github.com/cloudbase/juju-core@v0.0.0-20140504232958-a7271ac7912f/state/apiserver/server_test.go

// Copyright 2012, 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package apiserver_test

import (
	"io"
	stdtesting "testing"
	"time"

	gc "launchpad.net/gocheck"

	jujutesting "launchpad.net/juju-core/juju/testing"
	"launchpad.net/juju-core/rpc"
	"launchpad.net/juju-core/state"
	"launchpad.net/juju-core/state/api"
	"launchpad.net/juju-core/state/api/params"
	"launchpad.net/juju-core/state/apiserver"
	coretesting "launchpad.net/juju-core/testing"
	jc "launchpad.net/juju-core/testing/checkers"
	"launchpad.net/juju-core/utils"
)

func TestAll(t *stdtesting.T) {
	coretesting.MgoTestPackage(t)
}

var fastDialOpts = api.DialOpts{}

type serverSuite struct {
	jujutesting.JujuConnSuite
}

var _ = gc.Suite(&serverSuite{})

func (s *serverSuite) TestStop(c *gc.C) {
	// Start our own instance of the server so we have
	// a handle on it to stop it.
	srv, err := apiserver.NewServer(s.State, "localhost:0", []byte(coretesting.ServerCert), []byte(coretesting.ServerKey), "")
	c.Assert(err, gc.IsNil)
	defer srv.Stop()

	stm, err := s.State.AddMachine("quantal", state.JobHostUnits)
	c.Assert(err, gc.IsNil)
	err = stm.SetProvisioned("foo", "fake_nonce", nil)
	c.Assert(err, gc.IsNil)
	password, err := utils.RandomPassword()
	c.Assert(err, gc.IsNil)
	err = stm.SetPassword(password)
	c.Assert(err, gc.IsNil)

	// Note we can't use openAs because we're not connecting to
	// s.APIConn.
	apiInfo := &api.Info{
		Tag:      stm.Tag(),
		Password: password,
		Nonce:    "fake_nonce",
		Addrs:    []string{srv.Addr()},
		CACert:   []byte(coretesting.CACert),
	}
	st, err := api.Open(apiInfo, fastDialOpts)
	c.Assert(err, gc.IsNil)
	defer st.Close()

	_, err = st.Machiner().Machine(stm.Tag())
	c.Assert(err, gc.IsNil)

	err = srv.Stop()
	c.Assert(err, gc.IsNil)

	_, err = st.Machiner().Machine(stm.Tag())
	// The client has not necessarily seen the server shutdown yet,
	// so there are two possible errors.
	if err != rpc.ErrShutdown && err != io.ErrUnexpectedEOF {
		c.Fatalf("unexpected error from request: %v", err)
	}

	// Check it can be stopped twice.
	err = srv.Stop()
	c.Assert(err, gc.IsNil)
}

func (s *serverSuite) TestOpenAsMachineErrors(c *gc.C) {
	assertNotProvisioned := func(err error) {
		c.Assert(err, gc.NotNil)
		c.Assert(err, jc.Satisfies, params.IsCodeNotProvisioned)
		c.Assert(err, gc.ErrorMatches, `machine \d+ is not provisioned`)
	}
	stm, err := s.State.AddMachine("quantal", state.JobHostUnits)
	c.Assert(err, gc.IsNil)
	err = stm.SetProvisioned("foo", "fake_nonce", nil)
	c.Assert(err, gc.IsNil)
	password, err := utils.RandomPassword()
	c.Assert(err, gc.IsNil)
	err = stm.SetPassword(password)
	c.Assert(err, gc.IsNil)

	// This does almost exactly the same as OpenAPIAsMachine but checks
	// for failures instead.
	_, info, err := s.APIConn.Environ.StateInfo()
	info.Tag = stm.Tag()
	info.Password = password
	info.Nonce = "invalid-nonce"
	st, err := api.Open(info, fastDialOpts)
	assertNotProvisioned(err)
	c.Assert(st, gc.IsNil)

	// Try with empty nonce as well.
	info.Nonce = ""
	st, err = api.Open(info, fastDialOpts)
	assertNotProvisioned(err)
	c.Assert(st, gc.IsNil)

	// Finally, with the correct one succeeds.
	info.Nonce = "fake_nonce"
	st, err = api.Open(info, fastDialOpts)
	c.Assert(err, gc.IsNil)
	c.Assert(st, gc.NotNil)
	st.Close()

	// Now add another machine, intentionally unprovisioned.
	stm1, err := s.State.AddMachine("quantal", state.JobHostUnits)
	c.Assert(err, gc.IsNil)
	err = stm1.SetPassword(password)
	c.Assert(err, gc.IsNil)

	// Try connecting, it will fail.
	info.Tag = stm1.Tag()
	info.Nonce = ""
	st, err = api.Open(info, fastDialOpts)
	assertNotProvisioned(err)
	c.Assert(st, gc.IsNil)
}

func (s *serverSuite) TestMachineLoginStartsPinger(c *gc.C) {
	// This is the same steps as OpenAPIAsNewMachine but we need to assert
	// the agent is not alive before we actually open the API.
	// Create a new machine to verify "agent alive" behavior.
	machine, err := s.State.AddMachine("quantal", state.JobHostUnits)
	c.Assert(err, gc.IsNil)
	err = machine.SetProvisioned("foo", "fake_nonce", nil)
	c.Assert(err, gc.IsNil)
	password, err := utils.RandomPassword()
	c.Assert(err, gc.IsNil)
	err = machine.SetPassword(password)
	c.Assert(err, gc.IsNil)

	// Not alive yet.
	s.assertAlive(c, machine, false)

	// Login as the machine agent of the created machine.
	st := s.OpenAPIAsMachine(c, machine.Tag(), password, "fake_nonce")

	// Make sure the pinger has started.
	s.assertAlive(c, machine, true)

	// Now make sure it stops when connection is closed.
	c.Assert(st.Close(), gc.IsNil)

	// Sync, then wait for a bit to make sure the state is updated.
	s.State.StartSync()
	<-time.After(coretesting.ShortWait)
	s.State.StartSync()

	s.assertAlive(c, machine, false)
}

func (s *serverSuite) TestUnitLoginStartsPinger(c *gc.C) {
	// Create a new service and unit to verify "agent alive" behavior.
	service := s.AddTestingService(c, "wordpress", s.AddTestingCharm(c, "wordpress"))
	unit, err := service.AddUnit()
	c.Assert(err, gc.IsNil)
	password, err := utils.RandomPassword()
	c.Assert(err, gc.IsNil)
	err = unit.SetPassword(password)
	c.Assert(err, gc.IsNil)

	// Not alive yet.
	s.assertAlive(c, unit, false)

	// Login as the unit agent of the created unit.
	st := s.OpenAPIAs(c, unit.Tag(), password)

	// Make sure the pinger has started.
	s.assertAlive(c, unit, true)

	// Now make sure it stops when connection is closed.
	c.Assert(st.Close(), gc.IsNil)

	// Sync, then wait for a bit to make sure the state is updated.
	s.State.StartSync()
	<-time.After(coretesting.ShortWait)
	s.State.StartSync()

	s.assertAlive(c, unit, false)
}

type agentAliver interface {
	AgentAlive() (bool, error)
}

func (s *serverSuite) assertAlive(c *gc.C, entity agentAliver, isAlive bool) {
	s.State.StartSync()
	alive, err := entity.AgentAlive()
	c.Assert(err, gc.IsNil)
	c.Assert(alive, gc.Equals, isAlive)
}