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|
package main
import (
js "encoding/json"
"fmt"
of "github.com/kubernetes-incubator/cri-o/cmd/kpod/formats"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
mountDescription = `
kpod mount
Lists all mounted containers mount points
kpod mount CONTAINER-NAME-OR-ID
Mounts the specified container and outputs the mountpoint
`
mountFlags = []cli.Flag{
cli.BoolFlag{
Name: "notruncate",
Usage: "do not truncate output",
},
cli.StringFlag{
Name: "label",
Usage: "SELinux label for the mount point",
},
cli.StringFlag{
Name: "format",
Usage: "Change the output format to Go template",
},
}
mountCommand = cli.Command{
Name: "mount",
Usage: "Mount a working container's root filesystem",
Description: mountDescription,
Action: mountCmd,
ArgsUsage: "[CONTAINER-NAME-OR-ID]",
Flags: mountFlags,
}
)
// MountOutputParams stores info about each layer
type jsonMountPoint struct {
ID string `json:"id"`
Names []string `json:"names"`
MountPoint string `json:"mountpoint"`
}
func mountCmd(c *cli.Context) error {
formats := map[string]bool{
"": true,
of.JSONString: true,
}
args := c.Args()
json := c.String("format") == of.JSONString
if !formats[c.String("format")] {
return errors.Errorf("%q is not a supported format", c.String("format"))
}
if len(args) > 1 {
return errors.Errorf("too many arguments specified")
}
if err := validateFlags(c, mountFlags); err != nil {
return err
}
config, err := getConfig(c)
if err != nil {
return errors.Wrapf(err, "Could not get config")
}
store, err := getStore(config)
if err != nil {
return errors.Wrapf(err, "error getting store")
}
if len(args) == 1 {
if json {
return errors.Wrapf(err, "json option can not be used with a container id")
}
mountPoint, err := store.Mount(args[0], c.String("label"))
if err != nil {
return errors.Wrapf(err, "error finding container %q", args[0])
}
fmt.Printf("%s\n", mountPoint)
} else {
jsonMountPoints := []jsonMountPoint{}
containers, err2 := store.Containers()
if err2 != nil {
return errors.Wrapf(err2, "error reading list of all containers")
}
for _, container := range containers {
layer, err := store.Layer(container.LayerID)
if err != nil {
return errors.Wrapf(err, "error finding layer %q for container %q", container.LayerID, container.ID)
}
if layer.MountPoint == "" {
continue
}
if json {
jsonMountPoints = append(jsonMountPoints, jsonMountPoint{ID: container.ID, Names: container.Names, MountPoint: layer.MountPoint})
continue
}
if c.Bool("notruncate") {
fmt.Printf("%-64s %s\n", container.ID, layer.MountPoint)
} else {
fmt.Printf("%-12.12s %s\n", container.ID, layer.MountPoint)
}
}
if json {
data, err := js.MarshalIndent(jsonMountPoints, "", " ")
if err != nil {
return err
}
fmt.Printf("%s\n", data)
}
}
return nil
}
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