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package libpod
import (
"context"
"time"
"github.com/containers/podman/v3/libpod/define"
"github.com/containers/podman/v3/pkg/util"
"github.com/pkg/errors"
)
// Contains the public Runtime API for pods
// A PodCreateOption is a functional option which alters the Pod created by
// NewPod
type PodCreateOption func(*Pod) error
// PodFilter is a function to determine whether a pod is included in command
// output. Pods to be outputted are tested using the function. A true return
// will include the pod, a false return will exclude it.
type PodFilter func(*Pod) bool
// RemovePod removes a pod
// If removeCtrs is specified, containers will be removed
// Otherwise, a pod that is not empty will return an error and not be removed
// If force is specified with removeCtrs, all containers will be stopped before
// being removed
// Otherwise, the pod will not be removed if any containers are running
func (r *Runtime) RemovePod(ctx context.Context, p *Pod, removeCtrs, force bool) error {
r.lock.Lock()
defer r.lock.Unlock()
if !r.valid {
return define.ErrRuntimeStopped
}
if !p.valid {
if ok, _ := r.state.HasPod(p.ID()); !ok {
// Pod probably already removed
// Or was never in the runtime to begin with
return nil
}
}
p.lock.Lock()
defer p.lock.Unlock()
return r.removePod(ctx, p, removeCtrs, force)
}
// GetPod retrieves a pod by its ID
func (r *Runtime) GetPod(id string) (*Pod, error) {
r.lock.RLock()
defer r.lock.RUnlock()
if !r.valid {
return nil, define.ErrRuntimeStopped
}
return r.state.Pod(id)
}
// HasPod checks to see if a pod with the given ID exists
func (r *Runtime) HasPod(id string) (bool, error) {
r.lock.RLock()
defer r.lock.RUnlock()
if !r.valid {
return false, define.ErrRuntimeStopped
}
return r.state.HasPod(id)
}
// LookupPod retrieves a pod by its name or a partial ID
// If a partial ID is not unique, an error will be returned
func (r *Runtime) LookupPod(idOrName string) (*Pod, error) {
r.lock.RLock()
defer r.lock.RUnlock()
if !r.valid {
return nil, define.ErrRuntimeStopped
}
return r.state.LookupPod(idOrName)
}
// Pods retrieves all pods
// Filters can be provided which will determine which pods are included in the
// output. Multiple filters are handled by ANDing their output, so only pods
// matching all filters are returned
func (r *Runtime) Pods(filters ...PodFilter) ([]*Pod, error) {
pods, err := r.GetAllPods()
if err != nil {
return nil, err
}
podsFiltered := make([]*Pod, 0, len(pods))
for _, pod := range pods {
include := true
for _, filter := range filters {
include = include && filter(pod)
}
if include {
podsFiltered = append(podsFiltered, pod)
}
}
return podsFiltered, nil
}
// GetAllPods retrieves all pods
func (r *Runtime) GetAllPods() ([]*Pod, error) {
r.lock.RLock()
defer r.lock.RUnlock()
if !r.valid {
return nil, define.ErrRuntimeStopped
}
return r.state.AllPods()
}
// GetLatestPod returns a pod object of the latest created pod.
func (r *Runtime) GetLatestPod() (*Pod, error) {
lastCreatedIndex := -1
var lastCreatedTime time.Time
pods, err := r.GetAllPods()
if err != nil {
return nil, errors.Wrapf(err, "unable to get all pods")
}
if len(pods) == 0 {
return nil, define.ErrNoSuchPod
}
for podIndex, pod := range pods {
createdTime := pod.config.CreatedTime
if createdTime.After(lastCreatedTime) {
lastCreatedTime = createdTime
lastCreatedIndex = podIndex
}
}
return pods[lastCreatedIndex], nil
}
// GetRunningPods returns an array of running pods
func (r *Runtime) GetRunningPods() ([]*Pod, error) {
var (
pods []string
runningPods []*Pod
)
r.lock.RLock()
defer r.lock.RUnlock()
if !r.valid {
return nil, define.ErrRuntimeStopped
}
containers, err := r.GetRunningContainers()
if err != nil {
return nil, err
}
// Assemble running pods
for _, c := range containers {
if !util.StringInSlice(c.PodID(), pods) {
pods = append(pods, c.PodID())
pod, err := r.GetPod(c.PodID())
if err != nil {
if errors.Cause(err) == define.ErrPodRemoved || errors.Cause(err) == define.ErrNoSuchPod {
continue
}
return nil, err
}
runningPods = append(runningPods, pod)
}
}
return runningPods, nil
}
// PrunePods removes unused pods and their containers from local storage.
func (r *Runtime) PrunePods(ctx context.Context) (map[string]error, error) {
response := make(map[string]error)
states := []string{define.PodStateStopped, define.PodStateExited}
filterFunc := func(p *Pod) bool {
state, _ := p.GetPodStatus()
for _, status := range states {
if state == status {
return true
}
}
return false
}
pods, err := r.Pods(filterFunc)
if err != nil {
return nil, err
}
if len(pods) < 1 {
return response, nil
}
for _, pod := range pods {
err := r.removePod(context.TODO(), pod, true, false)
response[pod.ID()] = err
}
return response, nil
}
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