Merge pull request #12587 from ansible/mesh-scaling-backend

Allow for adding external execution nodes via API

.github/ISSUE_TEMPLATE.md

@@ -25,7 +25,7 @@ Instead use the bug or feature request.
 <!--- Pick one below and delete the rest: -->
  - Breaking Change
  - New or Enhanced Feature
- - Bug, Docs Fix or other nominal change
+ - Bug or Docs Fix
 
 
 ##### COMPONENT NAME

.github/PULL_REQUEST_TEMPLATE.md

@@ -11,7 +11,7 @@ the change does.
 <!--- Pick one below and delete the rest: -->
  - Breaking Change 
  - New or Enhanced Feature
- - Bug, Docs Fix or other nominal change
+ - Bug or Docs Fix
 
 ##### COMPONENT NAME
 <!--- Name of the module/plugin/module/task -->

.github/triage_replies.md

@@ -93,9 +93,6 @@ The Ansible Community is looking at building an EE that corresponds to all of th
 - AWX: https://github.com/ansible/awx/blob/devel/CONTRIBUTING.md
 - AWX-Operator: https://github.com/ansible/awx-operator/blob/devel/CONTRIBUTING.md
 
-### Oracle AWX
-We'd be happy to help if you can reproduce this with AWX since we do not have Oracle's Linux Automation Manager. If you need help with this specific version of Oracles Linux Automation Manager you will need to contact your Oracle for support. 
-
 ### AWX Release
 Subject: Announcing AWX Xa.Ya.za and AWX-Operator Xb.Yb.zb
 

.github/workflows/pr_body_check.yml

@@ -1,45 +0,0 @@
----
-name: PR Check
-env:
-  BRANCH: ${{ github.base_ref || 'devel' }}
-on:
-  pull_request:
-    types: [opened, edited, reopened, synchronize]
-jobs:
-  pr-check:
-    name: Scan PR description for semantic versioning keywords
-    runs-on: ubuntu-latest
-    permissions:
-      packages: write
-      contents: read
-    steps:
-      - name: Write PR body to a file
-        run: |
-          cat >> pr.body << __SOME_RANDOM_PR_EOF__
-          ${{ github.event.pull_request.body }}
-          __SOME_RANDOM_PR_EOF__
-
-      - name: Display the received body for troubleshooting
-        run: cat pr.body
-
-      # We want to write these out individually just incase the options were joined on a single line
-      - name: Check for each of the lines
-        run: |
-          grep "Bug, Docs Fix or other nominal change" pr.body > Z
-          grep "New or Enhanced Feature" pr.body > Y
-          grep "Breaking Change" pr.body > X
-          exit 0
-        # We exit 0 and set the shell to prevent the returns from the greps from failing this step
-        # See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference
-        shell: bash {0}
-
-      - name: Check for exactly one item
-        run: |
-          if [ $(cat X Y Z | wc -l) != 1 ] ; then
-            echo "The PR body must contain exactly one of [ 'Bug, Docs Fix or other nominal change', 'New or Enhanced Feature', 'Breaking Change' ]"
-            echo "We counted $(cat X Y Z | wc -l)"
-            echo "See the default PR body for examples"
-            exit 255;
-          else
-            exit 0;
-          fi

awx/api/serializers.py

@@ -4753,7 +4753,7 @@ class ScheduleSerializer(LaunchConfigurationBaseSerializer, SchedulePreviewSeria
 class InstanceLinkSerializer(BaseSerializer):
     class Meta:
         model = InstanceLink
-        fields = ('source', 'target')
+        fields = ('source', 'target', 'link_state')
 
     source = serializers.SlugRelatedField(slug_field="hostname", read_only=True)
     target = serializers.SlugRelatedField(slug_field="hostname", read_only=True)
@@ -4762,31 +4762,25 @@ class InstanceLinkSerializer(BaseSerializer):
 class InstanceNodeSerializer(BaseSerializer):
     class Meta:
         model = Instance
-        fields = ('id', 'hostname', 'node_type', 'node_state')
+        fields = ('id', 'hostname', 'node_type', 'node_state', 'enabled')
-
-    node_state = serializers.SerializerMethodField()
-
-    def get_node_state(self, obj):
-        if not obj.enabled:
-            return "disabled"
-        return "error" if obj.errors else "healthy"
 
 
 class InstanceSerializer(BaseSerializer):
 
     consumed_capacity = serializers.SerializerMethodField()
     percent_capacity_remaining = serializers.SerializerMethodField()
-    jobs_running = serializers.IntegerField(help_text=_('Count of jobs in the running or waiting state that ' 'are targeted for this instance'), read_only=True)
+    jobs_running = serializers.IntegerField(help_text=_('Count of jobs in the running or waiting state that are targeted for this instance'), read_only=True)
     jobs_total = serializers.IntegerField(help_text=_('Count of all jobs that target this instance'), read_only=True)
 
     class Meta:
         model = Instance
-        read_only_fields = ('uuid', 'hostname', 'version', 'node_type')
+        read_only_fields = ('uuid', 'hostname', 'version', 'node_type', 'node_state')
         fields = (
             "id",
             "type",
             "url",
             "related",
+            "summary_fields",
             "uuid",
             "hostname",
             "created",
@@ -4808,6 +4802,7 @@ class InstanceSerializer(BaseSerializer):
             "enabled",
             "managed_by_policy",
             "node_type",
+            "node_state",
         )
 
     def get_related(self, obj):
@@ -4819,6 +4814,14 @@ class InstanceSerializer(BaseSerializer):
                 res['health_check'] = self.reverse('api:instance_health_check', kwargs={'pk': obj.pk})
         return res
 
+    def get_summary_fields(self, obj):
+        summary = super().get_summary_fields(obj)
+
+        if self.is_detail_view:
+            summary['links'] = InstanceLinkSerializer(InstanceLink.objects.select_related('target', 'source').filter(source=obj), many=True).data
+
+        return summary
+
     def get_consumed_capacity(self, obj):
         return obj.consumed_capacity
 

awx/api/views/__init__.py

@@ -440,6 +440,7 @@ class InstanceHealthCheck(GenericAPIView):
     def post(self, request, *args, **kwargs):
         obj = self.get_object()
 
+        # Note: hop nodes are already excluded by the get_queryset method
         if obj.node_type == 'execution':
             from awx.main.tasks.system import execution_node_health_check
 

awx/main/management/commands/register_peers.py

@@ -27,7 +27,9 @@ class Command(BaseCommand):
         )
 
     def handle(self, **options):
+        # provides a mapping of hostname to Instance objects
         nodes = Instance.objects.in_bulk(field_name='hostname')
+
         if options['source'] not in nodes:
             raise CommandError(f"Host {options['source']} is not a registered instance.")
         if not (options['peers'] or options['disconnect'] or options['exact'] is not None):
@@ -57,7 +59,9 @@ class Command(BaseCommand):
 
             results = 0
             for target in options['peers']:
-                _, created = InstanceLink.objects.get_or_create(source=nodes[options['source']], target=nodes[target])
+                _, created = InstanceLink.objects.update_or_create(
+                    source=nodes[options['source']], target=nodes[target], defaults={'link_state': InstanceLink.States.ESTABLISHED}
+                )
                 if created:
                     results += 1
 
@@ -80,7 +84,9 @@ class Command(BaseCommand):
                 links = set(InstanceLink.objects.filter(source=nodes[options['source']]).values_list('target__hostname', flat=True))
                 removals, _ = InstanceLink.objects.filter(source=nodes[options['source']], target__hostname__in=links - peers).delete()
                 for target in peers - links:
-                    _, created = InstanceLink.objects.get_or_create(source=nodes[options['source']], target=nodes[target])
+                    _, created = InstanceLink.objects.update_or_create(
+                        source=nodes[options['source']], target=nodes[target], defaults={'link_state': InstanceLink.States.ESTABLISHED}
+                    )
                     if created:
                         additions += 1
 

awx/main/managers.py

@@ -129,10 +129,13 @@ class InstanceManager(models.Manager):
                 # if instance was not retrieved by uuid and hostname was, use the hostname
                 instance = self.filter(hostname=hostname)
 
+            from awx.main.models import Instance
+
             # Return existing instance
             if instance.exists():
                 instance = instance.first()  # in the unusual occasion that there is more than one, only get one
-                update_fields = []
+                instance.node_state = Instance.States.INSTALLED  # Wait for it to show up on the mesh
+                update_fields = ['node_state']
                 # if instance was retrieved by uuid and hostname has changed, update hostname
                 if instance.hostname != hostname:
                     logger.warning("passed in hostname {0} is different from the original hostname {1}, updating to {0}".format(hostname, instance.hostname))
@@ -141,6 +144,7 @@ class InstanceManager(models.Manager):
                 # if any other fields are to be updated
                 if instance.ip_address != ip_address:
                     instance.ip_address = ip_address
+                    update_fields.append('ip_address')
                 if instance.node_type != node_type:
                     instance.node_type = node_type
                     update_fields.append('node_type')
@@ -151,12 +155,12 @@ class InstanceManager(models.Manager):
                     return (False, instance)
 
             # Create new instance, and fill in default values
-            create_defaults = dict(capacity=0)
+            create_defaults = {'node_state': Instance.States.INSTALLED, 'capacity': 0}
             if defaults is not None:
                 create_defaults.update(defaults)
             uuid_option = {}
             if uuid is not None:
-                uuid_option = dict(uuid=uuid)
+                uuid_option = {'uuid': uuid}
             if node_type == 'execution' and 'version' not in create_defaults:
                 create_defaults['version'] = RECEPTOR_PENDING
             instance = self.create(hostname=hostname, ip_address=ip_address, node_type=node_type, **create_defaults, **uuid_option)

awx/main/migrations/0165_node_and_link_state.py

@@ -0,0 +1,79 @@
+# Generated by Django 3.2.13 on 2022-08-02 17:53
+
+import django.core.validators
+from django.db import migrations, models
+
+
+def forwards(apps, schema_editor):
+    # All existing InstanceLink objects need to be in the state
+    # 'Established', which is the default, so nothing needs to be done
+    # for that.
+
+    Instance = apps.get_model('main', 'Instance')
+    for instance in Instance.objects.all():
+        instance.node_state = 'ready' if not instance.errors else 'unavailable'
+        instance.save(update_fields=['node_state'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0164_remove_inventorysource_update_on_project_update'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='instance',
+            name='listener_port',
+            field=models.PositiveIntegerField(
+                blank=True,
+                default=27199,
+                help_text='Port that Receptor will listen for incoming connections on.',
+                validators=[django.core.validators.MinValueValidator(1), django.core.validators.MaxValueValidator(65535)],
+            ),
+        ),
+        migrations.AddField(
+            model_name='instance',
+            name='node_state',
+            field=models.CharField(
+                choices=[
+                    ('provisioning', 'Provisioning'),
+                    ('provision-fail', 'Provisioning Failure'),
+                    ('installed', 'Installed'),
+                    ('ready', 'Ready'),
+                    ('unavailable', 'Unavailable'),
+                    ('deprovisioning', 'De-provisioning'),
+                    ('deprovision-fail', 'De-provisioning Failure'),
+                ],
+                default='ready',
+                help_text='Indicates the current life cycle stage of this instance.',
+                max_length=16,
+            ),
+        ),
+        migrations.AddField(
+            model_name='instancelink',
+            name='link_state',
+            field=models.CharField(
+                choices=[('adding', 'Adding'), ('established', 'Established'), ('removing', 'Removing')],
+                default='established',
+                help_text='Indicates the current life cycle stage of this peer link.',
+                max_length=16,
+            ),
+        ),
+        migrations.AlterField(
+            model_name='instance',
+            name='node_type',
+            field=models.CharField(
+                choices=[
+                    ('control', 'Control plane node'),
+                    ('execution', 'Execution plane node'),
+                    ('hybrid', 'Controller and execution'),
+                    ('hop', 'Message-passing node, no execution capability'),
+                ],
+                default='hybrid',
+                help_text='Role that this node plays in the mesh.',
+                max_length=16,
+            ),
+        ),
+        migrations.RunPython(forwards, reverse_code=migrations.RunPython.noop),
+    ]

awx/main/models/ha.py

@@ -5,7 +5,7 @@ from decimal import Decimal
 import logging
 import os
 
-from django.core.validators import MinValueValidator
+from django.core.validators import MinValueValidator, MaxValueValidator
 from django.db import models, connection
 from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
@@ -58,6 +58,15 @@ class InstanceLink(BaseModel):
     source = models.ForeignKey('Instance', on_delete=models.CASCADE, related_name='+')
     target = models.ForeignKey('Instance', on_delete=models.CASCADE, related_name='reverse_peers')
 
+    class States(models.TextChoices):
+        ADDING = 'adding', _('Adding')
+        ESTABLISHED = 'established', _('Established')
+        REMOVING = 'removing', _('Removing')
+
+    link_state = models.CharField(
+        choices=States.choices, default=States.ESTABLISHED, max_length=16, help_text=_("Indicates the current life cycle stage of this peer link.")
+    )
+
     class Meta:
         unique_together = ('source', 'target')
 
@@ -126,13 +135,33 @@ class Instance(HasPolicyEditsMixin, BaseModel):
         default=0,
         editable=False,
     )
-    NODE_TYPE_CHOICES = [
+
-        ("control", "Control plane node"),
+    class Types(models.TextChoices):
-        ("execution", "Execution plane node"),
+        CONTROL = 'control', _("Control plane node")
-        ("hybrid", "Controller and execution"),
+        EXECUTION = 'execution', _("Execution plane node")
-        ("hop", "Message-passing node, no execution capability"),
+        HYBRID = 'hybrid', _("Controller and execution")
-    ]
+        HOP = 'hop', _("Message-passing node, no execution capability")
-    node_type = models.CharField(default='hybrid', choices=NODE_TYPE_CHOICES, max_length=16)
+
+    node_type = models.CharField(default=Types.HYBRID, choices=Types.choices, max_length=16, help_text=_("Role that this node plays in the mesh."))
+
+    class States(models.TextChoices):
+        PROVISIONING = 'provisioning', _('Provisioning')
+        PROVISION_FAIL = 'provision-fail', _('Provisioning Failure')
+        INSTALLED = 'installed', _('Installed')
+        READY = 'ready', _('Ready')
+        UNAVAILABLE = 'unavailable', _('Unavailable')
+        DEPROVISIONING = 'deprovisioning', _('De-provisioning')
+        DEPROVISION_FAIL = 'deprovision-fail', _('De-provisioning Failure')
+
+    node_state = models.CharField(
+        choices=States.choices, default=States.READY, max_length=16, help_text=_("Indicates the current life cycle stage of this instance.")
+    )
+    listener_port = models.PositiveIntegerField(
+        blank=True,
+        default=27199,
+        validators=[MinValueValidator(1), MaxValueValidator(65535)],
+        help_text=_("Port that Receptor will listen for incoming connections on."),
+    )
 
     peers = models.ManyToManyField('self', symmetrical=False, through=InstanceLink, through_fields=('source', 'target'))
 
@@ -209,15 +238,18 @@ class Instance(HasPolicyEditsMixin, BaseModel):
         return self.last_seen < ref_time - timedelta(seconds=grace_period)
 
     def mark_offline(self, update_last_seen=False, perform_save=True, errors=''):
-        if self.cpu_capacity == 0 and self.mem_capacity == 0 and self.capacity == 0 and self.errors == errors and (not update_last_seen):
+        if self.node_state not in (Instance.States.READY, Instance.States.UNAVAILABLE, Instance.States.INSTALLED):
             return
+        if self.node_state == Instance.States.UNAVAILABLE and self.errors == errors and (not update_last_seen):
+            return
+        self.node_state = Instance.States.UNAVAILABLE
         self.cpu_capacity = self.mem_capacity = self.capacity = 0
         self.errors = errors
         if update_last_seen:
             self.last_seen = now()
 
         if perform_save:
-            update_fields = ['capacity', 'cpu_capacity', 'mem_capacity', 'errors']
+            update_fields = ['node_state', 'capacity', 'cpu_capacity', 'mem_capacity', 'errors']
             if update_last_seen:
                 update_fields += ['last_seen']
             self.save(update_fields=update_fields)
@@ -274,6 +306,9 @@ class Instance(HasPolicyEditsMixin, BaseModel):
         if not errors:
             self.refresh_capacity_fields()
             self.errors = ''
+            if self.node_state in (Instance.States.UNAVAILABLE, Instance.States.INSTALLED):
+                self.node_state = Instance.States.READY
+                update_fields.append('node_state')
         else:
             self.mark_offline(perform_save=False, errors=errors)
         update_fields.extend(['cpu_capacity', 'mem_capacity', 'capacity'])
@@ -292,7 +327,7 @@ class Instance(HasPolicyEditsMixin, BaseModel):
             # playbook event data; we should consider this a zero capacity event
             redis.Redis.from_url(settings.BROKER_URL).ping()
         except redis.ConnectionError:
-            errors = _('Failed to connect ot Redis')
+            errors = _('Failed to connect to Redis')
 
         self.save_health_data(awx_application_version, get_cpu_count(), get_mem_in_bytes(), update_last_seen=True, errors=errors)
 

awx/main/scheduler/task_manager_models.py

@@ -38,7 +38,9 @@ class TaskManagerInstances:
         self.instances_by_hostname = dict()
         if instances is None:
             instances = (
-                Instance.objects.filter(hostname__isnull=False, enabled=True).exclude(node_type='hop').only('node_type', 'capacity', 'hostname', 'enabled')
+                Instance.objects.filter(hostname__isnull=False, node_state=Instance.States.READY, enabled=True)
+                .exclude(node_type='hop')
+                .only('node_type', 'node_state', 'capacity', 'hostname', 'enabled')
             )
         for instance in instances:
             self.instances_by_hostname[instance.hostname] = TaskManagerInstance(instance)

awx/main/tasks/system.py

@@ -114,7 +114,7 @@ def inform_cluster_of_shutdown():
     try:
         this_inst = Instance.objects.get(hostname=settings.CLUSTER_HOST_ID)
         this_inst.mark_offline(update_last_seen=True, errors=_('Instance received normal shutdown signal'))
-        logger.warning('Normal shutdown signal for instance {}, ' 'removed self from capacity pool.'.format(this_inst.hostname))
+        logger.warning('Normal shutdown signal for instance {}, removed self from capacity pool.'.format(this_inst.hostname))
     except Exception:
         logger.exception('Encountered problem with normal shutdown signal.')
 
@@ -341,9 +341,13 @@ def _cleanup_images_and_files(**kwargs):
             logger.info(f'Performed local cleanup with kwargs {kwargs}, output:\n{stdout}')
 
     # if we are the first instance alphabetically, then run cleanup on execution nodes
-    checker_instance = Instance.objects.filter(node_type__in=['hybrid', 'control'], enabled=True, capacity__gt=0).order_by('-hostname').first()
+    checker_instance = (
+        Instance.objects.filter(node_type__in=['hybrid', 'control'], node_state=Instance.States.READY, enabled=True, capacity__gt=0)
+        .order_by('-hostname')
+        .first()
+    )
     if checker_instance and this_inst.hostname == checker_instance.hostname:
-        for inst in Instance.objects.filter(node_type='execution', enabled=True, capacity__gt=0):
+        for inst in Instance.objects.filter(node_type='execution', node_state=Instance.States.READY, enabled=True, capacity__gt=0):
             runner_cleanup_kwargs = inst.get_cleanup_task_kwargs(**kwargs)
             if not runner_cleanup_kwargs:
                 continue
@@ -399,6 +403,9 @@ def execution_node_health_check(node):
     if instance.node_type != 'execution':
         raise RuntimeError(f'Execution node health check ran against {instance.node_type} node {instance.hostname}')
 
+    if instance.node_state not in (Instance.States.READY, Instance.States.UNAVAILABLE, Instance.States.INSTALLED):
+        raise RuntimeError(f"Execution node health check ran against node {instance.hostname} in state {instance.node_state}")
+
     data = worker_info(node)
 
     prior_capacity = instance.capacity
@@ -432,6 +439,7 @@ def inspect_execution_nodes(instance_list):
 
         nowtime = now()
         workers = mesh_status['Advertisements']
+
         for ad in workers:
             hostname = ad['NodeID']
 
@@ -445,9 +453,7 @@ def inspect_execution_nodes(instance_list):
             if instance.node_type in ('control', 'hybrid'):
                 continue
 
-            was_lost = instance.is_lost(ref_time=nowtime)
             last_seen = parse_date(ad['Time'])
-
             if instance.last_seen and instance.last_seen >= last_seen:
                 continue
             instance.last_seen = last_seen
@@ -455,12 +461,12 @@ def inspect_execution_nodes(instance_list):
 
             # Only execution nodes should be dealt with by execution_node_health_check
             if instance.node_type == 'hop':
-                if was_lost and (not instance.is_lost(ref_time=nowtime)):
+                if instance.node_state in (Instance.States.UNAVAILABLE, Instance.States.INSTALLED):
                     logger.warning(f'Hop node {hostname}, has rejoined the receptor mesh')
                     instance.save_health_data(errors='')
                 continue
 
-            if was_lost:
+            if instance.node_state in (Instance.States.UNAVAILABLE, Instance.States.INSTALLED):
                 # if the instance *was* lost, but has appeared again,
                 # attempt to re-establish the initial capacity and version
                 # check
@@ -479,7 +485,7 @@ def inspect_execution_nodes(instance_list):
 def cluster_node_heartbeat():
     logger.debug("Cluster node heartbeat task.")
     nowtime = now()
-    instance_list = list(Instance.objects.all())
+    instance_list = list(Instance.objects.filter(node_state__in=(Instance.States.READY, Instance.States.UNAVAILABLE, Instance.States.INSTALLED)))
     this_inst = None
     lost_instances = []
 
@@ -530,9 +536,9 @@ def cluster_node_heartbeat():
         try:
             if settings.AWX_AUTO_DEPROVISION_INSTANCES:
                 deprovision_hostname = other_inst.hostname
-                other_inst.delete()
+                other_inst.delete()  # FIXME: what about associated inbound links?
                 logger.info("Host {} Automatically Deprovisioned.".format(deprovision_hostname))
-            elif other_inst.capacity != 0 or (not other_inst.errors):
+            elif other_inst.node_state == Instance.States.READY:
                 other_inst.mark_offline(errors=_('Another cluster node has determined this instance to be unresponsive'))
                 logger.error("Host {} last checked in at {}, marked as lost.".format(other_inst.hostname, other_inst.last_seen))