Move pod jobs to parallel execution

Make Podman pod operations that do not involve starting
containers (which needs to be done in a specific order) use the
same parallel operation code we use to make `podman stop` on
large numbers of containers fast. We were previously stopping
containers in a pod serially, which could take up to the timeout
(default 15 seconds) for each container - stopping 100 containers
that do not respond to SIGTERM would take 25 minutes.

To do this, refactor the parallel operation code a bit to remove
its dependency on libpod (damn circular import restrictions...)
and use parallel functions that just re-use the standard
container API operations - maximizes code reuse (previously each
pod handler had a separate implementation of the container
function it performed).

This is a bit of a palate cleanser after fighting CI for two
days - nice to be able to return to a land of sanity.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

1 files changed, 3 insertions, 3 deletions

diff --git a/pkg/domain/infra/abi/containers.go b/pkg/domain/infra/abi/containers.go
index d92911e0c..0107e18c4 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -23,7 +23,7 @@ import (
 	"github.com/containers/podman/v2/pkg/checkpoint"
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/containers/podman/v2/pkg/domain/infra/abi/terminal"
-	"github.com/containers/podman/v2/pkg/parallel"
+	parallelctr "github.com/containers/podman/v2/pkg/parallel/ctr"
 	"github.com/containers/podman/v2/pkg/ps"
 	"github.com/containers/podman/v2/pkg/rootless"
 	"github.com/containers/podman/v2/pkg/signal"
@@ -157,7 +157,7 @@ func (ic *ContainerEngine) ContainerStop(ctx context.Context, namesOrIds []strin
 	if err != nil && !(options.Ignore && errors.Cause(err) == define.ErrNoSuchCtr) {
 		return nil, err
 	}
-	errMap, err := parallel.ContainerOp(ctx, ctrs, func(c *libpod.Container) error {
+	errMap, err := parallelctr.ContainerOp(ctx, ctrs, func(c *libpod.Container) error {
 		var err error
 		if options.Timeout != nil {
 			err = c.StopWithTimeout(*options.Timeout)
@@ -321,7 +321,7 @@ func (ic *ContainerEngine) ContainerRm(ctx context.Context, namesOrIds []string,
 		return reports, nil
 	}
 
-	errMap, err := parallel.ContainerOp(ctx, ctrs, func(c *libpod.Container) error {
+	errMap, err := parallelctr.ContainerOp(ctx, ctrs, func(c *libpod.Container) error {
 		err := ic.Libpod.RemoveContainer(ctx, c, options.Force, options.Volumes)
 		if err != nil {
 			if options.Ignore && errors.Cause(err) == define.ErrNoSuchCtr {