コード例 #1
0
ファイル: managers_test.go プロジェクト: clobrano/snappy
func (ms *mgrsSuite) TestHappyRevert(c *C) {
	st := ms.o.State()
	st.Lock()
	defer st.Unlock()

	x1Yaml := `name: foo
version: 1.0
apps:
 x1:
  command: bin/bar
`
	x1binary := filepath.Join(dirs.SnapBinariesDir, "foo.x1")

	x2Yaml := `name: foo
version: 2.0
apps:
 x2:
  command: bin/bar
`
	x2binary := filepath.Join(dirs.SnapBinariesDir, "foo.x2")

	ms.installLocalTestSnap(c, x1Yaml)
	ms.installLocalTestSnap(c, x2Yaml)

	// ensure we are on x2
	_, err := os.Lstat(x2binary)
	c.Assert(err, IsNil)
	_, err = os.Lstat(x1binary)
	c.Assert(err, ErrorMatches, ".*no such file.*")

	// now do the revert
	ts, err := snapstate.Revert(st, "foo", snapstate.Flags(0))
	c.Assert(err, IsNil)
	chg := st.NewChange("revert-snap", "...")
	chg.AddAll(ts)

	st.Unlock()
	err = ms.o.Settle()
	st.Lock()
	c.Assert(err, IsNil)

	c.Assert(chg.Status(), Equals, state.DoneStatus, Commentf("revert-snap change failed with: %v", chg.Err()))

	// ensure that we use x1 now
	_, err = os.Lstat(x1binary)
	c.Assert(err, IsNil)
	_, err = os.Lstat(x2binary)
	c.Assert(err, ErrorMatches, ".*no such file.*")

	// ensure that x1,x2 is still there, revert just moves the "current"
	// pointer
	for _, fn := range []string{"foo_x2.snap", "foo_x1.snap"} {
		p := filepath.Join(dirs.SnapBlobDir, fn)
		c.Assert(osutil.FileExists(p), Equals, true)
	}
}
コード例 #2
0
ファイル: api.go プロジェクト: clobrano/snappy
func modeFlags(devMode, jailMode bool) (snapstate.Flags, error) {
	devModeOS := release.ReleaseInfo.ForceDevMode()
	flags := snapstate.Flags(0)
	if jailMode {
		if devModeOS {
			return 0, errNoJailMode
		}
		if devMode {
			return 0, errModeConflict
		}
		flags |= snapstate.JailMode
	}
	if devMode || devModeOS {
		flags |= snapstate.DevMode
	}

	return flags, nil

}
コード例 #3
0
ファイル: booted.go プロジェクト: clobrano/snappy
// UpdateRevisions synchronizes the active kernel and OS snap versions with
// the versions that actually booted. This is needed because a
// system may install "os=v2" but that fails to boot. The bootloader
// fallback logic will revert to "os=v1" but on the filesystem snappy
// still has the "active" version set to "v2" which is
// misleading. This code will check what kernel/os booted and set
// those versions active.
func UpdateRevisions(ovld *overlord.Overlord) error {
	const errorPrefix = "cannot update revisions after boot changes: "

	if release.OnClassic {
		return nil
	}

	bootloader, err := partition.FindBootloader()
	if err != nil {
		return fmt.Errorf(errorPrefix+"%s", err)
	}

	bv := "snap_kernel"
	kernelSnap, err := bootloader.GetBootVar(bv)
	if err != nil {
		return fmt.Errorf(errorPrefix+"%s", err)
	}
	bv = "snap_core"
	osSnap, err := bootloader.GetBootVar(bv)
	if err != nil {
		return fmt.Errorf(errorPrefix+"%s", err)
	}

	st := ovld.State()
	st.Lock()
	installed, err := snapstate.All(st)
	if err != nil {
		return fmt.Errorf(errorPrefix+"%s", err)
	}

	var tsAll []*state.TaskSet
	for _, snapNameAndRevno := range []string{kernelSnap, osSnap} {
		name, rev, err := nameAndRevnoFromSnap(snapNameAndRevno)
		if err != nil {
			logger.Noticef("cannot parse %q: %s", snapNameAndRevno, err)
			continue
		}
		for snapName, snapState := range installed {
			if name == snapName {
				if rev != snapState.Current {
					ts, err := snapstate.RevertToRevision(st, name, rev, snapstate.Flags(0))
					if err != nil {
						return err
					}
					tsAll = append(tsAll, ts)
				}
			}
		}
	}
	st.Unlock()

	if len(tsAll) == 0 {
		return nil
	}

	st.Lock()
	msg := fmt.Sprintf("Update kernel and core snap revisions")
	chg := st.NewChange("update-revisions", msg)
	for _, ts := range tsAll {
		chg.AddAll(ts)
	}
	st.Unlock()

	// do it and wait for ready
	ovld.Loop()

	timeoutTime := 10 * time.Second
	st.EnsureBefore(0)
	select {
	case <-chg.Ready():
	case <-time.After(timeoutTime):
		return fmt.Errorf("change did not apply after %s", timeoutTime)
	}

	st.Lock()
	status := chg.Status()
	err = chg.Err()
	st.Unlock()
	if status != state.DoneStatus {
		ovld.Stop()
		return fmt.Errorf(errorPrefix+"%s", err)
	}

	return ovld.Stop()
}
コード例 #4
0
ファイル: firstboot.go プロジェクト: clobrano/snappy
func populateStateFromSeed() error {
	if osutil.FileExists(dirs.SnapStateFile) {
		return fmt.Errorf("cannot create state: state %q already exists", dirs.SnapStateFile)
	}

	ovld, err := overlord.New()
	if err != nil {
		return err
	}
	st := ovld.State()

	// ack all initial assertions
	if err := importAssertionsFromSeed(st); err != nil {
		return err
	}

	seed, err := snap.ReadSeedYaml(filepath.Join(dirs.SnapSeedDir, "seed.yaml"))
	if err != nil {
		return err
	}

	tsAll := []*state.TaskSet{}
	for i, sn := range seed.Snaps {
		st.Lock()

		flags := snapstate.Flags(0)
		if sn.DevMode {
			flags |= snapstate.DevMode
		}
		path := filepath.Join(dirs.SnapSeedDir, "snaps", sn.File)

		var sideInfo snap.SideInfo
		if sn.Unasserted {
			sideInfo.RealName = sn.Name
		} else {
			si, err := snapasserts.DeriveSideInfo(path, assertstate.DB(st))
			if err == asserts.ErrNotFound {
				st.Unlock()
				return fmt.Errorf("cannot find signatures with metadata for snap %q (%q)", sn.Name, path)
			}
			if err != nil {
				st.Unlock()
				return err
			}
			sideInfo = *si
			sideInfo.Private = sn.Private
		}

		ts, err := snapstate.InstallPath(st, &sideInfo, path, sn.Channel, flags)
		if i > 0 {
			ts.WaitAll(tsAll[i-1])
		}
		st.Unlock()

		if err != nil {
			return err
		}

		tsAll = append(tsAll, ts)
	}
	if len(tsAll) == 0 {
		return nil
	}

	st.Lock()
	msg := fmt.Sprintf("First boot seeding")
	chg := st.NewChange("seed", msg)
	for _, ts := range tsAll {
		chg.AddAll(ts)
	}
	st.Unlock()

	// do it and wait for ready
	ovld.Loop()

	st.EnsureBefore(0)
	<-chg.Ready()

	st.Lock()
	status := chg.Status()
	err = chg.Err()
	st.Unlock()
	if status != state.DoneStatus {
		ovld.Stop()
		return fmt.Errorf("cannot run seed change: %s", err)

	}

	return ovld.Stop()
}