContainerPort {
return i.ContainerPort < j.ContainerPort
}
if i.HostIP != j.HostIP {
return i.HostIP < j.HostIP
}
if i.HostPort != j.HostPort {
return i.HostPort < j.HostPort
}
return i.Protocol < j.Protocol
}
// formatGroup returns the group as <IP:startPort:lastPort->startPort:lastPort/Proto>
// e.g 0.0.0.0:1000-1006->1000-1006/tcp.
func formatGroup(key string, start, last int32) string {
parts := strings.Split(key, "/")
groupType := parts[0]
var ip string
if len(parts) > 1 {
ip = parts[0]
groupType = parts[1]
}
group := strconv.Itoa(int(start))
if start != last {
group = fmt.Sprintf("%s-%d", group, last)
}
if ip != "" {
group = fmt.Sprintf("%s:%s->%s", ip, group, group)
}
return fmt.Sprintf("%s/%s", group, groupType)
}
// portsToString converts the ports used to a string of the from "port1, port2"
// and also groups a continuous list of ports into a readable format.
func portsToString(ports []ocicni.PortMapping) string {
type portGroup struct {
first int32
last int32
}
var portDisplay []string
if len(ports) == 0 {
return ""
}
//Sort the ports, so grouping continuous ports become easy.
sort.Slice(ports, func(i, j int) bool {
return comparePorts(ports[i], ports[j])
})
// portGroupMap is used for grouping continuous ports.
portGroupMap := make(map[string]*portGroup)
var groupKeyList []string
for _, v := range ports {
hostIP := v.HostIP
if hostIP == "" {
hostIP = "0.0.0.0"
}
// If hostPort and containerPort are not same, consider as individual port.
if v.ContainerPort != v.HostPort {
portDisplay = append(portDisplay, fmt.Sprintf("%s:%d->%d/%s", hostIP, v.HostPort, v.ContainerPort, v.Protocol))
continue
}
portMapKey := fmt.Sprintf("%s/%s", hostIP, v.Protocol)
portgroup, ok := portGroupMap[portMapKey]
if !ok {
portGroupMap[portMapKey] = &portGroup{first: v.ContainerPort, last: v.ContainerPort}
// This list is required to travese portGroupMap.
groupKeyList = append(groupKeyList, portMapKey)
continue
}
if portgroup.last == (v.ContainerPort - 1) {
portgroup.last = v.ContainerPort
continue
}
}
// For each portMapKey, format group list and appned to output string.
for _, portKey := range groupKeyList {
group := portGroupMap[portKey]
portDisplay = append(portDisplay, formatGroup(portKey, group.first, group.last))
}
return strings.Join(portDisplay, ", ")
}
// GetRunlabel is a helper function for runlabel; it gets the image if needed and begins the
// construction of the runlabel output and environment variables.
func GetRunlabel(label string, runlabelImage string, ctx context.Context, runtime *libpod.Runtime, pull bool, inputCreds string, dockerRegistryOptions image.DockerRegistryOptions, authfile string, signaturePolicyPath string, output io.Writer) (string, string, error) {
var (
newImage *image.Image
err error
imageName string
)
if pull {
var registryCreds *types.DockerAuthConfig
if inputCreds != "" {
creds, err := util.ParseRegistryCreds(inputCreds)
if err != nil {
return "", "", err
}
registryCreds = creds
}
dockerRegistryOptions.DockerRegistryCreds = registryCreds
newImage, err = runtime.ImageRuntime().New(ctx, runlabelImage, signaturePolicyPath, authfile, output, &dockerRegistryOptions, image.SigningOptions{}, &label, util.PullImageMissing)
} else {
newImage, err = runtime.ImageRuntime().NewFromLocal(runlabelImage)
}
if err != nil {
return "", "", errors.Wrapf(err, "unable to find image")
}
if len(newImage.Names()) < 1 {
imageName = newImage.ID()
} else {
imageName = newImage.Names()[0]
}
runLabel, err := newImage.GetLabel(ctx, label)
return runLabel, imageName, err
}
// GenerateRunlabelCommand generates the command that will eventually be execucted by Podman.
func GenerateRunlabelCommand(runLabel, imageName, name string, opts map[string]string, extraArgs []string, globalOpts string) ([]string, []string, error) {
// If no name is provided, we use the image's basename instead.
if name == "" {
baseName, err := image.GetImageBaseName(imageName)
if err != nil {
return nil, nil, err
}
name = baseName
}
// The user provided extra arguments that need to be tacked onto the label's command.
if len(extraArgs) > 0 {
runLabel = fmt.Sprintf("%s %s", runLabel, strings.Join(extraArgs, " "))
}
cmd, err := GenerateCommand(runLabel, imageName, name, globalOpts)
if err != nil {
return nil, nil, errors.Wrapf(err, "unable to generate command")
}
env := GenerateRunEnvironment(name, imageName, opts)
env = append(env, "PODMAN_RUNLABEL_NESTED=1")
envmap := envSliceToMap(env)
envmapper := func(k string) string {
switch k {
case "OPT1":
return envmap["OPT1"]
case "OPT2":
return envmap["OPT2"]
case "OPT3":
return envmap["OPT3"]
case "PWD":
// I would prefer to use os.getenv but it appears PWD is not in the os env list.
d, err := os.Getwd()
if err != nil {
logrus.Error("unable to determine current working directory")
return ""
}
return d
}
return ""
}
newS := os.Expand(strings.Join(cmd, " "), envmapper)
cmd, err = shlex.Split(newS)
if err != nil {
return nil, nil, err
}
return cmd, env, nil
}
func envSliceToMap(env []string) map[string]string {
m := make(map[string]string)
for _, i := range env {
split := strings.Split(i, "=")
m[split[0]] = strings.Join(split[1:], " ")
}
return m
}
// GenerateKube generates kubernetes yaml based on a pod or container.
func GenerateKube(name string, service bool, r *libpod.Runtime) (*v1.Pod, *v1.Service, error) {
var (
pod *libpod.Pod
podYAML *v1.Pod
err error
container *libpod.Container
servicePorts []v1.ServicePort
serviceYAML v1.Service
)
// Get the container in question.
container, err = r.LookupContainer(name)
if err != nil {
pod, err = r.LookupPod(name)
if err != nil {
return nil, nil, err
}
podYAML, servicePorts, err = pod.GenerateForKube()
} else {
if len(container.Dependencies()) > 0 {
return nil, nil, errors.Wrapf(define.ErrNotImplemented, "containers with dependencies")
}
podYAML, err = container.GenerateForKube()
}
if err != nil {
return nil, nil, err
}
if service {
serviceYAML = libpod.GenerateKubeServiceFromV1Pod(podYAML, servicePorts)
}
return podYAML, &serviceYAML, nil
}
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