func (s *RunHookSuite) TestRunHook(c *C) {
uuid, err := utils.NewUUID()
c.Assert(err, IsNil)
for i, t := range runHookTests {
c.Logf("test %d: %s; perm %v", i, t.summary, t.spec.perm)
ctx := s.GetHookContext(c, uuid.String(), t.relid, t.remote)
var charmDir, outPath string
if t.spec.perm == 0 {
charmDir = c.MkDir()
} else {
spec := t.spec
spec.name = "something-happened"
c.Logf("makeCharm %#v", spec)
charmDir, outPath = makeCharm(c, spec)
}
toolsDir := c.MkDir()
t0 := time.Now()
err := ctx.RunHook("something-happened", charmDir, toolsDir, "/path/to/socket")
if t.err == "" {
c.Assert(err, IsNil)
} else {
c.Assert(err, ErrorMatches, t.err)
}
if t.env != nil {
env := map[string]string{"PATH": toolsDir + ":" + os.Getenv("PATH")}
for k, v := range t.env {
env[k] = v
}
AssertEnv(c, outPath, charmDir, env, uuid.String())
}
if t.spec.background != "" && time.Now().Sub(t0) > 5*time.Second {
c.Errorf("background process holding up hook execution")
}
}
}
func (uuidSuite) TestUUID(c *C) {
uuid, err := utils.NewUUID()
c.Assert(err, IsNil)
uuidCopy := uuid.Copy()
uuidRaw := uuid.Raw()
uuidStr := uuid.String()
c.Assert(uuidRaw, HasLen, 16)
c.Assert(uuidStr, checkers.Satisfies, utils.IsValidUUIDString)
uuid[0] = 0x00
uuidCopy[0] = 0xFF
c.Assert(uuid, Not(DeepEquals), uuidCopy)
uuidRaw[0] = 0xFF
c.Assert(uuid, Not(DeepEquals), uuidRaw)
nextUUID, err := utils.NewUUID()
c.Assert(err, IsNil)
c.Assert(uuid, Not(DeepEquals), nextUUID)
}
func (p *Provisioner) startMachine(m *state.Machine) error {
// TODO(dfc) the state.Info passed to environ.StartInstance remains contentious
// however as the PA only knows one state.Info, and that info is used by MAs and
// UAs to locate the state for this environment, it is logical to use the same
// state.Info as the PA.
stateInfo, apiInfo, err := p.setupAuthentication(m)
if err != nil {
return err
}
cons, err := m.Constraints()
if err != nil {
return err
}
// Generate a unique nonce for the new instance.
uuid, err := utils.NewUUID()
if err != nil {
return err
}
// Generated nonce has the format: "machine-#:UUID". The first
// part is a badge, specifying the tag of the machine the provisioner
// is running on, while the second part is a random UUID.
nonce := fmt.Sprintf("%s:%s", state.MachineTag(p.machineId), uuid.String())
inst, err := p.environ.StartInstance(m.Id(), nonce, m.Series(), cons, stateInfo, apiInfo)
if err != nil {
// Set the state to error, so the machine will be skipped next
// time until the error is resolved, but don't return an
// error; just keep going with the other machines.
log.Errorf("worker/provisioner: cannot start instance for machine %q: %v", m, err)
if err1 := m.SetStatus(params.StatusError, err.Error()); err1 != nil {
// Something is wrong with this machine, better report it back.
log.Errorf("worker/provisioner: cannot set error status for machine %q: %v", m, err1)
return err1
}
return nil
}
if err := m.SetProvisioned(inst.Id(), nonce); err != nil {
// The machine is started, but we can't record the mapping in
// state. It'll keep running while we fail out and restart,
// but will then be detected by findUnknownInstances and
// killed again.
//
// TODO(dimitern) Stop the instance right away here.
//
// Multiple instantiations of a given machine (with the same
// machine ID) cannot coexist, because findUnknownInstances is
// called before startMachines. However, if the first machine
// had started to do work before being replaced, we may
// encounter surprising problems.
return err
}
// populate the local cache
p.instances[m.Id()] = inst
p.machines[inst.Id()] = m.Id()
log.Noticef("worker/provisioner: started machine %s as instance %s", m, inst.Id())
return nil
}
func (task *provisionerTask) startMachine(machine *state.Machine) error {
stateInfo, apiInfo, err := task.auth.SetupAuthentication(machine)
if err != nil {
logger.Errorf("failed to setup authentication: %v", err)
return err
}
cons, err := machine.Constraints()
if err != nil {
return err
}
// Generate a unique nonce for the new instance.
uuid, err := utils.NewUUID()
if err != nil {
return err
}
// Generated nonce has the format: "machine-#:UUID". The first
// part is a badge, specifying the tag of the machine the provisioner
// is running on, while the second part is a random UUID.
nonce := fmt.Sprintf("%s:%s", names.MachineTag(task.machineId), uuid.String())
inst, metadata, err := task.broker.StartInstance(machine.Id(), nonce, machine.Series(), cons, stateInfo, apiInfo)
if err != nil {
// Set the state to error, so the machine will be skipped next
// time until the error is resolved, but don't return an
// error; just keep going with the other machines.
logger.Errorf("cannot start instance for machine %q: %v", machine, err)
if err1 := machine.SetStatus(params.StatusError, err.Error()); err1 != nil {
// Something is wrong with this machine, better report it back.
logger.Errorf("cannot set error status for machine %q: %v", machine, err1)
return err1
}
return nil
}
if err := machine.SetProvisioned(inst.Id(), nonce, metadata); err != nil {
logger.Errorf("cannot register instance for machine %v: %v", machine, err)
// The machine is started, but we can't record the mapping in
// state. It'll keep running while we fail out and restart,
// but will then be detected by findUnknownInstances and
// killed again.
//
// TODO(dimitern) Stop the instance right away here.
//
// Multiple instantiations of a given machine (with the same
// machine ID) cannot coexist, because findUnknownInstances is
// called before startMachines. However, if the first machine
// had started to do work before being replaced, we may
// encounter surprising problems.
return err
}
logger.Infof("started machine %s as instance %s with hardware %q", machine, inst.Id(), metadata)
return nil
}
// NewLock returns a new lock with the given name within the given lock
// directory, without acquiring it. The lock name must match the regular
// expression defined by NameRegexp.
func NewLock(lockDir, name string) (*Lock, error) {
if !validName.MatchString(name) {
return nil, fmt.Errorf("Invalid lock name %q. Names must match %q", name, NameRegexp)
}
nonce, err := utils.NewUUID()
if err != nil {
return nil, err
}
lock := &Lock{
name: name,
parent: lockDir,
nonce: nonce[:],
}
// Ensure the parent exists.
if err := os.MkdirAll(lock.parent, 0755); err != nil {
return nil, err
}
return lock, nil
}
// Initialize sets up an initial empty state and returns it.
// This needs to be performed only once for a given environment.
// It returns unauthorizedError if access is unauthorized.
func Initialize(info *Info, cfg *config.Config, opts DialOpts) (rst *State, err error) {
st, err := Open(info, opts)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
st.Close()
}
}()
// A valid environment is used as a signal that the
// state has already been initalized. If this is the case
// do nothing.
if _, err := st.Environment(); err == nil {
return st, nil
} else if !errors.IsNotFoundError(err) {
return nil, err
}
log.Infof("state: initializing environment")
if err := checkEnvironConfig(cfg); err != nil {
return nil, err
}
uuid, err := utils.NewUUID()
if err != nil {
return nil, fmt.Errorf("environment UUID cannot be created: %v", err)
}
ops := []txn.Op{
createConstraintsOp(st, environGlobalKey, constraints.Value{}),
createSettingsOp(st, environGlobalKey, cfg.AllAttrs()),
createEnvironmentOp(st, cfg.Name(), uuid.String()),
}
if err := st.runTransaction(ops); err == txn.ErrAborted {
// The config was created in the meantime.
return st, nil
} else if err != nil {
return nil, err
}
return st, nil
}
func (s *InterfaceSuite) GetContext(c *C, relId int,
remoteName string) jujuc.Context {
uuid, err := utils.NewUUID()
c.Assert(err, IsNil)
return s.HookContextSuite.GetHookContext(c, uuid.String(), relId, remoteName)
}
func (s *RunHookSuite) TestRunHookRelationFlushing(c *C) {
// Create a charm with a breaking hook.
uuid, err := utils.NewUUID()
c.Assert(err, IsNil)
ctx := s.GetHookContext(c, uuid.String(), -1, "")
charmDir, _ := makeCharm(c, hookSpec{
name: "something-happened",
perm: 0700,
code: 123,
})
// Mess with multiple relation settings.
node0, err := s.relctxs[0].Settings()
node0.Set("foo", 1)
node1, err := s.relctxs[1].Settings()
node1.Set("bar", 2)
// Run the failing hook.
err = ctx.RunHook("something-happened", charmDir, c.MkDir(), "/path/to/socket")
c.Assert(err, ErrorMatches, "exit status 123")
// Check that the changes to the local settings nodes have been discarded.
node0, err = s.relctxs[0].Settings()
c.Assert(err, IsNil)
c.Assert(node0.Map(), DeepEquals, map[string]interface{}{"relation-name": "db0"})
node1, err = s.relctxs[1].Settings()
c.Assert(err, IsNil)
c.Assert(node1.Map(), DeepEquals, map[string]interface{}{"relation-name": "db1"})
// Check that the changes have been written to state.
settings0, err := s.relunits[0].ReadSettings("u/0")
c.Assert(err, IsNil)
c.Assert(settings0, DeepEquals, node0.Map())
settings1, err := s.relunits[1].ReadSettings("u/0")
c.Assert(err, IsNil)
c.Assert(settings1, DeepEquals, node1.Map())
// Create a charm with a working hook, and mess with settings again.
charmDir, _ = makeCharm(c, hookSpec{
name: "something-happened",
perm: 0700,
})
node0.Set("baz", 3)
node1.Set("qux", 4)
// Run the hook.
err = ctx.RunHook("something-happened", charmDir, c.MkDir(), "/path/to/socket")
c.Assert(err, IsNil)
// Check that the changes to the local settings nodes are still there.
node0, err = s.relctxs[0].Settings()
c.Assert(err, IsNil)
c.Assert(node0.Map(), DeepEquals, map[string]interface{}{
"relation-name": "db0",
"baz": 3,
})
node1, err = s.relctxs[1].Settings()
c.Assert(err, IsNil)
c.Assert(node1.Map(), DeepEquals, map[string]interface{}{
"relation-name": "db1",
"qux": 4,
})
// Check that the changes have been written to state.
settings0, err = s.relunits[0].ReadSettings("u/0")
c.Assert(err, IsNil)
c.Assert(settings0, DeepEquals, node0.Map())
settings1, err = s.relunits[1].ReadSettings("u/0")
c.Assert(err, IsNil)
c.Assert(settings1, DeepEquals, node1.Map())
}