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-rw-r--r--cmd/podman/generate/generate.go27
-rw-r--r--cmd/podman/generate/systemd.go57
-rw-r--r--cmd/podman/main.go1
-rw-r--r--pkg/domain/entities/engine_container.go1
-rw-r--r--pkg/domain/entities/generate.go22
-rw-r--r--pkg/domain/infra/abi/generate.go174
-rw-r--r--pkg/domain/infra/tunnel/generate.go12
-rw-r--r--pkg/specgen/generate/container_create.go1
-rw-r--r--test/e2e/generate_systemd_test.go1
-rw-r--r--test/system/250-generate-systemd.bats2
10 files changed, 297 insertions, 1 deletions
diff --git a/cmd/podman/generate/generate.go b/cmd/podman/generate/generate.go
new file mode 100644
index 000000000..f04ef58a5
--- /dev/null
+++ b/cmd/podman/generate/generate.go
@@ -0,0 +1,27 @@
+package pods
+
+import (
+ "github.com/containers/libpod/cmd/podman/registry"
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/containers/libpod/pkg/util"
+ "github.com/spf13/cobra"
+)
+
+var (
+ // Command: podman _generate_
+ generateCmd = &cobra.Command{
+ Use: "generate",
+ Short: "Generate structured data based on containers and pods.",
+ Long: "Generate structured data (e.g., Kubernetes yaml or systemd units) based on containers and pods.",
+ TraverseChildren: true,
+ RunE: registry.SubCommandExists,
+ }
+ containerConfig = util.DefaultContainerConfig()
+)
+
+func init() {
+ registry.Commands = append(registry.Commands, registry.CliCommand{
+ Mode: []entities.EngineMode{entities.ABIMode},
+ Command: generateCmd,
+ })
+}
diff --git a/cmd/podman/generate/systemd.go b/cmd/podman/generate/systemd.go
new file mode 100644
index 000000000..55d770249
--- /dev/null
+++ b/cmd/podman/generate/systemd.go
@@ -0,0 +1,57 @@
+package pods
+
+import (
+ "fmt"
+
+ "github.com/containers/libpod/cmd/podman/registry"
+ "github.com/containers/libpod/cmd/podman/utils"
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/spf13/cobra"
+)
+
+var (
+ systemdTimeout uint
+ systemdOptions = entities.GenerateSystemdOptions{}
+ systemdDescription = `Generate systemd units for a pod or container.
+ The generated units can later be controlled via systemctl(1).`
+
+ systemdCmd = &cobra.Command{
+ Use: "systemd [flags] CTR|POD",
+ Short: "Generate systemd units.",
+ Long: systemdDescription,
+ RunE: systemd,
+ Args: cobra.MinimumNArgs(1),
+ Example: `podman generate systemd CTR
+ podman generate systemd --new --time 10 CTR
+ podman generate systemd --files --name POD`,
+ }
+)
+
+func init() {
+ registry.Commands = append(registry.Commands, registry.CliCommand{
+ Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+ Command: systemdCmd,
+ Parent: generateCmd,
+ })
+ flags := systemdCmd.Flags()
+ flags.BoolVarP(&systemdOptions.Name, "name", "n", false, "Use container/pod names instead of IDs")
+ flags.BoolVarP(&systemdOptions.Files, "files", "f", false, "Generate .service files instead of printing to stdout")
+ 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.SetNormalizeFunc(utils.AliasFlags)
+}
+
+func systemd(cmd *cobra.Command, args []string) error {
+ if cmd.Flags().Changed("time") {
+ systemdOptions.StopTimeout = &systemdTimeout
+ }
+
+ report, err := registry.ContainerEngine().GenerateSystemd(registry.GetContext(), args[0], systemdOptions)
+ if err != nil {
+ return err
+ }
+
+ fmt.Println(report.Output)
+ return nil
+}
diff --git a/cmd/podman/main.go b/cmd/podman/main.go
index 4cd0beee8..481214a38 100644
--- a/cmd/podman/main.go
+++ b/cmd/podman/main.go
@@ -4,6 +4,7 @@ import (
"os"
_ "github.com/containers/libpod/cmd/podman/containers"
+ _ "github.com/containers/libpod/cmd/podman/generate"
_ "github.com/containers/libpod/cmd/podman/healthcheck"
_ "github.com/containers/libpod/cmd/podman/images"
_ "github.com/containers/libpod/cmd/podman/manifest"
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 502279bcf..eebf4c033 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -41,6 +41,7 @@ type ContainerEngine interface {
ContainerUnpause(ctx context.Context, namesOrIds []string, options PauseUnPauseOptions) ([]*PauseUnpauseReport, error)
ContainerWait(ctx context.Context, namesOrIds []string, options WaitOptions) ([]WaitReport, error)
Events(ctx context.Context, opts EventsOptions) error
+ GenerateSystemd(ctx context.Context, nameOrID string, opts GenerateSystemdOptions) (*GenerateSystemdReport, error)
HealthCheckRun(ctx context.Context, nameOrId string, options HealthCheckOptions) (*define.HealthCheckResults, error)
Info(ctx context.Context) (*define.Info, error)
PodCreate(ctx context.Context, opts PodCreateOptions) (*PodCreateReport, error)
diff --git a/pkg/domain/entities/generate.go b/pkg/domain/entities/generate.go
new file mode 100644
index 000000000..6d65b52f8
--- /dev/null
+++ b/pkg/domain/entities/generate.go
@@ -0,0 +1,22 @@
+package entities
+
+// GenerateSystemdOptions control the generation of systemd unit files.
+type GenerateSystemdOptions struct {
+ // Files - generate files instead of printing to stdout.
+ Files bool
+ // Name - use container/pod name instead of its ID.
+ Name bool
+ // New - create a new container instead of starting a new one.
+ New bool
+ // RestartPolicy - systemd restart policy.
+ RestartPolicy string
+ // StopTimeout - time when stopping the container.
+ StopTimeout *uint
+}
+
+// GenerateSystemdReport
+type GenerateSystemdReport struct {
+ // Output of the generate process. Either the generated files or their
+ // entire content.
+ Output string
+}
diff --git a/pkg/domain/infra/abi/generate.go b/pkg/domain/infra/abi/generate.go
new file mode 100644
index 000000000..f69ba560e
--- /dev/null
+++ b/pkg/domain/infra/abi/generate.go
@@ -0,0 +1,174 @@
+package abi
+
+import (
+ "context"
+ "fmt"
+ "strings"
+
+ "github.com/containers/libpod/libpod"
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/containers/libpod/pkg/systemd/generate"
+ "github.com/pkg/errors"
+)
+
+func (ic *ContainerEngine) GenerateSystemd(ctx context.Context, nameOrID string, options entities.GenerateSystemdOptions) (*entities.GenerateSystemdReport, error) {
+ opts := generate.Options{
+ Files: options.Files,
+ New: options.New,
+ }
+
+ // First assume it's a container.
+ if info, found, err := ic.generateSystemdgenContainerInfo(nameOrID, nil, options); found && err != nil {
+ return nil, err
+ } else if found && err == nil {
+ output, err := generate.CreateContainerSystemdUnit(info, opts)
+ if err != nil {
+ return nil, err
+ }
+ return &entities.GenerateSystemdReport{Output: output}, nil
+ }
+
+ // --new does not support pods.
+ if options.New {
+ return nil, errors.Errorf("error generating systemd unit files: cannot generate generic files for a pod")
+ }
+
+ // We're either having a pod or garbage.
+ pod, err := ic.Libpod.LookupPod(nameOrID)
+ if err != nil {
+ return nil, err
+ }
+
+ // Error out if the pod has no infra container, which we require to be the
+ // main service.
+ if !pod.HasInfraContainer() {
+ return nil, fmt.Errorf("error generating systemd unit files: Pod %q has no infra container", pod.Name())
+ }
+
+ // Generate a systemdgen.ContainerInfo for the infra container. This
+ // ContainerInfo acts as the main service of the pod.
+ infraID, err := pod.InfraContainerID()
+ if err != nil {
+ return nil, nil
+ }
+ podInfo, _, err := ic.generateSystemdgenContainerInfo(infraID, pod, options)
+ if err != nil {
+ return nil, err
+ }
+
+ // Compute the container-dependency graph for the Pod.
+ containers, err := pod.AllContainers()
+ if err != nil {
+ return nil, err
+ }
+ if len(containers) == 0 {
+ return nil, fmt.Errorf("error generating systemd unit files: Pod %q has no containers", pod.Name())
+ }
+ graph, err := libpod.BuildContainerGraph(containers)
+ if err != nil {
+ return nil, err
+ }
+
+ // Traverse the dependency graph and create systemdgen.ContainerInfo's for
+ // each container.
+ containerInfos := []*generate.ContainerInfo{podInfo}
+ for ctr, dependencies := range graph.DependencyMap() {
+ // Skip the infra container as we already generated it.
+ if ctr.ID() == infraID {
+ continue
+ }
+ ctrInfo, _, err := ic.generateSystemdgenContainerInfo(ctr.ID(), nil, options)
+ if err != nil {
+ return nil, err
+ }
+ // Now add the container's dependencies and at the container as a
+ // required service of the infra container.
+ for _, dep := range dependencies {
+ if dep.ID() == infraID {
+ ctrInfo.BoundToServices = append(ctrInfo.BoundToServices, podInfo.ServiceName)
+ } else {
+ _, serviceName := generateServiceName(dep, nil, options)
+ ctrInfo.BoundToServices = append(ctrInfo.BoundToServices, serviceName)
+ }
+ }
+ podInfo.RequiredServices = append(podInfo.RequiredServices, ctrInfo.ServiceName)
+ containerInfos = append(containerInfos, ctrInfo)
+ }
+
+ // Now generate the systemd service for all containers.
+ builder := strings.Builder{}
+ for i, info := range containerInfos {
+ if i > 0 {
+ builder.WriteByte('\n')
+ }
+ out, err := generate.CreateContainerSystemdUnit(info, opts)
+ if err != nil {
+ return nil, err
+ }
+ builder.WriteString(out)
+ }
+
+ return &entities.GenerateSystemdReport{Output: builder.String()}, nil
+}
+
+// generateSystemdgenContainerInfo is a helper to generate a
+// systemdgen.ContainerInfo for `GenerateSystemd`.
+func (ic *ContainerEngine) generateSystemdgenContainerInfo(nameOrID string, pod *libpod.Pod, options entities.GenerateSystemdOptions) (*generate.ContainerInfo, bool, error) {
+ ctr, err := ic.Libpod.LookupContainer(nameOrID)
+ if err != nil {
+ return nil, false, err
+ }
+
+ timeout := ctr.StopTimeout()
+ if options.StopTimeout != nil {
+ timeout = *options.StopTimeout
+ }
+
+ config := ctr.Config()
+ conmonPidFile := config.ConmonPidFile
+ if conmonPidFile == "" {
+ return nil, true, errors.Errorf("conmon PID file path is empty, try to recreate the container with --conmon-pidfile flag")
+ }
+
+ createCommand := []string{}
+ if config.CreateCommand != nil {
+ createCommand = config.CreateCommand
+ } else if options.New {
+ return nil, true, errors.Errorf("cannot use --new on container %q: no create command found", nameOrID)
+ }
+
+ name, serviceName := generateServiceName(ctr, pod, options)
+ info := &generate.ContainerInfo{
+ ServiceName: serviceName,
+ ContainerName: name,
+ RestartPolicy: options.RestartPolicy,
+ PIDFile: conmonPidFile,
+ StopTimeout: timeout,
+ GenerateTimestamp: true,
+ CreateCommand: createCommand,
+ }
+
+ return info, true, nil
+}
+
+// generateServiceName generates the container name and the service name for systemd service.
+func generateServiceName(ctr *libpod.Container, pod *libpod.Pod, options entities.GenerateSystemdOptions) (string, string) {
+ var kind, name, ctrName string
+ if pod == nil {
+ kind = "container"
+ name = ctr.ID()
+ if options.Name {
+ name = ctr.Name()
+ }
+ ctrName = name
+ } else {
+ kind = "pod"
+ name = pod.ID()
+ ctrName = ctr.ID()
+ if options.Name {
+ name = pod.Name()
+ ctrName = ctr.Name()
+ }
+ }
+ return ctrName, fmt.Sprintf("%s-%s", kind, name)
+}
diff --git a/pkg/domain/infra/tunnel/generate.go b/pkg/domain/infra/tunnel/generate.go
new file mode 100644
index 000000000..3cd483053
--- /dev/null
+++ b/pkg/domain/infra/tunnel/generate.go
@@ -0,0 +1,12 @@
+package tunnel
+
+import (
+ "context"
+
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/pkg/errors"
+)
+
+func (ic *ContainerEngine) GenerateSystemd(ctx context.Context, nameOrID string, options entities.GenerateSystemdOptions) (*entities.GenerateSystemdReport, error) {
+ return nil, errors.New("not implemented for tunnel")
+}
diff --git a/pkg/specgen/generate/container_create.go b/pkg/specgen/generate/container_create.go
index bb84f0618..01ddcf9c8 100644
--- a/pkg/specgen/generate/container_create.go
+++ b/pkg/specgen/generate/container_create.go
@@ -76,6 +76,7 @@ func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGener
}
options := []libpod.CtrCreateOption{}
+ options = append(options, libpod.WithCreateCommand())
var newImage *image.Image
if s.Rootfs != "" {
diff --git a/test/e2e/generate_systemd_test.go b/test/e2e/generate_systemd_test.go
index 2901e7ac6..abfca4db9 100644
--- a/test/e2e/generate_systemd_test.go
+++ b/test/e2e/generate_systemd_test.go
@@ -18,7 +18,6 @@ var _ = Describe("Podman generate systemd", func() {
)
BeforeEach(func() {
- Skip(v2fail)
tempdir, err = CreateTempDirInTempDir()
if err != nil {
os.Exit(1)
diff --git a/test/system/250-generate-systemd.bats b/test/system/250-generate-systemd.bats
index 80199af5f..6155d6ace 100644
--- a/test/system/250-generate-systemd.bats
+++ b/test/system/250-generate-systemd.bats
@@ -10,6 +10,8 @@ SERVICE_NAME="podman_test_$(random_string)"
UNIT_DIR="$HOME/.config/systemd/user"
UNIT_FILE="$UNIT_DIR/$SERVICE_NAME.service"
+# FIXME: the must run as root (because of CI). It's also broken...
+
function setup() {
skip_if_not_systemd
skip_if_remote
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-18 09:12:26 +0000