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authorAshley Cui <acui@redhat.com>2021-03-30 02:30:28 -0400
committerAshley Cui <acui@redhat.com>2021-03-30 14:56:21 -0400
commitef4e91a59eed957e56bf1536bc03df94cd096576 (patch)
tree4a72e690181c5e0bfada6e67424197b10d459b12 /cmd/podman
parent5e28b35aa511e699dffb2172458fda35ac01a4d2 (diff)
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Add podman machine list
podman machine list lists all virtual machines & indicates the default VM connection, if it exists. it also can take a --format flag arg as a go template. [NO TESTS NEEDED] Signed-off-by: Ashley Cui <acui@redhat.com>
Diffstat (limited to 'cmd/podman')
-rw-r--r--cmd/podman/machine/list.go143
1 files changed, 143 insertions, 0 deletions
diff --git a/cmd/podman/machine/list.go b/cmd/podman/machine/list.go
new file mode 100644
index 000000000..3c8368c6b
--- /dev/null
+++ b/cmd/podman/machine/list.go
@@ -0,0 +1,143 @@
+// +build amd64,linux arm64,linux amd64,darwin arm64,darwin
+
+package machine
+
+import (
+ "os"
+ "sort"
+ "text/tabwriter"
+ "text/template"
+ "time"
+
+ "github.com/containers/common/pkg/completion"
+ "github.com/containers/common/pkg/config"
+ "github.com/containers/common/pkg/report"
+ "github.com/containers/podman/v3/cmd/podman/parse"
+ "github.com/containers/podman/v3/cmd/podman/registry"
+ "github.com/containers/podman/v3/cmd/podman/validate"
+ "github.com/containers/podman/v3/pkg/domain/entities"
+ "github.com/containers/podman/v3/pkg/machine"
+ "github.com/containers/podman/v3/pkg/machine/qemu"
+ "github.com/docker/go-units"
+ "github.com/pkg/errors"
+ "github.com/spf13/cobra"
+)
+
+var (
+ lsCmd = &cobra.Command{
+ Use: "list [options]",
+ Aliases: []string{"ls"},
+ Short: "List machines",
+ Long: "List Podman managed virtual machines.",
+ RunE: list,
+ Args: validate.NoArgs,
+ Example: `podman machine list,
+ podman machine ls`,
+ ValidArgsFunction: completion.AutocompleteNone,
+ }
+ listFlag = listFlagType{}
+)
+
+type listFlagType struct {
+ format string
+ noHeading bool
+}
+
+type machineReporter struct {
+ Name string
+ Created string
+ LastUp string
+ VMType string
+}
+
+func init() {
+ registry.Commands = append(registry.Commands, registry.CliCommand{
+ Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+ Command: lsCmd,
+ Parent: machineCmd,
+ })
+
+ flags := lsCmd.Flags()
+ formatFlagName := "format"
+ flags.StringVar(&listFlag.format, formatFlagName, "{{.Name}}\t{{.VMType}}\t{{.Created}}\t{{.LastUp}}\n", "Format volume output using Go template")
+ _ = lsCmd.RegisterFlagCompletionFunc(formatFlagName, completion.AutocompleteNone)
+}
+
+func list(cmd *cobra.Command, args []string) error {
+ var opts machine.ListOptions
+ // We only have qemu VM's for now
+ listResponse, err := qemu.List(opts)
+ if err != nil {
+ return errors.Wrap(err, "error listing vms")
+ }
+
+ // Sort by last run
+ sort.Slice(listResponse, func(i, j int) bool {
+ return listResponse[i].LastUp.After(listResponse[j].LastUp)
+ })
+ // Bring currently running machines to top
+ sort.Slice(listResponse, func(i, j int) bool {
+ return listResponse[i].Running
+ })
+ machineReporter, err := toHumanFormat(listResponse)
+ if err != nil {
+ return err
+ }
+
+ return outputTemplate(cmd, machineReporter)
+}
+
+func outputTemplate(cmd *cobra.Command, responses []*machineReporter) error {
+ headers := report.Headers(machineReporter{}, map[string]string{
+ "LastUp": "LAST UP",
+ "VmType": "VM TYPE",
+ })
+
+ row := report.NormalizeFormat(listFlag.format)
+ format := parse.EnforceRange(row)
+
+ tmpl, err := template.New("list machines").Parse(format)
+ if err != nil {
+ return err
+ }
+ w := tabwriter.NewWriter(os.Stdout, 12, 2, 2, ' ', 0)
+ defer w.Flush()
+
+ if cmd.Flags().Changed("format") && !parse.HasTable(listFlag.format) {
+ listFlag.noHeading = true
+ }
+
+ if !listFlag.noHeading {
+ if err := tmpl.Execute(w, headers); err != nil {
+ return errors.Wrapf(err, "failed to write report column headers")
+ }
+ }
+ return tmpl.Execute(w, responses)
+}
+
+func toHumanFormat(vms []*machine.ListResponse) ([]*machineReporter, error) {
+ cfg, err := config.ReadCustomConfig()
+ if err != nil {
+ return nil, err
+ }
+
+ humanResponses := make([]*machineReporter, 0, len(vms))
+ for _, vm := range vms {
+ response := new(machineReporter)
+ if vm.Name == cfg.Engine.ActiveService {
+ response.Name = vm.Name + "*"
+ } else {
+ response.Name = vm.Name
+ }
+ if vm.Running {
+ response.LastUp = "Currently running"
+ } else {
+ response.LastUp = units.HumanDuration(time.Since(vm.LastUp)) + " ago"
+ }
+ response.Created = units.HumanDuration(time.Since(vm.CreatedAt)) + " ago"
+ response.VMType = vm.VMType
+
+ humanResponses = append(humanResponses, response)
+ }
+ return humanResponses, nil
+}