Colin Watson has proposed merging 
~cjwatson/launchpad:rename-bfj-behaviour-slave into launchpad:master with 
~cjwatson/launchpad:rename-slave-status as a prerequisite.

Commit message:
Rename "slave" in BuildFarmJobBehaviour to "worker"

Requested reviews:
  Launchpad code reviewers (launchpad-reviewers)

For more details, see:
https://code.launchpad.net/~cjwatson/launchpad/+git/launchpad/+merge/414041
-- 
Your team Launchpad code reviewers is requested to review the proposed merge of 
~cjwatson/launchpad:rename-bfj-behaviour-slave into launchpad:master.
diff --git a/lib/lp/buildmaster/builderproxy.py b/lib/lp/buildmaster/builderproxy.py
index a224adf..a22ca85 100644
--- a/lib/lp/buildmaster/builderproxy.py
+++ b/lib/lp/buildmaster/builderproxy.py
@@ -70,7 +70,7 @@ class BuilderProxyMixin:
         auth_string = '{}:{}'.format(admin_username, secret).strip()
         auth_header = b'Basic ' + base64.b64encode(auth_string.encode('ASCII'))
 
-        token = yield self._slave.process_pool.doWork(
+        token = yield self._worker.process_pool.doWork(
             RequestProxyTokenCommand,
             url=url, auth_header=auth_header,
             proxy_username=proxy_username)
diff --git a/lib/lp/buildmaster/doc/buildfarmjobbehaviour.txt b/lib/lp/buildmaster/doc/buildfarmjobbehaviour.txt
index 0218b5f..26528be 100644
--- a/lib/lp/buildmaster/doc/buildfarmjobbehaviour.txt
+++ b/lib/lp/buildmaster/doc/buildfarmjobbehaviour.txt
@@ -17,7 +17,7 @@ Creating a new behaviour
 
 A new behaviour should implement the `IBuildFarmJobBehaviour` interface
 and extend BuildFarmJobBehaviourBase. A new behaviour will only be required
-to define one method - dispatchBuildToSlave() - to correctly implement
+to define one method - dispatchBuildToWorker() - to correctly implement
 the interface, but will usually want to customise the other properties and
 methods as well.
 
@@ -31,7 +31,7 @@ methods as well.
     ... class MyNewBuildBehaviour(BuildFarmJobBehaviourBase):
     ...     """A custom build behaviour for building blah."""
     ...
-    ...     def dispatchBuildToSlave(self, logger):
+    ...     def dispatchBuildToWorker(self, logger):
     ...         print("Did something special to dispatch MySpecialBuild.")
 
 For this documentation, we'll also need a dummy new build farm job.
diff --git a/lib/lp/buildmaster/interactor.py b/lib/lp/buildmaster/interactor.py
index 4d3e08e..3aaae63 100644
--- a/lib/lp/buildmaster/interactor.py
+++ b/lib/lp/buildmaster/interactor.py
@@ -487,7 +487,7 @@ class BuilderInteractor:
         builder.setCleanStatus(BuilderCleanStatus.DIRTY)
         transaction.commit()
 
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
 
     @classmethod
     @defer.inlineCallbacks
diff --git a/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py b/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
index a3a2416..2d0eed4 100644
--- a/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
+++ b/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
@@ -31,8 +31,8 @@ class IBuildFarmJobBehaviour(Interface):
 
     pocket = Attribute("The `PackagePublishingPocket` to build against.")
 
-    def setBuilder(builder, slave):
-        """Sets the associated builder and slave for this instance."""
+    def setBuilder(builder, worker):
+        """Sets the associated builder and worker for this instance."""
 
     def determineFilesToSend():
         """Work out which files to send to the builder.
@@ -63,7 +63,7 @@ class IBuildFarmJobBehaviour(Interface):
         """
 
     def composeBuildRequest(logger):
-        """Compose parameters for a slave build request.
+        """Compose parameters for a worker build request.
 
         :param logger: A logger to be used to log diagnostic information.
         :return: A tuple of (
@@ -73,8 +73,8 @@ class IBuildFarmJobBehaviour(Interface):
             or a Deferred resulting in the same.
         """
 
-    def dispatchBuildToSlave(logger):
-        """Dispatch a specific build to the slave.
+    def dispatchBuildToWorker(logger):
+        """Dispatch a specific build to the worker.
 
         :param logger: A logger to be used to log diagnostic information.
         """
@@ -89,7 +89,7 @@ class IBuildFarmJobBehaviour(Interface):
         """Check that we are allowed to collect this successful build."""
 
     def handleStatus(bq, status, worker_status):
-        """Update the build from a WAITING slave result.
+        """Update the build from a WAITING worker result.
 
         :param bq: The `BuildQueue` currently being processed.
         :param status: The tail of the BuildStatus (eg. OK or PACKAGEFAIL).
diff --git a/lib/lp/buildmaster/model/buildfarmjobbehaviour.py b/lib/lp/buildmaster/model/buildfarmjobbehaviour.py
index 3ed2e91..0315b52 100644
--- a/lib/lp/buildmaster/model/buildfarmjobbehaviour.py
+++ b/lib/lp/buildmaster/model/buildfarmjobbehaviour.py
@@ -38,7 +38,7 @@ from lp.services.utils import sanitise_urls
 from lp.services.webapp import canonical_url
 
 
-SLAVE_LOG_FILENAME = 'buildlog'
+WORKER_LOG_FILENAME = 'buildlog'
 
 
 class BuildFarmJobBehaviourBase:
@@ -78,10 +78,10 @@ class BuildFarmJobBehaviourBase:
         else:
             return PackagePublishingPocket.RELEASE
 
-    def setBuilder(self, builder, slave):
+    def setBuilder(self, builder, worker):
         """The builder should be set once and not changed."""
         self._builder = builder
-        self._slave = slave
+        self._worker = worker
 
     def determineFilesToSend(self):
         """The default behaviour is to send no files."""
@@ -114,7 +114,7 @@ class BuildFarmJobBehaviourBase:
         pass
 
     @defer.inlineCallbacks
-    def dispatchBuildToSlave(self, logger):
+    def dispatchBuildToWorker(self, logger):
         """See `IBuildFarmJobBehaviour`."""
         cookie = self.build.build_cookie
         logger.info(
@@ -139,11 +139,11 @@ class BuildFarmJobBehaviourBase:
 
         filename_to_sha1 = OrderedDict()
         dl = []
-        dl.append(self._slave.sendFileToWorker(
+        dl.append(self._worker.sendFileToWorker(
             logger=logger, url=chroot.http_url, sha1=chroot.content.sha1))
         for filename, params in files.items():
             filename_to_sha1[filename] = params['sha1']
-            dl.append(self._slave.sendFileToWorker(logger=logger, **params))
+            dl.append(self._worker.sendFileToWorker(logger=logger, **params))
         yield defer.gatherResults(dl)
 
         combined_args = {
@@ -154,7 +154,7 @@ class BuildFarmJobBehaviourBase:
             % (cookie, self.build.title, self._builder.url,
                sanitise_urls(repr(combined_args))))
 
-        (status, info) = yield self._slave.build(
+        (status, info) = yield self._worker.build(
             cookie, builder_type, chroot.content.sha1, filename_to_sha1, args)
 
         # Update stats
@@ -179,11 +179,11 @@ class BuildFarmJobBehaviourBase:
         timestamp = now.strftime("%Y%m%d-%H%M%S")
         return '%s-%s' % (timestamp, build_cookie)
 
-    def transferSlaveFileToLibrarian(self, file_sha1, filename, private):
-        """Transfer a file from the slave to the librarian.
+    def transferWorkerFileToLibrarian(self, file_sha1, filename, private):
+        """Transfer a file from the worker to the librarian.
 
         :param file_sha1: The file's sha1, which is how the file is addressed
-            in the slave XMLRPC protocol. Specially, the file_sha1 'buildlog'
+            in the worker XMLRPC protocol. Specially, the file_sha1 'buildlog'
             will cause the build log to be retrieved and gzipped.
         :param filename: The name of the file to be given to the librarian
             file alias.
@@ -222,7 +222,7 @@ class BuildFarmJobBehaviourBase:
 
             return library_file.id
 
-        d = self._slave.getFile(file_sha1, out_file_name)
+        d = self._worker.getFile(file_sha1, out_file_name)
         d.addCallback(got_file, filename, out_file_name)
         return d
 
@@ -230,16 +230,16 @@ class BuildFarmJobBehaviourBase:
         """Return the preferred file name for this job's log."""
         return 'buildlog.txt'
 
-    def getLogFromSlave(self, queue_item):
+    def getLogFromWorker(self, queue_item):
         """Return a Deferred which fires when the log is in the librarian."""
-        d = self.transferSlaveFileToLibrarian(
-            SLAVE_LOG_FILENAME, self.getLogFileName(), self.build.is_private)
+        d = self.transferWorkerFileToLibrarian(
+            WORKER_LOG_FILENAME, self.getLogFileName(), self.build.is_private)
         return d
 
     @defer.inlineCallbacks
-    def storeLogFromSlave(self, build_queue=None):
+    def storeLogFromWorker(self, build_queue=None):
         """See `IBuildFarmJob`."""
-        lfa_id = yield self.getLogFromSlave(
+        lfa_id = yield self.getLogFromWorker(
             build_queue or self.build.buildqueue_record)
         self.build.setLog(lfa_id)
         transaction.commit()
@@ -284,7 +284,7 @@ class BuildFarmJobBehaviourBase:
                self.build.buildqueue_record.builder.name, status))
         build_status = None
         if status == 'OK':
-            yield self.storeLogFromSlave()
+            yield self.storeLogFromWorker()
             # handleSuccess will sometimes perform write operations
             # outside the database transaction, so a failure between
             # here and the commit can cause duplicated results. For
@@ -294,7 +294,7 @@ class BuildFarmJobBehaviourBase:
         elif status in fail_status_map:
             # XXX wgrant: The builder should be set long before here, but
             # currently isn't.
-            yield self.storeLogFromSlave()
+            yield self.storeLogFromWorker()
             build_status = fail_status_map[status]
         else:
             raise BuildDaemonError(
@@ -320,7 +320,7 @@ class BuildFarmJobBehaviourBase:
         filenames_to_download = []
         for filename, sha1 in filemap.items():
             logger.info("Grabbing file: %s (%s)" % (
-                filename, self._slave.getURL(sha1)))
+                filename, self._worker.getURL(sha1)))
             out_file_name = os.path.join(upload_path, filename)
             # If the evaluated output file name is not within our
             # upload path, then we don't try to copy this or any
@@ -329,7 +329,7 @@ class BuildFarmJobBehaviourBase:
                 raise BuildDaemonError(
                     "Build returned a file named '%s'." % filename)
             filenames_to_download.append((sha1, out_file_name))
-        yield self._slave.getFiles(filenames_to_download, logger=logger)
+        yield self._worker.getFiles(filenames_to_download, logger=logger)
 
     @defer.inlineCallbacks
     def handleSuccess(self, worker_status, logger):
diff --git a/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py b/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
index b3f7d0a..ad05908 100644
--- a/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
+++ b/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
@@ -155,7 +155,7 @@ class TestBuildFarmJobBehaviourBase(TestCaseWithFactory):
         self.assertIs(False, behaviour.extraBuildArgs()["fast_cleanup"])
 
 
-class TestDispatchBuildToSlave(StatsMixin, TestCase):
+class TestDispatchBuildToWorker(StatsMixin, TestCase):
 
     layer = ZopelessLayer
     run_tests_with = AsynchronousDeferredRunTest
@@ -174,8 +174,8 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
              {'some': 'arg', 'archives': ['http://admin:sekrit@blah/']}))
         return behaviour
 
-    def assertDispatched(self, slave, logger, chroot_filename, image_type):
-        # The slave's been asked to cache the chroot and both source
+    def assertDispatched(self, worker, logger, chroot_filename, image_type):
+        # The worker's been asked to cache the chroot and both source
         # files, and then to start the build.
         expected_calls = [
             ('ensurepresent',
@@ -188,7 +188,7 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
              {'archives': ['http://admin:sekrit@blah/'],
               'image_type': image_type,
               'some': 'arg'})]
-        self.assertEqual(expected_calls, slave.call_log)
+        self.assertEqual(expected_calls, worker.call_log)
 
         # And details have been logged, including the build arguments
         # with credentials redacted.
@@ -206,19 +206,19 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
             "http://fake:0000: BuildStatus.BUILDING PACKAGEBUILD-1\n")
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave(self):
+    def test_dispatchBuildToWorker(self):
         behaviour = self.makeBehaviour(FakeDistroArchSeries())
         builder = MockBuilder()
         worker = OkWorker()
         logger = BufferLogger()
         behaviour.setBuilder(builder, worker)
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
 
         self.assertDispatched(
             worker, logger, 'chroot-fooix-bar-y86.tar.gz', 'chroot')
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_with_other_image_available(self):
+    def test_dispatchBuildToWorker_with_other_image_available(self):
         # If a base image is available but isn't in the behaviour's image
         # types, it isn't used.
         das = FakeDistroArchSeries()
@@ -228,13 +228,13 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
         worker = OkWorker()
         logger = BufferLogger()
         behaviour.setBuilder(builder, worker)
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
 
         self.assertDispatched(
             worker, logger, 'chroot-fooix-bar-y86.tar.gz', 'chroot')
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_lxd(self):
+    def test_dispatchBuildToWorker_lxd(self):
         das = FakeDistroArchSeries()
         das.images[BuildBaseImageType.LXD] = 'lxd-fooix-bar-y86.tar.gz'
         behaviour = self.makeBehaviour(das)
@@ -244,13 +244,13 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
         worker = OkWorker()
         logger = BufferLogger()
         behaviour.setBuilder(builder, worker)
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
 
         self.assertDispatched(
             worker, logger, 'lxd-fooix-bar-y86.tar.gz', 'lxd')
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_fallback(self):
+    def test_dispatchBuildToWorker_fallback(self):
         behaviour = self.makeBehaviour(FakeDistroArchSeries())
         behaviour.image_types = [
             BuildBaseImageType.LXD, BuildBaseImageType.CHROOT]
@@ -258,20 +258,20 @@ class TestDispatchBuildToSlave(StatsMixin, TestCase):
         worker = OkWorker()
         logger = BufferLogger()
         behaviour.setBuilder(builder, worker)
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
 
         self.assertDispatched(
             worker, logger, 'chroot-fooix-bar-y86.tar.gz', 'chroot')
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_stats(self):
+    def test_dispatchBuildToWorker_stats(self):
         self.setUpStats()
         behaviour = self.makeBehaviour(FakeDistroArchSeries())
         builder = MockBuilder()
         worker = OkWorker()
         logger = BufferLogger()
         behaviour.setBuilder(builder, worker)
-        yield behaviour.dispatchBuildToSlave(logger)
+        yield behaviour.dispatchBuildToWorker(logger)
         self.assertEqual(1, self.stats_client.incr.call_count)
         self.assertEqual(
             self.stats_client.incr.call_args_list[0][0],
diff --git a/lib/lp/buildmaster/tests/test_interactor.py b/lib/lp/buildmaster/tests/test_interactor.py
index ba5fb6e..fc102be 100644
--- a/lib/lp/buildmaster/tests/test_interactor.py
+++ b/lib/lp/buildmaster/tests/test_interactor.py
@@ -373,7 +373,7 @@ class TestBuilderInteractorDB(TestCaseWithFactory):
         behaviour = BuilderInteractor.getBuildBehaviour(bq, builder, worker)
         self.assertIsInstance(behaviour, BinaryPackageBuildBehaviour)
         self.assertEqual(behaviour._builder, builder)
-        self.assertEqual(behaviour._slave, worker)
+        self.assertEqual(behaviour._worker, worker)
 
     def _setupBuilder(self):
         processor = self.factory.makeProcessor(name="i386")
diff --git a/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py b/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
index e0b5cca..86d645c 100644
--- a/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
+++ b/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
@@ -419,7 +419,7 @@ class TestAsyncCharmRecipeBuildBehaviour(
             yield job.composeBuildRequest(None)
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_prefers_lxd(self):
+    def test_dispatchBuildToWorker_prefers_lxd(self):
         self.pushConfig("builddmaster", builder_proxy_host=None)
         job = self.makeJob()
         builder = MockBuilder()
@@ -432,7 +432,7 @@ class TestAsyncCharmRecipeBuildBehaviour(
         lxd_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             lxd_lfa, image_type=BuildBaseImageType.LXD)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ("ensurepresent", lxd_lfa.http_url, "", ""), worker.call_log[0])
         self.assertEqual(1, self.stats_client.incr.call_count)
@@ -442,7 +442,7 @@ class TestAsyncCharmRecipeBuildBehaviour(
              "job_type=CHARMRECIPEBUILD".format(builder.name),))
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_falls_back_to_chroot(self):
+    def test_dispatchBuildToWorker_falls_back_to_chroot(self):
         self.pushConfig("builddmaster", builder_proxy_host=None)
         job = self.makeJob()
         builder = MockBuilder()
@@ -452,7 +452,7 @@ class TestAsyncCharmRecipeBuildBehaviour(
         chroot_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             chroot_lfa, image_type=BuildBaseImageType.CHROOT)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ("ensurepresent", chroot_lfa.http_url, "", ""), worker.call_log[0])
 
diff --git a/lib/lp/oci/model/ocirecipebuildbehaviour.py b/lib/lp/oci/model/ocirecipebuildbehaviour.py
index 0532204..14cf0ed 100644
--- a/lib/lp/oci/model/ocirecipebuildbehaviour.py
+++ b/lib/lp/oci/model/ocirecipebuildbehaviour.py
@@ -3,7 +3,7 @@
 
 """An `IBuildFarmJobBehaviour` for `OCIRecipeBuild`.
 
-Dispatches OCI image build jobs to build-farm slaves.
+Dispatches OCI image build jobs to build-farm workers.
 """
 
 __all__ = [
@@ -123,7 +123,7 @@ class OCIRecipeBuildBehaviour(BuilderProxyMixin, BuildFarmJobBehaviourBase):
     @defer.inlineCallbacks
     def extraBuildArgs(self, logger=None):
         """
-        Return the extra arguments required by the slave for the given build.
+        Return the extra arguments required by the worker for the given build.
         """
         build = self.build
         args = yield super().extraBuildArgs(logger=logger)
@@ -183,7 +183,7 @@ class OCIRecipeBuildBehaviour(BuilderProxyMixin, BuildFarmJobBehaviourBase):
         file_hash = filemap[name]
         file_path = os.path.join(upload_path, name)
         self._ensureFilePath(name, file_path, upload_path)
-        yield self._slave.getFile(file_hash, file_path)
+        yield self._worker.getFile(file_hash, file_path)
 
         with open(file_path) as file_fp:
             return json.load(file_fp)
@@ -240,7 +240,7 @@ class OCIRecipeBuildBehaviour(BuilderProxyMixin, BuildFarmJobBehaviourBase):
         files_to_download = [
             self._convertToRetrievableFile(upload_path, filename, filemap)
             for filename in files]
-        yield self._slave.getFiles(files_to_download, logger=logger)
+        yield self._worker.getFiles(files_to_download, logger=logger)
 
     def verifySuccessfulBuild(self):
         """See `IBuildFarmJobBehaviour`."""
diff --git a/lib/lp/oci/tests/test_ocirecipebuildbehaviour.py b/lib/lp/oci/tests/test_ocirecipebuildbehaviour.py
index ded5db8..7804583 100644
--- a/lib/lp/oci/tests/test_ocirecipebuildbehaviour.py
+++ b/lib/lp/oci/tests/test_ocirecipebuildbehaviour.py
@@ -585,7 +585,7 @@ class TestAsyncOCIRecipeBuildBehaviour(
             yield job.composeBuildRequest(None)
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_prefers_lxd(self):
+    def test_dispatchBuildToWorker_prefers_lxd(self):
         self.pushConfig("builddmaster", builder_proxy_host=None)
         [ref] = self.factory.makeGitRefs()
         job = self.makeJob(git_ref=ref, allow_internet=False)
@@ -599,7 +599,7 @@ class TestAsyncOCIRecipeBuildBehaviour(
         lxd_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             lxd_lfa, image_type=BuildBaseImageType.LXD)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', lxd_lfa.http_url, '', ''), worker.call_log[0])
         self.assertEqual(1, self.stats_client.incr.call_count)
@@ -610,7 +610,7 @@ class TestAsyncOCIRecipeBuildBehaviour(
                 builder.name),))
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_falls_back_to_chroot(self):
+    def test_dispatchBuildToWorker_falls_back_to_chroot(self):
         self.pushConfig("builddmaster", builder_proxy_host=None)
         [ref] = self.factory.makeGitRefs()
         job = self.makeJob(git_ref=ref, allow_internet=False)
@@ -621,12 +621,12 @@ class TestAsyncOCIRecipeBuildBehaviour(
         chroot_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             chroot_lfa, image_type=BuildBaseImageType.CHROOT)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', chroot_lfa.http_url, '', ''), worker.call_log[0])
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_oci_feature_flag_enabled(self):
+    def test_dispatchBuildToWorker_oci_feature_flag_enabled(self):
         self.pushConfig("builddmaster", builder_proxy_host=None)
         [ref] = self.factory.makeGitRefs()
 
@@ -655,7 +655,7 @@ class TestAsyncOCIRecipeBuildBehaviour(
         lxd_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             lxd_lfa, image_type=BuildBaseImageType.LXD)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(distroseries.name,
             job.build.distro_arch_series.distroseries.name)
         self.assertEqual(
diff --git a/lib/lp/snappy/tests/test_snapbuildbehaviour.py b/lib/lp/snappy/tests/test_snapbuildbehaviour.py
index 14cd8e5..6836941 100644
--- a/lib/lp/snappy/tests/test_snapbuildbehaviour.py
+++ b/lib/lp/snappy/tests/test_snapbuildbehaviour.py
@@ -967,7 +967,7 @@ class TestAsyncSnapBuildBehaviour(StatsMixin, TestSnapBuildBehaviourBase):
             yield job.composeBuildRequest(None)
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_prefers_lxd(self):
+    def test_dispatchBuildToWorker_prefers_lxd(self):
         job = self.makeJob(allow_internet=False)
         builder = MockBuilder()
         builder.processor = job.build.processor
@@ -979,7 +979,7 @@ class TestAsyncSnapBuildBehaviour(StatsMixin, TestSnapBuildBehaviourBase):
         lxd_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             lxd_lfa, image_type=BuildBaseImageType.LXD)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', lxd_lfa.http_url, '', ''), worker.call_log[0])
         self.assertEqual(1, self.stats_client.incr.call_count)
@@ -989,7 +989,7 @@ class TestAsyncSnapBuildBehaviour(StatsMixin, TestSnapBuildBehaviourBase):
                 builder.name),))
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_falls_back_to_chroot(self):
+    def test_dispatchBuildToWorker_falls_back_to_chroot(self):
         job = self.makeJob(allow_internet=False)
         builder = MockBuilder()
         builder.processor = job.build.processor
@@ -998,7 +998,7 @@ class TestAsyncSnapBuildBehaviour(StatsMixin, TestSnapBuildBehaviourBase):
         chroot_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             chroot_lfa, image_type=BuildBaseImageType.CHROOT)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', chroot_lfa.http_url, '', ''), worker.call_log[0])
 
diff --git a/lib/lp/soyuz/model/distroarchseries.py b/lib/lp/soyuz/model/distroarchseries.py
index 32e6525..5acaffb 100644
--- a/lib/lp/soyuz/model/distroarchseries.py
+++ b/lib/lp/soyuz/model/distroarchseries.py
@@ -245,7 +245,7 @@ class DistroArchSeries(SQLBase):
             # This is disallowed partly because files that act as base
             # images for other builds (including public ones) ought to be
             # public on principle, and partly because
-            # BuildFarmJobBehaviourBase.dispatchBuildToSlave doesn't
+            # BuildFarmJobBehaviourBase.dispatchBuildToWorker doesn't
             # currently support sending a token that would allow builders to
             # fetch private URLs.  If we ever need to change this (perhaps
             # for the sake of short-lived security fixes in base images?),
diff --git a/lib/lp/soyuz/tests/test_binarypackagebuildbehaviour.py b/lib/lp/soyuz/tests/test_binarypackagebuildbehaviour.py
index 8935403..89f8474 100644
--- a/lib/lp/soyuz/tests/test_binarypackagebuildbehaviour.py
+++ b/lib/lp/soyuz/tests/test_binarypackagebuildbehaviour.py
@@ -693,7 +693,7 @@ class TestBinaryBuildPackageBehaviourBuildCollection(TestCaseWithFactory):
 
         behaviour = IBuildFarmJobBehaviour(self.build)
         behaviour.setBuilder(self.builder, worker)
-        d = behaviour.getLogFromSlave(self.build.buildqueue_record)
+        d = behaviour.getLogFromWorker(self.build.buildqueue_record)
         return d.addCallback(got_log)
 
     def test_private_build_log_storage(self):
diff --git a/lib/lp/soyuz/tests/test_livefsbuildbehaviour.py b/lib/lp/soyuz/tests/test_livefsbuildbehaviour.py
index 4ca994c..73680d7 100644
--- a/lib/lp/soyuz/tests/test_livefsbuildbehaviour.py
+++ b/lib/lp/soyuz/tests/test_livefsbuildbehaviour.py
@@ -277,7 +277,7 @@ class TestAsyncLiveFSBuildBehaviour(TestLiveFSBuildBehaviourBase):
             build_request)
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_prefers_lxd(self):
+    def test_dispatchBuildToWorker_prefers_lxd(self):
         job = self.makeJob()
         builder = MockBuilder()
         builder.processor = job.build.processor
@@ -289,12 +289,12 @@ class TestAsyncLiveFSBuildBehaviour(TestLiveFSBuildBehaviourBase):
         lxd_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             lxd_lfa, image_type=BuildBaseImageType.LXD)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', lxd_lfa.http_url, '', ''), worker.call_log[0])
 
     @defer.inlineCallbacks
-    def test_dispatchBuildToSlave_falls_back_to_chroot(self):
+    def test_dispatchBuildToWorker_falls_back_to_chroot(self):
         job = self.makeJob()
         builder = MockBuilder()
         builder.processor = job.build.processor
@@ -303,7 +303,7 @@ class TestAsyncLiveFSBuildBehaviour(TestLiveFSBuildBehaviourBase):
         chroot_lfa = self.factory.makeLibraryFileAlias(db_only=True)
         job.build.distro_arch_series.addOrUpdateChroot(
             chroot_lfa, image_type=BuildBaseImageType.CHROOT)
-        yield job.dispatchBuildToSlave(DevNullLogger())
+        yield job.dispatchBuildToWorker(DevNullLogger())
         self.assertEqual(
             ('ensurepresent', chroot_lfa.http_url, '', ''), worker.call_log[0])
 
diff --git a/lib/lp/translations/model/translationtemplatesbuildbehaviour.py b/lib/lp/translations/model/translationtemplatesbuildbehaviour.py
index e04890b..96e3a74 100644
--- a/lib/lp/translations/model/translationtemplatesbuildbehaviour.py
+++ b/lib/lp/translations/model/translationtemplatesbuildbehaviour.py
@@ -3,7 +3,7 @@
 
 """An `IBuildFarmJobBehaviour` for `TranslationTemplatesBuild`.
 
-Dispatches translation template build jobs to build-farm slaves.
+Dispatches translation template build jobs to build-farm workers.
 """
 
 __all__ = [
@@ -37,11 +37,11 @@ from lp.translations.model.approver import TranslationBuildApprover
 
 @implementer(IBuildFarmJobBehaviour)
 class TranslationTemplatesBuildBehaviour(BuildFarmJobBehaviourBase):
-    """Dispatches `TranslationTemplateBuildJob`s to slaves."""
+    """Dispatches `TranslationTemplateBuildJob`s to workers."""
 
     builder_type = "translation-templates"
 
-    # Filename for the tarball of templates that the slave builds.
+    # Filename for the tarball of templates that the worker builds.
     templates_tarball_path = 'translation-templates.tar.gz'
 
     unsafe_chars = '[^a-zA-Z0-9_+-]'
@@ -74,19 +74,19 @@ class TranslationTemplatesBuildBehaviour(BuildFarmJobBehaviourBase):
         return args
 
     def _readTarball(self, buildqueue, filemap, logger):
-        """Read tarball with generated translation templates from slave."""
+        """Read tarball with generated translation templates from worker."""
         if filemap is None:
             logger.error("Slave returned no filemap.")
             return defer.succeed(None)
 
-        slave_filename = filemap.get(self.templates_tarball_path)
-        if slave_filename is None:
-            logger.error("Did not find templates tarball in slave output.")
+        worker_filename = filemap.get(self.templates_tarball_path)
+        if worker_filename is None:
+            logger.error("Did not find templates tarball in worker output.")
             return defer.succeed(None)
 
         fd, fname = tempfile.mkstemp()
         os.close(fd)
-        d = self._slave.getFile(slave_filename, fname)
+        d = self._worker.getFile(worker_filename, fname)
         return d.addCallback(lambda ignored: fname)
 
     def _uploadTarball(self, branch, tarball, logger):
diff --git a/lib/lp/translations/tests/test_translationtemplatesbuildbehaviour.py b/lib/lp/translations/tests/test_translationtemplatesbuildbehaviour.py
index fc1a712..0e446ec 100644
--- a/lib/lp/translations/tests/test_translationtemplatesbuildbehaviour.py
+++ b/lib/lp/translations/tests/test_translationtemplatesbuildbehaviour.py
@@ -137,8 +137,8 @@ class TestTranslationTemplatesBuildBehaviour(
         behaviour = self.makeBehaviour()
         buildqueue = FakeBuildQueue(behaviour)
         path = behaviour.templates_tarball_path
-        # Poke the file we're expecting into the mock slave.
-        behaviour._slave.valid_files[path] = ''
+        # Poke the file we're expecting into the mock worker.
+        behaviour._worker.valid_files[path] = ''
 
         def got_tarball(filename):
             tarball = open(filename, 'r')
@@ -159,16 +159,16 @@ class TestTranslationTemplatesBuildBehaviour(
         behaviour._uploadTarball = FakeMethod()
         queue_item = behaviour.build.queueBuild()
         queue_item.markAsBuilding(self.factory.makeBuilder())
-        slave = behaviour._slave
+        worker = behaviour._worker
 
-        d = slave.status()
+        d = worker.status()
 
         def got_status(status):
             return (
                 behaviour.handleStatus(
                     queue_item, BuilderInteractor.extractBuildStatus(status),
                     status),
-                slave.call_log)
+                worker.call_log)
 
         def build_updated(ignored):
             self.assertEqual(BuildStatus.FULLYBUILT, behaviour.build.status)
@@ -187,9 +187,9 @@ class TestTranslationTemplatesBuildBehaviour(
         behaviour._uploadTarball = FakeMethod()
         queue_item = behaviour.build.queueBuild()
         queue_item.markAsBuilding(self.factory.makeBuilder())
-        slave = behaviour._slave
+        worker = behaviour._worker
 
-        d = slave.status()
+        d = worker.status()
 
         def got_status(status):
             del status['filemap']
@@ -216,9 +216,9 @@ class TestTranslationTemplatesBuildBehaviour(
         behaviour._uploadTarball = FakeMethod()
         queue_item = behaviour.build.queueBuild()
         queue_item.markAsBuilding(self.factory.makeBuilder())
-        slave = behaviour._slave
+        worker = behaviour._worker
 
-        d = slave.status()
+        d = worker.status()
 
         def got_status(status):
             del status['filemap']
@@ -243,7 +243,7 @@ class TestTranslationTemplatesBuildBehaviour(
             branch=branch, filemap={'translation-templates.tar.gz': 'foo'})
         queue_item = behaviour.build.queueBuild()
         queue_item.markAsBuilding(self.factory.makeBuilder())
-        slave = behaviour._slave
+        worker = behaviour._worker
 
         def fake_getFile(sum, path):
             dummy_tar = os.path.join(
@@ -253,8 +253,8 @@ class TestTranslationTemplatesBuildBehaviour(
                 copy_and_close(tar_file, f)
             return defer.succeed(None)
 
-        slave.getFile = fake_getFile
-        d = slave.status()
+        worker.getFile = fake_getFile
+        d = worker.status()
 
         def got_status(status):
             return behaviour.handleStatus(
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