Generate systemd unit files for containers

the podman generate systemd command will generate a systemd unit file
based on the attributes of an existing container and user inputs.  the
command outputs the unit file to stdout for the user to copy or
redirect.  it is enabled for the remote client as well.

users can set a restart policy as well as define a stop timeout
override for the container.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/pkg/varlinkapi/generate.go b/pkg/varlinkapi/generate.go
index bc600c397..9dc20d582 100644
--- a/pkg/varlinkapi/generate.go
+++ b/pkg/varlinkapi/generate.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"github.com/containers/libpod/cmd/podman/shared"
 	iopodman "github.com/containers/libpod/cmd/podman/varlink"
+	"github.com/containers/libpod/pkg/systemdgen"
 )
 
 // GenerateKube ...
@@ -28,3 +29,24 @@ func (i *LibpodAPI) GenerateKube(call iopodman.VarlinkCall, name string, service
 		Service: string(servB),
 	})
 }
+
+// GenerateSystemd ...
+func (i *LibpodAPI) GenerateSystemd(call iopodman.VarlinkCall, nameOrID, restart string, stopTimeout int64, useName bool) error {
+	ctr, err := i.Runtime.LookupContainer(nameOrID)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	timeout := int(ctr.StopTimeout())
+	if stopTimeout >= 0 {
+		timeout = int(stopTimeout)
+	}
+	name := ctr.ID()
+	if useName {
+		name = ctr.Name()
+	}
+	unit, err := systemdgen.CreateSystemdUnitAsString(name, ctr.ID(), restart, ctr.Config().StaticDir, timeout)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	return call.ReplyGenerateSystemd(unit)
+}