Central data models of NAV’s event/alert subsystems

EventQueue

class nav.models.event.EventQueue(*args, **kwargs)

From NAV Wiki: The event queue. Additional data in eventqvar. Different subsystem (specified in source) post events on the event queue. Normally event engine is the target and will take the event off the event queue and process it. getDeviceData are in some cases the target.

Parameters

• id (AutoField) – Primary key: Id

• subid (VarcharField) – Subid

• time (DateTimeField) – Time

• state (CharField) – State

• value (IntegerField) – Value

• severity (IntegerField) – Severity

Relationship fields:

Parameters

• source (ForeignKey to Subsystem) – Source (related name: source_of_events)

• target (ForeignKey to Subsystem) – Target (related name: target_of_events)

• device (ForeignKey to Device) – Device (related name: events)

• netbox (ForeignKey to Netbox) – Netbox (related name: events)

• event_type (ForeignKey to EventType) – Event type (related name: events)

Reverse relationships:

Parameters

variables (Reverse ForeignKey from EventQueueVar) – All variables of this event queue (related name of event_queue)

exception DoesNotExist

exception MultipleObjectsReturned

STATE_CHOICES = (('x', 'stateless'), ('s', 'start'), ('e', 'end'))

STATE_END = 'e'

STATE_START = 's'

STATE_STATELESS = 'x'

device

Type: ForeignKey to Device

Device (related name: events)

device_id

Internal field, use device instead.

event_type

Type: ForeignKey to EventType

Event type (related name: events)

event_type_id

Internal field, use event_type instead.

get_next_by_time(*, field=<django.db.models.DateTimeField: time>, is_next=True, **kwargs)

Finds next instance based on time. See get_next_by_FOO() for more information.

get_previous_by_time(*, field=<django.db.models.DateTimeField: time>, is_next=False, **kwargs)

Finds previous instance based on time. See get_previous_by_FOO() for more information.

get_state_display(*, field=<django.db.models.CharField: state>)

Shows the label of the state. See get_FOO_display() for more information.

id

Type: AutoField

Primary key: Id

netbox

Type: ForeignKey to Netbox

Netbox (related name: events)

netbox_id

Internal field, use netbox instead.

objects = <django.db.models.Manager object>

save(*args, **kwargs)

Save the current instance. Override this in a subclass if you want to control the saving process.

The ‘force_insert’ and ‘force_update’ parameters can be used to insist that the “save” must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set.

severity

Type: IntegerField

Severity

source

Type: ForeignKey to Subsystem

Source (related name: source_of_events)

source_id

Internal field, use source instead.

state

Type: CharField

State

Choices:

• x

• s

• e

subid

Type: VarcharField

Subid

target

Type: ForeignKey to Subsystem

Target (related name: target_of_events)

target_id

Internal field, use target instead.

time

Type: DateTimeField

Time

value

Type: IntegerField

Value

variables

Type: Reverse ForeignKey from EventQueueVar

All variables of this event queue (related name of event_queue)

varmap

EventQueueVar

class nav.models.event.EventQueueVar(*args, **kwargs)

From NAV Wiki: Defines additional (key,value) tuples that follow events.

Parameters

• id (AutoField) – Primary key: ID

• variable (VarcharField) – Variable

• value (TextField) – Value

Relationship fields:

Parameters

event_queue (ForeignKey to EventQueue) – Event queue (related name: variables)

exception DoesNotExist

exception MultipleObjectsReturned

event_queue

Type: ForeignKey to EventQueue

Event queue (related name: variables)

event_queue_id

Internal field, use event_queue instead.

id

Type: AutoField

Primary key: ID

objects = <django.db.models.Manager object>

value

Type: TextField

Value

variable

Type: VarcharField

Variable

AlertQueue

class nav.models.event.AlertQueue(*args, **kwargs)

From NAV Wiki: The alert queue. Additional data in alertqvar and alertmsg. Event engine posts alerts on the alert queue (and in addition on the alerthist table). Alert engine will process the data on the alert queue and send alerts to users based on their alert profiles. When all signed up users have received the alert, alert engine will delete the alert from alertq (but not from alert history).

Parameters

• id (AutoField) – Primary key: Id

• subid (VarcharField) – Subid

• time (DateTimeField) – Time

• state (CharField) – State

• value (IntegerField) – Value

• severity (IntegerField) – Severity

Relationship fields:

Parameters

• source (ForeignKey to Subsystem) – Source (related name: alerts)

• device (ForeignKey to Device) – Device (related name: alerts)

• netbox (ForeignKey to Netbox) – Netbox (related name: alerts)

• event_type (ForeignKey to EventType) – Event type (related name: alerts)

• alert_type (ForeignKey to AlertType) – Alert type (related name: alerts)

• history (ForeignKey to AlertHistory) – History (related name: alerts)

Reverse relationships:

Parameters

• messages (Reverse ForeignKey from AlertQueueMessage) – All messages of this alert queue (related name of alert_queue)

• variables (Reverse ForeignKey from AlertQueueVariable) – All variables of this alert queue (related name of alert_queue)

• queued_alerts (Reverse ForeignKey from AccountAlertQueue) – All queued alerts of this alert queue (related name of alert)

exception DoesNotExist

exception MultipleObjectsReturned

STATE_CHOICES = (('x', 'stateless'), ('s', 'start'), ('e', 'end'))

STATE_END = 'e'

STATE_START = 's'

STATE_STATELESS = 'x'

alert_type

Type: ForeignKey to AlertType

Alert type (related name: alerts)

alert_type_id

Internal field, use alert_type instead.

device

Type: ForeignKey to Device

Device (related name: alerts)

device_id

Internal field, use device instead.

event_type

Type: ForeignKey to EventType

Event type (related name: alerts)

event_type_id

Internal field, use event_type instead.

get_next_by_time(*, field=<django.db.models.DateTimeField: time>, is_next=True, **kwargs)

Finds next instance based on time. See get_next_by_FOO() for more information.

get_previous_by_time(*, field=<django.db.models.DateTimeField: time>, is_next=False, **kwargs)

Finds previous instance based on time. See get_previous_by_FOO() for more information.

get_state_display(*, field=<django.db.models.CharField: state>)

Shows the label of the state. See get_FOO_display() for more information.

history

Type: ForeignKey to AlertHistory

History (related name: alerts)

history_id

Internal field, use history instead.

id

Type: AutoField

Primary key: Id

messages

Type: Reverse ForeignKey from AlertQueueMessage

All messages of this alert queue (related name of alert_queue)

netbox

Type: ForeignKey to Netbox

Netbox (related name: alerts)

netbox_id

Internal field, use netbox instead.

objects = <django.db.models.Manager object>

queued_alerts

Type: Reverse ForeignKey from AccountAlertQueue

All queued alerts of this alert queue (related name of alert)

save(*args, **kwargs)

Save the current instance. Override this in a subclass if you want to control the saving process.

The ‘force_insert’ and ‘force_update’ parameters can be used to insist that the “save” must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set.

severity

Type: IntegerField

Severity

source

Type: ForeignKey to Subsystem

Source (related name: alerts)

source_id

Internal field, use source instead.

state

Type: CharField

State

Choices:

• x

• s

• e

subid

Type: VarcharField

Subid

time

Type: DateTimeField

Time

value

Type: IntegerField

Value

variables

Type: Reverse ForeignKey from AlertQueueVariable

All variables of this alert queue (related name of alert_queue)

varmap

AlertQueueVariable

class nav.models.event.AlertQueueVariable(*args, **kwargs)

From NAV Wiki: Defines additional (key,value) tuples that follow alert. Note: the eventqvar tuples are passed along to the alertqvar table so that the variables may be used in alert profiles.

Parameters

• id (AutoField) – Primary key: Id

• variable (VarcharField) – Variable

• value (TextField) – Value

Relationship fields:

Parameters

alert_queue (ForeignKey to AlertQueue) – Alert queue (related name: variables)

exception DoesNotExist

exception MultipleObjectsReturned

alert_queue

Type: ForeignKey to AlertQueue

Alert queue (related name: variables)

alert_queue_id

Internal field, use alert_queue instead.

id

Type: AutoField

Primary key: Id

objects = <django.db.models.Manager object>

value

Type: TextField

Value

variable

Type: VarcharField

Variable

AlertHistory

class nav.models.event.AlertHistory(*args, **kwargs)

From NAV Wiki: The alert history. Simular to the alert queue with one important distinction; alert history stores stateful events as one row, with the start and end time of the event.

Parameters

• id (AutoField) – Primary key: Id

• subid (VarcharField) – Subid

• start_time (DateTimeField) – Start time

• end_time (DateTimeInfinityField) – End time

• value (IntegerField) – Value

• severity (IntegerField) – Severity

Relationship fields:

Parameters

• source (ForeignKey to Subsystem) – Source (related name: alert_history_set)

• device (ForeignKey to Device) – Device (related name: alert_history_set)

• netbox (ForeignKey to Netbox) – Netbox (related name: alert_history_set)

• event_type (ForeignKey to EventType) – Event type (related name: alert_history_set)

• alert_type (ForeignKey to AlertType) – Alert type (related name: alert_history_set)

Reverse relationships:

Parameters

• alerts (Reverse ForeignKey from AlertQueue) – All alerts of this alert history (related name of history)

• messages (Reverse ForeignKey from AlertHistoryMessage) – All messages of this alert history (related name of alert_history)

• variables (Reverse ForeignKey from AlertHistoryVariable) – All variables of this alert history (related name of alert_history)

• acknowledgement (Reverse OneToOneField from Acknowledgement) – The acknowledgement of this alert history (related name of alert)

exception DoesNotExist

exception MultipleObjectsReturned

acknowledge(account, comment)

Acknowledges this alert using a given account and comment.

Any pre-existing acknowledgement will be overwritten.

acknowledgement

Type: Reverse OneToOneField from Acknowledgement

The acknowledgement of this alert history (related name of alert)

alert_type

Type: ForeignKey to AlertType

Alert type (related name: alert_history_set)

alert_type_id

Internal field, use alert_type instead.

alerts

Type: Reverse ForeignKey from AlertQueue

All alerts of this alert history (related name of history)

device

Type: ForeignKey to Device

Device (related name: alert_history_set)

device_id

Internal field, use device instead.

end_time

Type: DateTimeInfinityField

End time

event_type

Type: ForeignKey to EventType

Event type (related name: alert_history_set)

event_type_id

Internal field, use event_type instead.

get_downtime()

Returns the difference between start_time and end_time, the current downtime if the alert is still open, and None if the alert is stateless.

get_next_by_start_time(*, field=<django.db.models.DateTimeField: start_time>, is_next=True, **kwargs)

Finds next instance based on start_time. See get_next_by_FOO() for more information.

get_previous_by_start_time(*, field=<django.db.models.DateTimeField: start_time>, is_next=False, **kwargs)

Finds previous instance based on start_time. See get_previous_by_FOO() for more information.

id

Type: AutoField

Primary key: Id

is_acknowledged()

Returns an Acknowledgement instance if this alert has been acknowledged, otherwise None.

is_open()

Returns true if stateful and open.

is_stateful()

Returns true if the alert is stateful.

messages

Type: Reverse ForeignKey from AlertHistoryMessage

All messages of this alert history (related name of alert_history)

netbox

Type: ForeignKey to Netbox

Netbox (related name: alert_history_set)

netbox_id

Internal field, use netbox instead.

objects = <django.db.models.manager.ManagerFromAlertHistoryQuerySet object>

save(*args, **kwargs)

Save the current instance. Override this in a subclass if you want to control the saving process.

The ‘force_insert’ and ‘force_update’ parameters can be used to insist that the “save” must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set.

severity

Type: IntegerField

Severity

source

Type: ForeignKey to Subsystem

Source (related name: alert_history_set)

source_id

Internal field, use source instead.

start_time

Type: DateTimeField

Start time

subid

Type: VarcharField

Subid

value

Type: IntegerField

Value

variables

Type: Reverse ForeignKey from AlertHistoryVariable

All variables of this alert history (related name of alert_history)

varmap

Descriptor for simplified dict-like access to the AlertHistory stateful variable map.

NOTE: Updating the dictionary will not save it, the attribute must be assigned a dict value for a db update to take place.

AlertHistoryVariable

class nav.models.event.AlertHistoryVariable(*args, **kwargs)

From NAV Wiki: Defines additional (key,value) tuples that follow the alerthist record.

Parameters

• id (AutoField) – Primary key: Id

• state (CharField) – State

• variable (VarcharField) – Variable

• value (TextField) – Value

Relationship fields:

Parameters

alert_history (ForeignKey to AlertHistory) – Alert history (related name: variables)

exception DoesNotExist

exception MultipleObjectsReturned

STATE_CHOICES = (('x', 'stateless'), ('s', 'start'), ('e', 'end'))

STATE_END = 'e'

STATE_START = 's'

STATE_STATELESS = 'x'

alert_history

Type: ForeignKey to AlertHistory

Alert history (related name: variables)

alert_history_id

Internal field, use alert_history instead.

get_state_display(*, field=<django.db.models.CharField: state>)

Shows the label of the state. See get_FOO_display() for more information.

id

Type: AutoField

Primary key: Id

objects = <django.db.models.Manager object>

state

Type: CharField

State

Choices:

• x

• s

• e

value

Type: TextField

Value

variable

Type: VarcharField

Variable

AlertHistoryMessage

class nav.models.event.AlertHistoryMessage(*args, **kwargs)

From NAV Wiki: To have a history of the formatted messages too, they are stored in alerthistmsg.

Parameters

• id (AutoField) – Primary key: Id

• state (CharField) – State

• type (VarcharField) – Type

• language (VarcharField) – Language

• message (TextField) – Message

Relationship fields:

Parameters

alert_history (ForeignKey to AlertHistory) – Alert history (related name: messages)

exception DoesNotExist

exception MultipleObjectsReturned

STATE_CHOICES = (('x', 'stateless'), ('s', 'start'), ('e', 'end'))

STATE_END = 'e'

STATE_START = 's'

STATE_STATELESS = 'x'

alert_history

Type: ForeignKey to AlertHistory

Alert history (related name: messages)

alert_history_id

Internal field, use alert_history instead.

get_state_display(*, field=<django.db.models.CharField: state>)

Shows the label of the state. See get_FOO_display() for more information.

id

Type: AutoField

Primary key: Id

language

Type: VarcharField

Language

message

Type: TextField

Message

objects = <django.db.models.Manager object>

state

Type: CharField

State

Choices:

• x

• s

• e

type

Type: VarcharField

Type

EventMixIn

class nav.models.event.EventMixIn

MixIn for methods common to multiple event/alert/alerthistory models

SUBID_MAP = {'aggregateLinkState': 'Interface', 'bgpState': 'GatewayPeerSession', 'chassisState': 'NetboxEntity', 'fanState': 'PowerSupplyOrFan', 'linkState': 'Interface', 'moduleState': 'Module', 'psuState': 'PowerSupplyOrFan', 'serviceState': 'Service'}

get_key()

Returns an identifying key for this event.

The key is a tuple of identity attribute values and can be used as a dictionary key to keep track of events that reference the same problem.

get_subject()

Returns the subject of a given event/alert.

Sometimes, the subject is just a Netbox objects. Other times, it may be some physical or logical subcomponents of a Netbox.

EventType

class nav.models.event.EventType(*args, **kwargs)

From NAV Wiki: Defines event types.

Parameters

• id (CharField) – Primary key: Id

• description (VarcharField) – Description

• stateful (CharField) – Stateful

Reverse relationships:

Parameters

• events (Reverse ForeignKey from EventQueue) – All events of this event type (related name of event_type)

• alerts (Reverse ForeignKey from AlertQueue) – All alerts of this event type (related name of event_type)

• alert_types (Reverse ForeignKey from AlertType) – All alert types of this event type (related name of event_type)

• alert_history_set (Reverse ForeignKey from AlertHistory) – All alert history set of this event type (related name of event_type)

exception DoesNotExist

exception MultipleObjectsReturned

STATEFUL_CHOICES = (('y', 'stateful'), ('n', 'stateless'))

STATEFUL_FALSE = 'n'

STATEFUL_TRUE = 'y'

alert_history_set

Type: Reverse ForeignKey from AlertHistory

All alert history set of this event type (related name of event_type)

alert_types

Type: Reverse ForeignKey from AlertType

All alert types of this event type (related name of event_type)

alerts

Type: Reverse ForeignKey from AlertQueue

All alerts of this event type (related name of event_type)

description

Type: VarcharField

Description

events

Type: Reverse ForeignKey from EventQueue

All events of this event type (related name of event_type)

get_stateful_display(*, field=<django.db.models.CharField: stateful>)

Shows the label of the stateful. See get_FOO_display() for more information.

id

Type: CharField

Primary key: Id

objects = <django.db.models.Manager object>

stateful

Type: CharField

Stateful

Choices:

• y

• n

AlertType

class nav.models.event.AlertType(*args, **kwargs)

From NAV Wiki: Defines the alert types. An event type may have many alert types.

Parameters

• id (AutoField) – Primary key: Id

• name (VarcharField) – Name

• description (VarcharField) – Description

Relationship fields:

Parameters

event_type (ForeignKey to EventType) – Event type (related name: alert_types)

Reverse relationships:

Parameters

• alerts (Reverse ForeignKey from AlertQueue) – All alerts of this alert type (related name of alert_type)

• alert_history_set (Reverse ForeignKey from AlertHistory) – All alert history set of this alert type (related name of alert_type)

exception DoesNotExist

exception MultipleObjectsReturned

alert_history_set

Type: Reverse ForeignKey from AlertHistory

All alert history set of this alert type (related name of alert_type)

alerts

Type: Reverse ForeignKey from AlertQueue

All alerts of this alert type (related name of alert_type)

description

Type: VarcharField

Description

event_type

Type: ForeignKey to EventType

Event type (related name: alert_types)

event_type_id

Internal field, use event_type instead.

id

Type: AutoField

Primary key: Id

name

Type: VarcharField

Name

objects = <django.db.models.Manager object>