|
| 1 | +import logging |
| 2 | +import uuid |
| 3 | +import time |
| 4 | +from django.core import signals |
| 5 | +from django.conf import settings |
| 6 | +from django.db import models, transaction |
| 7 | +from jsonfield import JSONField |
| 8 | +from api.exceptions import DryccException, AlreadyExists, ServiceUnavailable |
| 9 | +from api.models import UuidAuditedModel, validate_label |
| 10 | +from scheduler import KubeException |
| 11 | +from tasks import task, apply_async |
| 12 | + |
| 13 | +logger = logging.getLogger(__name__) |
| 14 | + |
| 15 | + |
| 16 | +class Resource(UuidAuditedModel): |
| 17 | + owner = models.ForeignKey(settings.AUTH_USER_MODEL, |
| 18 | + on_delete=models.PROTECT) |
| 19 | + app = models.ForeignKey('App', on_delete=models.CASCADE) |
| 20 | + name = models.CharField(max_length=63, validators=[validate_label]) |
| 21 | + plan = models.CharField(max_length=128) |
| 22 | + data = JSONField(default={}, blank=True) |
| 23 | + status = models.CharField(max_length=32, null=True) |
| 24 | + binding = models.CharField(max_length=32, null=True) |
| 25 | + options = JSONField(default={}, blank=True) |
| 26 | + |
| 27 | + class Meta: |
| 28 | + get_latest_by = 'created' |
| 29 | + unique_together = (('app', 'name'),) |
| 30 | + ordering = ['-created'] |
| 31 | + |
| 32 | + def __str__(self): |
| 33 | + return self.name |
| 34 | + |
| 35 | + @transaction.atomic |
| 36 | + def save(self, *args, **kwargs): |
| 37 | + # Attach ServiceInstance, updates k8s |
| 38 | + if self.created == self.updated: |
| 39 | + self.attach(*args, **kwargs) |
| 40 | + # Save to DB |
| 41 | + return super(Resource, self).save(*args, **kwargs) |
| 42 | + |
| 43 | + def attach(self, *args, **kwargs): |
| 44 | + try: |
| 45 | + self._scheduler.servicecatalog.get_instance(self.app.id, self.name) |
| 46 | + err = "Resource {} already exists in this namespace".format(self.name) # noqa |
| 47 | + self.log(err, logging.INFO) |
| 48 | + raise AlreadyExists(err) |
| 49 | + except KubeException as e: |
| 50 | + logger.info(e) |
| 51 | + try: |
| 52 | + instance = self.plan.split(":") |
| 53 | + kwargs = { |
| 54 | + "instance_class": instance[0], |
| 55 | + "instance_plan": ":".join(instance[1:]), |
| 56 | + "parameters": self.options, |
| 57 | + } |
| 58 | + self._scheduler.servicecatalog.create_instance( |
| 59 | + self.app.id, self.name, **kwargs |
| 60 | + ) |
| 61 | + # create/patch/put retrieve_task |
| 62 | + data = { |
| 63 | + "task_id": uuid.uuid4().hex, |
| 64 | + "resource_id": str(self.uuid), |
| 65 | + } |
| 66 | + apply_async(retrieve_task, delay=30000, args=(data, )) |
| 67 | + except KubeException as e: |
| 68 | + msg = 'There was a problem creating the resource ' \ |
| 69 | + '{} for {}'.format(self.name, self.app_id) |
| 70 | + raise ServiceUnavailable(msg) from e |
| 71 | + |
| 72 | + @transaction.atomic |
| 73 | + def delete(self, *args, **kwargs): |
| 74 | + if self.binding and self.binding == "Ready": |
| 75 | + raise DryccException("the plan is still binding") |
| 76 | + # Deatch ServiceInstance, updates k8s |
| 77 | + self.detach(*args, **kwargs) |
| 78 | + # Delete from DB |
| 79 | + return super(Resource, self).delete(*args, **kwargs) |
| 80 | + |
| 81 | + def detach(self, *args, **kwargs): |
| 82 | + try: |
| 83 | + # We raise an exception when a resource doesn't exist |
| 84 | + self._scheduler.servicecatalog.get_instance(self.app.id, self.name) |
| 85 | + self._scheduler.servicecatalog.delete_instance(self.app.id, self.name) |
| 86 | + except KubeException as e: |
| 87 | + raise ServiceUnavailable("Could not delete volume {} for application {}".format(name, self.app_id)) from e # noqa |
| 88 | + |
| 89 | + def log(self, message, level=logging.INFO): |
| 90 | + """Logs a message in the context of this service. |
| 91 | +
|
| 92 | + This prefixes log messages with an application "tag" that the customized |
| 93 | + drycc-logspout will be on the lookout for. When it's seen, the message-- usually |
| 94 | + an application event of some sort like releasing or scaling, will be considered |
| 95 | + as "belonging" to the application instead of the controller and will be handled |
| 96 | + accordingly. |
| 97 | + """ |
| 98 | + logger.log(level, "[{}]: {}".format(self.id, message)) |
| 99 | + |
| 100 | + def bind(self, *args, **kwargs): |
| 101 | + if self.status != "Ready": |
| 102 | + raise DryccException("the resource is not ready") |
| 103 | + if self.binding == "Ready": |
| 104 | + raise DryccException("the resource is binding") |
| 105 | + try: |
| 106 | + self._scheduler.servicecatalog.get_binding(self.app.id, self.name) |
| 107 | + err = "Resource {} is binding".format(self.name) |
| 108 | + self.log(err, logging.INFO) |
| 109 | + raise AlreadyExists(err) |
| 110 | + except KubeException as e: |
| 111 | + logger.info(e) |
| 112 | + try: |
| 113 | + self._scheduler.servicecatalog.create_binding( |
| 114 | + self.app.id, self.name, **kwargs) |
| 115 | + # create/patch/put retrieve_task |
| 116 | + data = { |
| 117 | + "task_id": uuid.uuid4().hex, |
| 118 | + "resource_id": str(self.uuid), |
| 119 | + } |
| 120 | + apply_async(retrieve_task, delay=30000, args=(data, )) |
| 121 | + except KubeException as e: |
| 122 | + msg = 'There was a problem binding the resource ' \ |
| 123 | + '{} for {}'.format(self.name, self.app_id) |
| 124 | + raise ServiceUnavailable(msg) from e |
| 125 | + |
| 126 | + def unbind(self, *args, **kwargs): |
| 127 | + if self.binding != "Ready": |
| 128 | + raise DryccException("the resource is not binding") |
| 129 | + try: |
| 130 | + # We raise an exception when a resource doesn't exist |
| 131 | + self._scheduler.servicecatalog.get_binding(self.app.id, self.name) |
| 132 | + self._scheduler.servicecatalog.delete_binding(self.app.id, self.name) |
| 133 | + except KubeException as e: |
| 134 | + raise ServiceUnavailable("Could not unbind resource {} for application {}".format(self.name, self.app_id)) from e # noqa |
| 135 | + |
| 136 | + def attach_update(self, *args, **kwargs): |
| 137 | + try: |
| 138 | + data = self._scheduler.servicecatalog.get_instance( |
| 139 | + self.app.id, self.name).json() |
| 140 | + except KubeException as e: |
| 141 | + self.log("certificate {} does not exist".format(self.app.id), |
| 142 | + level=logging.INFO) |
| 143 | + data = None |
| 144 | + logger.info(e) |
| 145 | + try: |
| 146 | + version = data["metadata"]["resourceVersion"] |
| 147 | + instance = self.plan.split(":") |
| 148 | + kwargs = { |
| 149 | + "instance_class": instance[0], |
| 150 | + "instance_plan": ":".join(instance[1:]), |
| 151 | + "parameters": self.options, |
| 152 | + } |
| 153 | + self._scheduler.servicecatalog.put_instance( |
| 154 | + self.app.id, self.name, version, **kwargs |
| 155 | + ) |
| 156 | + # create/patch/put retrieve_task |
| 157 | + data = { |
| 158 | + "task_id": uuid.uuid4().hex, |
| 159 | + "resource_id": str(self.uuid), |
| 160 | + } |
| 161 | + apply_async(retrieve_task, delay=30000, args=(data, )) |
| 162 | + except KubeException as e: |
| 163 | + msg = 'There was a problem update the resource ' \ |
| 164 | + '{} for {}'.format(self.name, self.app_id) |
| 165 | + raise ServiceUnavailable(msg) from e |
| 166 | + |
| 167 | + def retrieve(self, *args, **kwargs): |
| 168 | + update_flag = False |
| 169 | + if self.status != "Ready": |
| 170 | + try: |
| 171 | + resp_i = self._scheduler.servicecatalog.get_instance( |
| 172 | + self.app.id, self.name).json() |
| 173 | + self.status = resp_i.get('status', {}).\ |
| 174 | + get('lastConditionState', '').lower() |
| 175 | + update_flag = True |
| 176 | + except KubeException as e: |
| 177 | + logger.info("retrieve instance info error: {}".format(e)) |
| 178 | + if self.binding != "Ready": |
| 179 | + try: |
| 180 | + # We raise an exception when a resource doesn't exist |
| 181 | + resp_b = self._scheduler.servicecatalog.get_binding( |
| 182 | + self.app.id, self.name).json() |
| 183 | + self.binding = resp_b.get('status', {}).\ |
| 184 | + get('lastConditionState', '').lower() |
| 185 | + self.options = resp_b.get('spec', {}).get('parameters', {}) |
| 186 | + update_flag = True |
| 187 | + secret_name = resp_b.get('spec', {}).get('secretName') |
| 188 | + if secret_name: |
| 189 | + resp_s = self._scheduler.secret.get( |
| 190 | + self.app.id, secret_name).json() |
| 191 | + self.data = resp_s.get('data', {}) |
| 192 | + update_flag = True |
| 193 | + except KubeException as e: |
| 194 | + logger.info("retrieve binding info error: {}".format(e)) |
| 195 | + if update_flag is True: |
| 196 | + self.save() |
| 197 | + if self.status and self.binding: |
| 198 | + return True |
| 199 | + else: |
| 200 | + return False |
| 201 | + |
| 202 | + def detach_resource(self, *args, **kwargs): |
| 203 | + if self.binding != "Ready": |
| 204 | + try: |
| 205 | + resp_b = self._scheduler.servicecatalog.get_binding( |
| 206 | + self.app.id, self.name).json() |
| 207 | + secret_name = resp_b.get('spec', {}).get('secretName') |
| 208 | + if secret_name: |
| 209 | + self._scheduler.secret.delete(self.app.id, secret_name) |
| 210 | + self._scheduler.servicecatalog.delete_binding( |
| 211 | + self.app.id, self.name) |
| 212 | + except KubeException as e: |
| 213 | + logger.info("delete binding info error: {}".format(e)) |
| 214 | + self.binding = None |
| 215 | + |
| 216 | + if (self.status != "Ready") or (self.binding is None): |
| 217 | + try: |
| 218 | + self._scheduler.servicecatalog.delete_instance( |
| 219 | + self.app.id, self.name) |
| 220 | + except KubeException as e: |
| 221 | + logger.info("retrieve instance info error: {}".format(e)) |
| 222 | + |
| 223 | + |
| 224 | +@task |
| 225 | +def retrieve_task(data): |
| 226 | + try: |
| 227 | + signals.request_started.send(sender=data['task_id']) |
| 228 | + try: |
| 229 | + resource = Resource.objects.get(uuid=data['resource_id']) |
| 230 | + except Resource.DoesNotExist: |
| 231 | + logger.info("retrieve task not found resource: {}".format(data['resource_id'])) # noqa |
| 232 | + return True |
| 233 | + _ = resource.retrieve() |
| 234 | + if _: |
| 235 | + return True |
| 236 | + else: |
| 237 | + t = time.time() - resource.created.timestamps() |
| 238 | + if t < 3600: |
| 239 | + apply_async(retrieve_task, delay=30000, args=(data, )) |
| 240 | + elif t < 3600 * 12: |
| 241 | + apply_async(retrieve_task, delay=1800000, args=(data, )) |
| 242 | + else: |
| 243 | + resource.detach_resource() |
| 244 | + finally: |
| 245 | + signals.request_finished.send(sender=data['task_id']) |
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