forked from canonical/lxd
/
snapshot.go
70 lines (55 loc) · 1.59 KB
/
snapshot.go
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package main
import (
"fmt"
"github.com/lxc/lxd"
"github.com/lxc/lxd/shared"
"github.com/lxc/lxd/shared/gnuflag"
"github.com/lxc/lxd/shared/i18n"
)
type snapshotCmd struct {
stateful bool
}
func (c *snapshotCmd) showByDefault() bool {
return true
}
func (c *snapshotCmd) usage() string {
return i18n.G(
`Create a read-only snapshot of a container.
lxc snapshot [remote:]<source> <snapshot name> [--stateful]
Creates a snapshot of the container (optionally with the container's memory
state). When --stateful is used, LXD attempts to checkpoint the container's
running state, including process memory state, TCP connections, etc. so that it
can be restored (via lxc restore) at a later time (although some things, e.g.
TCP connections after the TCP timeout window has expired, may not be restored
successfully).
Example:
lxc snapshot u1 snap0`)
}
func (c *snapshotCmd) flags() {
gnuflag.BoolVar(&c.stateful, "stateful", false, i18n.G("Whether or not to snapshot the container's running state"))
}
func (c *snapshotCmd) run(config *lxd.Config, args []string) error {
if len(args) < 1 {
return errArgs
}
var snapname string
if len(args) < 2 {
snapname = ""
} else {
snapname = args[1]
}
remote, name := config.ParseRemoteAndContainer(args[0])
d, err := lxd.NewClient(config, remote)
if err != nil {
return err
}
// we don't allow '/' in snapshot names
if shared.IsSnapshot(snapname) {
return fmt.Errorf(i18n.G("'/' not allowed in snapshot name"))
}
resp, err := d.Snapshot(name, snapname, c.stateful)
if err != nil {
return err
}
return d.WaitForSuccess(resp.Operation)
}