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authorMatthew Heon <mheon@redhat.com>2020-08-17 11:04:26 -0400
committerMatthew Heon <mheon@redhat.com>2020-08-17 11:04:26 -0400
commitc4b2078508a45843034a86916b37a52d3e34d20d (patch)
tree3404853e70e2243d8b4ecdb7080ddbcd52aafa97 /libpod
parenta0719398931d59a422835b7e4cc7b6e28c18d031 (diff)
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Clean up pods before returning from Pod Stop API call
This should help alleviate races where the pod is not fully cleaned up before subsequent API calls happen. Signed-off-by: Matthew Heon <mheon@redhat.com>
Diffstat (limited to 'libpod')
-rw-r--r--libpod/pod_api.go134
1 files changed, 103 insertions, 31 deletions
diff --git a/libpod/pod_api.go b/libpod/pod_api.go
index 4cb604683..ec4cc08f7 100644
--- a/libpod/pod_api.go
+++ b/libpod/pod_api.go
@@ -11,20 +11,20 @@ import (
"github.com/sirupsen/logrus"
)
-// Start starts all containers within a pod
-// It combines the effects of Init() and Start() on a container
+// 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
+// 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
+// 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 ErrCtrExists
-// If both error and the map are nil, all containers were started successfully
+// 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()
@@ -72,20 +72,20 @@ func (p *Pod) Stop(ctx context.Context, cleanup bool) (map[string]error, error)
}
// StopWithTimeout stops all containers within a pod that are not already stopped
-// Each container will use its own stop timeout
+// 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
+// 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
+// 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 ErrCtrExists
-// If both error and the map are nil, all containers were stopped without error
+// 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()
@@ -138,10 +138,82 @@ func (p *Pod) StopWithTimeout(ctx context.Context, cleanup bool, timeout int) (m
ctr.lock.Unlock()
}
+ p.newPodEvent(events.Stop)
+
if len(ctrErrors) > 0 {
return ctrErrors, errors.Wrapf(define.ErrPodPartialFail, "error stopping some containers")
}
- defer p.newPodEvent(events.Stop)
+ return nil, nil
+}
+
+// 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
+ }
+
+ ctrErrors := make(map[string]error)
+
+ // Clean up all containers
+ for _, ctr := range allCtrs {
+ ctr.lock.Lock()
+
+ if err := ctr.syncContainer(); err != nil {
+ ctr.lock.Unlock()
+ ctrErrors[ctr.ID()] = err
+ continue
+ }
+
+ // Ignore containers that are running/paused
+ if !ctr.ensureState(define.ContainerStateConfigured, define.ContainerStateCreated, define.ContainerStateStopped, define.ContainerStateExited) {
+ ctr.lock.Unlock()
+ continue
+ }
+
+ // Check for running exec sessions, ignore containers with them.
+ sessions, err := ctr.getActiveExecSessions()
+ if err != nil {
+ ctr.lock.Unlock()
+ ctrErrors[ctr.ID()] = err
+ continue
+ }
+ if len(sessions) > 0 {
+ ctr.lock.Unlock()
+ continue
+ }
+
+ // TODO: Should we handle restart policy here?
+
+ ctr.newContainerEvent(events.Cleanup)
+
+ if err := ctr.cleanup(ctx); err != nil {
+ ctrErrors[ctr.ID()] = err
+ }
+
+ ctr.lock.Unlock()
+ }
+
+ if len(ctrErrors) > 0 {
+ return ctrErrors, errors.Wrapf(define.ErrPodPartialFail, "error cleaning up some containers")
+ }
+
return nil, nil
}
@@ -150,12 +222,12 @@ func (p *Pod) StopWithTimeout(ctx context.Context, cleanup bool, timeout int) (m
// 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
+// 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
+// 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 ErrCtrExists
+// set to ErrPodPartialFail.
// If both error and the map are nil, all containers were paused without error
func (p *Pod) Pause() (map[string]error, error) {
p.lock.Lock()
@@ -219,13 +291,13 @@ func (p *Pod) Pause() (map[string]error, error) {
// 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
+// 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
+// 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 ErrCtrExists
-// If both error and the map are nil, all containers were unpaused without error
+// set to ErrPodPartialFail.
+// If both error and the map are nil, all containers were unpaused without error.
func (p *Pod) Unpause() (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
@@ -280,13 +352,13 @@ func (p *Pod) Unpause() (map[string]error, error) {
// 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
+// 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
+// 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 ErrCtrExists
-// If both error and the map are nil, all containers were restarted without error
+// 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()
@@ -328,17 +400,17 @@ func (p *Pod) Restart(ctx context.Context) (map[string]error, error) {
return nil, nil
}
-// Kill sends a signal to all running containers within a pod
+// 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
+// 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
+// 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 ErrCtrExists
-// If both error and the map are nil, all containers were signalled successfully
+// set to ErrPodPartialFail.
+// If both error and the map are nil, all containers were signalled successfully.
func (p *Pod) Kill(signal uint) (map[string]error, error) {
p.lock.Lock()
defer p.lock.Unlock()
@@ -393,8 +465,8 @@ func (p *Pod) Kill(signal uint) (map[string]error, error) {
return nil, nil
}
-// Status gets the status of all containers in the pod
-// Returns a map of Container ID to Container Status
+// 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()
@@ -430,7 +502,7 @@ func containerStatusFromContainers(allCtrs []*Container) (map[string]define.Cont
return status, nil
}
-// Inspect returns a PodInspect struct to describe the pod
+// Inspect returns a PodInspect struct to describe the pod.
func (p *Pod) Inspect() (*define.InspectPodData, error) {
p.lock.Lock()
defer p.lock.Unlock()