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// Copyright 2012, 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package deployer_test
import (
"sort"
"strings"
stdtesting "testing"
"time"
. "launchpad.net/gocheck"
"launchpad.net/juju-core/errors"
jujutesting "launchpad.net/juju-core/juju/testing"
"launchpad.net/juju-core/names"
"launchpad.net/juju-core/state"
"launchpad.net/juju-core/state/api"
apideployer "launchpad.net/juju-core/state/api/deployer"
"launchpad.net/juju-core/state/api/params"
coretesting "launchpad.net/juju-core/testing"
"launchpad.net/juju-core/worker/deployer"
)
func TestPackage(t *stdtesting.T) {
coretesting.MgoTestPackage(t)
}
type DeployerSuite struct {
jujutesting.JujuConnSuite
SimpleToolsFixture
machine *state.Machine
stateAPI *api.State
deployerState *apideployer.State
}
var _ = Suite(&DeployerSuite{})
func (s *DeployerSuite) SetUpTest(c *C) {
s.JujuConnSuite.SetUpTest(c)
s.SimpleToolsFixture.SetUp(c, s.DataDir())
// Create a machine to work with.
var err error
s.machine, err = s.State.AddMachine("series", state.JobHostUnits)
c.Assert(err, IsNil)
err = s.machine.SetProvisioned("foo", "fake_nonce", nil)
c.Assert(err, IsNil)
err = s.machine.SetPassword("test-password")
c.Assert(err, IsNil)
// Log in as the machine agent of the created machine.
s.stateAPI = s.OpenAPIAsMachine(c, s.machine.Tag(), "test-password", "fake_nonce")
c.Assert(s.stateAPI, NotNil)
// Create the deployer facade.
s.deployerState = s.stateAPI.Deployer()
c.Assert(s.deployerState, NotNil)
}
func (s *DeployerSuite) TearDownTest(c *C) {
if s.stateAPI != nil {
err := s.stateAPI.Close()
c.Check(err, IsNil)
}
s.SimpleToolsFixture.TearDown(c)
s.JujuConnSuite.TearDownTest(c)
}
var _ = (*deployer.Deployer)(nil)
func (s *DeployerSuite) TestDeployRecallRemovePrincipals(c *C) {
// Create a machine, and a couple of units.
svc, err := s.State.AddService("wordpress", s.AddTestingCharm(c, "wordpress"))
c.Assert(err, IsNil)
u0, err := svc.AddUnit()
c.Assert(err, IsNil)
u1, err := svc.AddUnit()
c.Assert(err, IsNil)
// Create a deployer acting on behalf of the machine.
ctx := s.getContext(c)
dep := deployer.NewDeployer(s.deployerState, ctx, s.machine.Tag())
defer stop(c, dep)
// Assign one unit, and wait for it to be deployed.
err = u0.AssignToMachine(s.machine)
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx, u0.Name()))
// Assign another unit, and wait for that to be deployed.
err = u1.AssignToMachine(s.machine)
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx, u0.Name(), u1.Name()))
// Cause a unit to become Dying, and check no change.
err = u1.SetStatus(params.StatusInstalled, "")
c.Assert(err, IsNil)
err = u1.Destroy()
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx, u0.Name(), u1.Name()))
// Cause a unit to become Dead, and check that it is both recalled and
// removed from state.
err = u0.EnsureDead()
c.Assert(err, IsNil)
s.waitFor(c, isRemoved(s.State, u0.Name()))
s.waitFor(c, isDeployed(ctx, u1.Name()))
// Remove the Dying unit from the machine, and check that it is recalled...
err = u1.UnassignFromMachine()
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx))
// ...and that the deployer, no longer bearing any responsibility for the
// Dying unit, does nothing further to it.
err = u1.Refresh()
c.Assert(err, IsNil)
c.Assert(u1.Life(), Equals, state.Dying)
}
func (s *DeployerSuite) TestRemoveNonAlivePrincipals(c *C) {
// Create a service, and a couple of units.
svc, err := s.State.AddService("wordpress", s.AddTestingCharm(c, "wordpress"))
c.Assert(err, IsNil)
u0, err := svc.AddUnit()
c.Assert(err, IsNil)
u1, err := svc.AddUnit()
c.Assert(err, IsNil)
// Assign the units to the machine, and set them to Dying/Dead.
err = u0.AssignToMachine(s.machine)
c.Assert(err, IsNil)
err = u0.EnsureDead()
c.Assert(err, IsNil)
err = u1.AssignToMachine(s.machine)
c.Assert(err, IsNil)
// note: this is not a sane state; for the unit to have a status it must
// have been deployed. But it's instructive to check that the right thing
// would happen if it were possible to have a dying unit in this situation.
err = u1.SetStatus(params.StatusInstalled, "")
c.Assert(err, IsNil)
err = u1.Destroy()
c.Assert(err, IsNil)
// When the deployer is started, in each case (1) no unit agent is deployed
// and (2) the non-Alive unit is been removed from state.
ctx := s.getContext(c)
dep := deployer.NewDeployer(s.deployerState, ctx, s.machine.Tag())
defer stop(c, dep)
s.waitFor(c, isRemoved(s.State, u0.Name()))
s.waitFor(c, isRemoved(s.State, u1.Name()))
s.waitFor(c, isDeployed(ctx))
}
func (s *DeployerSuite) prepareSubordinates(c *C) (*state.Unit, []*state.RelationUnit) {
svc, err := s.State.AddService("wordpress", s.AddTestingCharm(c, "wordpress"))
c.Assert(err, IsNil)
u, err := svc.AddUnit()
c.Assert(err, IsNil)
err = u.AssignToMachine(s.machine)
c.Assert(err, IsNil)
rus := []*state.RelationUnit{}
logging := s.AddTestingCharm(c, "logging")
for _, name := range []string{"subsvc0", "subsvc1"} {
_, err := s.State.AddService(name, logging)
c.Assert(err, IsNil)
eps, err := s.State.InferEndpoints([]string{"wordpress", name})
c.Assert(err, IsNil)
rel, err := s.State.AddRelation(eps...)
c.Assert(err, IsNil)
ru, err := rel.Unit(u)
c.Assert(err, IsNil)
rus = append(rus, ru)
}
return u, rus
}
func (s *DeployerSuite) TestDeployRecallRemoveSubordinates(c *C) {
// Create a deployer acting on behalf of the principal.
u, rus := s.prepareSubordinates(c)
ctx := s.getContext(c)
machineId, err := u.AssignedMachineId()
c.Assert(err, IsNil)
dep := deployer.NewDeployer(s.deployerState, ctx, names.MachineTag(machineId))
defer stop(c, dep)
// Add a subordinate, and wait for it to be deployed.
err = rus[0].EnterScope(nil)
c.Assert(err, IsNil)
sub0, err := s.State.Unit("subsvc0/0")
c.Assert(err, IsNil)
// Make sure the principal is deployed first, then the subordinate
s.waitFor(c, isDeployed(ctx, u.Name(), sub0.Name()))
// And another.
err = rus[1].EnterScope(nil)
c.Assert(err, IsNil)
sub1, err := s.State.Unit("subsvc1/0")
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx, u.Name(), sub0.Name(), sub1.Name()))
// Set one to Dying; check nothing happens.
err = sub1.Destroy()
c.Assert(err, IsNil)
s.State.StartSync()
c.Assert(isRemoved(s.State, sub1.Name())(c), Equals, false)
s.waitFor(c, isDeployed(ctx, u.Name(), sub0.Name(), sub1.Name()))
// Set the other to Dead; check it's recalled and removed.
err = sub0.EnsureDead()
c.Assert(err, IsNil)
s.waitFor(c, isDeployed(ctx, u.Name(), sub1.Name()))
s.waitFor(c, isRemoved(s.State, sub0.Name()))
}
func (s *DeployerSuite) TestNonAliveSubordinates(c *C) {
// Add two subordinate units and set them to Dead/Dying respectively.
u, rus := s.prepareSubordinates(c)
err := rus[0].EnterScope(nil)
c.Assert(err, IsNil)
sub0, err := s.State.Unit("subsvc0/0")
c.Assert(err, IsNil)
err = sub0.EnsureDead()
c.Assert(err, IsNil)
err = rus[1].EnterScope(nil)
c.Assert(err, IsNil)
sub1, err := s.State.Unit("subsvc1/0")
c.Assert(err, IsNil)
err = sub1.Destroy()
c.Assert(err, IsNil)
// When we start a new deployer, neither unit will be deployed and
// both will be removed.
ctx := s.getContext(c)
machineId, err := u.AssignedMachineId()
c.Assert(err, IsNil)
dep := deployer.NewDeployer(s.deployerState, ctx, names.MachineTag(machineId))
defer stop(c, dep)
s.waitFor(c, isRemoved(s.State, sub0.Name()))
s.waitFor(c, isRemoved(s.State, sub1.Name()))
}
func (s *DeployerSuite) waitFor(c *C, t func(c *C) bool) {
s.BackingState.StartSync()
if t(c) {
return
}
timeout := time.After(coretesting.LongWait)
for {
select {
case <-timeout:
c.Fatalf("timeout")
case <-time.After(coretesting.ShortWait):
if t(c) {
return
}
}
}
panic("unreachable")
}
func isDeployed(ctx deployer.Context, expected ...string) func(*C) bool {
return func(c *C) bool {
sort.Strings(expected)
current, err := ctx.DeployedUnits()
c.Assert(err, IsNil)
sort.Strings(current)
return strings.Join(expected, ":") == strings.Join(current, ":")
}
}
func isRemoved(st *state.State, name string) func(*C) bool {
return func(c *C) bool {
_, err := st.Unit(name)
if errors.IsNotFoundError(err) {
return true
}
c.Assert(err, IsNil)
return false
}
}
type stopper interface {
Stop() error
}
func stop(c *C, stopper stopper) {
c.Assert(stopper.Stop(), IsNil)
}
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