Added new flags to 'podman generate systemd' to change the unit name prefix

--container-prefix <string> - default 'container'
Systemd unit name prefix for containers

--pod-prefix <string> - default 'pod'
Systemd unit name prefix for pods

--separator <string> - default '-'
Systemd unit name seperator between name/id and prefix

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

6 files changed, 120 insertions, 4 deletions

diff --git a/cmd/podman/generate/systemd.go b/cmd/podman/generate/systemd.go
index 20d9748d4..75031e070 100644
--- a/cmd/podman/generate/systemd.go
+++ b/cmd/podman/generate/systemd.go
@@ -39,6 +39,9 @@ func init() {
 	flags.UintVarP(&systemdTimeout, "time", "t", containerConfig.Engine.StopTimeout, "Stop timeout override")
 	flags.StringVar(&systemdOptions.RestartPolicy, "restart-policy", "on-failure", "Systemd restart-policy")
 	flags.BoolVarP(&systemdOptions.New, "new", "", false, "Create a new container instead of starting an existing one")
+	flags.StringVar(&systemdOptions.ContainerPrefix, "container-prefix", "container", "Systemd unit name prefix for containers")
+	flags.StringVar(&systemdOptions.PodPrefix, "pod-prefix", "pod", "Systemd unit name prefix for pods")
+	flags.StringVar(&systemdOptions.Separator, "separator", "-", "Systemd unit name seperator between name/id and prefix")
 	flags.SetNormalizeFunc(utils.AliasFlags)
 }
 
diff --git a/completions/bash/podman b/completions/bash/podman
index 9baf7901e..8f02a4b36 100644
--- a/completions/bash/podman
+++ b/completions/bash/podman
@@ -2838,7 +2838,10 @@ _podman_generate_systemd() {
     local options_with_args="
     --restart-policy
     -t
-    --time"
+    --time
+	--container-prefix
+	--pod-prefix
+	--separator"
 
     local boolean_options="
     -h
diff --git a/docs/source/markdown/podman-generate-systemd.1.md b/docs/source/markdown/podman-generate-systemd.1.md
index fa04f81f9..72031b19b 100644
--- a/docs/source/markdown/podman-generate-systemd.1.md
+++ b/docs/source/markdown/podman-generate-systemd.1.md
@@ -40,6 +40,18 @@ Override the default stop timeout for the container with the given value.
 Set the systemd restart policy.  The restart-policy must be one of: "no", "on-success", "on-failure", "on-abnormal",
 "on-watchdog", "on-abort", or "always".  The default policy is *on-failure*.
 
+**--container-prefix**=*prefix*
+
+Set the systemd unit name prefix for containers. The default is *container*.
+
+**--pod-prefix**=*prefix*
+
+Set the systemd unit name prefix for pods. The default is *pod*.
+
+**--separator**=*separator*
+
+Set the systemd unit name seperator between the name/id of a container/pod and the prefix. The default is *-*.
+
 ## Examples
 
 ### Generate and print a systemd unit file for a container
diff --git a/pkg/domain/entities/generate.go b/pkg/domain/entities/generate.go
index edd217615..68a42d897 100644
--- a/pkg/domain/entities/generate.go
+++ b/pkg/domain/entities/generate.go
@@ -14,6 +14,12 @@ type GenerateSystemdOptions struct {
 	RestartPolicy string
 	// StopTimeout - time when stopping the container.
 	StopTimeout *uint
+	// ContainerPrefix - systemd unit name prefix for containers
+	ContainerPrefix string
+	// PodPrefix - systemd unit name prefix for pods
+	PodPrefix string
+	// Separator - systemd unit name seperator between name/id and prefix
+	Separator string
 }
 
 // GenerateSystemdReport
diff --git a/pkg/domain/infra/abi/generate.go b/pkg/domain/infra/abi/generate.go
index be5d452bd..abb5e2911 100644
--- a/pkg/domain/infra/abi/generate.go
+++ b/pkg/domain/infra/abi/generate.go
@@ -159,14 +159,14 @@ func (ic *ContainerEngine) generateSystemdgenContainerInfo(nameOrID string, pod
 func generateServiceName(ctr *libpod.Container, pod *libpod.Pod, options entities.GenerateSystemdOptions) (string, string) {
 	var kind, name, ctrName string
 	if pod == nil {
-		kind = "container"
+		kind = options.ContainerPrefix //defaults to container
 		name = ctr.ID()
 		if options.Name {
 			name = ctr.Name()
 		}
 		ctrName = name
 	} else {
-		kind = "pod"
+		kind = options.PodPrefix //defaults to pod
 		name = pod.ID()
 		ctrName = ctr.ID()
 		if options.Name {
@@ -174,7 +174,7 @@ func generateServiceName(ctr *libpod.Container, pod *libpod.Pod, options entitie
 			ctrName = ctr.Name()
 		}
 	}
-	return ctrName, fmt.Sprintf("%s-%s", kind, name)
+	return ctrName, fmt.Sprintf("%s%s%s", kind, options.Separator, name)
 }
 
 func (ic *ContainerEngine) GenerateKube(ctx context.Context, nameOrID string, options entities.GenerateKubeOptions) (*entities.GenerateKubeReport, error) {
diff --git a/test/e2e/generate_systemd_test.go b/test/e2e/generate_systemd_test.go
index abfca4db9..d5ae441e2 100644
--- a/test/e2e/generate_systemd_test.go
+++ b/test/e2e/generate_systemd_test.go
@@ -233,4 +233,96 @@ var _ = Describe("Podman generate systemd", func() {
 		Expect(session.ExitCode()).To(Equal(125))
 	})
 
+	It("podman generate systemd --container-prefix con", func() {
+		n := podmanTest.Podman([]string{"create", "--name", "foo", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		session := podmanTest.Podman([]string{"generate", "systemd", "--name", "--container-prefix", "con", "foo"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		// Grepping the output (in addition to unit tests)
+		found, _ := session.GrepString("# con-foo.service")
+		Expect(found).To(BeTrue())
+	})
+
+	It("podman generate systemd --separator _", func() {
+		n := podmanTest.Podman([]string{"create", "--name", "foo", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		session := podmanTest.Podman([]string{"generate", "systemd", "--name", "--separator", "_", "foo"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		// Grepping the output (in addition to unit tests)
+		found, _ := session.GrepString("# container_foo.service")
+		Expect(found).To(BeTrue())
+	})
+
+	It("podman generate systemd pod --pod-prefix p", func() {
+		n := podmanTest.Podman([]string{"pod", "create", "--name", "foo"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		n = podmanTest.Podman([]string{"create", "--pod", "foo", "--name", "foo-1", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		n = podmanTest.Podman([]string{"create", "--pod", "foo", "--name", "foo-2", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		session := podmanTest.Podman([]string{"generate", "systemd", "--pod-prefix", "p", "--name", "foo"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		// Grepping the output (in addition to unit tests)
+		found, _ := session.GrepString("# p-foo.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("Requires=container-foo-1.service container-foo-2.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("# container-foo-1.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("BindsTo=p-foo.service")
+		Expect(found).To(BeTrue())
+	})
+
+	It("podman generate systemd pod --pod-prefix p --container-prefix con --separator _ change all prefixes/separator", func() {
+		n := podmanTest.Podman([]string{"pod", "create", "--name", "foo"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		n = podmanTest.Podman([]string{"create", "--pod", "foo", "--name", "foo-1", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		n = podmanTest.Podman([]string{"create", "--pod", "foo", "--name", "foo-2", "alpine", "top"})
+		n.WaitWithDefaultTimeout()
+		Expect(n.ExitCode()).To(Equal(0))
+
+		session := podmanTest.Podman([]string{"generate", "systemd", "--container-prefix", "con", "--pod-prefix", "p", "--separator", "_", "--name", "foo"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		// Grepping the output (in addition to unit tests)
+		found, _ := session.GrepString("# p_foo.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("Requires=con_foo-1.service con_foo-2.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("# con_foo-1.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("# con_foo-2.service")
+		Expect(found).To(BeTrue())
+
+		found, _ = session.GrepString("BindsTo=p_foo.service")
+		Expect(found).To(BeTrue())
+	})
 })