func (s *relationsSuite) TestNextOpNothing(c *gc.C) {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
var numCalls int32
unitEntity := params.Entities{Entities: []params.Entity{params.Entity{Tag: "unit-wordpress-0"}}}
apiCaller := mockAPICaller(c, &numCalls,
uniterApiCall("Life", unitEntity, params.LifeResults{Results: []params.LifeResult{{Life: params.Alive}}}, nil),
uniterApiCall("JoinedRelations", unitEntity, params.StringsResults{Results: []params.StringsResult{{Result: []string{}}}}, nil),
uniterApiCall("GetPrincipal", unitEntity, params.StringBoolResults{Results: []params.StringBoolResult{{Result: "", Ok: false}}}, nil),
)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, &numCalls, 2)
localState := resolver.LocalState{
State: operation.State{
Kind: operation.Continue,
},
}
remoteState := remotestate.Snapshot{}
relationsResolver := relation.NewRelationsResolver(r)
_, err = relationsResolver.NextOp(localState, remoteState, &mockOperations{})
c.Assert(errors.Cause(err), gc.Equals, resolver.ErrNoOperation)
}
func (s *relationsSuite) TestImplicitRelationNoHooks(c *gc.C) {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
unitEntity := params.Entities{Entities: []params.Entity{params.Entity{Tag: "unit-wordpress-0"}}}
relationResults := params.RelationResults{
Results: []params.RelationResult{
{
Id: 1,
Key: "wordpress:juju-info juju-info:juju-info",
Life: params.Alive,
Endpoint: multiwatcher.Endpoint{
ApplicationName: "wordpress",
Relation: multiwatcher.CharmRelation{Name: "juju-info", Role: string(charm.RoleProvider), Interface: "juju-info", Scope: "global"},
}},
},
}
relationUnits := params.RelationUnits{RelationUnits: []params.RelationUnit{
{Relation: "relation-wordpress.juju-info#juju-info.juju-info", Unit: "unit-wordpress-0"},
}}
apiCalls := []apiCall{
uniterApiCall("Life", unitEntity, params.LifeResults{Results: []params.LifeResult{{Life: params.Alive}}}, nil),
uniterApiCall("JoinedRelations", unitEntity, params.StringsResults{Results: []params.StringsResult{{Result: []string{}}}}, nil),
uniterApiCall("RelationById", params.RelationIds{RelationIds: []int{1}}, relationResults, nil),
uniterApiCall("Relation", relationUnits, relationResults, nil),
uniterApiCall("Relation", relationUnits, relationResults, nil),
uniterApiCall("Watch", unitEntity, params.NotifyWatchResults{Results: []params.NotifyWatchResult{{NotifyWatcherId: "1"}}}, nil),
uniterApiCall("EnterScope", relationUnits, params.ErrorResults{Results: []params.ErrorResult{{}}}, nil),
uniterApiCall("GetPrincipal", unitEntity, params.StringBoolResults{Results: []params.StringBoolResult{{Result: "", Ok: false}}}, nil),
}
var numCalls int32
apiCaller := mockAPICaller(c, &numCalls, apiCalls...)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
localState := resolver.LocalState{
State: operation.State{
Kind: operation.Continue,
},
}
remoteState := remotestate.Snapshot{
Relations: map[int]remotestate.RelationSnapshot{
1: remotestate.RelationSnapshot{
Life: params.Alive,
Members: map[string]int64{
"wordpress": 1,
},
},
},
}
relationsResolver := relation.NewRelationsResolver(r)
_, err = relationsResolver.NextOp(localState, remoteState, &mockOperations{})
c.Assert(errors.Cause(err), gc.Equals, resolver.ErrNoOperation)
}
func (s *relationsSuite) setupRelations(c *gc.C) relation.Relations {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
var numCalls int32
unitEntity := params.Entities{Entities: []params.Entity{params.Entity{Tag: "unit-wordpress-0"}}}
apiCaller := mockAPICaller(c, &numCalls,
uniterApiCall("Life", unitEntity, params.LifeResults{Results: []params.LifeResult{{Life: params.Alive}}}, nil),
uniterApiCall("JoinedRelations", unitEntity, params.StringsResults{Results: []params.StringsResult{{Result: []string{}}}}, nil),
)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, &numCalls, 2)
return r
}
func (s *relationsSuite) TestNewRelationsWithExistingRelations(c *gc.C) {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
var numCalls int32
unitEntity := params.Entities{Entities: []params.Entity{params.Entity{Tag: "unit-wordpress-0"}}}
relationUnits := params.RelationUnits{RelationUnits: []params.RelationUnit{
{Relation: "relation-wordpress.db#mysql.db", Unit: "unit-wordpress-0"},
}}
relationResults := params.RelationResults{
Results: []params.RelationResult{
{
Id: 1,
Key: "wordpress:db mysql:db",
Life: params.Alive,
Endpoint: multiwatcher.Endpoint{
ApplicationName: "wordpress",
Relation: multiwatcher.CharmRelation{Name: "mysql", Role: string(charm.RoleProvider), Interface: "db"},
}},
},
}
apiCaller := mockAPICaller(c, &numCalls,
uniterApiCall("Life", unitEntity, params.LifeResults{Results: []params.LifeResult{{Life: params.Alive}}}, nil),
uniterApiCall("JoinedRelations", unitEntity, params.StringsResults{Results: []params.StringsResult{{Result: []string{"relation-wordpress:db mysql:db"}}}}, nil),
uniterApiCall("Relation", relationUnits, relationResults, nil),
uniterApiCall("Relation", relationUnits, relationResults, nil),
uniterApiCall("Watch", unitEntity, params.NotifyWatchResults{Results: []params.NotifyWatchResult{{NotifyWatcherId: "1"}}}, nil),
uniterApiCall("EnterScope", relationUnits, params.ErrorResults{Results: []params.ErrorResult{{}}}, nil),
)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, &numCalls, 6)
info := r.GetInfo()
c.Assert(info, gc.HasLen, 1)
oneInfo := info[1]
c.Assert(oneInfo.RelationUnit.Relation().Tag(), gc.Equals, names.NewRelationTag("wordpress:db mysql:db"))
c.Assert(oneInfo.RelationUnit.Endpoint(), jc.DeepEquals, uniter.Endpoint{
Relation: charm.Relation{Name: "mysql", Role: "provider", Interface: "db", Optional: false, Limit: 0, Scope: ""},
})
c.Assert(oneInfo.MemberNames, gc.HasLen, 0)
}
func (s *relationsSuite) assertHookRelationJoined(c *gc.C, numCalls *int32, apiCalls ...apiCall) relation.Relations {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
apiCaller := mockAPICaller(c, numCalls, apiCalls...)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, numCalls, 2)
localState := resolver.LocalState{
State: operation.State{
Kind: operation.Continue,
},
}
remoteState := remotestate.Snapshot{
Relations: map[int]remotestate.RelationSnapshot{
1: remotestate.RelationSnapshot{
Life: params.Alive,
Members: map[string]int64{
"wordpress": 1,
},
},
},
}
relationsResolver := relation.NewRelationsResolver(r)
op, err := relationsResolver.NextOp(localState, remoteState, &mockOperations{})
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, numCalls, 8)
c.Assert(op.String(), gc.Equals, "run hook relation-joined on unit with relation 1")
// Commit the operation so we save local state for any next operation.
_, err = r.PrepareHook(op.(*mockOperation).hookInfo)
c.Assert(err, jc.ErrorIsNil)
err = r.CommitHook(op.(*mockOperation).hookInfo)
c.Assert(err, jc.ErrorIsNil)
return r
}
func (u *Uniter) init(unitTag names.UnitTag) (err error) {
u.unit, err = u.st.Unit(unitTag)
if err != nil {
return err
}
if u.unit.Life() == params.Dead {
// If we started up already dead, we should not progress further. If we
// become Dead immediately after starting up, we may well complete any
// operations in progress before detecting it; but that race is fundamental
// and inescapable, whereas this one is not.
return worker.ErrTerminateAgent
}
if err = u.setupLocks(); err != nil {
return err
}
if err := jujuc.EnsureSymlinks(u.paths.ToolsDir); err != nil {
return err
}
if err := os.MkdirAll(u.paths.State.RelationsDir, 0755); err != nil {
return errors.Trace(err)
}
relations, err := relation.NewRelations(
u.st, unitTag, u.paths.State.CharmDir,
u.paths.State.RelationsDir, u.catacomb.Dying(),
)
if err != nil {
return errors.Annotatef(err, "cannot create relations")
}
u.relations = relations
storageAttachments, err := storage.NewAttachments(
u.st, unitTag, u.paths.State.StorageDir, u.catacomb.Dying(),
)
if err != nil {
return errors.Annotatef(err, "cannot create storage hook source")
}
u.storage = storageAttachments
u.commands = runcommands.NewCommands()
u.commandChannel = make(chan string)
deployer, err := charm.NewDeployer(
u.paths.State.CharmDir,
u.paths.State.DeployerDir,
charm.NewBundlesDir(u.paths.State.BundlesDir, u.downloader),
)
if err != nil {
return errors.Annotatef(err, "cannot create deployer")
}
u.deployer = &deployerProxy{deployer}
contextFactory, err := context.NewContextFactory(
u.st, unitTag, u.leadershipTracker, u.relations.GetInfo, u.storage, u.paths, u.clock,
)
if err != nil {
return err
}
runnerFactory, err := runner.NewFactory(
u.st, u.paths, contextFactory,
)
if err != nil {
return errors.Trace(err)
}
u.operationFactory = operation.NewFactory(operation.FactoryParams{
Deployer: u.deployer,
RunnerFactory: runnerFactory,
Callbacks: &operationCallbacks{u},
Abort: u.catacomb.Dying(),
MetricSpoolDir: u.paths.GetMetricsSpoolDir(),
})
operationExecutor, err := u.newOperationExecutor(u.paths.State.OperationsFile, u.getServiceCharmURL, u.acquireExecutionLock)
if err != nil {
return errors.Trace(err)
}
u.operationExecutor = operationExecutor
logger.Debugf("starting juju-run listener on unix:%s", u.paths.Runtime.JujuRunSocket)
commandRunner, err := NewChannelCommandRunner(ChannelCommandRunnerConfig{
Abort: u.catacomb.Dying(),
Commands: u.commands,
CommandChannel: u.commandChannel,
})
if err != nil {
return errors.Annotate(err, "creating command runner")
}
u.runListener, err = NewRunListener(RunListenerConfig{
SocketPath: u.paths.Runtime.JujuRunSocket,
CommandRunner: commandRunner,
})
if err != nil {
return errors.Trace(err)
}
rlw := newRunListenerWrapper(u.runListener)
if err := u.catacomb.Add(rlw); err != nil {
return errors.Trace(err)
}
// The socket needs to have permissions 777 in order for other users to use it.
if jujuos.HostOS() != jujuos.Windows {
return os.Chmod(u.paths.Runtime.JujuRunSocket, 0777)
}
return nil
}
func (u *Uniter) init(unitTag names.UnitTag) (err error) {
u.unit, err = u.st.Unit(unitTag)
if err != nil {
return err
}
if u.unit.Life() == params.Dead {
// If we started up already dead, we should not progress further. If we
// become Dead immediately after starting up, we may well complete any
// operations in progress before detecting it; but that race is fundamental
// and inescapable, whereas this one is not.
return worker.ErrTerminateAgent
}
// If initialising for the first time after deploying, update the status.
currentStatus, err := u.unit.UnitStatus()
if err != nil {
return err
}
// TODO(fwereade/wallyworld): we should have an explicit place in the model
// to tell us when we've hit this point, instead of piggybacking on top of
// status and/or status history.
// If the previous status was waiting for machine, we transition to the next step.
if currentStatus.Status == string(status.Waiting) &&
(currentStatus.Info == status.MessageWaitForMachine || currentStatus.Info == status.MessageInstallingAgent) {
if err := u.unit.SetUnitStatus(status.Waiting, status.MessageInitializingAgent, nil); err != nil {
return errors.Trace(err)
}
}
if err := jujuc.EnsureSymlinks(u.paths.ToolsDir); err != nil {
return err
}
if err := os.MkdirAll(u.paths.State.RelationsDir, 0755); err != nil {
return errors.Trace(err)
}
relations, err := relation.NewRelations(
u.st, unitTag, u.paths.State.CharmDir,
u.paths.State.RelationsDir, u.catacomb.Dying(),
)
if err != nil {
return errors.Annotatef(err, "cannot create relations")
}
u.relations = relations
storageAttachments, err := storage.NewAttachments(
u.st, unitTag, u.paths.State.StorageDir, u.catacomb.Dying(),
)
if err != nil {
return errors.Annotatef(err, "cannot create storage hook source")
}
u.storage = storageAttachments
u.commands = runcommands.NewCommands()
u.commandChannel = make(chan string)
deployer, err := charm.NewDeployer(
u.paths.State.CharmDir,
u.paths.State.DeployerDir,
charm.NewBundlesDir(u.paths.State.BundlesDir, u.downloader),
)
if err != nil {
return errors.Annotatef(err, "cannot create deployer")
}
contextFactory, err := context.NewContextFactory(
u.st, unitTag, u.leadershipTracker, u.relations.GetInfo, u.storage, u.paths, u.clock,
)
if err != nil {
return err
}
runnerFactory, err := runner.NewFactory(
u.st, u.paths, contextFactory,
)
if err != nil {
return errors.Trace(err)
}
u.operationFactory = operation.NewFactory(operation.FactoryParams{
Deployer: deployer,
RunnerFactory: runnerFactory,
Callbacks: &operationCallbacks{u},
Abort: u.catacomb.Dying(),
MetricSpoolDir: u.paths.GetMetricsSpoolDir(),
})
operationExecutor, err := u.newOperationExecutor(u.paths.State.OperationsFile, u.getServiceCharmURL, u.acquireExecutionLock)
if err != nil {
return errors.Trace(err)
}
u.operationExecutor = operationExecutor
logger.Debugf("starting juju-run listener on unix:%s", u.paths.Runtime.JujuRunSocket)
commandRunner, err := NewChannelCommandRunner(ChannelCommandRunnerConfig{
Abort: u.catacomb.Dying(),
Commands: u.commands,
CommandChannel: u.commandChannel,
})
if err != nil {
return errors.Annotate(err, "creating command runner")
}
u.runListener, err = NewRunListener(RunListenerConfig{
SocketPath: u.paths.Runtime.JujuRunSocket,
CommandRunner: commandRunner,
})
if err != nil {
return errors.Trace(err)
}
rlw := newRunListenerWrapper(u.runListener)
if err := u.catacomb.Add(rlw); err != nil {
return errors.Trace(err)
}
// The socket needs to have permissions 777 in order for other users to use it.
if jujuos.HostOS() != jujuos.Windows {
return os.Chmod(u.paths.Runtime.JujuRunSocket, 0777)
}
return nil
}