mongo stuff to agent/mongod, add EnsureMongoServer

provider/local/prereqs.go

 // Copyright 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package local
 
 import (
         "errors"
         "fmt"
         "os/exec"
         "regexp"
         "runtime"
 
+        "launchpad.net/juju-core/agent/mongo"
         "launchpad.net/juju-core/container/kvm"
         "launchpad.net/juju-core/instance"
-        "launchpad.net/juju-core/upstart"
         "launchpad.net/juju-core/utils"
         "launchpad.net/juju-core/version"
 )
 
 var notLinuxError = errors.New("The local provider is currently only available for Linux")
 
 const installMongodUbuntu = "MongoDB server must be installed to enable the local provider:"
 const aptAddRepositoryJujuStable = `
     sudo apt-add-repository ppa:juju/stable   # required for MongoDB SSL support
     sudo apt-get update`
@@ skipping 50 matching lines @@
         switch containerType {
         case instance.LXC:
                 return verifyLxc()
         case instance.KVM:
                 return kvm.VerifyKVMEnabled()
         }
         return fmt.Errorf("Unknown container type specified in the config.")
 }
 
 func verifyMongod() error {
-        path := upstart.MongodPath()
+        path := mongo.MongodPath()
 
         ver, err := mongodVersion(path)
         if err != nil {
                 return err
         }
         if ver.Compare(lowestMongoVersion) < 0 {
                 return fmt.Errorf("installed version of mongod (%v) is not supported by Juju. "+
                         "Juju requires version %v or greater.",
                         ver,
                         lowestMongoVersion)
@@ skipping 40 matching lines @@
         }
         return fmt.Errorf("%v\n%s", err, installMongodGeneric)
 }
 
 func wrapLxcNotFound(err error) error {
         if utils.IsUbuntu() {
                 return fmt.Errorf("%v\n%s", err, installLxcUbuntu)
         }
         return fmt.Errorf("%v\n%s", err, installLxcGeneric)
 }