kube play: sd-notify integration

Integrate sd-notify policies into `kube play`.  The policies can be
configured for all contianers via the `io.containers.sdnotify`
annotation or for indidivual containers via the
`io.containers.sdnotify/$name` annotation.

The `kube play` process will wait for all containers to be ready by
waiting for the individual `READY=1` messages which are received via
the `pkg/systemd/notifyproxy` proxy mechanism.

Also update the simple "container" sd-notify test as it did not fully
test the expected behavior which became obvious when adding the new
tests.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

4 files changed, 26 insertions, 18 deletions

diff --git a/libpod/container_validate.go b/libpod/container_validate.go
index e280c60d2..da33f6db7 100644
--- a/libpod/container_validate.go
+++ b/libpod/container_validate.go
@@ -133,5 +133,9 @@ func (c *Container) validate() error {
 	if len(c.config.InitContainerType) > 0 && len(c.config.Pod) < 1 {
 		return fmt.Errorf("init containers must be created in a pod: %w", define.ErrInvalidArg)
 	}
+
+	if c.config.SdNotifyMode == define.SdNotifyModeIgnore && len(c.config.SdNotifySocket) > 0 {
+		return fmt.Errorf("cannot set sd-notify socket %q with sd-notify mode %q", c.config.SdNotifySocket, c.config.SdNotifyMode)
+	}
 	return nil
 }
diff --git a/libpod/define/config.go b/libpod/define/config.go
index 0181bd31c..34c1a675d 100644
--- a/libpod/define/config.go
+++ b/libpod/define/config.go
@@ -81,13 +81,6 @@ const NoLogging = "none"
 // PassthroughLogging is the string conmon expects when specifying to use the passthrough driver
 const PassthroughLogging = "passthrough"
 
-// Strings used for --sdnotify option to podman
-const (
-	SdNotifyModeContainer = "container"
-	SdNotifyModeConmon    = "conmon"
-	SdNotifyModeIgnore    = "ignore"
-)
-
 // DefaultRlimitValue is the value set by default for nofile and nproc
 const RLimitDefaultValue = uint64(1048576)
 
diff --git a/libpod/define/sdnotify.go b/libpod/define/sdnotify.go
new file mode 100644
index 000000000..1d548c764
--- /dev/null
+++ b/libpod/define/sdnotify.go
@@ -0,0 +1,20 @@
+package define
+
+import "fmt"
+
+// Strings used for --sdnotify option to podman
+const (
+	SdNotifyModeContainer = "container"
+	SdNotifyModeConmon    = "conmon"
+	SdNotifyModeIgnore    = "ignore"
+)
+
+// ValidateSdNotifyMode validates the specified mode.
+func ValidateSdNotifyMode(mode string) error {
+	switch mode {
+	case "", SdNotifyModeContainer, SdNotifyModeConmon, SdNotifyModeIgnore:
+		return nil
+	default:
+		return fmt.Errorf("%w: invalid sdnotify value %q: must be %s, %s or %s", ErrInvalidArg, mode, SdNotifyModeContainer, SdNotifyModeConmon, SdNotifyModeIgnore)
+	}
+}
diff --git a/libpod/options.go b/libpod/options.go
index 933c9a1c3..43ed1ff78 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -6,14 +6,12 @@ import (
 	"net"
 	"os"
 	"path/filepath"
-	"strings"
 	"syscall"
 
 	"github.com/containers/buildah/pkg/parse"
 	nettypes "github.com/containers/common/libnetwork/types"
 	"github.com/containers/common/pkg/config"
 	"github.com/containers/common/pkg/secrets"
-	cutil "github.com/containers/common/pkg/util"
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/podman/v4/libpod/define"
@@ -29,12 +27,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-// Runtime Creation Options
-var (
-	// SdNotifyModeValues describes the only values that SdNotifyMode can be
-	SdNotifyModeValues = []string{define.SdNotifyModeContainer, define.SdNotifyModeConmon, define.SdNotifyModeIgnore}
-)
-
 // WithStorageConfig uses the given configuration to set up container storage.
 // If this is not specified, the system default configuration will be used
 // instead.
@@ -631,9 +623,8 @@ func WithSdNotifyMode(mode string) CtrCreateOption {
 			return define.ErrCtrFinalized
 		}
 
-		// verify values
-		if len(mode) > 0 && !cutil.StringInSlice(strings.ToLower(mode), SdNotifyModeValues) {
-			return fmt.Errorf("--sdnotify values must be one of %q: %w", strings.Join(SdNotifyModeValues, ", "), define.ErrInvalidArg)
+		if err := define.ValidateSdNotifyMode(mode); err != nil {
+			return err
 		}
 
 		ctr.config.SdNotifyMode = mode