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//go:build !remote
package libpod
import (
"context"
"errors"
"fmt"
"github.com/containers/common/pkg/cgroups"
"github.com/containers/podman/v5/libpod/define"
"github.com/containers/podman/v5/libpod/events"
"github.com/containers/podman/v5/pkg/parallel"
"github.com/containers/podman/v5/pkg/rootless"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// startInitContainers starts a pod's init containers.
func (p *Pod) startInitContainers(ctx context.Context) error {
initCtrs, err := p.initContainers()
if err != nil {
return err
}
// Now iterate init containers
for _, initCon := range initCtrs {
if err := initCon.Start(ctx, true); err != nil {
return err
}
// Check that the init container waited correctly and the exit
// code is good
rc, err := initCon.Wait(ctx)
if err != nil {
return err
}
if rc != 0 {
return fmt.Errorf("init container %s exited with code %d", initCon.ID(), rc)
}
// If the container is a once init container, we need to remove it
// after it runs
if initCon.config.InitContainerType == define.OneShotInitContainer {
icLock := initCon.lock
icLock.Lock()
var time *uint
opts := ctrRmOpts{
RemovePod: true,
Timeout: time,
}
if _, _, err := p.runtime.removeContainer(ctx, initCon, opts); err != nil {
icLock.Unlock()
return fmt.Errorf("failed to remove once init container %s: %w", initCon.ID(), err)
}
icLock.Unlock()
}
}
return nil
}
// Start starts all containers within a pod.
// It combines the effects of Init() and Start() on a container.
// If a container has already been initialized it will be started,
// otherwise it will be initialized then started.
// Containers that are already running or have been paused are ignored
// All containers are started independently, in order dictated by their
// dependencies.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were started.
// If map is not nil, an error was encountered when starting one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were started successfully.
func (p *Pod) Start(ctx context.Context) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
if err := p.maybeStartServiceContainer(ctx); err != nil {
return nil, err
}
// Before "regular" containers start in the pod, all init containers
// must have run and exited successfully.
if err := p.startInitContainers(ctx); err != nil {
return nil, err
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
// Build a dependency graph of containers in the pod
graph, err := BuildContainerGraph(allCtrs)
if err != nil {
return nil, fmt.Errorf("generating dependency graph for pod %s: %w", p.ID(), err)
}
// If there are no containers without dependencies, we can't start
// Error out
if len(graph.noDepNodes) == 0 {
return nil, fmt.Errorf("no containers in pod %s have no dependencies, cannot start pod: %w", p.ID(), define.ErrNoSuchCtr)
}
ctrErrors := make(map[string]error)
ctrsVisited := make(map[string]bool)
// Traverse the graph beginning at nodes with no dependencies
for _, node := range graph.noDepNodes {
startNode(ctx, node, false, ctrErrors, ctrsVisited, false)
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("starting some containers: %w", define.ErrPodPartialFail)
}
defer p.newPodEvent(events.Start)
return nil, nil
}
// Stop stops all containers within a pod without a timeout. It assumes -1 for
// a timeout.
func (p *Pod) Stop(ctx context.Context, cleanup bool) (map[string]error, error) {
return p.StopWithTimeout(ctx, cleanup, -1)
}
// StopWithTimeout stops all containers within a pod that are not already stopped
// Each container will use its own stop timeout.
// Only running containers will be stopped. Paused, stopped, or created
// containers will be ignored.
// If cleanup is true, mounts and network namespaces will be cleaned up after
// the container is stopped.
// All containers are stopped independently. An error stopping one container
// will not prevent other containers being stopped.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were stopped.
// If map is not nil, an error was encountered when stopping one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were stopped without error.
func (p *Pod) StopWithTimeout(ctx context.Context, cleanup bool, timeout int) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
return p.stopWithTimeout(ctx, cleanup, timeout)
}
func (p *Pod) stopWithTimeout(ctx context.Context, cleanup bool, timeout int) (map[string]error, error) {
if !p.valid {
return nil, define.ErrPodRemoved
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
// Stopping pods is not ordered by dependency. We haven't seen any case
// where this would actually matter.
ctrErrChan := make(map[string]<-chan error)
// Enqueue a function for each container with the parallel executor.
for _, ctr := range allCtrs {
c := ctr
logrus.Debugf("Adding parallel job to stop container %s", c.ID())
retChan := parallel.Enqueue(ctx, func() error {
// Can't batch these without forcing Stop() to hold the
// lock for the full duration of the timeout.
// We probably don't want to do that.
var err error
if timeout > -1 {
err = c.StopWithTimeout(uint(timeout))
} else {
err = c.Stop()
}
if err != nil && !errors.Is(err, define.ErrCtrStateInvalid) && !errors.Is(err, define.ErrCtrStopped) {
return err
}
if cleanup {
err := c.Cleanup(ctx, false)
if err != nil && !errors.Is(err, define.ErrCtrStateInvalid) && !errors.Is(err, define.ErrCtrStopped) {
return err
}
}
return nil
})
ctrErrChan[c.ID()] = retChan
}
p.newPodEvent(events.Stop)
ctrErrors := make(map[string]error)
// Get returned error for every container we worked on
for id, channel := range ctrErrChan {
if err := <-channel; err != nil {
ctrErrors[id] = err
}
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("stopping some containers: %w", define.ErrPodPartialFail)
}
if err := p.maybeStopServiceContainer(); err != nil {
return nil, err
}
if err := p.updatePod(); err != nil {
return nil, err
}
if err := p.removePodCgroup(); err != nil {
return nil, err
}
return nil, nil
}
// Stops the pod if only the infra containers remains running.
func (p *Pod) stopIfOnlyInfraRemains(ctx context.Context, ignoreID string) error {
p.lock.Lock()
defer p.lock.Unlock()
infraID := ""
if p.HasInfraContainer() {
infra, err := p.infraContainer()
if err != nil {
return err
}
infraID = infra.ID()
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return err
}
for _, ctr := range allCtrs {
if ctr.ID() == infraID || ctr.ID() == ignoreID {
continue
}
state, err := ctr.State()
if err != nil {
return fmt.Errorf("getting state of container %s: %w", ctr.ID(), err)
}
switch state {
case define.ContainerStateExited,
define.ContainerStateRemoving,
define.ContainerStateStopping,
define.ContainerStateUnknown:
continue
default:
return nil
}
}
errs, err := p.stopWithTimeout(ctx, true, -1)
for ctr, e := range errs {
logrus.Errorf("Failed to stop container %s: %v", ctr, e)
}
return err
}
// Cleanup cleans up all containers within a pod that have stopped.
// All containers are cleaned up independently. An error with one container will
// not prevent other containers being cleaned up.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were cleaned up.
// If map is not nil, an error was encountered when working on one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were paused without error
func (p *Pod) Cleanup(ctx context.Context) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
ctrErrChan := make(map[string]<-chan error)
// Enqueue a function for each container with the parallel executor.
for _, ctr := range allCtrs {
c := ctr
logrus.Debugf("Adding parallel job to clean up container %s", c.ID())
retChan := parallel.Enqueue(ctx, func() error {
return c.Cleanup(ctx, false)
})
ctrErrChan[c.ID()] = retChan
}
ctrErrors := make(map[string]error)
// Get returned error for every container we worked on
for id, channel := range ctrErrChan {
if err := <-channel; err != nil {
if errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped) {
continue
}
ctrErrors[id] = err
}
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("cleaning up some containers: %w", define.ErrPodPartialFail)
}
if err := p.maybeStopServiceContainer(); err != nil {
return nil, err
}
return nil, nil
}
// Pause pauses all containers within a pod that are running.
// Only running containers will be paused. Paused, stopped, or created
// containers will be ignored.
// All containers are paused independently. An error pausing one container
// will not prevent other containers being paused.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were paused.
// If map is not nil, an error was encountered when pausing one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were paused without error
func (p *Pod) Pause(ctx context.Context) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
if rootless.IsRootless() {
cgroupv2, err := cgroups.IsCgroup2UnifiedMode()
if err != nil {
return nil, fmt.Errorf("failed to determine cgroupversion: %w", err)
}
if !cgroupv2 {
return nil, fmt.Errorf("can not pause pods containing rootless containers with cgroup V1: %w", define.ErrNoCgroups)
}
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
ctrErrChan := make(map[string]<-chan error)
// Enqueue a function for each container with the parallel executor.
for _, ctr := range allCtrs {
c := ctr
logrus.Debugf("Adding parallel job to pause container %s", c.ID())
retChan := parallel.Enqueue(ctx, c.Pause)
ctrErrChan[c.ID()] = retChan
}
p.newPodEvent(events.Pause)
ctrErrors := make(map[string]error)
// Get returned error for every container we worked on
for id, channel := range ctrErrChan {
if err := <-channel; err != nil {
if errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped) {
continue
}
ctrErrors[id] = err
}
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("pausing some containers: %w", define.ErrPodPartialFail)
}
return nil, nil
}
// Unpause unpauses all containers within a pod that are running.
// Only paused containers will be unpaused. Running, stopped, or created
// containers will be ignored.
// All containers are unpaused independently. An error unpausing one container
// will not prevent other containers being unpaused.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were unpaused.
// If map is not nil, an error was encountered when unpausing one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were unpaused without error.
func (p *Pod) Unpause(ctx context.Context) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
ctrErrChan := make(map[string]<-chan error)
// Enqueue a function for each container with the parallel executor.
for _, ctr := range allCtrs {
c := ctr
logrus.Debugf("Adding parallel job to unpause container %s", c.ID())
retChan := parallel.Enqueue(ctx, c.Unpause)
ctrErrChan[c.ID()] = retChan
}
p.newPodEvent(events.Unpause)
ctrErrors := make(map[string]error)
// Get returned error for every container we worked on
for id, channel := range ctrErrChan {
if err := <-channel; err != nil {
if errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped) {
continue
}
ctrErrors[id] = err
}
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("unpausing some containers: %w", define.ErrPodPartialFail)
}
return nil, nil
}
// Restart restarts all containers within a pod that are not paused or in an error state.
// It combines the effects of Stop() and Start() on a container
// Each container will use its own stop timeout.
// All containers are started independently, in order dictated by their
// dependencies. An error restarting one container
// will not prevent other containers being restarted.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were restarted.
// If map is not nil, an error was encountered when restarting one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were restarted without error.
func (p *Pod) Restart(ctx context.Context) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
if err := p.maybeStartServiceContainer(ctx); err != nil {
return nil, err
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
// Build a dependency graph of containers in the pod
graph, err := BuildContainerGraph(allCtrs)
if err != nil {
return nil, fmt.Errorf("generating dependency graph for pod %s: %w", p.ID(), err)
}
ctrErrors := make(map[string]error)
ctrsVisited := make(map[string]bool)
// If there are no containers without dependencies, we can't start
// Error out
if len(graph.noDepNodes) == 0 {
return nil, fmt.Errorf("no containers in pod %s have no dependencies, cannot start pod: %w", p.ID(), define.ErrNoSuchCtr)
}
// Traverse the graph beginning at nodes with no dependencies
for _, node := range graph.noDepNodes {
startNode(ctx, node, false, ctrErrors, ctrsVisited, true)
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("stopping some containers: %w", define.ErrPodPartialFail)
}
p.newPodEvent(events.Stop)
p.newPodEvent(events.Start)
return nil, nil
}
// Kill sends a signal to all running containers within a pod.
// Signals will only be sent to running containers. Containers that are not
// running will be ignored. All signals are sent independently, and sending will
// continue even if some containers encounter errors.
// An error and a map[string]error are returned.
// If the error is not nil and the map is nil, an error was encountered before
// any containers were signalled.
// If map is not nil, an error was encountered when signalling one or more
// containers. The container ID is mapped to the error encountered. The error is
// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were signalled successfully.
func (p *Pod) Kill(ctx context.Context, signal uint) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
ctrErrChan := make(map[string]<-chan error)
// Enqueue a function for each container with the parallel executor.
for _, ctr := range allCtrs {
c := ctr
logrus.Debugf("Adding parallel job to kill container %s", c.ID())
retChan := parallel.Enqueue(ctx, func() error {
return c.Kill(signal)
})
ctrErrChan[c.ID()] = retChan
}
p.newPodEvent(events.Kill)
ctrErrors := make(map[string]error)
// Get returned error for every container we worked on
for id, channel := range ctrErrChan {
if err := <-channel; err != nil {
if errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped) {
continue
}
ctrErrors[id] = err
}
}
if len(ctrErrors) > 0 {
return ctrErrors, fmt.Errorf("killing some containers: %w", define.ErrPodPartialFail)
}
if err := p.maybeStopServiceContainer(); err != nil {
return nil, err
}
return nil, nil
}
// Status gets the status of all containers in the pod.
// Returns a map of Container ID to Container Status.
func (p *Pod) Status() (map[string]define.ContainerStatus, error) {
p.lock.Lock()
defer p.lock.Unlock()
if !p.valid {
return nil, define.ErrPodRemoved
}
allCtrs, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
noInitCtrs := make([]*Container, 0)
// Do not add init containers into status
for _, ctr := range allCtrs {
if ctrType := ctr.config.InitContainerType; len(ctrType) < 1 {
noInitCtrs = append(noInitCtrs, ctr)
}
}
return containerStatusFromContainers(noInitCtrs)
}
func containerStatusFromContainers(allCtrs []*Container) (map[string]define.ContainerStatus, error) {
status := make(map[string]define.ContainerStatus, len(allCtrs))
for _, ctr := range allCtrs {
state, err := ctr.State()
if err != nil {
return nil, err
}
status[ctr.ID()] = state
}
return status, nil
}
// Inspect returns a PodInspect struct to describe the pod.
func (p *Pod) Inspect() (*define.InspectPodData, error) {
p.lock.Lock()
defer p.lock.Unlock()
if err := p.updatePod(); err != nil {
return nil, err
}
containers, err := p.runtime.state.PodContainers(p)
if err != nil {
return nil, err
}
ctrs := make([]define.InspectPodContainerInfo, 0, len(containers))
ctrStatuses := make(map[string]define.ContainerStatus, len(containers))
for _, c := range containers {
containerStatus := "unknown"
// Ignoring possible errors here because we don't want this to be
// catastrophic in nature
containerState, err := c.State()
if err == nil {
containerStatus = containerState.String()
}
ctrs = append(ctrs, define.InspectPodContainerInfo{
ID: c.ID(),
Name: c.Name(),
State: containerStatus,
})
// Do not add init containers fdr status
if len(c.config.InitContainerType) < 1 {
ctrStatuses[c.ID()] = c.state.State
}
}
podState, err := createPodStatusResults(ctrStatuses)
if err != nil {
return nil, err
}
namespaces := map[string]bool{
"pid": p.config.UsePodPID,
"ipc": p.config.UsePodIPC,
"net": p.config.UsePodNet,
"mount": p.config.UsePodMount,
"user": p.config.UsePodUser,
"uts": p.config.UsePodUTS,
"cgroup": p.config.UsePodCgroupNS,
}
sharesNS := []string{}
for nsStr, include := range namespaces {
if include {
sharesNS = append(sharesNS, nsStr)
}
}
// Infra config contains detailed information on the pod's infra
// container.
var infraConfig *define.InspectPodInfraConfig
var inspectMounts []define.InspectMount
var devices []define.InspectDevice
var infraSecurity []string
if p.state.InfraContainerID != "" {
infra, err := p.runtime.GetContainer(p.state.InfraContainerID)
if err != nil {
return nil, err
}
infraConfig = new(define.InspectPodInfraConfig)
infraConfig.HostNetwork = p.NetworkMode() == "host"
infraConfig.StaticIP = infra.config.ContainerNetworkConfig.StaticIP
infraConfig.NoManageResolvConf = infra.config.UseImageResolvConf
infraConfig.NoManageHostname = infra.config.UseImageHostname
infraConfig.NoManageHosts = infra.config.UseImageHosts
infraConfig.CPUPeriod = p.CPUPeriod()
infraConfig.CPUQuota = p.CPUQuota()
infraConfig.CPUSetCPUs = p.ResourceLim().CPU.Cpus
infraConfig.PidNS = p.NamespaceMode(specs.PIDNamespace)
infraConfig.UserNS = p.NamespaceMode(specs.UserNamespace)
infraConfig.UtsNS = p.NamespaceMode(specs.UTSNamespace)
namedVolumes, mounts := infra.SortUserVolumes(infra.config.Spec)
inspectMounts, err = infra.GetMounts(namedVolumes, infra.config.ImageVolumes, mounts)
infraSecurity = infra.GetSecurityOptions()
if err != nil {
return nil, err
}
if len(infra.config.ContainerNetworkConfig.DNSServer) > 0 {
infraConfig.DNSServer = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSServer))
for _, entry := range infra.config.ContainerNetworkConfig.DNSServer {
infraConfig.DNSServer = append(infraConfig.DNSServer, entry.String())
}
}
if len(infra.config.ContainerNetworkConfig.DNSSearch) > 0 {
infraConfig.DNSSearch = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSSearch))
infraConfig.DNSSearch = append(infraConfig.DNSSearch, infra.config.ContainerNetworkConfig.DNSSearch...)
}
if len(infra.config.ContainerNetworkConfig.DNSOption) > 0 {
infraConfig.DNSOption = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSOption))
infraConfig.DNSOption = append(infraConfig.DNSOption, infra.config.ContainerNetworkConfig.DNSOption...)
}
if len(infra.config.HostAdd) > 0 {
infraConfig.HostAdd = make([]string, 0, len(infra.config.HostAdd))
infraConfig.HostAdd = append(infraConfig.HostAdd, infra.config.HostAdd...)
}
if len(infra.config.BaseHostsFile) > 0 {
infraConfig.HostsFile = infra.config.BaseHostsFile
}
networks, err := infra.networks()
if err != nil {
return nil, err
}
netNames := make([]string, 0, len(networks))
for name := range networks {
netNames = append(netNames, name)
}
if len(netNames) > 0 {
infraConfig.Networks = netNames
}
infraConfig.NetworkOptions = infra.config.ContainerNetworkConfig.NetworkOptions
infraConfig.PortBindings = makeInspectPortBindings(infra.config.ContainerNetworkConfig.PortMappings)
}
inspectData := define.InspectPodData{
ID: p.ID(),
Name: p.Name(),
Namespace: p.Namespace(),
Created: p.CreatedTime(),
CreateCommand: p.config.CreateCommand,
ExitPolicy: string(p.config.ExitPolicy),
State: podState,
Hostname: p.config.Hostname,
Labels: p.Labels(),
CreateCgroup: p.config.UsePodCgroup,
CgroupParent: p.CgroupParent(),
CgroupPath: p.state.CgroupPath,
CreateInfra: infraConfig != nil,
InfraContainerID: p.state.InfraContainerID,
InfraConfig: infraConfig,
SharedNamespaces: sharesNS,
NumContainers: uint(len(containers)),
Containers: ctrs,
CPUSetCPUs: p.ResourceLim().CPU.Cpus,
CPUPeriod: p.CPUPeriod(),
CPUQuota: p.CPUQuota(),
MemoryLimit: p.MemoryLimit(),
Mounts: inspectMounts,
Devices: devices,
BlkioDeviceReadBps: p.BlkiThrottleReadBps(),
VolumesFrom: p.VolumesFrom(),
SecurityOpts: infraSecurity,
MemorySwap: p.MemorySwap(),
BlkioWeight: p.BlkioWeight(),
CPUSetMems: p.CPUSetMems(),
BlkioDeviceWriteBps: p.BlkiThrottleWriteBps(),
CPUShares: p.CPUShares(),
RestartPolicy: p.config.RestartPolicy,
LockNumber: p.lock.ID(),
}
return &inspectData, nil
}
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