Add event logging to libpod, even display to podman

In lipod, we now log major events that occurr.  These events
can be displayed using the `podman events` command. Each
event contains:

* Type (container, image, volume, pod...)
* Status (create, rm, stop, kill, ....)
* Timestamp in RFC3339Nano format
* Name (if applicable)
* Image (if applicable)

The format of the event and the varlink endpoint are to not
be considered stable until cockpit has done its enablement.

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/cmd/podman/events.go b/cmd/podman/events.go
new file mode 100644
index 000000000..dda9a03f9
--- /dev/null
+++ b/cmd/podman/events.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"github.com/containers/libpod/cmd/podman/cliconfig"
+	"github.com/containers/libpod/pkg/adapter"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var (
+	eventsCommand     cliconfig.EventValues
+	eventsDescription = "Monitor podman events"
+	_eventsCommand    = &cobra.Command{
+		Use:   "events [flags]",
+		Short: "show podman events",
+		Long:  eventsDescription,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			eventsCommand.InputArgs = args
+			eventsCommand.GlobalFlags = MainGlobalOpts
+			return eventsCmd(&eventsCommand)
+		},
+		Example: `podman events
+  podman events --filter event=create
+  podman events --since 1h30s`,
+	}
+)
+
+func init() {
+	eventsCommand.Command = _eventsCommand
+	eventsCommand.SetUsageTemplate(UsageTemplate())
+	flags := eventsCommand.Flags()
+	flags.StringArrayVar(&eventsCommand.Filter, "filter", []string{}, "filter output")
+	flags.StringVar(&eventsCommand.Format, "format", "", "format the output using a Go template")
+	flags.BoolVar(&eventsCommand.Stream, "stream", true, "stream new events; for testing only")
+	flags.StringVar(&eventsCommand.Since, "since", "", "show all events created since timestamp")
+	flags.StringVar(&eventsCommand.Until, "until", "", "show all events until timestamp")
+	flags.MarkHidden("stream")
+}
+
+func eventsCmd(c *cliconfig.EventValues) error {
+	runtime, err := adapter.GetRuntime(&c.PodmanCommand)
+	if err != nil {
+		return errors.Wrapf(err, "error creating libpod runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	return runtime.Events(c)
+}